Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

78 files changed, 15488 insertions, 0 deletions

diff --git a/configmgr/CppunitTest_configmgr_unit.mk b/configmgr/CppunitTest_configmgr_unit.mk
new file mode 100644
index 000000000..fa0718dc2
--- /dev/null
+++ b/configmgr/CppunitTest_configmgr_unit.mk
@@ -0,0 +1,58 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#*************************************************************************
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+#*************************************************************************
+
+$(eval $(call gb_CppunitTest_CppunitTest,configmgr_unit))
+
+$(eval $(call gb_CppunitTest_add_exception_objects,configmgr_unit, \
+    configmgr/qa/unit/test \
+))
+
+$(eval $(call gb_CppunitTest_set_componentfile,configmgr_unit,configmgr/source/configmgr))
+
+$(eval $(call gb_CppunitTest_use_library_objects,configmgr_unit,configmgr))
+
+$(eval $(call gb_CppunitTest_use_sdk_api,configmgr_unit,))
+
+$(eval $(call gb_CppunitTest_use_custom_headers,configmgr_unit,\
+        officecfg/registry \
+))
+
+$(eval $(call gb_CppunitTest_use_libraries,configmgr_unit, \
+	    comphelper \
+	    cppu \
+	    cppuhelper \
+	    sal \
+	    salhelper \
+	    test \
+	    tl \
+	    unotest \
+	    xmlreader \
+		i18nlangtag \
+))
+
+$(eval $(call gb_CppunitTest_use_ure,configmgr_unit))
+
+$(eval $(call gb_CppunitTest_use_configuration,configmgr_unit))
+
+$(eval $(call gb_CppunitTest_use_components,configmgr_unit,\
+    i18npool/util/i18npool \
+    i18npool/source/search/i18nsearch \
+    sax/source/expatwrap/expwrap \
+    ucb/source/core/ucb1 \
+    ucb/source/ucp/file/ucpfile1 \
+    unoxml/source/service/unoxml \
+))
+
+$(eval $(call gb_CppunitTest_use_externals,configmgr_unit,\
+    boost_headers \
+    dconf \
+    icu_headers \
+))
diff --git a/configmgr/IwyuFilter_configmgr.yaml b/configmgr/IwyuFilter_configmgr.yaml
new file mode 100644
index 000000000..5cb79e6ae
--- /dev/null
+++ b/configmgr/IwyuFilter_configmgr.yaml
@@ -0,0 +1,56 @@
+---
+assumeFilename: configmgr/source/access.cxx
+excludelist:
+    configmgr/source/nodemap.hxx:
+    # Needed for direct member access
+    - node.hxx
+    configmgr/source/type.hxx:
+    # Needed for css shortcut
+    - sal/types.h
+    configmgr/source/access.cxx:
+    # Safer to keep for use in cppu:UnoType template
+    - com/sun/star/uno/XWeak.hpp
+    configmgr/source/dconf.cxx:
+    # Generic wrapper for dconf
+    - dconf/dconf.h
+    configmgr/source/broadcaster.cxx:
+    # Needed for template
+    - com/sun/star/beans/XPropertiesChangeListener.hpp
+    - com/sun/star/beans/XPropertyChangeListener.hpp
+    - com/sun/star/container/XContainerListener.hpp
+    - com/sun/star/lang/XEventListener.hpp
+    - com/sun/star/util/XChangesListener.hpp
+    configmgr/source/childaccess.cxx:
+    # Actually used
+    - vector
+    - com/sun/star/uno/XInterface.hpp
+    - com/sun/star/uno/Sequence.hxx
+    configmgr/source/configurationprovider.cxx:
+    # Actually used
+    - com/sun/star/uno/XInterface.hpp
+    configmgr/source/components.cxx:
+    # Actually used
+    - com/sun/star/uno/XComponentContext.hpp
+    configmgr/source/access.cxx:
+    # Actually used
+    - vector
+    - com/sun/star/beans/XPropertiesChangeListener.hpp
+    - com/sun/star/beans/XPropertyChangeListener.hpp
+    - com/sun/star/beans/XVetoableChangeListener.hpp
+    - com/sun/star/container/XContainerListener.hpp
+    - com/sun/star/lang/XEventListener.hpp
+    - com/sun/star/uno/XInterface.hpp
+    configmgr/source/parsemanager.cxx:
+    # Actually used
+    - set
+    configmgr/source/partial.cxx:
+    # Actually used
+    - set
+    configmgr/source/rootaccess.cxx:
+    # Actually used
+    - vector
+    - com/sun/star/util/ElementChange.hpp
+    - com/sun/star/util/XChangesListener.hpp
+    configmgr/source/xcdparser.cxx:
+    # Actually used
+    - set
diff --git a/configmgr/JunitTest_configmgr_unoapi.mk b/configmgr/JunitTest_configmgr_unoapi.mk
new file mode 100644
index 000000000..51dcc8a07
--- /dev/null
+++ b/configmgr/JunitTest_configmgr_unoapi.mk
@@ -0,0 +1,14 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call gb_JunitTest_JunitTest,configmgr_unoapi))
+
+$(eval $(call gb_JunitTest_set_unoapi_test_defaults,configmgr_unoapi,,module.sce))
+
+# vim: set noet sw=4 ts=4:
diff --git a/configmgr/Library_configmgr.mk b/configmgr/Library_configmgr.mk
new file mode 100644
index 000000000..11bba5f0f
--- /dev/null
+++ b/configmgr/Library_configmgr.mk
@@ -0,0 +1,67 @@
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call gb_Library_Library,configmgr))
+
+$(eval $(call gb_Library_set_precompiled_header,configmgr,configmgr/inc/pch/precompiled_configmgr))
+
+$(eval $(call gb_Library_add_exception_objects,configmgr, \
+    configmgr/source/access \
+    configmgr/source/broadcaster \
+    configmgr/source/childaccess \
+    configmgr/source/components \
+    configmgr/source/configurationprovider \
+    configmgr/source/configurationregistry \
+    configmgr/source/data \
+    configmgr/source/defaultprovider \
+    configmgr/source/groupnode \
+    configmgr/source/localizedpropertynode \
+    configmgr/source/localizedvaluenode \
+    configmgr/source/lock \
+    configmgr/source/modifications \
+    configmgr/source/node \
+    configmgr/source/nodemap \
+    configmgr/source/parsemanager \
+    configmgr/source/partial \
+    configmgr/source/propertynode \
+    configmgr/source/readonlyaccess \
+    configmgr/source/readwriteaccess \
+    configmgr/source/rootaccess \
+    configmgr/source/rootnode \
+    configmgr/source/setnode \
+    configmgr/source/type \
+    configmgr/source/update \
+    configmgr/source/valueparser \
+    configmgr/source/writemodfile \
+    configmgr/source/xcdparser \
+    configmgr/source/xcsparser \
+    configmgr/source/xcuparser \
+    configmgr/source/xmldata \
+    $(if $(ENABLE_DCONF),configmgr/source/dconf) \
+    $(if $(filter $(OS),WNT),configmgr/source/winreg) \
+))
+
+$(eval $(call gb_Library_use_externals,configmgr, \
+    boost_headers \
+    dconf \
+))
+
+$(eval $(call gb_Library_use_sdk_api,configmgr))
+
+$(eval $(call gb_Library_use_libraries,configmgr, \
+    comphelper \
+    cppu \
+    cppuhelper \
+    sal \
+    salhelper \
+    tl \
+    xmlreader \
+    i18nlangtag \
+))
+
+$(eval $(call gb_Library_set_componentfile,configmgr,configmgr/source/configmgr,services))
diff --git a/configmgr/Makefile b/configmgr/Makefile
new file mode 100644
index 000000000..ccb1c85a0
--- /dev/null
+++ b/configmgr/Makefile
@@ -0,0 +1,7 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+
+module_directory:=$(dir $(realpath $(firstword $(MAKEFILE_LIST))))
+
+include $(module_directory)/../solenv/gbuild/partial_build.mk
+
+# vim: set noet sw=4 ts=4:
diff --git a/configmgr/Module_configmgr.mk b/configmgr/Module_configmgr.mk
new file mode 100644
index 000000000..09212d436
--- /dev/null
+++ b/configmgr/Module_configmgr.mk
@@ -0,0 +1,24 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call gb_Module_Module,configmgr))
+
+$(eval $(call gb_Module_add_targets,configmgr,\
+    Library_configmgr \
+))
+
+$(eval $(call gb_Module_add_subsequentcheck_targets,configmgr,\
+    JunitTest_configmgr_unoapi \
+))
+
+$(eval $(call gb_Module_add_check_targets,configmgr,\
+    CppunitTest_configmgr_unit \
+))
+
+# vim: set noet sw=4 ts=4:
diff --git a/configmgr/README.md b/configmgr/README.md
new file mode 100644
index 000000000..0534b592e
--- /dev/null
+++ b/configmgr/README.md
@@ -0,0 +1,137 @@
+# UNO Services to Access the Configuration Database
+
+## Functional Overview
+
+This code parses the settings that are described in the `officecfg`
+directory, and provides a UNO API that code can use to set and get
+settings.
+
+## Source Overview
+
+    configurationprovider.cxx
+    configurationregistry.cxx
+    defaultprovider.cxx
+    services.cxx
+UNO service implementations.
+
+    access.cxx
+    childaccess.cxx
+    rootaccess.cxx
+UNO objects passed to clients.
+
+    components.cxx
+Central singleton that aggregates all data (reads in the XML files, manages
+modifications and global notifications).
+
+    groupnode.cxx
+    localizedpropertynode.cxx
+    localizedvaluenode.cxx
+    node.cxx
+    propertynode.cxx
+    setnode.cxx
+Internal representations of data nodes.
+
+    parsemanager.cxx
+    parser.hxx
+    valueparser.cxx
+    xcdparser.cxx
+    xcsparser.cxx
+    xcuparser.cxx
+    xmldata.cxx
+XML file reading.
+
+    modifications.cxx
+    writemodfile.cxx
+Modification management.
+
+    broadcaster.cxx
+Notification management.
+
+    additions.hxx
+    update.cxx
+Extension manager interface.
+
+    data.cxx
+    lock.cxx
+    nodemap.cxx
+    partial.cxx
+    path.hxx
+    type.cxx
+Utilities.
+
+
+## Some Implementation Notes
+
+### Mandatory Set Members
+
+- A set member can be marked as "mandatory," meaning that a member of that name
+must always be present in a set.
+
+- The above definition implies that calling replaceByName on a mandatory set
+member is OK.
+
+- The XCU format can contain `oor:mandatory` attributes on nodes.  (The XCS format
+does not support them.  In the `registrymodifications` file, `oor:mandatory`
+attributes should never be needed, as being mandatory cannot be controlled via
+the UNO API.)  The XCU reading code only evaluates the `oor:mandatory` attribute
+for set members, and ignores it everywhere else.
+
+- Only true sets support mandatory members.  A localized property for the "`*`"
+locale, though acting much like a set, does not support mandatory members.
+
+- The LibreOffice Registry Format document claims that group extension
+properties are implicitly mandatory, but at least the new configmgr code does
+not treat them like that (i.e., they can be removed again).
+
+- For simplicity, `setMandatory/getMandatory` are available as virtual functions
+at the base `Node`, even though they can only make sense for `GroupNodes` and
+SetNodes that are set members.  The default `getMandatory` implementation returns
+`NO_LAYER`, meaning `oor:mandatory` is not set to true in any layer.  (Returning
+`NO_LAYER` simplifies the code, e.g., `removeByName` does not have to check whether
+`getMandatory` is called on a member of a true set to decide whether to forbid
+removal.)
+
+- When committing changes (made through the UNO API), the "mandatory" status of
+inserted nodes must be updated (in case the insert is due to a `replaceByName`, or
+the "mandatory" flag was added by a concurrent modification of a lower layer).
+Also, for to-be-removed nodes, removal is ignored for (newly; due to concurrent
+modification of a lower layer) mandatory nodes (but still recorded in
+`registrymodifications`, so may take effect once the lower layer addition is
+removed again---whether or not that is a good idea).
+
+
+### XcuParser Modification Recording
+
+- `XcuParser` records modifications when reading user layer data
+(`valueParser_.getLayer() == Data::NO_LAYER`).
+
+- `oor:finalized and `oor:mandatory` attributes cannot be set via the UNO API, so
+it is assumed that user layer data does not contain them (for one, they are not
+written by `writeModFile`; for another, the logic to record modifications expects
+a `locprop(modify,fuse)` to be followed by one or more `value(fuse,remove)`, which
+would not necessarily be true if the `locprop` were only present in the user layer
+data to flag it as finalized).
+
+- The logic to record modifications considers the top of the XML element stack.
+In the following list of all possible cases, items marked with an asterisk are
+recorded:
+
+        ... group(modify,fuse) - group(modify,fuse) - ...
+        ... group(modify,fuse) - set(modify,fuse) - ...
+        ... group(modify,fuse) - *prop(modify,fuse,replace) - value(fuse)
+        ... group(modify,fuse) - *prop(remove)
+        ... group(modify,fuse) - locprop(modify,fuse) - *value(fuse)
+        ... group(modify,fuse) - locprop(modify,fuse) - *value(remove)
+        ... group(modify,fuse) - *locprop(replace) ...
+        ... set(modify,fuse,replace) - group(modify/fuse) - ...
+        ... set(modify,fuse,replace) - *group(replace/fuse) - ...
+        ... set(modify,fuse,replace) - *group(remove)
+        ... set(modify,fuse,replace) - set(modify/fuse) - ...
+        ... set(modify,fuse,replace) - *set(replace/fuse) - ...
+        ... set(modify,fuse,replace) - *set(remove)
+        Legend:
+            "...": zero or more further items
+            "- ...": one or more further items
+            "modify,fuse" etc.: any of those operations
+            "modify/fuse": a modify or a fuse on an existing member
+            "replace/fuse": a replace or a fuse on a non-existing member
diff --git a/configmgr/inc/pch/precompiled_configmgr.cxx b/configmgr/inc/pch/precompiled_configmgr.cxx
new file mode 100644
index 000000000..0d7480118
--- /dev/null
+++ b/configmgr/inc/pch/precompiled_configmgr.cxx
@@ -0,0 +1,12 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "precompiled_configmgr.hxx"
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/inc/pch/precompiled_configmgr.hxx b/configmgr/inc/pch/precompiled_configmgr.hxx
new file mode 100644
index 000000000..4de416427
--- /dev/null
+++ b/configmgr/inc/pch/precompiled_configmgr.hxx
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ This file has been autogenerated by update_pch.sh. It is possible to edit it
+ manually (such as when an include file has been moved/renamed/removed). All such
+ manual changes will be rewritten by the next run of update_pch.sh (which presumably
+ also fixes all possible problems, so it's usually better to use it).
+
+ Generated on 2021-04-08 13:55:35 using:
+ ./bin/update_pch configmgr configmgr --cutoff=6 --exclude:system --include:module --include:local
+
+ If after updating build fails, use the following command to locate conflicting headers:
+ ./bin/update_pch_bisect ./configmgr/inc/pch/precompiled_configmgr.hxx "make configmgr.build" --find-conflicts
+*/
+
+#include <sal/config.h>
+#if PCH_LEVEL >= 1
+#include <cassert>
+#include <chrono>
+#include <cstddef>
+#include <limits>
+#include <new>
+#include <ostream>
+#include <set>
+#include <string.h>
+#include <string_view>
+#include <type_traits>
+#include <utility>
+#include <vector>
+#endif // PCH_LEVEL >= 1
+#if PCH_LEVEL >= 2
+#include <osl/conditn.hxx>
+#include <osl/diagnose.h>
+#include <osl/file.hxx>
+#include <osl/interlck.h>
+#include <osl/mutex.hxx>
+#include <osl/thread.h>
+#include <osl/time.h>
+#include <rtl/alloc.h>
+#include <rtl/bootstrap.hxx>
+#include <rtl/character.hxx>
+#include <rtl/locale.h>
+#include <rtl/ref.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/string.h>
+#include <rtl/textcvt.h>
+#include <rtl/textenc.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.h>
+#include <rtl/ustring.hxx>
+#include <rtl/uuid.h>
+#include <sal/detail/log.h>
+#include <sal/log.hxx>
+#include <sal/saldllapi.h>
+#include <sal/types.h>
+#endif // PCH_LEVEL >= 2
+#if PCH_LEVEL >= 3
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/Type.h>
+#include <com/sun/star/uno/TypeClass.hdl>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <cppu/cppudllapi.h>
+#include <cppu/unotype.hxx>
+#include <cppuhelper/cppuhelperdllapi.h>
+#include <cppuhelper/weak.hxx>
+#include <salhelper/thread.hxx>
+#include <typelib/typeclass.h>
+#include <typelib/typedescription.h>
+#include <typelib/uik.h>
+#include <uno/data.h>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+#endif // PCH_LEVEL >= 3
+#if PCH_LEVEL >= 4
+#endif // PCH_LEVEL >= 4
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/qa/unit/test.cxx b/configmgr/qa/unit/test.cxx
new file mode 100644
index 000000000..daa207008
--- /dev/null
+++ b/configmgr/qa/unit/test.cxx
@@ -0,0 +1,470 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/beans/PropertyChangeEvent.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertyState.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XNameReplace.hpp>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <osl/time.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/configuration.hxx>
+#include <comphelper/configurationlistener.hxx>
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+#include <officecfg/Office/Math.hxx>
+
+namespace {
+
+class Test: public CppUnit::TestFixture {
+public:
+    virtual void setUp() override;
+
+    void testKeyFetch();
+    void testKeySet();
+    void testKeyReset();
+    void testSetSetMemberName();
+    void testInsertSetMember();
+    void testReadCommands();
+    void testListener();
+    void testRecursive();
+    void testCrossThreads();
+
+    css::uno::Any getKey(
+        OUString const & path, OUString const & relative) const;
+
+    void setKey(
+        OUString const & path, OUString const & name,
+        css::uno::Any const & value) const;
+
+    bool resetKey(OUString const & path, OUString const & name) const;
+
+    css::uno::Reference< css::uno::XInterface > createViewAccess(
+        OUString const & path) const;
+
+    css::uno::Reference< css::uno::XInterface > createUpdateAccess(
+        OUString const & path) const;
+
+    CPPUNIT_TEST_SUITE(Test);
+    CPPUNIT_TEST(testKeyFetch);
+    CPPUNIT_TEST(testKeySet);
+    CPPUNIT_TEST(testKeyReset);
+    CPPUNIT_TEST(testSetSetMemberName);
+    CPPUNIT_TEST(testInsertSetMember);
+    CPPUNIT_TEST(testReadCommands);
+    CPPUNIT_TEST(testListener);
+    CPPUNIT_TEST(testRecursive);
+    CPPUNIT_TEST(testCrossThreads);
+    CPPUNIT_TEST_SUITE_END();
+
+private:
+    css::uno::Reference< css::lang::XMultiServiceFactory > provider_;
+};
+
+class RecursiveTest:
+    public cppu::WeakImplHelper< css::beans::XPropertyChangeListener >
+{
+public:
+    RecursiveTest(Test const & theTest, int count, bool * destroyed);
+
+    void test();
+
+protected:
+    virtual ~RecursiveTest() override;
+
+    virtual void step() const = 0;
+
+    Test const & test_;
+
+private:
+    virtual void SAL_CALL disposing(css::lang::EventObject const &) override;
+
+    virtual void SAL_CALL propertyChange(
+        css::beans::PropertyChangeEvent const &) override;
+
+    int count_;
+    bool * destroyed_;
+    css::uno::Reference< css::beans::XPropertySet > properties_;
+};
+
+RecursiveTest::RecursiveTest(
+    Test const & theTest, int count, bool * destroyed):
+    test_(theTest), count_(count), destroyed_(destroyed)
+{}
+
+void RecursiveTest::test()
+{
+    properties_.set(
+        test_.createUpdateAccess(
+            "/org.openoffice.Office.UI.GenericCommands/UserInterface/Commands/"
+                     ".uno:WebHtml"),
+        css::uno::UNO_QUERY_THROW);
+    properties_->addPropertyChangeListener("Label", this);
+    step();
+    CPPUNIT_ASSERT_EQUAL(0, count_);
+    css::uno::Reference< css::lang::XComponent >(
+        properties_, css::uno::UNO_QUERY_THROW)->dispose();
+}
+
+RecursiveTest::~RecursiveTest()
+{
+    *destroyed_ = true;
+}
+
+void RecursiveTest::disposing(css::lang::EventObject const & Source)
+{
+    CPPUNIT_ASSERT(properties_.is());
+    CPPUNIT_ASSERT_EQUAL(
+        css::uno::Reference<css::uno::XInterface>(
+            properties_, css::uno::UNO_QUERY_THROW),
+        Source.Source);
+    properties_.clear();
+}
+
+void RecursiveTest::propertyChange(css::beans::PropertyChangeEvent const & evt)
+{
+    CPPUNIT_ASSERT_EQUAL(
+        css::uno::Reference<css::uno::XInterface>(
+            properties_, css::uno::UNO_QUERY_THROW),
+        evt.Source);
+    CPPUNIT_ASSERT_EQUAL( OUString("Label"), evt.PropertyName );
+    if (count_ > 0) {
+        --count_;
+        step();
+    }
+}
+
+class SimpleRecursiveTest: public RecursiveTest {
+public:
+    SimpleRecursiveTest(Test const & theTest, int count, bool * destroyed);
+
+private:
+    virtual void step() const override;
+};
+
+SimpleRecursiveTest::SimpleRecursiveTest(
+    Test const & theTest, int count, bool * destroyed):
+    RecursiveTest(theTest, count, destroyed)
+{}
+
+void SimpleRecursiveTest::step() const
+{
+    test_.setKey(
+        "/org.openoffice.Office.UI.GenericCommands/UserInterface/Commands/"
+                 ".uno:WebHtml",
+        "Label",
+        css::uno::Any(OUString("step")));
+}
+
+void Test::setUp()
+{
+    provider_ = css::configuration::theDefaultProvider::get(
+                        comphelper::getProcessComponentContext() );
+}
+
+void Test::testKeyFetch()
+{
+    OUString s;
+    CPPUNIT_ASSERT(
+        getKey(
+            "/org.openoffice.System",
+            "L10N/Locale") >>=
+        s);
+}
+
+void Test::testKeySet()
+{
+    setKey(
+        "/org.openoffice.System/L10N",
+        "Locale",
+        css::uno::Any(OUString("com.sun.star.configuration.backend.LocaleBackend UILocale")));
+    OUString s;
+    CPPUNIT_ASSERT(
+        getKey(
+            "/org.openoffice.System/L10N",
+            "Locale") >>=
+        s);
+    CPPUNIT_ASSERT_EQUAL( OUString("com.sun.star.configuration.backend.LocaleBackend UILocale"), s );
+}
+
+void Test::testKeyReset()
+{
+    if (resetKey(
+            "/org.openoffice.System/L10N",
+            "Locale"))
+    {
+        OUString s;
+        CPPUNIT_ASSERT(
+            getKey(
+                "/org.openoffice.System/L10N",
+                "Locale") >>=
+            s);
+        CPPUNIT_ASSERT_EQUAL( OUString("com.sun.star.configuration.backend.LocaleBackend Locale"), s );
+    }
+}
+
+void Test::testSetSetMemberName()
+{
+    OUString s;
+    CPPUNIT_ASSERT(
+        getKey(
+            "/org.openoffice.Office.UI.GenericCommands/UserInterface/Commands/"
+                     ".uno:FontworkShapeType",
+            "Label") >>=
+        s);
+    CPPUNIT_ASSERT_EQUAL( OUString("Fontwork Shape"), s );
+
+    css::uno::Reference< css::container::XNameAccess > access(
+        createUpdateAccess(
+            "/org.openoffice.Office.UI.GenericCommands/UserInterface/"
+                     "Commands"),
+        css::uno::UNO_QUERY_THROW);
+    css::uno::Reference< css::container::XNamed > member;
+    access->getByName(".uno:FontworkGalleryFloater") >>= member;
+    CPPUNIT_ASSERT(member.is());
+    member->setName(".uno:FontworkShapeType");
+    css::uno::Reference< css::util::XChangesBatch >(
+        access, css::uno::UNO_QUERY_THROW)->commitChanges();
+    css::uno::Reference< css::lang::XComponent >(
+        access, css::uno::UNO_QUERY_THROW)->dispose();
+
+    CPPUNIT_ASSERT(
+        getKey(
+            "/org.openoffice.Office.UI.GenericCommands/UserInterface/Commands/"
+                    ".uno:FontworkShapeType",
+            "Label") >>=
+        s);
+    CPPUNIT_ASSERT_EQUAL( OUString("Insert Fontwork"), s );
+}
+
+void Test::testInsertSetMember() {
+    css::uno::Reference<css::container::XNameContainer> access(
+        createUpdateAccess(
+            "/org.openoffice.Office.UI.GenericCommands/UserInterface/Commands"),
+        css::uno::UNO_QUERY_THROW);
+    css::uno::Reference<css::uno::XInterface> member;
+    member.set(
+        css::uno::Reference<css::lang::XSingleServiceFactory>(
+            access, css::uno::UNO_QUERY_THROW)->createInstance());
+    CPPUNIT_ASSERT(member.is());
+    access->insertByName("A", css::uno::Any(member));
+    member.set(
+        css::uno::Reference<css::lang::XSingleServiceFactory>(
+            access, css::uno::UNO_QUERY_THROW)->createInstance());
+    CPPUNIT_ASSERT(member.is());
+    try {
+        access->insertByName("", css::uno::Any(member));
+        CPPUNIT_FAIL("expected IllegalArgumentException");
+    } catch (css::lang::IllegalArgumentException &) {}
+    try {
+        access->insertByName("\x01", css::uno::Any(member));
+        CPPUNIT_FAIL("expected IllegalArgumentException");
+    } catch (css::lang::IllegalArgumentException &) {}
+    try {
+        access->insertByName("a/b", css::uno::Any(member));
+    } catch (css::lang::IllegalArgumentException &) {
+        CPPUNIT_FAIL("unexpected IllegalArgumentException");
+    }
+    css::uno::Reference<css::util::XChangesBatch>(
+        access, css::uno::UNO_QUERY_THROW)->commitChanges();
+    css::uno::Reference<css::lang::XComponent>(
+        access, css::uno::UNO_QUERY_THROW)->dispose();
+}
+
+void Test::testReadCommands()
+{
+    css::uno::Reference< css::container::XNameAccess > access(
+        createViewAccess(
+            "/org.openoffice.Office.UI.GenericCommands/UserInterface/"
+                     "Commands"),
+        css::uno::UNO_QUERY_THROW);
+    const css::uno::Sequence< OUString > names(access->getElementNames());
+
+    /*CPPUNIT_ASSERT_EQUAL(749, names.getLength());*/
+    // testSetSetMemberName() already removed ".uno:FontworkGalleryFloater"
+    sal_uInt32 n = osl_getGlobalTimer();
+    for (int i = 0; i < 8; ++i) {
+        for (OUString const & childName : names) {
+            css::uno::Reference< css::container::XNameAccess > child;
+            if (access->getByName(childName) >>= child) {
+                CPPUNIT_ASSERT(child.is());
+                child->getByName("Label");
+                child->getByName("ContextLabel");
+                child->getByName("Properties");
+            }
+        }
+    }
+    n = osl_getGlobalTimer() - n;
+    printf("Reading elements took %" SAL_PRIuUINT32 " ms\n", n);
+    css::uno::Reference< css::lang::XComponent >(
+        access, css::uno::UNO_QUERY_THROW)->dispose();
+}
+
+void Test::testListener()
+{
+    OUString aRandomPath = "/org.openoffice.Office.Math/View";
+
+    // test with no props.
+    {
+        rtl::Reference xListener(
+            new comphelper::ConfigurationListener(aRandomPath));
+        xListener->dispose();
+    }
+
+    // test some changes
+    {
+        rtl::Reference xListener(
+            new comphelper::ConfigurationListener(aRandomPath));
+
+        comphelper::ConfigurationListenerProperty<bool> aSetting(xListener, "AutoRedraw");
+        CPPUNIT_ASSERT_MESSAGE("check AutoRedraw defaults to true", aSetting.get());
+
+        // set to false
+        {
+            std::shared_ptr< comphelper::ConfigurationChanges > xChanges(
+                comphelper::ConfigurationChanges::create());
+            officecfg::Office::Math::View::AutoRedraw::set(false, xChanges);
+            xChanges->commit();
+        }
+        CPPUNIT_ASSERT_MESSAGE("listener failed to trigger", !aSetting.get());
+
+        // set to true
+        {
+            std::shared_ptr< comphelper::ConfigurationChanges > xChanges(
+                comphelper::ConfigurationChanges::create());
+            officecfg::Office::Math::View::AutoRedraw::set(true, xChanges);
+            xChanges->commit();
+        }
+        CPPUNIT_ASSERT_MESSAGE("listener failed to trigger", aSetting.get());
+
+        xListener->dispose();
+    }
+}
+
+void Test::testRecursive()
+{
+    bool destroyed = false;
+    rtl::Reference< RecursiveTest >(
+        new SimpleRecursiveTest(*this, 100, &destroyed))->test();
+    CPPUNIT_ASSERT(destroyed);
+}
+
+void Test::testCrossThreads()
+{
+    bool destroyed = false;
+    rtl::Reference< RecursiveTest >(
+        new SimpleRecursiveTest(*this, 10, &destroyed))->test();
+    CPPUNIT_ASSERT(destroyed);
+}
+
+css::uno::Any Test::getKey(
+    OUString const & path, OUString const & relative) const
+{
+    css::uno::Reference< css::container::XHierarchicalNameAccess > access(
+        createViewAccess(path), css::uno::UNO_QUERY_THROW);
+    css::uno::Any value(access->getByHierarchicalName(relative));
+    css::uno::Reference< css::lang::XComponent >(
+        access, css::uno::UNO_QUERY_THROW)->dispose();
+    return value;
+}
+
+void Test::setKey(
+    OUString const & path, OUString const & name,
+    css::uno::Any const & value) const
+{
+    css::uno::Reference< css::container::XNameReplace > access(
+        createUpdateAccess(path), css::uno::UNO_QUERY_THROW);
+    access->replaceByName(name, value);
+    css::uno::Reference< css::util::XChangesBatch >(
+        access, css::uno::UNO_QUERY_THROW)->commitChanges();
+    css::uno::Reference< css::lang::XComponent >(
+        access, css::uno::UNO_QUERY_THROW)->dispose();
+}
+
+bool Test::resetKey(OUString const & path, OUString const & name)
+    const
+{
+    //TODO: support setPropertyToDefault
+    css::uno::Reference< css::util::XChangesBatch > access(
+        createUpdateAccess(path), css::uno::UNO_QUERY_THROW);
+    css::uno::Reference< css::beans::XPropertyState > state(
+        access, css::uno::UNO_QUERY);
+    if (!state.is()) {
+        return false;
+    }
+    state->setPropertyToDefault(name);
+    access->commitChanges();
+    css::uno::Reference< css::lang::XComponent >(
+        access, css::uno::UNO_QUERY_THROW)->dispose();
+    return true;
+}
+
+css::uno::Reference< css::uno::XInterface > Test::createViewAccess(
+    OUString const & path) const
+{
+    css::uno::Any arg(
+            css::beans::NamedValue(
+                "nodepath",
+                css::uno::Any(path)));
+    return provider_->createInstanceWithArguments(
+        "com.sun.star.configuration.ConfigurationAccess",
+        css::uno::Sequence< css::uno::Any >(&arg, 1));
+}
+
+css::uno::Reference< css::uno::XInterface > Test::createUpdateAccess(
+    OUString const & path) const
+{
+    css::uno::Any arg(
+            css::beans::NamedValue(
+                "nodepath",
+                css::uno::Any(path)));
+    return provider_->createInstanceWithArguments(
+        "com.sun.star.configuration.ConfigurationUpdateAccess",
+        css::uno::Sequence< css::uno::Any >(&arg, 1));
+}
+
+CPPUNIT_TEST_SUITE_REGISTRATION(Test);
+
+}
+
+CPPUNIT_PLUGIN_IMPLEMENT();
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/qa/unit/urebootstrap.ini b/configmgr/qa/unit/urebootstrap.ini
new file mode 100644
index 000000000..24b5e0f71
--- /dev/null
+++ b/configmgr/qa/unit/urebootstrap.ini
@@ -0,0 +1,20 @@
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This file incorporates work covered by the following license notice:
+#
+#   Licensed to the Apache Software Foundation (ASF) under one or more
+#   contributor license agreements. See the NOTICE file distributed
+#   with this work for additional information regarding copyright
+#   ownership. The ASF licenses this file to you under the Apache
+#   License, Version 2.0 (the "License"); you may not use this file
+#   except in compliance with the License. You may obtain a copy of
+#   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+#
+
+[Bootstrap]
+BRAND_BASE_DIR = $ORIGIN/brand
diff --git a/configmgr/qa/unoapi/module.sce b/configmgr/qa/unoapi/module.sce
new file mode 100644
index 000000000..1dd452554
--- /dev/null
+++ b/configmgr/qa/unoapi/module.sce
@@ -0,0 +1,20 @@
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This file incorporates work covered by the following license notice:
+#
+#   Licensed to the Apache Software Foundation (ASF) under one or more
+#   contributor license agreements. See the NOTICE file distributed
+#   with this work for additional information regarding copyright
+#   ownership. The ASF licenses this file to you under the Apache
+#   License, Version 2.0 (the "License"); you may not use this file
+#   except in compliance with the License. You may obtain a copy of
+#   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+#
+
+-o configmgr.ConfigurationProvider
+-o configmgr.DefaultProvider
diff --git a/configmgr/source/access.cxx b/configmgr/source/access.cxx
new file mode 100644
index 000000000..865d38300
--- /dev/null
+++ b/configmgr/source/access.cxx
@@ -0,0 +1,2212 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <cstdlib>
+#include <utility>
+#include <vector>
+
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/PropertyAttribute.hpp>
+#include <com/sun/star/beans/PropertyChangeEvent.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <com/sun/star/beans/XExactName.hpp>
+#include <com/sun/star/beans/XHierarchicalPropertySet.hpp>
+#include <com/sun/star/beans/XHierarchicalPropertySetInfo.hpp>
+#include <com/sun/star/beans/XMultiHierarchicalPropertySet.hpp>
+#include <com/sun/star/beans/XMultiPropertySet.hpp>
+#include <com/sun/star/beans/XPropertiesChangeListener.hpp>
+#include <com/sun/star/beans/XProperty.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/beans/XVetoableChangeListener.hpp>
+#include <com/sun/star/container/ContainerEvent.hpp>
+#include <com/sun/star/container/NoSuchElementException.hpp>
+#include <com/sun/star/container/XContainer.hpp>
+#include <com/sun/star/container/XContainerListener.hpp>
+#include <com/sun/star/container/XElementAccess.hpp>
+#include <com/sun/star/container/XHierarchicalName.hpp>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/container/XHierarchicalNameReplace.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/lang/XTypeProvider.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/Type.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/uno/XWeak.hpp>
+#include <com/sun/star/util/ElementChange.hpp>
+#include <comphelper/sequence.hxx>
+#include <comphelper/servicehelper.hxx>
+#include <comphelper/lok.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <cppu/unotype.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/interlck.h>
+#include <osl/mutex.hxx>
+#include <rtl/character.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <sal/types.h>
+
+#include "access.hxx"
+#include "broadcaster.hxx"
+#include "childaccess.hxx"
+#include "components.hxx"
+#include "data.hxx"
+#include "groupnode.hxx"
+#include "localizedpropertynode.hxx"
+#include "localizedvaluenode.hxx"
+#include "lock.hxx"
+#include "modifications.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "propertynode.hxx"
+#include "rootaccess.hxx"
+#include "setnode.hxx"
+#include "type.hxx"
+
+namespace configmgr {
+
+namespace {
+
+// Conservatively forbid what is either not an XML Char (including lone
+// surrogates, even though they should not appear in well-formed UNO OUString
+// instances anyway), or is a slash (as it causes problems in path syntax):
+bool isValidName(OUString const & name, bool setMember) {
+    for (sal_Int32 i = 0; i != name.getLength();) {
+        sal_uInt32 c = name.iterateCodePoints(&i);
+        if ((c < 0x20 && !(c == 0x09 || c == 0x0A || c == 0x0D))
+            || rtl::isSurrogate(c) || c == 0xFFFE || c == 0xFFFF
+            || (!setMember && c == '/'))
+        {
+            return false;
+        }
+    }
+    return !name.isEmpty();
+}
+
+}
+
+oslInterlockedCount Access::acquireCounting() {
+    return osl_atomic_increment(&m_refCount);
+}
+
+void Access::releaseNondeleting() {
+    osl_atomic_decrement(&m_refCount);
+}
+
+bool Access::isValue() {
+    rtl::Reference< Node > p(getNode());
+    switch (p->kind()) {
+    case Node::KIND_PROPERTY:
+    case Node::KIND_LOCALIZED_VALUE:
+        return true;
+    case Node::KIND_LOCALIZED_PROPERTY:
+        return !Components::allLocales(getRootAccess()->getLocale());
+    default:
+        return false;
+    }
+}
+
+void Access::markChildAsModified(rtl::Reference< ChildAccess > const & child) {
+    assert(child.is() && child->getParentAccess() == this);
+    modifiedChildren_[child->getNameInternal()] = ModifiedChild(child, true);
+    for (rtl::Reference< Access > p(this);;) {
+        rtl::Reference< Access > parent(p->getParentAccess());
+        if (!parent.is()) {
+            break;
+        }
+        assert(dynamic_cast< ChildAccess * >(p.get()) != nullptr);
+        parent->modifiedChildren_.emplace(
+                p->getNameInternal(),
+                ModifiedChild(static_cast< ChildAccess * >(p.get()), false));
+        p = parent;
+    }
+}
+
+void Access::releaseChild(OUString const & name) {
+    cachedChildren_.erase(name);
+}
+
+void Access::initBroadcaster(
+    Modifications::Node const & modifications, Broadcaster * broadcaster)
+{
+    initBroadcasterAndChanges(modifications, broadcaster, nullptr);
+}
+
+css::uno::Sequence< css::uno::Type > Access::getTypes()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    std::vector< css::uno::Type > types { cppu::UnoType< css::uno::XInterface >::get(),
+                                          cppu::UnoType< css::uno::XWeak >::get(),
+                                          cppu::UnoType< css::lang::XTypeProvider >::get(),
+                                          cppu::UnoType< css::lang::XServiceInfo >::get(),
+                                          cppu::UnoType< css::lang::XComponent >::get(),
+                                          cppu::UnoType< css::container::XContainer >::get(),
+                                          cppu::UnoType< css::beans::XExactName >::get(),
+                                          cppu::UnoType< css::container::XHierarchicalName >::get(),
+                                          cppu::UnoType< css::container::XNamed >::get(),
+                                          cppu::UnoType< css::beans::XProperty >::get(),
+                                          cppu::UnoType< css::container::XElementAccess >::get(),
+                                          cppu::UnoType< css::container::XNameAccess >::get()
+                                        };
+    if (getNode()->kind() == Node::KIND_GROUP) {
+        types.push_back(cppu::UnoType< css::beans::XPropertySetInfo >::get());
+        types.push_back(cppu::UnoType< css::beans::XPropertySet >::get());
+        types.push_back(cppu::UnoType< css::beans::XMultiPropertySet >::get());
+        types.push_back(
+            cppu::UnoType< css::beans::XHierarchicalPropertySet >::get());
+        types.push_back(
+            cppu::UnoType< css::beans::XMultiHierarchicalPropertySet >::get());
+        types.push_back(
+            cppu::UnoType< css::beans::XHierarchicalPropertySetInfo >::get());
+    }
+    if (getRootAccess()->isUpdate()) {
+        types.push_back(cppu::UnoType< css::container::XNameReplace >::get());
+        types.push_back(
+            cppu::UnoType< css::container::XHierarchicalNameReplace >::get());
+        if (getNode()->kind() != Node::KIND_GROUP ||
+            static_cast< GroupNode * >(getNode().get())->isExtensible())
+        {
+            types.push_back(
+                cppu::UnoType< css::container::XNameContainer >::get());
+        }
+        if (getNode()->kind() == Node::KIND_SET) {
+            types.push_back(
+                cppu::UnoType< css::lang::XSingleServiceFactory >::get());
+        }
+    } else {
+        types.push_back(
+            cppu::UnoType< css::container::XHierarchicalNameAccess >::get());
+    }
+    addTypes(&types);
+    return comphelper::containerToSequence(types);
+}
+
+css::uno::Sequence< sal_Int8 > Access::getImplementationId()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return css::uno::Sequence< sal_Int8 >();
+}
+
+OUString Access::getImplementationName()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return "org.openoffice-configmgr::Access";
+}
+
+sal_Bool Access::supportsService(OUString const & ServiceName)
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+css::uno::Sequence< OUString > Access::getSupportedServiceNames()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    std::vector<OUString> services;
+    services.emplace_back("com.sun.star.configuration.ConfigurationAccess");
+    if (getRootAccess()->isUpdate()) {
+        services.emplace_back("com.sun.star.configuration.ConfigurationUpdateAccess");
+    }
+    services.emplace_back("com.sun.star.configuration.HierarchyAccess");
+    services.emplace_back("com.sun.star.configuration.HierarchyElement");
+    if (getNode()->kind() == Node::KIND_GROUP) {
+        services.emplace_back("com.sun.star.configuration.GroupAccess");
+        services.emplace_back("com.sun.star.configuration.PropertyHierarchy");
+        if (getRootAccess()->isUpdate()) {
+            services.emplace_back("com.sun.star.configuration.GroupUpdate");
+        }
+    } else {
+        services.emplace_back("com.sun.star.configuration.SetAccess");
+        services.emplace_back("com.sun.star.configuration.SimpleSetAccess");
+        if (getRootAccess()->isUpdate()) {
+            services.emplace_back("com.sun.star.configuration.SetUpdate");
+            services.emplace_back("com.sun.star.configuration.SimpleSetUpdate");
+        }
+    }
+    addSupportedServiceNames(&services);
+    return comphelper::containerToSequence(services);
+}
+
+void Access::dispose() {
+    assert(thisIs(IS_ANY));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        if (getParentAccess().is()) {
+            throw css::uno::RuntimeException(
+                "configmgr dispose inappropriate Access",
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        if (disposed_) {
+            return;
+        }
+        initDisposeBroadcaster(&bc);
+        clearListeners();
+        disposed_ = true;
+    }
+    bc.send();
+}
+
+void Access::addEventListener(
+    css::uno::Reference< css::lang::XEventListener > const & xListener)
+{
+    assert(thisIs(IS_ANY));
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        if (!xListener.is()) {
+            throw css::uno::RuntimeException(
+                "null listener", static_cast< cppu::OWeakObject * >(this));
+        }
+        if (!disposed_) {
+            disposeListeners_.insert(xListener);
+            return;
+        }
+    }
+    try {
+        xListener->disposing(
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    } catch (css::lang::DisposedException &) {}
+}
+
+void Access::removeEventListener(
+    css::uno::Reference< css::lang::XEventListener > const & aListener)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    DisposeListeners::iterator i(disposeListeners_.find(aListener));
+    if (i != disposeListeners_.end()) {
+        disposeListeners_.erase(i);
+    }
+}
+
+css::uno::Type Access::getElementType() {
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    rtl::Reference< Node > p(getNode());
+    switch (p->kind()) {
+    case Node::KIND_LOCALIZED_PROPERTY:
+        return mapType(
+            static_cast< LocalizedPropertyNode * >(p.get())->getStaticType());
+    case Node::KIND_GROUP:
+        //TODO: Should a specific type be returned for a non-extensible group
+        // with homogeneous members or for an extensible group that currently
+        // has only homogeneous members?
+        return cppu::UnoType<void>::get();
+    case Node::KIND_SET:
+        return cppu::UnoType<void>::get(); //TODO: correct?
+    default:
+        assert(false);
+        throw css::uno::RuntimeException(
+            "this cannot happen", static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+sal_Bool Access::hasElements() {
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return !getAllChildren().empty(); //TODO: optimize
+}
+
+bool Access::getByNameFast(const OUString & name, css::uno::Any & value)
+{
+    bool bGotValue = false;
+    rtl::Reference< ChildAccess > child;
+
+    if (getNode()->kind() != Node::KIND_LOCALIZED_PROPERTY)
+    { // try to get it directly
+        ModifiedChildren::iterator i(modifiedChildren_.find(name));
+        if (i != modifiedChildren_.end())
+        {
+            child = getModifiedChild(i);
+            if (child.is())
+            {
+                value = child->asValue();
+                bGotValue = true;
+            }
+        }
+        else
+        {
+            rtl::Reference< Node > node(getNode()->getMember(name));
+            if (!node.is())
+                return false;
+            bGotValue = ChildAccess::asSimpleValue(node, value, components_);
+        }
+    }
+
+    if (!bGotValue)
+    {
+        child = getChild(name);
+        if (!child.is())
+            return false;
+        value = child->asValue();
+    }
+    return true;
+}
+
+css::uno::Any Access::getByName(OUString const & aName)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    css::uno::Any value;
+    if (!getByNameFast(aName, value))
+        throw css::container::NoSuchElementException(
+            aName, static_cast< cppu::OWeakObject * >(this));
+    return value;
+}
+
+css::uno::Sequence< OUString > Access::getElementNames()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    std::vector< rtl::Reference< ChildAccess > > children(getAllChildren());
+    css::uno::Sequence<OUString> names(children.size());
+    OUString* pArray = names.getArray();
+    for (auto const& child : children)
+    {
+        *pArray++ = child->getNameInternal();
+    }
+    return names;
+}
+
+sal_Bool Access::hasByName(OUString const & aName)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return getChild(aName).is();
+}
+
+css::uno::Any Access::getByHierarchicalName(OUString const & aName)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    rtl::Reference< ChildAccess > child(getSubChild(aName));
+    if (!child.is()) {
+        throw css::container::NoSuchElementException(
+            aName, static_cast< cppu::OWeakObject * >(this));
+    }
+    return child->asValue();
+}
+
+sal_Bool Access::hasByHierarchicalName(OUString const & aName)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return getSubChild(aName).is();
+}
+
+void Access::replaceByHierarchicalName(
+    OUString const & aName, css::uno::Any const & aElement)
+{
+    //TODO: Actually support sets and combine with replaceByName:
+    assert(thisIs(IS_UPDATE));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        rtl::Reference< ChildAccess > child(getSubChild(aName));
+        if (!child.is()) {
+            throw css::container::NoSuchElementException(
+                aName, static_cast< cppu::OWeakObject * >(this));
+        }
+        child->checkFinalized();
+        rtl::Reference< Node > parent(child->getParentNode());
+        assert(parent.is());
+        Modifications localMods;
+        switch (parent->kind()) {
+        case Node::KIND_LOCALIZED_PROPERTY:
+        case Node::KIND_GROUP:
+            child->setProperty(aElement, &localMods);
+            break;
+        case Node::KIND_SET:
+            throw css::lang::IllegalArgumentException(
+                ("configmgr::Access::replaceByHierarchicalName does not"
+                 " currently support set members"),
+                static_cast< cppu::OWeakObject * >(this), 0);
+        case Node::KIND_ROOT:
+            throw css::lang::IllegalArgumentException(
+                ("configmgr::Access::replaceByHierarchicalName does not allow"
+                 " changing component " + aName),
+                static_cast< cppu::OWeakObject * >(this), 0);
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+void Access::addContainerListener(
+    css::uno::Reference< css::container::XContainerListener > const & xListener)
+{
+    assert(thisIs(IS_ANY));
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        if (!xListener.is()) {
+            throw css::uno::RuntimeException(
+                "null listener", static_cast< cppu::OWeakObject * >(this));
+        }
+        if (!disposed_) {
+            containerListeners_.insert(xListener);
+            return;
+        }
+    }
+    try {
+        xListener->disposing(
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    } catch (css::lang::DisposedException &) {}
+}
+
+void Access::removeContainerListener(
+    css::uno::Reference< css::container::XContainerListener > const & xListener)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    ContainerListeners::iterator i(containerListeners_.find(xListener));
+    if (i != containerListeners_.end()) {
+        containerListeners_.erase(i);
+    }
+}
+
+OUString Access::getExactName(OUString const & aApproximateName)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return aApproximateName;
+}
+
+css::uno::Sequence< css::beans::Property > Access::getProperties()
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    std::vector< rtl::Reference< ChildAccess > > children(getAllChildren());
+    std::vector< css::beans::Property > properties;
+    properties.reserve(children.size());
+    for (auto const& child : children)
+    {
+        properties.push_back(child->asProperty());
+    }
+    return comphelper::containerToSequence(properties);
+}
+
+css::beans::Property Access::getPropertyByName(OUString const & aName)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    rtl::Reference< ChildAccess > child(getChild(aName));
+    if (!child.is()) {
+        throw css::beans::UnknownPropertyException(
+            aName, static_cast< cppu::OWeakObject * >(this));
+    }
+    return child->asProperty();
+}
+
+sal_Bool Access::hasPropertyByName(OUString const & Name)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    return getChild(Name).is();
+}
+
+OUString Access::getHierarchicalName() {
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    // For backwards compatibility, return an absolute path representation where
+    // available:
+    OUString rootPath;
+    rtl::Reference< RootAccess > root(getRootAccess());
+    if (root.is()) {
+        rootPath = root->getAbsolutePathRepresentation();
+    }
+    OUString rel(getRelativePathRepresentation());
+    OUStringBuffer path(rootPath);
+    if (!rootPath.isEmpty() && rootPath != "/" && !rel.isEmpty()) {
+        path.append('/');
+    }
+    path.append(rel);
+    return path.makeStringAndClear();
+}
+
+OUString Access::composeHierarchicalName(
+    OUString const & aRelativeName)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    if (aRelativeName.isEmpty() || aRelativeName[0] == '/') {
+        throw css::lang::IllegalArgumentException(
+            "configmgr composeHierarchicalName inappropriate relative name",
+            static_cast< cppu::OWeakObject * >(this), -1);
+    }
+    OUStringBuffer path(getRelativePathRepresentation());
+    if (!path.isEmpty()) {
+        path.append('/');
+    }
+    path.append(aRelativeName);
+    return path.makeStringAndClear();
+}
+
+OUString Access::getName() {
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return getNameInternal();
+}
+
+void Access::setName(OUString const & aName)
+{
+    assert(thisIs(IS_ANY));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        checkFinalized();
+        Modifications localMods;
+        switch (getNode()->kind()) {
+        case Node::KIND_GROUP:
+        case Node::KIND_SET:
+            {
+                rtl::Reference< Access > parent(getParentAccess());
+                if (parent.is()) {
+                    rtl::Reference< Node > node(getNode());
+                    if (! node->getTemplateName().isEmpty()) {
+                        rtl::Reference< ChildAccess > other(
+                            parent->getChild(aName));
+                        if (other.get() == this) {
+                            break;
+                        }
+                        if (node->getMandatory() == Data::NO_LAYER &&
+                            !(other.is() && other->isFinalized()))
+                        {
+                            if (!isValidName(aName, true)) {
+                                throw css::uno::RuntimeException(
+                                    "invalid element name " + aName);
+                            }
+                            rtl::Reference< RootAccess > root(getRootAccess());
+                            rtl::Reference< ChildAccess > childAccess(
+                                static_cast< ChildAccess * >(this));
+                            localMods.add(getRelativePath());
+                            // unbind() modifies the parent chain that
+                            // markChildAsModified() walks, so order is
+                            // important:
+                            parent->markChildAsModified(childAccess);
+                                //TODO: must not throw
+                            childAccess->unbind(); // must not throw
+                            if (other.is()) {
+                                other->unbind(); // must not throw
+                            }
+                            childAccess->bind(root, parent, aName);
+                                // must not throw
+                            parent->markChildAsModified(childAccess);
+                                //TODO: must not throw
+                            localMods.add(getRelativePath());
+                            break;
+                        }
+                    }
+                }
+            }
+            [[fallthrough]];
+        case Node::KIND_LOCALIZED_PROPERTY:
+            // renaming a property could only work for an extension property,
+            // but a localized property is never an extension property
+            throw css::uno::RuntimeException(
+                "configmgr setName inappropriate node",
+                static_cast< cppu::OWeakObject * >(this));
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+css::beans::Property Access::getAsProperty()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return asProperty();
+}
+
+css::uno::Reference< css::beans::XPropertySetInfo > Access::getPropertySetInfo()
+{
+    assert(thisIs(IS_GROUP));
+    return this;
+}
+
+void Access::setPropertyValue(
+    OUString const & aPropertyName, css::uno::Any const & aValue)
+{
+    assert(thisIs(IS_GROUP));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        if (!getRootAccess()->isUpdate()) {
+            throw css::uno::RuntimeException(
+                "configmgr setPropertyValue on non-update access",
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        Modifications localMods;
+        if (!setChildProperty(aPropertyName, aValue, &localMods)) {
+            throw css::beans::UnknownPropertyException(
+                aPropertyName, static_cast< cppu::OWeakObject * >(this));
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+css::uno::Any Access::getPropertyValue(OUString const & PropertyName)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+
+    css::uno::Any value;
+    if (!getByNameFast(PropertyName, value))
+        throw css::beans::UnknownPropertyException(
+            PropertyName, static_cast< cppu::OWeakObject * >(this));
+    return value;
+}
+
+void Access::addPropertyChangeListener(
+    OUString const & aPropertyName,
+    css::uno::Reference< css::beans::XPropertyChangeListener > const &
+        xListener)
+{
+    assert(thisIs(IS_GROUP));
+    {
+        osl::MutexGuard g(*lock_);
+        if (!xListener.is()) {
+            throw css::uno::RuntimeException(
+                "null listener", static_cast< cppu::OWeakObject * >(this));
+        }
+        checkKnownProperty(aPropertyName);
+        if (!disposed_) {
+            propertyChangeListeners_[aPropertyName].insert(xListener);
+            return;
+        }
+    }
+    try {
+        xListener->disposing(
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    } catch (css::lang::DisposedException &) {}
+}
+
+void Access::removePropertyChangeListener(
+    OUString const & aPropertyName,
+    css::uno::Reference< css::beans::XPropertyChangeListener > const &
+        aListener)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    checkKnownProperty(aPropertyName);
+    PropertyChangeListeners::iterator i(
+        propertyChangeListeners_.find(aPropertyName));
+    if (i != propertyChangeListeners_.end()) {
+        PropertyChangeListenersElement::iterator j(i->second.find(aListener));
+        if (j != i->second.end()) {
+            i->second.erase(j);
+            if (i->second.empty()) {
+                propertyChangeListeners_.erase(i);
+            }
+        }
+    }
+}
+
+void Access::addVetoableChangeListener(
+    OUString const & PropertyName,
+    css::uno::Reference< css::beans::XVetoableChangeListener > const &
+        aListener)
+{
+    assert(thisIs(IS_GROUP));
+    {
+        osl::MutexGuard g(*lock_);
+        if (!aListener.is()) {
+            throw css::uno::RuntimeException(
+                "null listener", static_cast< cppu::OWeakObject * >(this));
+        }
+        checkKnownProperty(PropertyName);
+        if (!disposed_) {
+            vetoableChangeListeners_[PropertyName].insert(aListener);
+            //TODO: actually call vetoableChangeListeners_
+            return;
+        }
+    }
+    try {
+        aListener->disposing(
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    } catch (css::lang::DisposedException &) {}
+}
+
+void Access::removeVetoableChangeListener(
+    OUString const & PropertyName,
+    css::uno::Reference< css::beans::XVetoableChangeListener > const &
+        aListener)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    checkKnownProperty(PropertyName);
+    VetoableChangeListeners::iterator i(
+        vetoableChangeListeners_.find(PropertyName));
+    if (i != vetoableChangeListeners_.end()) {
+        VetoableChangeListenersElement::iterator j(i->second.find(aListener));
+        if (j != i->second.end()) {
+            i->second.erase(j);
+            if (i->second.empty()) {
+                vetoableChangeListeners_.erase(i);
+            }
+        }
+    }
+}
+
+void Access::setPropertyValues(
+    css::uno::Sequence< OUString > const & aPropertyNames,
+    css::uno::Sequence< css::uno::Any > const & aValues)
+{
+    assert(thisIs(IS_GROUP));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        if (!getRootAccess()->isUpdate()) {
+            throw css::uno::RuntimeException(
+                "configmgr setPropertyValues on non-update access",
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        if (aPropertyNames.getLength() != aValues.getLength()) {
+            throw css::lang::IllegalArgumentException(
+                ("configmgr setPropertyValues: aPropertyNames/aValues of"
+                 " different length"),
+                static_cast< cppu::OWeakObject * >(this), -1);
+        }
+        Modifications localMods;
+        for (sal_Int32 i = 0; i < aPropertyNames.getLength(); ++i) {
+            if (!setChildProperty(aPropertyNames[i], aValues[i], &localMods)) {
+                throw css::lang::IllegalArgumentException(
+                    "configmgr setPropertyValues inappropriate property name",
+                    static_cast< cppu::OWeakObject * >(this), -1);
+            }
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+css::uno::Sequence< css::uno::Any > Access::getPropertyValues(
+    css::uno::Sequence< OUString > const & aPropertyNames)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    css::uno::Sequence< css::uno::Any > vals(aPropertyNames.getLength());
+    auto aValsRange = asNonConstRange(vals);
+    for (sal_Int32 i = 0; i < aPropertyNames.getLength(); ++i)
+    {
+        if (!getByNameFast(aPropertyNames[i], aValsRange[i]))
+            throw css::uno::RuntimeException(
+                "configmgr getPropertyValues inappropriate property name",
+                static_cast< cppu::OWeakObject * >(this));
+    }
+
+    return vals;
+}
+
+void Access::addPropertiesChangeListener(
+    css::uno::Sequence< OUString > const &,
+    css::uno::Reference< css::beans::XPropertiesChangeListener > const &
+        xListener)
+{
+    assert(thisIs(IS_GROUP));
+    {
+        osl::MutexGuard g(*lock_);
+        if (!xListener.is()) {
+            throw css::uno::RuntimeException(
+                "null listener", static_cast< cppu::OWeakObject * >(this));
+        }
+        if (!disposed_) {
+            propertiesChangeListeners_.insert(xListener);
+            return;
+        }
+    }
+    try {
+        xListener->disposing(
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    } catch (css::lang::DisposedException &) {}
+}
+
+void Access::removePropertiesChangeListener(
+    css::uno::Reference< css::beans::XPropertiesChangeListener > const &
+        xListener)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    PropertiesChangeListeners::iterator i(
+        propertiesChangeListeners_.find(xListener));
+    if (i != propertiesChangeListeners_.end()) {
+        propertiesChangeListeners_.erase(i);
+    }
+}
+
+void Access::firePropertiesChangeEvent(
+    css::uno::Sequence< OUString > const & aPropertyNames,
+    css::uno::Reference< css::beans::XPropertiesChangeListener > const &
+        xListener)
+{
+    assert(thisIs(IS_GROUP));
+    css::uno::Sequence< css::beans::PropertyChangeEvent > events(
+        aPropertyNames.getLength());
+    auto aEventsRange = asNonConstRange(events);
+    for (sal_Int32 i = 0; i < events.getLength(); ++i) {
+        aEventsRange[i].Source = static_cast< cppu::OWeakObject * >(this);
+        aEventsRange[i].PropertyName = aPropertyNames[i];
+        aEventsRange[i].Further = false;
+        aEventsRange[i].PropertyHandle = -1;
+    }
+    xListener->propertiesChange(events);
+}
+
+css::uno::Reference< css::beans::XHierarchicalPropertySetInfo >
+Access::getHierarchicalPropertySetInfo() {
+    assert(thisIs(IS_GROUP));
+    return this;
+}
+
+void Access::setHierarchicalPropertyValue(
+    OUString const & aHierarchicalPropertyName,
+    css::uno::Any const & aValue)
+{
+    assert(thisIs(IS_GROUP));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        if (!getRootAccess()->isUpdate()) {
+            throw css::uno::RuntimeException(
+                "configmgr setHierarchicalPropertyName on non-update access",
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        rtl::Reference< ChildAccess > child(
+            getSubChild(aHierarchicalPropertyName));
+        if (!child.is()) {
+            throw css::beans::UnknownPropertyException(
+                aHierarchicalPropertyName,
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        child->checkFinalized();
+        Modifications localMods;
+        child->setProperty(aValue, &localMods);
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+css::uno::Any Access::getHierarchicalPropertyValue(
+    OUString const & aHierarchicalPropertyName)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    rtl::Reference< ChildAccess > child(getSubChild(aHierarchicalPropertyName));
+    if (!child.is()) {
+        throw css::beans::UnknownPropertyException(
+            aHierarchicalPropertyName,
+            static_cast< cppu::OWeakObject * >(this));
+    }
+    return child->asValue();
+}
+
+void Access::setHierarchicalPropertyValues(
+    css::uno::Sequence< OUString > const & aHierarchicalPropertyNames,
+    css::uno::Sequence< css::uno::Any > const & Values)
+{
+    assert(thisIs(IS_GROUP));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        if (!getRootAccess()->isUpdate()) {
+            throw css::uno::RuntimeException(
+                "configmgr setPropertyValues on non-update access",
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        if (aHierarchicalPropertyNames.getLength() != Values.getLength()) {
+            throw css::lang::IllegalArgumentException(
+                ("configmgr setHierarchicalPropertyValues:"
+                 " aHierarchicalPropertyNames/Values of different length"),
+                static_cast< cppu::OWeakObject * >(this), -1);
+        }
+        Modifications localMods;
+        for (sal_Int32 i = 0; i < aHierarchicalPropertyNames.getLength(); ++i) {
+            rtl::Reference< ChildAccess > child(
+                getSubChild(aHierarchicalPropertyNames[i]));
+            if (!child.is()) {
+                throw css::lang::IllegalArgumentException(
+                    ("configmgr setHierarchicalPropertyValues inappropriate"
+                     " property name"),
+                    static_cast< cppu::OWeakObject * >(this), -1);
+            }
+            child->checkFinalized();
+            child->setProperty(Values[i], &localMods);
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+css::uno::Sequence< css::uno::Any > Access::getHierarchicalPropertyValues(
+    css::uno::Sequence< OUString > const & aHierarchicalPropertyNames)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    css::uno::Sequence< css::uno::Any > vals(
+        aHierarchicalPropertyNames.getLength());
+    auto aValsRange = asNonConstRange(vals);
+    for (sal_Int32 i = 0; i < aHierarchicalPropertyNames.getLength(); ++i) {
+        rtl::Reference< ChildAccess > child(
+            getSubChild(aHierarchicalPropertyNames[i]));
+        if (!child.is()) {
+            throw css::lang::IllegalArgumentException(
+                ("configmgr getHierarchicalPropertyValues inappropriate"
+                 " hierarchical property name"),
+                static_cast< cppu::OWeakObject * >(this), -1);
+        }
+        aValsRange[i] = child->asValue();
+    }
+    return vals;
+}
+
+css::beans::Property Access::getPropertyByHierarchicalName(
+    OUString const & aHierarchicalName)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    rtl::Reference< ChildAccess > child(getSubChild(aHierarchicalName));
+    if (!child.is()) {
+        throw css::beans::UnknownPropertyException(
+            aHierarchicalName, static_cast< cppu::OWeakObject * >(this));
+    }
+    return child->asProperty();
+}
+
+sal_Bool Access::hasPropertyByHierarchicalName(
+    OUString const & aHierarchicalName)
+{
+    assert(thisIs(IS_GROUP));
+    osl::MutexGuard g(*lock_);
+    return getSubChild(aHierarchicalName).is();
+}
+
+void Access::replaceByName(
+    OUString const & aName, css::uno::Any const & aElement)
+{
+    assert(thisIs(IS_UPDATE));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        rtl::Reference< ChildAccess > child(getChild(aName));
+        if (!child.is()) {
+            throw css::container::NoSuchElementException(
+                aName, static_cast< cppu::OWeakObject * >(this));
+        }
+        child->checkFinalized();
+        Modifications localMods;
+        switch (getNode()->kind()) {
+        case Node::KIND_LOCALIZED_PROPERTY:
+        case Node::KIND_GROUP:
+            child->setProperty(aElement, &localMods);
+            break;
+        case Node::KIND_SET:
+            {
+                rtl::Reference< ChildAccess > freeAcc(
+                    getFreeSetMember(aElement));
+                rtl::Reference< RootAccess > root(getRootAccess());
+                localMods.add(child->getRelativePath());
+                child->unbind(); // must not throw
+                freeAcc->bind(root, this, aName); // must not throw
+                markChildAsModified(freeAcc); //TODO: must not throw
+            }
+            break;
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+void Access::insertByName(
+    OUString const & aName, css::uno::Any const & aElement)
+{
+    assert(thisIs(IS_EXTENSIBLE|IS_UPDATE));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        checkFinalized();
+        if (getChild(aName).is()) {
+            throw css::container::ElementExistException(
+                aName, static_cast< cppu::OWeakObject * >(this));
+        }
+        Modifications localMods;
+        switch (getNode()->kind()) {
+        case Node::KIND_LOCALIZED_PROPERTY:
+            if (!isValidName(aName, false)) {
+                throw css::lang::IllegalArgumentException(
+                    aName, static_cast<cppu::OWeakObject *>(this), 0);
+            }
+            insertLocalizedValueChild(aName, aElement, &localMods);
+            break;
+        case Node::KIND_GROUP:
+            {
+                if (!isValidName(aName, false)) {
+                    throw css::lang::IllegalArgumentException(
+                        aName, static_cast<cppu::OWeakObject *>(this), 0);
+                }
+                checkValue(aElement, TYPE_ANY, true);
+                rtl::Reference child(
+                    new ChildAccess(
+                        components_, getRootAccess(), this, aName,
+                        new PropertyNode(
+                            Data::NO_LAYER, TYPE_ANY, true, aElement, true)));
+                markChildAsModified(child);
+                localMods.add(child->getRelativePath());
+            }
+            break;
+        case Node::KIND_SET:
+            {
+                if (!isValidName(aName, true)) {
+                    throw css::lang::IllegalArgumentException(
+                        aName, static_cast<cppu::OWeakObject *>(this), 0);
+                }
+                rtl::Reference< ChildAccess > freeAcc(
+                    getFreeSetMember(aElement));
+                freeAcc->bind(getRootAccess(), this, aName); // must not throw
+                markChildAsModified(freeAcc); //TODO: must not throw
+                localMods.add(freeAcc->getRelativePath());
+            }
+            break;
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+void Access::removeByName(OUString const & aName)
+{
+    assert(thisIs(IS_EXTENSIBLE|IS_UPDATE));
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        rtl::Reference< ChildAccess > child(getChild(aName));
+        if (!child.is() || child->isFinalized() ||
+            child->getNode()->getMandatory() != Data::NO_LAYER)
+        {
+            throw css::container::NoSuchElementException(
+                aName, static_cast< cppu::OWeakObject * >(this));
+        }
+        if (getNode()->kind() == Node::KIND_GROUP) {
+            rtl::Reference< Node > p(child->getNode());
+            if (p->kind() != Node::KIND_PROPERTY ||
+                !static_cast< PropertyNode * >(p.get())->isExtension())
+            {
+                throw css::container::NoSuchElementException(
+                    aName, static_cast< cppu::OWeakObject * >(this));
+            }
+        }
+        Modifications localMods;
+        localMods.add(child->getRelativePath());
+        // unbind() modifies the parent chain that markChildAsModified() walks,
+        // so order is important:
+        markChildAsModified(child); //TODO: must not throw
+        child->unbind();
+        getNotificationRoot()->initBroadcaster(localMods.getRoot(), &bc);
+    }
+    bc.send();
+}
+
+css::uno::Reference< css::uno::XInterface > Access::createInstance()
+{
+    assert(thisIs(IS_SET|IS_UPDATE));
+    OUString tmplName(
+        static_cast< SetNode * >(getNode().get())->getDefaultTemplateName());
+    rtl::Reference< Node > tmpl(
+        components_.getTemplate(tmplName));
+    if (!tmpl.is()) {
+        throw css::uno::Exception(
+            "unknown template " + tmplName,
+            static_cast< cppu::OWeakObject * >(this));
+    }
+    rtl::Reference< Node > node(tmpl->clone(true));
+    node->setLayer(Data::NO_LAYER);
+    return static_cast< cppu::OWeakObject * >(
+        new ChildAccess(components_, getRootAccess(), node));
+}
+
+css::uno::Reference< css::uno::XInterface > Access::createInstanceWithArguments(
+    css::uno::Sequence< css::uno::Any > const & aArguments)
+{
+    assert(thisIs(IS_SET|IS_UPDATE));
+    if (aArguments.hasElements()) {
+        throw css::uno::Exception(
+            ("configuration SimpleSetUpdate createInstanceWithArguments"
+             " must not specify any arguments"),
+            static_cast< cppu::OWeakObject * >(this));
+    }
+    return createInstance();
+}
+
+Access::Access(Components & components):
+    components_(components), disposed_(false), lock_( lock() )
+{
+}
+
+Access::~Access() {}
+
+void Access::initDisposeBroadcaster(Broadcaster * broadcaster) {
+    assert(broadcaster != nullptr);
+    for (auto const& disposeListener : disposeListeners_)
+    {
+        broadcaster->addDisposeNotification(
+            disposeListener,
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    }
+    for (auto const& containerListener : containerListeners_)
+    {
+        broadcaster->addDisposeNotification(
+            containerListener,
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    }
+    for (auto const& propertyChangeListener : propertyChangeListeners_)
+    {
+        for (auto const& propertyChangeListenerElement : propertyChangeListener.second)
+        {
+            broadcaster->addDisposeNotification(
+                propertyChangeListenerElement,
+                css::lang::EventObject(
+                    static_cast< cppu::OWeakObject * >(this)));
+        }
+    }
+    for (auto const& vetoableChangeListener : vetoableChangeListeners_)
+    {
+        for (auto const& vetoableChangeListenerElement : vetoableChangeListener.second)
+        {
+            broadcaster->addDisposeNotification(
+                vetoableChangeListenerElement,
+                css::lang::EventObject(
+                    static_cast< cppu::OWeakObject * >(this)));
+        }
+    }
+    for (auto const& propertiesChangeListener : propertiesChangeListeners_)
+    {
+        broadcaster->addDisposeNotification(
+            propertiesChangeListener,
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    }
+    //TODO: iterate over children w/ listeners (incl. unmodified ones):
+    for (ModifiedChildren::iterator i(modifiedChildren_.begin());
+         i != modifiedChildren_.end(); ++i)
+    {
+        rtl::Reference< ChildAccess > child(getModifiedChild(i));
+        if (child.is()) {
+            child->initDisposeBroadcaster(broadcaster);
+        }
+    }
+}
+
+void Access::clearListeners() noexcept {
+    disposeListeners_.clear();
+    containerListeners_.clear();
+    propertyChangeListeners_.clear();
+    vetoableChangeListeners_.clear();
+    propertiesChangeListeners_.clear();
+    //TODO: iterate over children w/ listeners (incl. unmodified ones):
+    for (ModifiedChildren::iterator i(modifiedChildren_.begin());
+         i != modifiedChildren_.end(); ++i)
+    {
+        rtl::Reference< ChildAccess > child(getModifiedChild(i));
+        if (child.is()) {
+            child->clearListeners();
+        }
+    }
+}
+
+css::uno::Any Access::queryInterface(css::uno::Type const & aType)
+{
+    css::uno::Any res(OWeakObject::queryInterface(aType));
+    if (res.hasValue()) {
+        return res;
+    }
+    res = cppu::queryInterface(
+        aType, static_cast< css::lang::XTypeProvider * >(this),
+        static_cast< css::lang::XServiceInfo * >(this),
+        static_cast< css::lang::XComponent * >(this),
+        static_cast< css::container::XHierarchicalNameAccess * >(this),
+        static_cast< css::container::XContainer * >(this),
+        static_cast< css::beans::XExactName * >(this),
+        static_cast< css::container::XHierarchicalName * >(this),
+        static_cast< css::container::XNamed * >(this),
+        static_cast< css::beans::XProperty * >(this),
+        static_cast< css::container::XElementAccess * >(this),
+        static_cast< css::container::XNameAccess * >(this));
+    if (res.hasValue()) {
+        return res;
+    }
+    if (getNode()->kind() == Node::KIND_GROUP) {
+        res = cppu::queryInterface(
+            aType, static_cast< css::beans::XPropertySetInfo * >(this),
+            static_cast< css::beans::XPropertySet * >(this),
+            static_cast< css::beans::XMultiPropertySet * >(this),
+            static_cast< css::beans::XHierarchicalPropertySet * >(this),
+            static_cast< css::beans::XMultiHierarchicalPropertySet * >(this),
+            static_cast< css::beans::XHierarchicalPropertySetInfo * >(this));
+        if (res.hasValue()) {
+            return res;
+        }
+    }
+    if (getRootAccess()->isUpdate()) {
+        res = cppu::queryInterface(
+            aType, static_cast< css::container::XNameReplace * >(this),
+            static_cast< css::container::XHierarchicalNameReplace * >(this));
+        if (res.hasValue()) {
+            return res;
+        }
+        if (getNode()->kind() != Node::KIND_GROUP ||
+            static_cast< GroupNode * >(getNode().get())->isExtensible())
+        {
+            res = cppu::queryInterface(
+                aType, static_cast< css::container::XNameContainer * >(this));
+            if (res.hasValue()) {
+                return res;
+            }
+        }
+        if (getNode()->kind() == Node::KIND_SET) {
+            res = cppu::queryInterface(
+                aType, static_cast< css::lang::XSingleServiceFactory * >(this));
+        }
+    }
+    return res;
+}
+
+
+void Access::checkLocalizedPropertyAccess() {
+    if (getNode()->kind() == Node::KIND_LOCALIZED_PROPERTY &&
+        !Components::allLocales(getRootAccess()->getLocale()))
+    {
+        throw css::uno::RuntimeException(
+            "configmgr Access to specialized LocalizedPropertyNode",
+            static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+rtl::Reference< Node > Access::getParentNode() {
+    rtl::Reference< Access > parent(getParentAccess());
+    return parent.is() ? parent->getNode() : rtl::Reference< Node >();
+}
+
+rtl::Reference< ChildAccess > Access::getChild(OUString const & name) {
+    OUString locale;
+    if (getNode()->kind() == Node::KIND_LOCALIZED_PROPERTY
+        && name.startsWith("*", &locale))
+    {
+        if (locale.startsWith("*")) {
+            SAL_WARN(
+                "configmgr",
+                ("access best-matching localized property value via"
+                 " \"*<locale>\" with <locale> \"")
+                    << locale << "\" recursively starting with \"*\"");
+            return getChild(locale);
+        }
+        SAL_WARN_IF(
+            locale.isEmpty(), "configmgr",
+            ("access best-matching localized property value via \"*<locale>\""
+             " with empty <locale>; falling back to defaults"));
+
+        // Since the locale given to us is the one used at initialization,
+        // here we override it with the actual current-user's language to
+        // support per-view localization in LOK.
+        if (comphelper::LibreOfficeKit::isActive())
+            locale = comphelper::LibreOfficeKit::getLanguageTag().getBcp47();
+
+        if (!locale.isEmpty()) {
+            // Try exact match first, avoiding all fallback overhead.
+            rtl::Reference<ChildAccess> directChild(getChild(locale));
+            if (directChild.is())
+                return directChild;
+
+            // Find the best match using the LanguageTag fallback mechanism,
+            // excluding the original tag.
+            std::vector<OUString> aFallbacks = LanguageTag(locale).getFallbackStrings(false);
+            for (const OUString& rFallback : aFallbacks)
+            {
+                rtl::Reference<ChildAccess> child(getChild(rFallback));
+                if (child.is())
+                    return child;
+            }
+
+            // As a workaround for broken xcu data that does not use shortest
+            // xml:lang attributes, look for the first entry with the same first
+            // segment as the requested language tag before falling back to
+            // defaults (see fdo#33638):
+            if (aFallbacks.size() > 0)
+                locale = aFallbacks[aFallbacks.size() - 1];
+            assert(
+                !locale.isEmpty() && locale.indexOf('-') == -1 &&
+                locale.indexOf('_') == -1);
+
+            std::vector< rtl::Reference< ChildAccess > > children(
+                getAllChildren());
+            for (auto const& child : children)
+            {
+                const OUString & name2(child->getNameInternal());
+                if (name2.startsWith(locale) &&
+                    (name2.getLength() == locale.getLength() ||
+                     name2[locale.getLength()] == '-' ||
+                     name2[locale.getLength()] == '_'))
+                {
+                    return child;
+                }
+            }
+        }
+        // Defaults are the "en-US" locale, the "en" locale, the empty string locale, the first child (if
+        // any, and if the property is non-nillable), or a null ChildAccess, in that order:
+        rtl::Reference< ChildAccess > child(getChild("en-US"));
+        if (child.is()) {
+            return child;
+        }
+        child = getChild("en");
+        if (child.is()) {
+            return child;
+        }
+        child = getChild("");
+        if (child.is()) {
+            return child;
+        }
+        if (!static_cast<LocalizedPropertyNode *>(getNode().get())->isNillable()) {
+            std::vector< rtl::Reference< ChildAccess > > children(getAllChildren());
+            if (!children.empty()) {
+                return children.front();
+            }
+        }
+        return rtl::Reference< ChildAccess >();
+    }
+    ModifiedChildren::iterator i(modifiedChildren_.find(name));
+    return i == modifiedChildren_.end()
+        ? getUnmodifiedChild(name) : getModifiedChild(i);
+}
+
+std::vector< rtl::Reference< ChildAccess > > Access::getAllChildren() {
+    std::vector< rtl::Reference< ChildAccess > > vec;
+    NodeMap const & members = getNode()->getMembers();
+    for (auto const& member : members)
+    {
+        if (modifiedChildren_.find(member.first) == modifiedChildren_.end()) {
+            vec.push_back(getUnmodifiedChild(member.first));
+            assert(vec.back().is());
+        }
+    }
+    for (ModifiedChildren::iterator i(modifiedChildren_.begin());
+         i != modifiedChildren_.end(); ++i)
+    {
+        rtl::Reference< ChildAccess > child(getModifiedChild(i));
+        if (child.is()) {
+            vec.push_back(child);
+        }
+    }
+    return vec;
+}
+
+void Access::checkValue(css::uno::Any const & value, Type type, bool nillable) {
+    bool ok;
+    switch (type) {
+    case TYPE_ERROR:
+        ok = false;
+        break;
+    case TYPE_ANY:
+        switch (getDynamicType(value)) {
+        case TYPE_ERROR:
+            ok = false;
+            break;
+        case TYPE_NIL:
+            ok = nillable;
+            break;
+        default:
+            ok = true;
+            break;
+        case TYPE_ANY:
+            for (;;) std::abort(); // cannot happen
+        }
+        break;
+    default:
+        ok = value.hasValue() ? value.isExtractableTo(mapType(type)) : nillable;
+        break;
+    case TYPE_NIL:
+        for (;;) std::abort(); // cannot happen
+    }
+    if (!ok) {
+        throw css::lang::IllegalArgumentException(
+            "configmgr inappropriate property value",
+            static_cast< cppu::OWeakObject * >(this), -1);
+    }
+}
+
+void Access::insertLocalizedValueChild(
+    OUString const & name, css::uno::Any const & value,
+    Modifications * localModifications)
+{
+    assert(localModifications != nullptr);
+    LocalizedPropertyNode * locprop = static_cast< LocalizedPropertyNode * >(
+        getNode().get());
+    checkValue(value, locprop->getStaticType(), locprop->isNillable());
+    rtl::Reference child(
+        new ChildAccess(
+            components_, getRootAccess(), this, name,
+            new LocalizedValueNode(Data::NO_LAYER, value)));
+    markChildAsModified(child);
+    localModifications->add(child->getRelativePath());
+}
+
+void Access::reportChildChanges(
+    std::vector< css::util::ElementChange > * changes)
+{
+    assert(changes != nullptr);
+    for (ModifiedChildren::iterator i(modifiedChildren_.begin());
+         i != modifiedChildren_.end(); ++i)
+    {
+        rtl::Reference< ChildAccess > child(getModifiedChild(i));
+        if (child.is()) {
+            child->reportChildChanges(changes);
+            changes->push_back(css::util::ElementChange());
+                //TODO: changed value and/or inserted node
+        } else {
+            changes->push_back(css::util::ElementChange()); //TODO: removed node
+        }
+    }
+}
+
+void Access::commitChildChanges(
+    bool valid, Modifications * globalModifications)
+{
+    assert(globalModifications != nullptr);
+    while (!modifiedChildren_.empty()) {
+        bool childValid = valid;
+        ModifiedChildren::iterator i(modifiedChildren_.begin());
+        rtl::Reference< ChildAccess > child(getModifiedChild(i));
+        if (child.is()) {
+            childValid = childValid && !child->isFinalized();
+            child->commitChanges(childValid, globalModifications);
+                //TODO: currently, this is called here for directly inserted
+                // children as well as for children whose sub-children were
+                // modified (and should never be called for directly removed
+                // children); clarify what exactly should happen here for
+                // directly inserted children
+        }
+        NodeMap & members = getNode()->getMembers();
+        NodeMap::iterator j(members.find(i->first));
+        if (child.is()) {
+            // Inserted:
+            if (j != members.end()) {
+                childValid = childValid &&
+                    j->second->getFinalized() == Data::NO_LAYER;
+                if (childValid) {
+                    child->getNode()->setMandatory(j->second->getMandatory());
+                }
+            }
+            if (childValid) {
+                members[i->first] = child->getNode();
+            }
+        } else {
+            // Removed:
+            childValid = childValid && j != members.end() &&
+                j->second->getFinalized() == Data::NO_LAYER &&
+                j->second->getMandatory() == Data::NO_LAYER;
+            if (childValid) {
+                members.erase(j);
+            }
+        }
+        if (childValid && i->second.directlyModified) {
+            std::vector<OUString> path(getAbsolutePath());
+            path.push_back(i->first);
+            components_.addModification(path);
+            globalModifications->add(path);
+        }
+        i->second.child->committed();
+        modifiedChildren_.erase(i);
+    }
+}
+
+void Access::initBroadcasterAndChanges(
+    Modifications::Node const & modifications, Broadcaster * broadcaster,
+    std::vector< css::util::ElementChange > * allChanges)
+{
+    assert(broadcaster != nullptr);
+    std::vector< css::beans::PropertyChangeEvent > propChanges;
+    bool collectPropChanges = !propertiesChangeListeners_.empty();
+    for (const auto & i : modifications.children)
+    {
+        rtl::Reference< ChildAccess > child(getChild(i.first));
+        if (child.is()) {
+            switch (child->getNode()->kind()) {
+            case Node::KIND_LOCALIZED_PROPERTY:
+                if (!i.second.children.empty()) {
+                    if (Components::allLocales(getRootAccess()->getLocale())) {
+                        child->initBroadcasterAndChanges(
+                            i.second, broadcaster, allChanges);
+                            //TODO: if allChanges==0, recurse only into children
+                            // w/ listeners
+                    } else {
+                        //TODO: filter child mods that are irrelevant for
+                        // locale:
+                        for (auto const& containerListener : containerListeners_)
+                        {
+                            broadcaster->
+                                addContainerElementReplacedNotification(
+                                    containerListener,
+                                    css::container::ContainerEvent(
+                                        static_cast< cppu::OWeakObject * >(
+                                            this),
+                                        css::uno::Any(i.first),
+                                        css::uno::Any(), css::uno::Any()));
+                                //TODO: non-void Element, ReplacedElement
+                        }
+                        PropertyChangeListeners::iterator j(
+                            propertyChangeListeners_.find(i.first));
+                        if (j != propertyChangeListeners_.end()) {
+                            for (auto const& propertyChangeListenerElement : j->second)
+                            {
+                                broadcaster->addPropertyChangeNotification(
+                                    propertyChangeListenerElement,
+                                    css::beans::PropertyChangeEvent(
+                                        static_cast< cppu::OWeakObject * >(
+                                            this),
+                                        i.first, false, -1, css::uno::Any(),
+                                        css::uno::Any()));
+                            }
+                        }
+                        j = propertyChangeListeners_.find("");
+                        if (j != propertyChangeListeners_.end()) {
+                            for (auto const& propertyChangeListenerElement : j->second)
+                            {
+                                broadcaster->addPropertyChangeNotification(
+                                    propertyChangeListenerElement,
+                                    css::beans::PropertyChangeEvent(
+                                        static_cast< cppu::OWeakObject * >(
+                                            this),
+                                        i.first, false, -1, css::uno::Any(),
+                                        css::uno::Any()));
+                            }
+                        }
+                        if (allChanges != nullptr) {
+                            allChanges->push_back(
+                                css::util::ElementChange(
+                                    css::uno::Any(
+                                        child->getRelativePathRepresentation()),
+                                    css::uno::Any(), css::uno::Any()));
+                                //TODO: non-void Element, ReplacedElement
+                        }
+                        if (collectPropChanges) {
+                            propChanges.emplace_back(
+                                    static_cast< cppu::OWeakObject * >(this),
+                                    i.first, false, -1, css::uno::Any(),
+                                    css::uno::Any());
+                        }
+                    }
+                }
+                // else: spurious Modifications::Node not representing a change
+                break;
+            case Node::KIND_LOCALIZED_VALUE:
+                assert(Components::allLocales(getRootAccess()->getLocale()));
+                for (auto const& containerListener : containerListeners_)
+                {
+                    broadcaster->addContainerElementReplacedNotification(
+                        containerListener,
+                        css::container::ContainerEvent(
+                            static_cast< cppu::OWeakObject * >(this),
+                            css::uno::Any(i.first), child->asValue(),
+                            css::uno::Any()));
+                        //TODO: distinguish add/modify; non-void ReplacedElement
+                }
+                if (allChanges != nullptr) {
+                    allChanges->push_back(
+                        css::util::ElementChange(
+                            css::uno::Any(
+                                child->getRelativePathRepresentation()),
+                            child->asValue(), css::uno::Any()));
+                        //TODO: non-void ReplacedElement
+                }
+                assert(!collectPropChanges);
+                break;
+            case Node::KIND_PROPERTY:
+                {
+                    for (auto const& containerListener : containerListeners_)
+                    {
+                        broadcaster->addContainerElementReplacedNotification(
+                            containerListener,
+                            css::container::ContainerEvent(
+                                static_cast< cppu::OWeakObject * >(this),
+                                css::uno::Any(i.first), child->asValue(),
+                                css::uno::Any()));
+                            //TODO: distinguish add/remove/modify; non-void
+                            // ReplacedElement
+                    }
+                    PropertyChangeListeners::iterator j(
+                        propertyChangeListeners_.find(i.first));
+                    if (j != propertyChangeListeners_.end()) {
+                        for (auto const& propertyChangeListenerElement : j->second)
+                        {
+                            broadcaster->addPropertyChangeNotification(
+                                propertyChangeListenerElement,
+                                css::beans::PropertyChangeEvent(
+                                    static_cast< cppu::OWeakObject * >(this),
+                                    i.first, false, -1, css::uno::Any(),
+                                    css::uno::Any()));
+                        }
+                    }
+                    j = propertyChangeListeners_.find("");
+                    if (j != propertyChangeListeners_.end()) {
+                        for (auto const& propertyChangeListenerElement : j->second)
+                        {
+                            broadcaster->addPropertyChangeNotification(
+                                propertyChangeListenerElement,
+                                css::beans::PropertyChangeEvent(
+                                    static_cast< cppu::OWeakObject * >(this),
+                                    i.first, false, -1, css::uno::Any(),
+                                    css::uno::Any()));
+                        }
+                    }
+                    if (allChanges != nullptr) {
+                        allChanges->push_back(
+                            css::util::ElementChange(
+                                css::uno::Any(
+                                    child->getRelativePathRepresentation()),
+                                child->asValue(), css::uno::Any()));
+                            //TODO: non-void ReplacedElement
+                    }
+                    if (collectPropChanges) {
+                        propChanges.emplace_back(
+                                static_cast< cppu::OWeakObject * >(this),
+                                i.first, false, -1, css::uno::Any(),
+                                css::uno::Any());
+                    }
+                }
+                break;
+            case Node::KIND_GROUP:
+            case Node::KIND_SET:
+                if (i.second.children.empty()) {
+                    if (!child->getNode()->getTemplateName().isEmpty()) {
+                        for (auto const& containerListener : containerListeners_)
+                        {
+                            broadcaster->
+                                addContainerElementInsertedNotification(
+                                    containerListener,
+                                    css::container::ContainerEvent(
+                                        static_cast< cppu::OWeakObject * >(
+                                            this),
+                                        css::uno::Any(i.first),
+                                        child->asValue(), css::uno::Any()));
+                        }
+                        if (allChanges != nullptr) {
+                            allChanges->push_back(
+                                css::util::ElementChange(
+                                    css::uno::Any(
+                                        child->getRelativePathRepresentation()),
+                                    css::uno::Any(), css::uno::Any()));
+                                //TODO: non-void Element, ReplacedElement
+                        }
+                    }
+                    // else: spurious Modifications::Node not representing a
+                    // change
+                } else {
+                    child->initBroadcasterAndChanges(
+                        i.second, broadcaster, allChanges);
+                        //TODO: if allChanges==0, recurse only into children w/
+                        // listeners
+                }
+                break;
+            case Node::KIND_ROOT:
+                assert(false); // this cannot happen
+                break;
+            }
+        } else {
+            switch (getNode()->kind()) {
+            case Node::KIND_LOCALIZED_PROPERTY:
+                // Removed localized property value:
+                assert(Components::allLocales(getRootAccess()->getLocale()));
+                for (auto const& containerListener : containerListeners_)
+                {
+                    broadcaster->addContainerElementRemovedNotification(
+                        containerListener,
+                        css::container::ContainerEvent(
+                            static_cast< cppu::OWeakObject * >(this),
+                            css::uno::Any(i.first), css::uno::Any(),
+                            css::uno::Any()));
+                        //TODO: non-void ReplacedElement
+                }
+                if (allChanges != nullptr) {
+                    OUStringBuffer path(getRelativePathRepresentation());
+                    if (!path.isEmpty()) {
+                        path.append('/');
+                    }
+                    path.append(Data::createSegment(u"*", i.first));
+                    allChanges->push_back(
+                        css::util::ElementChange(
+                            css::uno::Any(path.makeStringAndClear()),
+                            css::uno::Any(), css::uno::Any()));
+                        //TODO: non-void ReplacedElement
+                }
+                assert(!collectPropChanges);
+                break;
+            case Node::KIND_GROUP:
+                {
+                    // Removed (non-localized) extension property:
+                    for (auto const& containerListener : containerListeners_)
+                    {
+                        broadcaster->addContainerElementRemovedNotification(
+                            containerListener,
+                            css::container::ContainerEvent(
+                                static_cast< cppu::OWeakObject * >(this),
+                                css::uno::Any(i.first), css::uno::Any(),
+                                css::uno::Any()));
+                            //TODO: non-void ReplacedElement
+                    }
+                    PropertyChangeListeners::iterator j(
+                        propertyChangeListeners_.find(i.first));
+                    if (j != propertyChangeListeners_.end()) {
+                        for (auto const& propertyChangeListenerElement : j->second)
+                        {
+                            broadcaster->addPropertyChangeNotification(
+                                propertyChangeListenerElement,
+                                css::beans::PropertyChangeEvent(
+                                    static_cast< cppu::OWeakObject * >(this),
+                                    i.first, false, -1, css::uno::Any(),
+                                    css::uno::Any()));
+                        }
+                    }
+                    j = propertyChangeListeners_.find("");
+                    if (j != propertyChangeListeners_.end()) {
+                        for (auto const& propertyChangeListenerElement : j->second)
+                        {
+                            broadcaster->addPropertyChangeNotification(
+                                propertyChangeListenerElement,
+                                css::beans::PropertyChangeEvent(
+                                    static_cast< cppu::OWeakObject * >(this),
+                                    i.first, false, -1, css::uno::Any(),
+                                    css::uno::Any()));
+                        }
+                    }
+                    if (allChanges != nullptr) {
+                        OUStringBuffer path(
+                            getRelativePathRepresentation());
+                        if (!path.isEmpty()) {
+                            path.append('/');
+                        }
+                        path.append(i.first);
+                        allChanges->push_back(
+                            css::util::ElementChange(
+                                css::uno::Any(path.makeStringAndClear()),
+                                css::uno::Any(), css::uno::Any()));
+                            //TODO: non-void ReplacedElement
+                    }
+                    if (collectPropChanges) {
+                        propChanges.emplace_back(
+                                static_cast< cppu::OWeakObject * >(this),
+                                i.first, false, -1, css::uno::Any(),
+                                css::uno::Any());
+                    }
+                }
+                break;
+            case Node::KIND_SET:
+                // Removed set member:
+                if (i.second.children.empty()) {
+                    for (auto const& containerListener : containerListeners_)
+                    {
+                        broadcaster->addContainerElementRemovedNotification(
+                            containerListener,
+                            css::container::ContainerEvent(
+                                static_cast< cppu::OWeakObject * >(this),
+                                css::uno::Any(i.first),
+                                css::uno::Any(), css::uno::Any()));
+                            //TODO: non-void ReplacedElement
+                    }
+                    if (allChanges != nullptr) {
+                        OUStringBuffer path(
+                            getRelativePathRepresentation());
+                        if (!path.isEmpty()) {
+                            path.append('/');
+                        }
+                        path.append(Data::createSegment(u"*", i.first));
+                        allChanges->push_back(
+                            css::util::ElementChange(
+                                css::uno::Any(path.makeStringAndClear()),
+                                css::uno::Any(), css::uno::Any()));
+                            //TODO: non-void ReplacedElement
+                    }
+                }
+                // else: spurious Modifications::Node not representing a change
+                break;
+            default:
+                assert(false); // this cannot happen
+                break;
+            }
+        }
+    }
+    if (!propChanges.empty()) {
+        css::uno::Sequence< css::beans::PropertyChangeEvent > seq(
+            comphelper::containerToSequence(propChanges));
+        for (auto const& propertyChangeListener : propertiesChangeListeners_)
+        {
+            broadcaster->addPropertiesChangeNotification(propertyChangeListener, seq);
+        }
+    }
+}
+
+
+Access::ModifiedChild::ModifiedChild():
+    directlyModified(false)
+{}
+
+Access::ModifiedChild::ModifiedChild(
+    rtl::Reference< ChildAccess > theChild, bool theDirectlyModified):
+    child(std::move(theChild)), directlyModified(theDirectlyModified)
+{}
+
+rtl::Reference< ChildAccess > Access::getModifiedChild(
+    ModifiedChildren::iterator const & childIterator)
+{
+    return (childIterator->second.child->getParentAccess() == this &&
+            (childIterator->second.child->getNameInternal() ==
+             childIterator->first))
+        ? childIterator->second.child : rtl::Reference< ChildAccess >();
+}
+
+rtl::Reference< ChildAccess > Access::createUnmodifiedChild(
+                const OUString &name, const rtl::Reference< Node > &node)
+{
+    rtl::Reference child(
+        new ChildAccess(components_, getRootAccess(), this, name, node));
+    cachedChildren_[name] = child.get();
+    return child;
+}
+
+rtl::Reference< ChildAccess > Access::getUnmodifiedChild(
+    OUString const & name)
+{
+    assert(modifiedChildren_.find(name) == modifiedChildren_.end());
+    rtl::Reference< Node > node(getNode()->getMember(name));
+    if (!node.is()) {
+        return rtl::Reference< ChildAccess >();
+    }
+    WeakChildMap::iterator i(cachedChildren_.find(name));
+    if (i != cachedChildren_.end()) {
+        rtl::Reference< ChildAccess > child;
+        if (i->second->acquireCounting() > 1) {
+            child.set(i->second); // must not throw
+        }
+        i->second->releaseNondeleting();
+        if (child.is()) {
+            child->setNode(node);
+            return child;
+        }
+    }
+    return createUnmodifiedChild(name,node);
+}
+
+rtl::Reference< ChildAccess > Access::getSubChild(OUString const & path) {
+    sal_Int32 i = 0;
+    // For backwards compatibility, allow absolute paths where meaningful:
+    if( path.startsWith("/") ) {
+        ++i;
+        if (!getRootAccess().is()) {
+            return rtl::Reference< ChildAccess >();
+        }
+        std::vector<OUString> abs(getAbsolutePath());
+        for (auto const& elem : abs)
+        {
+            OUString name1;
+            bool setElement1;
+            OUString templateName1;
+            i = Data::parseSegment(
+                path, i, &name1, &setElement1, &templateName1);
+            if (i == -1 || (i != path.getLength() && path[i] != '/')) {
+                return rtl::Reference< ChildAccess >();
+            }
+            OUString name2;
+            bool setElement2;
+            OUString templateName2;
+            Data::parseSegment(elem, 0, &name2, &setElement2, &templateName2);
+            if (name1 != name2 || setElement1 != setElement2 ||
+                (setElement1 &&
+                 !Data::equalTemplateNames(templateName1, templateName2)))
+            {
+                return rtl::Reference< ChildAccess >();
+            }
+            if (i != path.getLength()) {
+                ++i;
+            }
+        }
+    }
+    for (rtl::Reference< Access > parent(this);;) {
+        OUString name;
+        bool setElement;
+        OUString templateName;
+        i = Data::parseSegment(path, i, &name, &setElement, &templateName);
+        if (i == -1 || (i != path.getLength() && path[i] != '/')) {
+            return rtl::Reference< ChildAccess >();
+        }
+        rtl::Reference< ChildAccess > child(parent->getChild(name));
+        if (!child.is()) {
+            return rtl::Reference< ChildAccess >();
+        }
+        if (setElement) {
+            rtl::Reference< Node > p(parent->getNode());
+            switch (p->kind()) {
+            case Node::KIND_LOCALIZED_PROPERTY:
+                if (!Components::allLocales(getRootAccess()->getLocale()) ||
+                    !templateName.isEmpty())
+                {
+                    return rtl::Reference< ChildAccess >();
+                }
+                break;
+            case Node::KIND_SET:
+                if (!templateName.isEmpty() &&
+                    !static_cast< SetNode * >(p.get())->isValidTemplate(
+                        templateName))
+                {
+                    return rtl::Reference< ChildAccess >();
+                }
+                break;
+            default:
+                return rtl::Reference< ChildAccess >();
+            }
+        }
+        // For backwards compatibility, ignore a final slash after non-value
+        // nodes:
+        if (child->isValue()) {
+            return i == path.getLength()
+                ? child : rtl::Reference< ChildAccess >();
+        } else if (i >= path.getLength() - 1) {
+            return child;
+        }
+        ++i;
+        parent = child.get();
+    }
+}
+
+bool Access::setChildProperty(
+    OUString const & name, css::uno::Any const & value,
+    Modifications * localModifications)
+{
+    assert(localModifications != nullptr);
+    rtl::Reference< ChildAccess > child(getChild(name));
+    if (!child.is()) {
+        return false;
+    }
+    child->checkFinalized();
+    child->setProperty(value, localModifications);
+    return true;
+}
+
+css::beans::Property Access::asProperty() {
+    css::uno::Type type;
+    bool nillable;
+    bool removable;
+    rtl::Reference< Node > p(getNode());
+    switch (p->kind()) {
+    case Node::KIND_PROPERTY:
+        {
+            PropertyNode * prop = static_cast< PropertyNode * >(p.get());
+            type = mapType(prop->getStaticType());
+            nillable = prop->isNillable();
+            removable = prop->isExtension();
+        }
+        break;
+    case Node::KIND_LOCALIZED_PROPERTY:
+        {
+            LocalizedPropertyNode * locprop =
+                static_cast< LocalizedPropertyNode *>(p.get());
+            if (Components::allLocales(getRootAccess()->getLocale())) {
+                type = cppu::UnoType< css::uno::XInterface >::get();
+                    //TODO: correct?
+                removable = false;
+            } else {
+                type = mapType(locprop->getStaticType());
+                removable = false; //TODO ???
+            }
+            nillable = locprop->isNillable();
+        }
+        break;
+    case Node::KIND_LOCALIZED_VALUE:
+        {
+            LocalizedPropertyNode * locprop =
+                static_cast< LocalizedPropertyNode * >(getParentNode().get());
+            type = mapType(locprop->getStaticType());
+            nillable = locprop->isNillable();
+            removable = false; //TODO ???
+        }
+        break;
+    default:
+        type = cppu::UnoType< css::uno::XInterface >::get(); //TODO: correct?
+        nillable = false;
+        rtl::Reference< Node > parent(getParentNode());
+        removable = parent.is() && parent->kind() == Node::KIND_SET;
+        break;
+    }
+    return css::beans::Property(
+        getNameInternal(), -1, type,
+        (css::beans::PropertyAttribute::BOUND | //TODO: correct for group/set?
+         css::beans::PropertyAttribute::CONSTRAINED |
+         (nillable ? css::beans::PropertyAttribute::MAYBEVOID : 0) |
+         (getRootAccess()->isUpdate() && removable
+          ? css::beans::PropertyAttribute::REMOVABLE : 0) |
+         (!getRootAccess()->isUpdate() || p->getFinalized() != Data::NO_LAYER
+          ? css::beans::PropertyAttribute::READONLY : 0))); //TODO: MAYBEDEFAULT
+}
+
+void Access::checkFinalized() {
+    if (isFinalized()) {
+        throw css::lang::IllegalArgumentException(
+            "configmgr modification of finalized item",
+            static_cast< cppu::OWeakObject * >(this), -1);
+    }
+}
+
+void Access::checkKnownProperty(OUString const & descriptor) {
+    if (descriptor.isEmpty()) {
+        return;
+    }
+    rtl::Reference< ChildAccess > child(getChild(descriptor));
+    if (child.is()) {
+        switch (child->getNode()->kind()) {
+        case Node::KIND_PROPERTY:
+            return;
+        case Node::KIND_LOCALIZED_PROPERTY:
+            if (!Components::allLocales(getRootAccess()->getLocale())) {
+                return;
+            }
+            break;
+        case Node::KIND_LOCALIZED_VALUE:
+            if (Components::allLocales(getRootAccess()->getLocale())) {
+                return;
+            }
+            break;
+        default:
+            break;
+        }
+    }
+    throw css::beans::UnknownPropertyException(
+        descriptor, static_cast< cppu::OWeakObject * >(this));
+}
+
+rtl::Reference< ChildAccess > Access::getFreeSetMember(
+    css::uno::Any const & value)
+{
+    rtl::Reference< ChildAccess > freeAcc = comphelper::getFromUnoTunnel<ChildAccess>(value);
+    if (!freeAcc.is() || freeAcc->getParentAccess().is() ||
+        (freeAcc->isInTransaction() &&
+         freeAcc->getRootAccess() != getRootAccess()))
+    {
+        throw css::lang::IllegalArgumentException(
+            "configmgr inappropriate set element",
+            static_cast< cppu::OWeakObject * >(this), 1);
+    }
+    assert(dynamic_cast< SetNode * >(getNode().get()) != nullptr);
+    if (!static_cast< SetNode * >(getNode().get())->isValidTemplate(
+            freeAcc->getNode()->getTemplateName()))
+    {
+        throw css::lang::IllegalArgumentException(
+            "configmgr inappropriate set element",
+            static_cast< cppu::OWeakObject * >(this), 1);
+    }
+    return freeAcc;
+}
+
+rtl::Reference< Access > Access::getNotificationRoot() {
+    for (rtl::Reference< Access > p(this);;) {
+        rtl::Reference< Access > parent(p->getParentAccess());
+        if (!parent.is()) {
+            return p;
+        }
+        p = parent;
+    }
+}
+
+#if !defined NDEBUG
+bool Access::thisIs(int what) {
+    osl::MutexGuard g(*lock_);
+    rtl::Reference< Node > p(getNode());
+    Node::Kind k(p->kind());
+    return (k != Node::KIND_PROPERTY && k != Node::KIND_LOCALIZED_VALUE &&
+        ((what & IS_GROUP) == 0 || k == Node::KIND_GROUP) &&
+        ((what & IS_SET) == 0 || k == Node::KIND_SET) &&
+        ((what & IS_EXTENSIBLE) == 0 || k != Node::KIND_GROUP ||
+         static_cast< GroupNode * >(p.get())->isExtensible()) &&
+        ((what & IS_GROUP_MEMBER) == 0 ||
+         getParentNode()->kind() == Node::KIND_GROUP)) ||
+        ((what & IS_SET_MEMBER) == 0 ||
+         getParentNode()->kind() == Node::KIND_SET) ||
+        ((what & IS_UPDATE) == 0 || getRootAccess()->isUpdate());
+}
+#endif
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/access.hxx b/configmgr/source/access.hxx
new file mode 100644
index 000000000..51e43d5bc
--- /dev/null
+++ b/configmgr/source/access.hxx
@@ -0,0 +1,450 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+#include <vector>
+#include "config_map.hxx"
+
+#include <com/sun/star/beans/XExactName.hpp>
+#include <com/sun/star/beans/XHierarchicalPropertySet.hpp>
+#include <com/sun/star/beans/XHierarchicalPropertySetInfo.hpp>
+#include <com/sun/star/beans/XMultiHierarchicalPropertySet.hpp>
+#include <com/sun/star/beans/XMultiPropertySet.hpp>
+#include <com/sun/star/beans/XProperty.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/container/XContainer.hpp>
+#include <com/sun/star/container/XHierarchicalName.hpp>
+#include <com/sun/star/container/XHierarchicalNameReplace.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/XTypeProvider.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/interlck.h>
+#include <rtl/ref.hxx>
+#include <sal/types.h>
+
+#include "modifications.hxx"
+#include "type.hxx"
+
+namespace com::sun::star {
+    namespace beans {
+        class XHierarchicalPropertySetInfo;
+        class XPropertiesChangeListener;
+        class XPropertyChangeListener;
+        class XVetoableChangeListener;
+        struct Property;
+    }
+    namespace container { class XContainerListener; }
+    namespace lang { class XEventListener; }
+    namespace uno {
+        class Any;
+        class Type;
+        class XInterface;
+    }
+    namespace util { struct ElementChange; }
+}
+
+namespace configmgr {
+
+class Broadcaster;
+class ChildAccess;
+class Components;
+class Node;
+class RootAccess;
+
+class Access:
+    public cppu::OWeakObject, public css::lang::XTypeProvider,
+    public css::lang::XServiceInfo,
+    public css::lang::XComponent,
+    public css::container::XHierarchicalNameReplace,
+    public css::container::XContainer,
+    public css::beans::XExactName,
+    public css::beans::XPropertySetInfo,
+    public css::container::XHierarchicalName,
+    public css::container::XNamed,
+    public css::beans::XProperty,
+    public css::beans::XPropertySet,
+    public css::beans::XMultiPropertySet,
+    public css::beans::XHierarchicalPropertySet,
+    public css::beans::XMultiHierarchicalPropertySet,
+    public css::beans::XHierarchicalPropertySetInfo,
+    public css::container::XNameContainer,
+    public css::lang::XSingleServiceFactory
+{
+public:
+    oslInterlockedCount acquireCounting();
+
+    void releaseNondeleting();
+
+    bool isValue();
+
+    void markChildAsModified(rtl::Reference< ChildAccess > const & child);
+    void releaseChild(OUString const & name);
+
+    virtual std::vector<OUString> getAbsolutePath() = 0;
+    virtual std::vector<OUString> getRelativePath() = 0;
+
+    virtual OUString getRelativePathRepresentation() = 0;
+    virtual rtl::Reference< Node > getNode() = 0;
+
+    virtual bool isFinalized() = 0;
+
+    virtual void initBroadcaster(
+        Modifications::Node const & modifications, Broadcaster * broadcaster);
+
+    using OWeakObject::acquire;
+    using OWeakObject::release;
+
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL
+    getTypes() override;
+
+    virtual css::uno::Sequence< sal_Int8 > SAL_CALL
+    getImplementationId() override;
+
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override;
+
+    virtual void SAL_CALL dispose() override;
+
+    virtual void SAL_CALL addEventListener(
+        css::uno::Reference< css::lang::XEventListener >
+            const & xListener) override;
+
+    virtual void SAL_CALL removeEventListener(
+        css::uno::Reference< css::lang::XEventListener >
+            const & aListener) override;
+
+    virtual css::uno::Type SAL_CALL getElementType() override;
+
+    virtual sal_Bool SAL_CALL hasElements() override;
+
+    virtual css::uno::Any SAL_CALL getByName(
+        OUString const & aName) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getElementNames() override;
+
+    virtual sal_Bool SAL_CALL hasByName(OUString const & aName) override;
+
+    virtual css::uno::Any SAL_CALL getByHierarchicalName(
+        OUString const & aName) override;
+
+    virtual sal_Bool SAL_CALL hasByHierarchicalName(OUString const & aName) override;
+
+    virtual void SAL_CALL replaceByHierarchicalName(
+        OUString const & aName, css::uno::Any const & aElement) override;
+
+    virtual void SAL_CALL addContainerListener(
+        css::uno::Reference<
+            css::container::XContainerListener > const & xListener) override;
+
+    virtual void SAL_CALL removeContainerListener(
+        css::uno::Reference<
+            css::container::XContainerListener > const & xListener) override;
+
+    virtual OUString SAL_CALL getExactName(
+        OUString const & aApproximateName) override;
+
+    virtual css::uno::Sequence< css::beans::Property >
+    SAL_CALL getProperties() override;
+
+    virtual css::beans::Property SAL_CALL getPropertyByName(
+        OUString const & aName) override;
+
+    virtual sal_Bool SAL_CALL hasPropertyByName(OUString const & Name) override;
+
+    virtual OUString SAL_CALL getHierarchicalName() override;
+
+    virtual OUString SAL_CALL composeHierarchicalName(
+        OUString const & aRelativeName) override;
+
+    virtual OUString SAL_CALL getName() override;
+
+    virtual void SAL_CALL setName(OUString const & aName) override;
+
+    virtual css::beans::Property SAL_CALL getAsProperty() override;
+
+    virtual
+    css::uno::Reference< css::beans::XPropertySetInfo >
+    SAL_CALL getPropertySetInfo() override;
+
+    virtual void SAL_CALL setPropertyValue(
+        OUString const & aPropertyName,
+        css::uno::Any const & aValue) override;
+
+    virtual css::uno::Any SAL_CALL getPropertyValue(
+        OUString const & PropertyName) override;
+
+    virtual void SAL_CALL addPropertyChangeListener(
+        OUString const & aPropertyName,
+        css::uno::Reference<
+            css::beans::XPropertyChangeListener > const & xListener) override;
+
+    virtual void SAL_CALL removePropertyChangeListener(
+        OUString const & aPropertyName,
+        css::uno::Reference<
+            css::beans::XPropertyChangeListener > const & aListener) override;
+
+    virtual void SAL_CALL addVetoableChangeListener(
+        OUString const & PropertyName,
+        css::uno::Reference<
+            css::beans::XVetoableChangeListener > const & aListener) override;
+
+    virtual void SAL_CALL removeVetoableChangeListener(
+        OUString const & PropertyName,
+        css::uno::Reference<
+            css::beans::XVetoableChangeListener > const & aListener) override;
+
+    virtual void SAL_CALL setPropertyValues(
+        css::uno::Sequence< OUString > const & aPropertyNames,
+        css::uno::Sequence< css::uno::Any > const &
+            aValues) override;
+
+    virtual css::uno::Sequence< css::uno::Any > SAL_CALL
+    getPropertyValues(
+        css::uno::Sequence< OUString > const & aPropertyNames) override;
+
+    virtual void SAL_CALL addPropertiesChangeListener(
+        css::uno::Sequence< OUString > const & aPropertyNames,
+        css::uno::Reference<
+            css::beans::XPropertiesChangeListener > const &
+                xListener) override;
+
+    virtual void SAL_CALL removePropertiesChangeListener(
+        css::uno::Reference<
+            css::beans::XPropertiesChangeListener > const &
+                xListener) override;
+
+    virtual void SAL_CALL firePropertiesChangeEvent(
+        css::uno::Sequence< OUString > const & aPropertyNames,
+        css::uno::Reference<
+            css::beans::XPropertiesChangeListener > const &
+                xListener) override;
+
+    virtual
+    css::uno::Reference<
+        css::beans::XHierarchicalPropertySetInfo > SAL_CALL
+    getHierarchicalPropertySetInfo() override;
+
+    virtual void SAL_CALL setHierarchicalPropertyValue(
+        OUString const & aHierarchicalPropertyName,
+        css::uno::Any const & aValue) override;
+
+    virtual css::uno::Any SAL_CALL getHierarchicalPropertyValue(
+        OUString const & aHierarchicalPropertyName) override;
+
+    virtual void SAL_CALL setHierarchicalPropertyValues(
+        css::uno::Sequence< OUString > const &
+            aHierarchicalPropertyNames,
+        css::uno::Sequence< css::uno::Any > const &
+            Values) override;
+
+    virtual css::uno::Sequence< css::uno::Any > SAL_CALL
+    getHierarchicalPropertyValues(
+        css::uno::Sequence< OUString > const &
+            aHierarchicalPropertyNames) override;
+
+    virtual css::beans::Property SAL_CALL
+    getPropertyByHierarchicalName(OUString const & aHierarchicalName) override;
+
+    virtual sal_Bool SAL_CALL hasPropertyByHierarchicalName(
+        OUString const & aHierarchicalName) override;
+
+    virtual void SAL_CALL replaceByName(
+        OUString const & aName, css::uno::Any const & aElement) override;
+
+    virtual void SAL_CALL insertByName(
+        OUString const & aName, css::uno::Any const & aElement) override;
+
+    virtual void SAL_CALL removeByName(OUString const & aName) override;
+
+    virtual css::uno::Reference< css::uno::XInterface >
+    SAL_CALL createInstance() override;
+
+    virtual css::uno::Reference< css::uno::XInterface >
+    SAL_CALL createInstanceWithArguments(
+        css::uno::Sequence< css::uno::Any > const &
+            aArguments) override;
+
+protected:
+    explicit Access(Components & components);
+
+    virtual ~Access() override;
+
+    virtual const OUString & getNameInternal() = 0;
+    virtual rtl::Reference< RootAccess > getRootAccess() = 0;
+    virtual rtl::Reference< Access > getParentAccess() = 0;
+
+    virtual void addTypes(std::vector< css::uno::Type > * types)
+        const = 0;
+
+    virtual void addSupportedServiceNames(
+        std::vector<OUString> * services) = 0;
+
+    virtual void initDisposeBroadcaster(Broadcaster * broadcaster);
+    virtual void clearListeners() noexcept;
+
+    virtual css::uno::Any SAL_CALL queryInterface(
+        css::uno::Type const & aType) override;
+
+    Components & getComponents() const { return components_;}
+
+    void checkLocalizedPropertyAccess();
+
+    rtl::Reference< Node > getParentNode();
+    rtl::Reference< ChildAccess > getChild(OUString const & name);
+    std::vector< rtl::Reference< ChildAccess > > getAllChildren();
+
+    void checkValue(
+        css::uno::Any const & value, Type type, bool nillable);
+
+    void insertLocalizedValueChild(
+        OUString const & name, css::uno::Any const & value,
+        Modifications * localModifications);
+
+    void reportChildChanges(
+        std::vector< css::util::ElementChange > * changes);
+
+    void commitChildChanges(bool valid, Modifications * globalModifications);
+
+    void initBroadcasterAndChanges(
+        Modifications::Node const & modifications, Broadcaster * broadcaster,
+        std::vector< css::util::ElementChange > * changes);
+
+    bool isDisposed() const { return disposed_;}
+
+private:
+    Access(const Access&) = delete;
+    Access& operator=(const Access&) = delete;
+
+    struct ModifiedChild {
+        rtl::Reference< ChildAccess > child;
+        bool directlyModified;
+
+        ModifiedChild();
+
+        ModifiedChild(
+            rtl::Reference< ChildAccess > theChild,
+            bool theDirectlyModified);
+    };
+
+    typedef config_map< ModifiedChild > ModifiedChildren;
+
+    rtl::Reference< ChildAccess > getModifiedChild(
+        ModifiedChildren::iterator const & childIterator);
+
+    rtl::Reference< ChildAccess > getUnmodifiedChild(
+        OUString const & name);
+
+    rtl::Reference< ChildAccess > getSubChild(OUString const & path);
+
+    bool setChildProperty(
+        OUString const & name, css::uno::Any const & value,
+        Modifications * localModifications);
+
+    css::beans::Property asProperty();
+
+    bool getByNameFast(const OUString & name, css::uno::Any & value);
+    rtl::Reference< ChildAccess > createUnmodifiedChild(const OUString &name,
+                                                        const rtl::Reference< Node > &node);
+
+    void checkFinalized();
+
+    void checkKnownProperty(OUString const & descriptor);
+
+    rtl::Reference< ChildAccess > getFreeSetMember( css::uno::Any const & value);
+
+    rtl::Reference< Access > getNotificationRoot();
+
+    typedef config_map< ChildAccess * > WeakChildMap;
+
+    typedef
+        std::multiset<
+            css::uno::Reference<
+                css::lang::XEventListener > >
+        DisposeListeners;
+
+    typedef
+        std::multiset<
+            css::uno::Reference<
+                css::container::XContainerListener > >
+        ContainerListeners;
+
+    typedef
+        std::multiset<
+            css::uno::Reference<
+                css::beans::XPropertyChangeListener > >
+        PropertyChangeListenersElement;
+
+    typedef config_map< PropertyChangeListenersElement >
+        PropertyChangeListeners;
+
+    typedef
+        std::multiset<
+            css::uno::Reference<
+                css::beans::XVetoableChangeListener > >
+        VetoableChangeListenersElement;
+
+    typedef config_map< VetoableChangeListenersElement >
+        VetoableChangeListeners;
+
+    typedef
+        std::multiset<
+            css::uno::Reference<
+                css::beans::XPropertiesChangeListener > >
+        PropertiesChangeListeners;
+
+    Components & components_;
+    ModifiedChildren modifiedChildren_;
+    WeakChildMap cachedChildren_;
+    DisposeListeners disposeListeners_;
+    ContainerListeners containerListeners_;
+    PropertyChangeListeners propertyChangeListeners_;
+    VetoableChangeListeners vetoableChangeListeners_;
+    PropertiesChangeListeners propertiesChangeListeners_;
+    bool disposed_;
+
+    std::shared_ptr<osl::Mutex> lock_;
+
+#if !defined NDEBUG
+protected:
+    enum {
+        IS_ANY = 0, IS_GROUP = 0x01, IS_SET = 0x02, IS_EXTENSIBLE = 0x04,
+        IS_GROUP_MEMBER = 0x08, IS_SET_MEMBER = 0x10, IS_UPDATE = 0x20 };
+    bool thisIs(int what);
+#endif
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/additions.hxx b/configmgr/source/additions.hxx
new file mode 100644
index 000000000..9f50f1878
--- /dev/null
+++ b/configmgr/source/additions.hxx
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+
+#include <vector>
+
+namespace configmgr
+{
+// Additions is a list of configuration node paths
+typedef std::vector<std::vector<OUString>> Additions;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/broadcaster.cxx b/configmgr/source/broadcaster.cxx
new file mode 100644
index 000000000..f1830ee81
--- /dev/null
+++ b/configmgr/source/broadcaster.cxx
@@ -0,0 +1,230 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/beans/XPropertiesChangeListener.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/container/XContainerListener.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/util/XChangesListener.hpp>
+#include <cppuhelper/exc_hlp.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+
+#include "broadcaster.hxx"
+
+namespace configmgr {
+
+namespace {
+
+void appendMessage(
+    OUStringBuffer & buffer, css::uno::Exception const & exception)
+{
+    buffer.append("; ");
+    buffer.append(exception.Message);
+}
+
+}
+
+void Broadcaster::addDisposeNotification(
+    css::uno::Reference< css::lang::XEventListener > const & listener,
+    css::lang::EventObject const & event)
+{
+    disposeNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::addContainerElementReplacedNotification(
+    css::uno::Reference< css::container::XContainerListener > const & listener,
+    css::container::ContainerEvent const & event)
+{
+    containerElementReplacedNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::addContainerElementInsertedNotification(
+    css::uno::Reference< css::container::XContainerListener > const & listener,
+    css::container::ContainerEvent const & event)
+{
+    containerElementInsertedNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::addContainerElementRemovedNotification(
+    css::uno::Reference< css::container::XContainerListener > const & listener,
+    css::container::ContainerEvent const & event)
+{
+    containerElementRemovedNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::addPropertyChangeNotification(
+    css::uno::Reference< css::beans::XPropertyChangeListener > const & listener,
+    css::beans::PropertyChangeEvent const & event)
+{
+    propertyChangeNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::addPropertiesChangeNotification(
+    css::uno::Reference< css::beans::XPropertiesChangeListener > const &
+        listener,
+    css::uno::Sequence< css::beans::PropertyChangeEvent > const & event)
+{
+    propertiesChangeNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::addChangesNotification(
+    css::uno::Reference< css::util::XChangesListener > const & listener,
+    css::util::ChangesEvent const & event)
+{
+    changesNotifications_.emplace_back(listener, event);
+}
+
+void Broadcaster::send() {
+    css::uno::Any exception;
+    OUStringBuffer messages;
+    for (auto& rNotification : disposeNotifications_) {
+        try {
+            rNotification.listener->disposing(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    for (auto& rNotification : containerElementInsertedNotifications_)
+    {
+        try {
+            rNotification.listener->elementInserted(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    for (auto& rNotification : containerElementRemovedNotifications_)
+    {
+        try {
+            rNotification.listener->elementRemoved(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    for (auto& rNotification : containerElementReplacedNotifications_)
+    {
+        try {
+            rNotification.listener->elementReplaced(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    for (auto& rNotification : propertyChangeNotifications_)
+    {
+        try {
+            rNotification.listener->propertyChange(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    for (auto& rNotification : propertiesChangeNotifications_)
+    {
+        try {
+            rNotification.listener->propertiesChange(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    for (auto& rNotification : changesNotifications_) {
+        try {
+            rNotification.listener->changesOccurred(rNotification.event);
+        } catch (css::lang::DisposedException &) {
+        } catch (css::uno::Exception & e) {
+            exception = cppu::getCaughtException();
+            appendMessage(messages, e);
+        }
+    }
+    if (exception.hasValue()) {
+        throw css::lang::WrappedTargetRuntimeException(
+            ("configmgr exceptions during listener notification" +
+             messages.makeStringAndClear()),
+            css::uno::Reference< css::uno::XInterface >(),
+            exception);
+    }
+}
+
+Broadcaster::DisposeNotification::DisposeNotification(
+    css::uno::Reference< css::lang::XEventListener > const & theListener,
+    css::lang::EventObject  theEvent):
+    listener(theListener), event(std::move(theEvent))
+{
+    assert(theListener.is());
+}
+
+Broadcaster::ContainerNotification::ContainerNotification(
+    css::uno::Reference< css::container::XContainerListener > const &
+        theListener,
+    css::container::ContainerEvent  theEvent):
+    listener(theListener), event(std::move(theEvent))
+{
+    assert(theListener.is());
+}
+
+Broadcaster::PropertyChangeNotification::PropertyChangeNotification(
+    css::uno::Reference< css::beans::XPropertyChangeListener > const &
+        theListener,
+    css::beans::PropertyChangeEvent  theEvent):
+    listener(theListener), event(std::move(theEvent))
+{
+    assert(theListener.is());
+}
+
+Broadcaster::PropertiesChangeNotification::PropertiesChangeNotification(
+    css::uno::Reference< css::beans::XPropertiesChangeListener > const &
+        theListener,
+    css::uno::Sequence< css::beans::PropertyChangeEvent > const & theEvent):
+    listener(theListener), event(theEvent)
+{
+    assert(theListener.is());
+}
+
+Broadcaster::ChangesNotification::ChangesNotification(
+    css::uno::Reference< css::util::XChangesListener > const & theListener,
+    css::util::ChangesEvent  theEvent):
+    listener(theListener), event(std::move(theEvent))
+{
+    assert(theListener.is());
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/broadcaster.hxx b/configmgr/source/broadcaster.hxx
new file mode 100644
index 000000000..d0c461e73
--- /dev/null
+++ b/configmgr/source/broadcaster.hxx
@@ -0,0 +1,139 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <com/sun/star/beans/PropertyChangeEvent.hpp>
+#include <com/sun/star/container/ContainerEvent.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/util/ChangesEvent.hpp>
+
+namespace com::sun::star {
+    namespace beans {
+        class XPropertiesChangeListener;
+        class XPropertyChangeListener;
+    }
+    namespace container { class XContainerListener; }
+    namespace lang { class XEventListener; }
+    namespace util { class XChangesListener; }
+}
+
+namespace configmgr {
+
+class Broadcaster {
+public:
+    Broadcaster() {}
+
+    void addDisposeNotification(
+        css::uno::Reference< css::lang::XEventListener > const & listener,
+        css::lang::EventObject const & event);
+
+    void addContainerElementInsertedNotification(
+        css::uno::Reference< css::container::XContainerListener > const & listener,
+        css::container::ContainerEvent const & event);
+
+    void addContainerElementRemovedNotification(
+        css::uno::Reference< css::container::XContainerListener > const & listener,
+        css::container::ContainerEvent const & event);
+
+    void addContainerElementReplacedNotification(
+        css::uno::Reference< css::container::XContainerListener > const & listener,
+        css::container::ContainerEvent const & event);
+
+    void addPropertyChangeNotification(
+        css::uno::Reference< css::beans::XPropertyChangeListener > const & listener,
+        css::beans::PropertyChangeEvent const & event);
+
+    void addPropertiesChangeNotification(
+        css::uno::Reference< css::beans::XPropertiesChangeListener > const & listener,
+        css::uno::Sequence< css::beans::PropertyChangeEvent > const & event);
+
+    void addChangesNotification(
+        css::uno::Reference< css::util::XChangesListener > const & listener,
+        css::util::ChangesEvent const & event);
+
+    void send();
+
+private:
+    Broadcaster(const Broadcaster&) = delete;
+    Broadcaster& operator=(const Broadcaster&) = delete;
+
+    struct DisposeNotification {
+        css::uno::Reference< css::lang::XEventListener >  listener;
+        css::lang::EventObject                            event;
+
+        DisposeNotification(
+            css::uno::Reference< css::lang::XEventListener > const & theListener,
+            css::lang::EventObject theEvent);
+    };
+
+    struct ContainerNotification {
+        css::uno::Reference< css::container::XContainerListener > listener;
+        css::container::ContainerEvent event;
+
+        ContainerNotification(
+            css::uno::Reference< css::container::XContainerListener > const & theListener,
+            css::container::ContainerEvent theEvent);
+    };
+
+    struct PropertyChangeNotification {
+        css::uno::Reference< css::beans::XPropertyChangeListener > listener;
+        css::beans::PropertyChangeEvent                            event;
+
+        PropertyChangeNotification(
+            css::uno::Reference< css::beans::XPropertyChangeListener > const & theListener,
+            css::beans::PropertyChangeEvent theEvent);
+    };
+
+    struct PropertiesChangeNotification {
+        css::uno::Reference< css::beans::XPropertiesChangeListener > listener;
+        css::uno::Sequence< css::beans::PropertyChangeEvent >        event;
+
+        PropertiesChangeNotification(
+            css::uno::Reference< css::beans::XPropertiesChangeListener > const & theListener,
+            css::uno::Sequence< css::beans::PropertyChangeEvent > const & theEvent);
+    };
+
+    struct ChangesNotification {
+        css::uno::Reference< css::util::XChangesListener > listener;
+        css::util::ChangesEvent                            event;
+
+        ChangesNotification(
+            css::uno::Reference< css::util::XChangesListener > const & theListener,
+            css::util::ChangesEvent theEvent);
+    };
+
+    std::vector< DisposeNotification > disposeNotifications_;
+    std::vector< ContainerNotification > containerElementInsertedNotifications_;
+    std::vector< ContainerNotification > containerElementRemovedNotifications_;
+    std::vector< ContainerNotification > containerElementReplacedNotifications_;
+    std::vector< PropertyChangeNotification > propertyChangeNotifications_;
+    std::vector< PropertiesChangeNotification > propertiesChangeNotifications_;
+    std::vector< ChangesNotification > changesNotifications_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/childaccess.cxx b/configmgr/source/childaccess.cxx
new file mode 100644
index 000000000..60a11006b
--- /dev/null
+++ b/configmgr/source/childaccess.cxx
@@ -0,0 +1,350 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <utility>
+#include <vector>
+
+#include <com/sun/star/container/XChild.hpp>
+#include <com/sun/star/lang/NoSupportException.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/Type.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <cppu/unotype.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <cppuhelper/weak.hxx>
+#include <comphelper/servicehelper.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+
+#include "access.hxx"
+#include "childaccess.hxx"
+#include "components.hxx"
+#include "data.hxx"
+#include "localizedpropertynode.hxx"
+#include "localizedvaluenode.hxx"
+#include "lock.hxx"
+#include "modifications.hxx"
+#include "node.hxx"
+#include "propertynode.hxx"
+#include "rootaccess.hxx"
+#include "type.hxx"
+
+namespace configmgr {
+
+css::uno::Sequence< sal_Int8 > const & ChildAccess::getUnoTunnelId()
+{
+    static const comphelper::UnoIdInit theChildAccessUnoTunnelId;
+    return theChildAccessUnoTunnelId.getSeq();
+}
+
+ChildAccess::ChildAccess(
+    Components & components, rtl::Reference< RootAccess > const & root,
+    rtl::Reference< Access > const & parent, OUString name,
+    rtl::Reference< Node > const & node):
+    Access(components), root_(root), parent_(parent), name_(std::move(name)), node_(node),
+    inTransaction_(false),
+    lock_( lock() )
+{
+    assert(root.is() && parent.is() && node.is());
+}
+
+ChildAccess::ChildAccess(
+    Components & components, rtl::Reference< RootAccess > const & root,
+    rtl::Reference< Node > const & node):
+    Access(components), root_(root), node_(node), inTransaction_(false),
+    lock_( lock() )
+{
+    assert(root.is() && node.is());
+}
+
+std::vector<OUString> ChildAccess::getAbsolutePath() {
+    rtl::Reference< Access > parent(getParentAccess());
+    assert(parent.is());
+    std::vector<OUString> path(parent->getAbsolutePath());
+    path.push_back(name_);
+    return path;
+}
+
+std::vector<OUString> ChildAccess::getRelativePath() {
+    std::vector<OUString> path;
+    rtl::Reference< Access > parent(getParentAccess());
+    if (parent.is()) {
+        path = parent->getRelativePath();
+    }
+    path.push_back(name_);
+    return path;
+}
+
+OUString ChildAccess::getRelativePathRepresentation() {
+    OUStringBuffer path(128);
+    rtl::Reference< Access > parent(getParentAccess());
+    if (parent.is()) {
+        path.append(parent->getRelativePathRepresentation());
+        if (!path.isEmpty()) {
+            path.append('/');
+        }
+    }
+    path.append(Data::createSegment(node_->getTemplateName(), name_));
+    return path.makeStringAndClear();
+}
+
+rtl::Reference< Node > ChildAccess::getNode() {
+    return node_;
+}
+
+bool ChildAccess::isFinalized() {
+    return node_->getFinalized() != Data::NO_LAYER ||
+        (parent_.is() && parent_->isFinalized());
+}
+
+const OUString & ChildAccess::getNameInternal() {
+    return name_;
+}
+
+rtl::Reference< RootAccess > ChildAccess::getRootAccess() {
+    return root_;
+}
+
+rtl::Reference< Access > ChildAccess::getParentAccess() {
+    return parent_;
+}
+
+void ChildAccess::acquire() noexcept {
+    Access::acquire();
+}
+
+void ChildAccess::release() noexcept {
+    Access::release();
+}
+
+css::uno::Reference< css::uno::XInterface > ChildAccess::getParent()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return static_cast< cppu::OWeakObject * >(parent_.get());
+}
+
+void ChildAccess::setParent(css::uno::Reference< css::uno::XInterface > const &)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    throw css::lang::NoSupportException(
+        "setParent", static_cast< cppu::OWeakObject * >(this));
+}
+
+sal_Int64 ChildAccess::getSomething(
+    css::uno::Sequence< sal_Int8 > const & aIdentifier)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return comphelper::getSomethingImpl(aIdentifier, this);
+}
+
+void ChildAccess::bind(
+    rtl::Reference< RootAccess > const & root,
+    rtl::Reference< Access > const & parent, OUString const & name)
+    noexcept
+{
+    assert(!parent_.is() && root.is() && parent.is() && !name.isEmpty());
+    root_ = root;
+    parent_ = parent;
+    name_ = name;
+}
+
+void ChildAccess::unbind() noexcept {
+    assert(parent_.is());
+    parent_->releaseChild(name_);
+    parent_.clear();
+    inTransaction_ = true;
+}
+
+void ChildAccess::committed() {
+    inTransaction_ = false;
+}
+
+void ChildAccess::setNode(rtl::Reference< Node > const & node) {
+    node_ = node;
+}
+
+void ChildAccess::setProperty(
+    css::uno::Any const & value, Modifications * localModifications)
+{
+    assert(localModifications != nullptr);
+    Type type = TYPE_ERROR;
+    bool isNillable = false;
+    switch (node_->kind()) {
+    case Node::KIND_PROPERTY:
+        {
+            PropertyNode * prop = static_cast< PropertyNode * >(node_.get());
+            type = prop->getStaticType();
+            isNillable = prop->isNillable();
+        }
+        break;
+    case Node::KIND_LOCALIZED_PROPERTY:
+        {
+            OUString locale(getRootAccess()->getLocale());
+            if (!Components::allLocales(locale)) {
+                rtl::Reference< ChildAccess > child(getChild(locale));
+                if (child.is()) {
+                    child->setProperty(value, localModifications);
+                } else {
+                    insertLocalizedValueChild(
+                        locale, value, localModifications);
+                }
+                return;
+            }
+        }
+        break;
+    case Node::KIND_LOCALIZED_VALUE:
+        {
+            LocalizedPropertyNode * locprop =
+                static_cast< LocalizedPropertyNode * >(getParentNode().get());
+            type = locprop->getStaticType();
+            isNillable = locprop->isNillable();
+        }
+        break;
+    default:
+        break;
+    }
+    checkValue(value, type, isNillable);
+    getParentAccess()->markChildAsModified(this);
+    changedValue_.emplace(value);
+    localModifications->add(getRelativePath());
+}
+
+
+css::uno::Any ChildAccess::asValue()
+{
+    if (changedValue_)
+    {
+        return *changedValue_;
+    }
+    css::uno::Any value;
+    if (!asSimpleValue(node_, value, getComponents()))
+    {
+        if (node_->kind() == Node::KIND_LOCALIZED_PROPERTY)
+        {
+            OUString locale(getRootAccess()->getLocale());
+            if (!Components::allLocales(locale)) {
+                rtl::Reference< ChildAccess > child(getChild("*" + locale));
+                // As a last resort, return a nil value even though it may be
+                // illegal for the given property:
+                return child.is() ? child->asValue() : css::uno::Any();
+            }
+        }
+        value <<= css::uno::Reference< css::uno::XInterface >(
+                            static_cast< cppu::OWeakObject * >(this));
+    }
+    return value;
+}
+
+/// Can we quickly extract a simple value into value ? if so returns true
+bool ChildAccess::asSimpleValue(const rtl::Reference< Node > &rNode,
+                                css::uno::Any &value,
+                                Components &components)
+{
+    switch (rNode->kind()) {
+    case Node::KIND_PROPERTY:
+        value = static_cast< PropertyNode * >(rNode.get())->getValue(components);
+        return true;
+    case Node::KIND_LOCALIZED_VALUE:
+        value = static_cast< LocalizedValueNode * >(rNode.get())->getValue();
+        return true;
+    default:
+        return false;
+    }
+}
+
+void ChildAccess::commitChanges(bool valid, Modifications * globalModifications)
+{
+    assert(globalModifications != nullptr);
+    commitChildChanges(valid, globalModifications);
+    if (valid && changedValue_)
+    {
+        std::vector<OUString> path(getAbsolutePath());
+        getComponents().addModification(path);
+        globalModifications->add(path);
+        switch (node_->kind()) {
+        case Node::KIND_PROPERTY:
+            static_cast< PropertyNode * >(node_.get())->setValue(
+                Data::NO_LAYER, *changedValue_);
+            break;
+        case Node::KIND_LOCALIZED_VALUE:
+            static_cast< LocalizedValueNode * >(node_.get())->setValue(
+                Data::NO_LAYER, *changedValue_);
+            break;
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+    }
+    changedValue_.reset();
+}
+
+ChildAccess::~ChildAccess() {
+    osl::MutexGuard g(*lock_);
+    if (parent_.is()) {
+        parent_->releaseChild(name_);
+    }
+}
+
+void ChildAccess::addTypes(std::vector< css::uno::Type > * types) const {
+    assert(types != nullptr);
+    types->push_back(cppu::UnoType< css::container::XChild >::get());
+    types->push_back(cppu::UnoType< css::lang::XUnoTunnel >::get());
+}
+
+void ChildAccess::addSupportedServiceNames(
+    std::vector<OUString> * services)
+{
+    assert(services != nullptr);
+    services->push_back(
+        getParentNode()->kind() == Node::KIND_GROUP
+        ? OUString("com.sun.star.configuration.GroupElement")
+        : OUString("com.sun.star.configuration.SetElement"));
+}
+
+css::uno::Any ChildAccess::queryInterface(css::uno::Type const & aType)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    css::uno::Any res(Access::queryInterface(aType));
+    return res.hasValue()
+        ? res
+        : cppu::queryInterface(
+            aType, static_cast< css::container::XChild * >(this),
+            static_cast< css::lang::XUnoTunnel * >(this));
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/childaccess.hxx b/configmgr/source/childaccess.hxx
new file mode 100644
index 000000000..3b7a5a541
--- /dev/null
+++ b/configmgr/source/childaccess.hxx
@@ -0,0 +1,137 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <memory>
+#include <optional>
+#include <vector>
+
+#include <com/sun/star/container/XChild.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <rtl/ref.hxx>
+#include <sal/types.h>
+
+#include "access.hxx"
+
+namespace com::sun::star::uno {
+    class Any;
+    class Type;
+    class XInterface;
+}
+
+namespace configmgr {
+
+class Components;
+class Modifications;
+class Node;
+class RootAccess;
+
+class ChildAccess:
+    public Access, public css::container::XChild,
+    public css::lang::XUnoTunnel
+{
+public:
+    static css::uno::Sequence< sal_Int8 > const & getUnoTunnelId();
+
+    ChildAccess(
+        Components & components, rtl::Reference< RootAccess > const & root,
+        rtl::Reference< Access > const & parent, OUString name,
+        rtl::Reference< Node > const & node);
+
+    ChildAccess(
+        Components & components, rtl::Reference< RootAccess > const & root,
+        rtl::Reference< Node > const & node);
+
+    virtual std::vector<OUString> getAbsolutePath() override;
+    virtual std::vector<OUString> getRelativePath() override;
+
+    virtual OUString getRelativePathRepresentation() override;
+    virtual rtl::Reference< Node > getNode() override;
+
+    virtual bool isFinalized() override;
+
+    virtual const OUString & getNameInternal() override;
+
+    virtual rtl::Reference< RootAccess > getRootAccess() override;
+    virtual rtl::Reference< Access > getParentAccess() override;
+
+    virtual void SAL_CALL acquire() noexcept override;
+    virtual void SAL_CALL release() noexcept override;
+
+    virtual css::uno::Reference< css::uno::XInterface >
+    SAL_CALL getParent() override;
+
+    virtual void SAL_CALL setParent(
+        css::uno::Reference< css::uno::XInterface > const &) override;
+
+    virtual sal_Int64 SAL_CALL getSomething(
+        css::uno::Sequence< sal_Int8 > const & aIdentifier) override;
+
+    void bind(
+        rtl::Reference< RootAccess > const & root,
+        rtl::Reference< Access > const & parent, OUString const & name)
+        noexcept;
+
+    void unbind() noexcept;
+
+    bool isInTransaction() const { return inTransaction_; }
+    void committed();
+    void setNode(rtl::Reference< Node > const & node);
+
+    void setProperty(
+        css::uno::Any const & value,
+        Modifications * localModifications);
+
+    css::uno::Any asValue();
+    static bool asSimpleValue(const rtl::Reference< Node > &rNode,
+                              css::uno::Any &value,
+                              Components &components);
+
+    void commitChanges(bool valid, Modifications * globalModifications);
+
+private:
+    virtual ~ChildAccess() override;
+
+    virtual void addTypes(
+        std::vector< css::uno::Type > * types) const override;
+
+    virtual void addSupportedServiceNames(
+        std::vector<OUString> * services) override;
+
+    virtual css::uno::Any SAL_CALL queryInterface(
+        css::uno::Type const & aType) override;
+
+    rtl::Reference< RootAccess > root_;
+    rtl::Reference< Access > parent_; // null if free node
+    OUString name_;
+    rtl::Reference< Node > node_;
+    std::optional< css::uno::Any > changedValue_;
+    bool inTransaction_;
+        // to determine if a free node can be inserted underneath some root
+    std::shared_ptr<osl::Mutex> lock_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/components.cxx b/configmgr/source/components.cxx
new file mode 100644
index 000000000..0693ec26b
--- /dev/null
+++ b/configmgr/source/components.cxx
@@ -0,0 +1,895 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <chrono>
+#include <utility>
+#include <vector>
+#include <set>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/container/NoSuchElementException.hpp>
+#include <com/sun/star/lang/WrappedTargetException.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <cppuhelper/exc_hlp.hxx>
+#include <config_dconf.h>
+#include <config_folders.h>
+#include <osl/conditn.hxx>
+#include <osl/file.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <salhelper/thread.hxx>
+#include <tools/diagnose_ex.h>
+#include <comphelper/backupfilehelper.hxx>
+#include <o3tl/string_view.hxx>
+
+#include "additions.hxx"
+#include "components.hxx"
+#include "data.hxx"
+#include "lock.hxx"
+#include "modifications.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "parsemanager.hxx"
+#include "partial.hxx"
+#include "rootaccess.hxx"
+#include "writemodfile.hxx"
+#include "xcdparser.hxx"
+#include "xcuparser.hxx"
+#include "xcsparser.hxx"
+
+#if ENABLE_DCONF
+#include "dconf.hxx"
+#endif
+
+#if defined(_WIN32)
+#include "winreg.hxx"
+#endif
+
+namespace configmgr {
+
+namespace {
+
+struct UnresolvedVectorItem {
+    OUString name;
+    rtl::Reference< ParseManager > manager;
+
+    UnresolvedVectorItem(
+        OUString  theName,
+        rtl::Reference< ParseManager > theManager):
+        name(std::move(theName)), manager(std::move(theManager)) {}
+};
+
+typedef std::vector< UnresolvedVectorItem > UnresolvedVector;
+
+void parseXcsFile(
+    OUString const & url, int layer, Data & data, Partial const * partial,
+    Modifications * modifications, Additions * additions)
+{
+    assert(partial == nullptr && modifications == nullptr && additions == nullptr);
+    (void) partial; (void) modifications; (void) additions;
+    bool ok = rtl::Reference< ParseManager >(
+        new ParseManager(url, new XcsParser(layer, data)))->parse(nullptr);
+    assert(ok);
+    (void) ok; // avoid warnings
+}
+
+void parseXcuFile(
+    OUString const & url, int layer, Data & data, Partial const * partial,
+    Modifications * modifications, Additions * additions)
+{
+    bool ok = rtl::Reference< ParseManager >(
+        new ParseManager(
+            url,
+            new XcuParser(layer, data, partial, modifications, additions)))->
+        parse(nullptr);
+    assert(ok);
+    (void) ok; // avoid warnings
+}
+
+OUString expand(OUString const & str) {
+    OUString s(str);
+    rtl::Bootstrap::expandMacros(s); //TODO: detect failure
+    return s;
+}
+
+bool canRemoveFromLayer(int layer, rtl::Reference< Node > const & node) {
+    assert(node.is());
+    if (node->getLayer() > layer && node->getLayer() < Data::NO_LAYER) {
+        return false;
+    }
+    switch (node->kind()) {
+    case Node::KIND_LOCALIZED_PROPERTY:
+    case Node::KIND_GROUP:
+        for (auto const& member : node->getMembers())
+        {
+            if (!canRemoveFromLayer(layer, member.second)) {
+                return false;
+            }
+        }
+        return true;
+    case Node::KIND_SET:
+        return node->getMembers().empty();
+    default: // Node::KIND_PROPERTY, Node::KIND_LOCALIZED_VALUE
+        return true;
+    }
+}
+
+}
+
+class Components::WriteThread: public salhelper::Thread {
+public:
+    WriteThread(
+        rtl::Reference< WriteThread > * reference, Components & components,
+        OUString url, Data const & data);
+
+    void flush() { delay_.set(); }
+
+private:
+    virtual ~WriteThread() override {}
+
+    virtual void execute() override;
+
+    rtl::Reference< WriteThread > * reference_;
+    Components & components_;
+    OUString url_;
+    Data const & data_;
+    osl::Condition delay_;
+    std::shared_ptr<osl::Mutex> lock_;
+};
+
+Components::WriteThread::WriteThread(
+    rtl::Reference< WriteThread > * reference, Components & components,
+    OUString url, Data const & data):
+    Thread("configmgrWriter"), reference_(reference), components_(components),
+    url_(std::move(url)), data_(data),
+    lock_( lock() )
+{
+    assert(reference != nullptr);
+}
+
+void Components::WriteThread::execute() {
+    delay_.wait(std::chrono::seconds(1)); // must not throw; result_error is harmless and ignored
+    osl::MutexGuard g(*lock_); // must not throw
+    try {
+        try {
+            writeModFile(components_, url_, data_);
+        } catch (css::uno::RuntimeException &) {
+            // Ignore write errors, instead of aborting:
+            TOOLS_WARN_EXCEPTION("configmgr", "error writing modifications");
+        }
+    } catch (...) {
+        reference_->clear();
+        throw;
+    }
+    reference_->clear();
+}
+
+Components & Components::getSingleton(
+    css::uno::Reference< css::uno::XComponentContext > const & context)
+{
+    assert(context.is());
+    static Components singleton(context);
+    return singleton;
+}
+
+bool Components::allLocales(std::u16string_view locale) {
+    return locale == u"*";
+}
+
+rtl::Reference< Node > Components::resolvePathRepresentation(
+    OUString const & pathRepresentation,
+    OUString * canonicRepresentation, std::vector<OUString> * path, int * finalizedLayer)
+    const
+{
+    return data_.resolvePathRepresentation(
+        pathRepresentation, canonicRepresentation, path, finalizedLayer);
+}
+
+rtl::Reference< Node > Components::getTemplate(OUString const & fullName) const
+{
+    return data_.getTemplate(Data::NO_LAYER, fullName);
+}
+
+void Components::addRootAccess(rtl::Reference< RootAccess > const & access) {
+    roots_.insert(access.get());
+}
+
+void Components::removeRootAccess(RootAccess * access) {
+    roots_.erase(access);
+}
+
+void Components::initGlobalBroadcaster(
+    Modifications const & modifications,
+    rtl::Reference< RootAccess > const & exclude, Broadcaster * broadcaster)
+{
+    //TODO: Iterate only over roots w/ listeners:
+    for (auto const& elemRoot : roots_)
+    {
+        rtl::Reference< RootAccess > root;
+        if (elemRoot->acquireCounting() > 1) {
+            root.set(elemRoot); // must not throw
+        }
+        elemRoot->releaseNondeleting();
+        if (root.is()) {
+            if (root != exclude) {
+                std::vector<OUString> path(root->getAbsolutePath());
+                Modifications::Node const * mods = &modifications.getRoot();
+                for (auto const& pathElem : path)
+                {
+                    Modifications::Node::Children::const_iterator k(
+                        mods->children.find(pathElem));
+                    if (k == mods->children.end()) {
+                        mods = nullptr;
+                        break;
+                    }
+                    mods = &k->second;
+                }
+                //TODO: If the complete tree of which root is a part is deleted,
+                // or replaced, mods will be null, but some of the listeners
+                // from within root should probably fire nonetheless:
+                if (mods != nullptr) {
+                    root->initBroadcaster(*mods, broadcaster);
+                }
+            }
+        }
+    }
+}
+
+void Components::addModification(std::vector<OUString> const & path) {
+    data_.modifications.add(path);
+}
+
+void Components::writeModifications() {
+
+    if (data_.modifications.empty())
+        return;
+
+    switch (modificationTarget_) {
+    case ModificationTarget::None:
+        break;
+    case ModificationTarget::File:
+        if (!writeThread_.is()) {
+            writeThread_ = new WriteThread(
+                &writeThread_, *this, modificationFileUrl_, data_);
+            writeThread_->launch();
+        }
+        break;
+    case ModificationTarget::Dconf:
+#if ENABLE_DCONF
+        dconf::writeModifications(*this, data_);
+#endif
+        break;
+    }
+}
+
+void Components::flushModifications() {
+    rtl::Reference< WriteThread > thread;
+    {
+        osl::MutexGuard g(*lock_);
+        thread = writeThread_;
+    }
+    if (thread.is()) {
+        thread->flush();
+        thread->join();
+    }
+}
+
+void Components::insertExtensionXcsFile(
+    bool shared, OUString const & fileUri)
+{
+    int layer = getExtensionLayer(shared);
+    try {
+        parseXcsFile(fileUri, layer, data_, nullptr, nullptr, nullptr);
+    } catch (css::container::NoSuchElementException & e) {
+        throw css::uno::RuntimeException(
+            "insertExtensionXcsFile does not exist: " + e.Message);
+    }
+}
+
+void Components::insertExtensionXcuFile(
+    bool shared, OUString const & fileUri, Modifications * modifications)
+{
+    assert(modifications != nullptr);
+    int layer = getExtensionLayer(shared) + 1;
+    Additions * adds = data_.addExtensionXcuAdditions(fileUri, layer);
+    try {
+        parseXcuFile(fileUri, layer, data_, nullptr, modifications, adds);
+    } catch (css::container::NoSuchElementException & e) {
+        data_.removeExtensionXcuAdditions(fileUri);
+        throw css::uno::RuntimeException(
+            "insertExtensionXcuFile does not exist: " + e.Message);
+    }
+}
+
+void Components::removeExtensionXcuFile(
+    OUString const & fileUri, Modifications * modifications)
+{
+    //TODO: Ideally, exactly the data coming from the specified xcu file would
+    // be removed.  However, not enough information is recorded in the in-memory
+    // data structures to do so.  So, as a workaround, all those set elements
+    // that were freshly added by the xcu and have afterwards been left
+    // unchanged or have only had their properties changed in the user layer are
+    // removed (and nothing else).  The heuristic to determine
+    // whether a node has been left unchanged is to check the layer ID (as
+    // usual) and additionally to check that the node does not recursively
+    // contain any non-empty sets (multiple extension xcu files are merged into
+    // one layer, so checking layer ID alone is not enough).  Since
+    // item->additions records all additions of set members in textual order,
+    // the latter check works well when iterating through item->additions in
+    // reverse order.
+    assert(modifications != nullptr);
+    rtl::Reference< Data::ExtensionXcu > item(
+        data_.removeExtensionXcuAdditions(fileUri));
+    if (!item.is())
+        return;
+
+    for (Additions::reverse_iterator i(item->additions.rbegin());
+         i != item->additions.rend(); ++i)
+    {
+        rtl::Reference< Node > parent;
+        NodeMap const * map = &data_.getComponents();
+        rtl::Reference< Node > node;
+        for (auto const& j : *i)
+        {
+            parent = node;
+            node = map->findNode(Data::NO_LAYER, j);
+            if (!node.is()) {
+                break;
+            }
+            map = &node->getMembers();
+        }
+        if (node.is()) {
+            assert(parent.is());
+            if (parent->kind() == Node::KIND_SET) {
+                assert(
+                    node->kind() == Node::KIND_GROUP ||
+                    node->kind() == Node::KIND_SET);
+                if (canRemoveFromLayer(item->layer, node)) {
+                    parent->getMembers().erase(i->back());
+                    data_.modifications.remove(*i);
+                    modifications->add(*i);
+                }
+            }
+        }
+    }
+    writeModifications();
+}
+
+void Components::insertModificationXcuFile(
+    OUString const & fileUri,
+    std::set< OUString > const & includedPaths,
+    std::set< OUString > const & excludedPaths,
+    Modifications * modifications)
+{
+    assert(modifications != nullptr);
+    Partial part(includedPaths, excludedPaths);
+    try {
+        parseFileLeniently(
+            &parseXcuFile, fileUri, Data::NO_LAYER, &part, modifications, nullptr);
+    } catch (const css::container::NoSuchElementException &) {
+        TOOLS_WARN_EXCEPTION(
+            "configmgr",
+            "error inserting non-existing \"" << fileUri << "\"");
+    }
+}
+
+css::beans::Optional< css::uno::Any > Components::getExternalValue(
+    std::u16string_view descriptor)
+{
+    size_t i = descriptor.find(' ');
+    if (i == 0 || i == std::u16string_view::npos) {
+        throw css::uno::RuntimeException(
+            OUString::Concat("bad external value descriptor ") + descriptor);
+    }
+    //TODO: Do not make calls with mutex locked:
+    OUString name(descriptor.substr(0, i));
+    ExternalServices::iterator j(externalServices_.find(name));
+    if (j == externalServices_.end()) {
+        css::uno::Reference< css::uno::XInterface > service;
+        try {
+            service = context_->getServiceManager()->createInstanceWithContext(
+                name, context_);
+        } catch (const css::uno::RuntimeException &) {
+            // Assuming these exceptions are real errors:
+            throw;
+        } catch (const css::uno::Exception &)  {
+            // Assuming these exceptions indicate that the service is not
+            // installed:
+            TOOLS_WARN_EXCEPTION(
+                "configmgr",
+                "createInstance(" << name << ") failed");
+        }
+        css::uno::Reference< css::beans::XPropertySet > propset;
+        if (service.is()) {
+            propset.set( service, css::uno::UNO_QUERY_THROW);
+        }
+        j = externalServices_.emplace(name, propset).first;
+    }
+    css::beans::Optional< css::uno::Any > value;
+    if (j->second.is()) {
+        try {
+            if (!(j->second->getPropertyValue(OUString(descriptor.substr(i + 1))) >>=
+                  value))
+            {
+                throw css::uno::RuntimeException(
+                    OUString::Concat("cannot obtain external value through ") + descriptor);
+            }
+        } catch (css::beans::UnknownPropertyException & e) {
+            throw css::uno::RuntimeException(
+                "unknown external value descriptor ID: " + e.Message);
+        } catch (css::lang::WrappedTargetException & e) {
+            css::uno::Any anyEx = cppu::getCaughtException();
+            throw css::lang::WrappedTargetRuntimeException(
+                "cannot obtain external value: " + e.Message,
+                nullptr, anyEx );
+        }
+    }
+    return value;
+}
+
+Components::Components(
+    css::uno::Reference< css::uno::XComponentContext > const & context):
+    context_(context), sharedExtensionLayer_(-1), userExtensionLayer_(-1),
+    modificationTarget_(ModificationTarget::None)
+{
+    assert(context.is());
+    lock_ = lock();
+    OUString conf(expand("${CONFIGURATION_LAYERS}"));
+    int layer = 0;
+    for (sal_Int32 i = 0;;) {
+        while (i != conf.getLength() && conf[i] == ' ') {
+            ++i;
+        }
+        if (i == conf.getLength()) {
+            break;
+        }
+        if (modificationTarget_ != ModificationTarget::None) {
+            throw css::uno::RuntimeException(
+                "CONFIGURATION_LAYERS: modification target layer followed by"
+                " further layers");
+        }
+        sal_Int32 c = i;
+        for (;; ++c) {
+            if (c == conf.getLength() || conf[c] == ' ') {
+                throw css::uno::RuntimeException(
+                    "CONFIGURATION_LAYERS: missing ':' in \"" + conf + "\"");
+            }
+            if (conf[c] == ':') {
+                break;
+            }
+        }
+        sal_Int32 n = conf.indexOf(' ', c + 1);
+        if (n == -1) {
+            n = conf.getLength();
+        }
+        OUString type(conf.copy(i, c - i));
+        OUString url(conf.copy(c + 1, n - c - 1));
+        if (type == "xcsxcu") {
+            sal_uInt32 nStartTime = osl_getGlobalTimer();
+            parseXcsXcuLayer(layer, url);
+            SAL_INFO("configmgr", "parseXcsXcuLayer() took " << (osl_getGlobalTimer() - nStartTime) << " ms");
+            layer += 2; //TODO: overflow
+        } else if (type == "bundledext") {
+            parseXcsXcuIniLayer(layer, url, false);
+            layer += 2; //TODO: overflow
+        } else if (type == "sharedext") {
+            if (sharedExtensionLayer_ != -1) {
+                throw css::uno::RuntimeException(
+                    "CONFIGURATION_LAYERS: multiple \"sharedext\" layers");
+            }
+            sharedExtensionLayer_ = layer;
+            parseXcsXcuIniLayer(layer, url, true);
+            layer += 2; //TODO: overflow
+        } else if (type == "userext") {
+            if (userExtensionLayer_ != -1) {
+                throw css::uno::RuntimeException(
+                    "CONFIGURATION_LAYERS: multiple \"userext\" layers");
+            }
+            userExtensionLayer_ = layer;
+            parseXcsXcuIniLayer(layer, url, true);
+            layer += 2; //TODO: overflow
+        } else if (type == "res") {
+            sal_uInt32 nStartTime = osl_getGlobalTimer();
+            parseResLayer(layer, url);
+            SAL_INFO("configmgr", "parseResLayer() took " << (osl_getGlobalTimer() - nStartTime) << " ms");
+            ++layer; //TODO: overflow
+#if ENABLE_DCONF
+        } else if (type == "dconf") {
+            if (url == "!") {
+                modificationTarget_ = ModificationTarget::Dconf;
+                dconf::readLayer(data_, Data::NO_LAYER);
+            } else if (url == "*") {
+                dconf::readLayer(data_, layer);
+            } else {
+                throw css::uno::RuntimeException(
+                    "CONFIGURATION_LAYERS: unknown \"dconf\" kind \"" + url
+                    + "\"");
+            }
+            ++layer; //TODO: overflow
+#endif
+#if defined(_WIN32)
+        } else if (type == "winreg") {
+            WinRegType eType;
+            if (url == "LOCAL_MACHINE" || url.isEmpty()/*backwards comp.*/) {
+                eType = WinRegType::LOCAL_MACHINE;
+            } else if (url == "CURRENT_USER") {
+                eType = WinRegType::CURRENT_USER;
+            } else {
+                throw css::uno::RuntimeException(
+                    "CONFIGURATION_LAYERS: unknown \"winreg\" kind \"" + url
+                    + "\"");
+            }
+            OUString aTempFileURL;
+            if (dumpWindowsRegistry(&aTempFileURL, eType)) {
+                parseFileLeniently(&parseXcuFile, aTempFileURL, layer, nullptr, nullptr, nullptr);
+                if (!getenv("SAL_CONFIG_WINREG_RETAIN_TMP"))
+                    osl::File::remove(aTempFileURL);
+            }
+            ++layer; //TODO: overflow
+#endif
+        } else if (type == "user") {
+            bool write;
+            if (url.startsWith("!", &url)) {
+                write = true;
+            } else if (url.startsWith("*", &url)) {
+                write = false;
+            } else {
+                write = true; // for backwards compatibility
+            }
+            if (url.isEmpty()) {
+                throw css::uno::RuntimeException(
+                    "CONFIGURATION_LAYERS: empty \"user\" URL");
+            }
+            bool ignore = false;
+#if ENABLE_DCONF
+            if (write) {
+                OUString token(
+                    expand("${SYSUSERCONFIG}/libreoffice/dconfwrite"));
+                osl::DirectoryItem it;
+                osl::FileBase::RC e = osl::DirectoryItem::get(token, it);
+                ignore = e == osl::FileBase::E_None;
+                SAL_INFO(
+                    "configmgr",
+                    "dconf write (<" << token << "> " << +e << "): "
+                        << int(ignore));
+                if (ignore) {
+                    modificationTarget_ = ModificationTarget::Dconf;
+                }
+            }
+#endif
+            if (!ignore) {
+                if (write) {
+                    modificationTarget_ = ModificationTarget::File;
+                    modificationFileUrl_ = url;
+                }
+                parseModificationLayer(write ? Data::NO_LAYER : layer, url);
+            }
+            ++layer; //TODO: overflow
+        } else {
+            throw css::uno::RuntimeException(
+                "CONFIGURATION_LAYERS: unknown layer type \"" + type + "\"");
+        }
+        i = n;
+    }
+}
+
+Components::~Components()
+{
+    // get flag if _exit was already called which is a sign to not secure user config.
+    // this is used for win only currently where calling _exit() unfortunately still
+    // calls destructors (what is not wanted). May be needed for other systems, too
+    // (unknown yet) but can do no harm
+    const bool bExitWasCalled(comphelper::BackupFileHelper::getExitWasCalled());
+
+#ifndef _WIN32
+    // we can add a SAL_WARN here for other systems where the destructor gets called after
+    // an _exit() call. Still safe - the getExitWasCalled() is used, but a hint that _exit
+    // behaves different on a system
+    SAL_WARN_IF(bExitWasCalled, "configmgr", "Components::~Components() called after _exit() call");
+#endif
+
+    if (bExitWasCalled)
+    {
+        // do not write, re-join threads
+        osl::MutexGuard g(*lock_);
+
+        if (writeThread_.is())
+        {
+            writeThread_->join();
+        }
+    }
+    else
+    {
+        // write changes
+        flushModifications();
+    }
+
+    for (auto const& rootElem : roots_)
+    {
+        rootElem->setAlive(false);
+    }
+}
+
+void Components::parseFileLeniently(
+    FileParser * parseFile, OUString const & url, int layer,
+    Partial const * partial, Modifications * modifications,
+    Additions * additions)
+{
+    assert(parseFile != nullptr);
+    try {
+        (*parseFile)(url, layer, data_, partial, modifications, additions);
+    } catch (const css::container::NoSuchElementException &) {
+        throw;
+    } catch (const css::uno::Exception &) { //TODO: more specific exception catching
+        // Ignore invalid XML files, instead of completely preventing OOo from
+        // starting:
+        TOOLS_WARN_EXCEPTION(
+            "configmgr",
+            "error reading \"" << url << "\"");
+    }
+}
+
+void Components::parseFiles(
+    int layer, OUString const & extension, FileParser * parseFile,
+    OUString const & url, bool recursive)
+{
+    osl::Directory dir(url);
+    switch (dir.open()) {
+    case osl::FileBase::E_None:
+        break;
+    case osl::FileBase::E_NOENT:
+        if (!recursive) {
+            return;
+        }
+        [[fallthrough]];
+    default:
+        throw css::uno::RuntimeException(
+            "cannot open directory " + url);
+    }
+    for (;;) {
+        osl::DirectoryItem i;
+        osl::FileBase::RC rc = dir.getNextItem(i, SAL_MAX_UINT32);
+        if (rc == osl::FileBase::E_NOENT) {
+            break;
+        }
+        if (rc != osl::FileBase::E_None) {
+            throw css::uno::RuntimeException(
+                "cannot iterate directory " + url);
+        }
+        osl::FileStatus stat(
+            osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileName |
+            osl_FileStatus_Mask_FileURL);
+        if (i.getFileStatus(stat) != osl::FileBase::E_None) {
+            throw css::uno::RuntimeException(
+                "cannot stat in directory " + url);
+        }
+        if (stat.getFileType() == osl::FileStatus::Directory) { //TODO: symlinks
+            parseFiles(layer, extension, parseFile, stat.getFileURL(), true);
+        } else {
+            OUString file(stat.getFileName());
+            if (file.endsWith(extension)) {
+                try {
+                    parseFileLeniently(
+                        parseFile, stat.getFileURL(), layer, nullptr, nullptr, nullptr);
+                } catch (css::container::NoSuchElementException & e) {
+                    if (stat.getFileType() == osl::FileStatus::Link) {
+                        SAL_WARN("configmgr", "dangling link <" << stat.getFileURL() << ">");
+                        continue;
+                    }
+                    throw css::uno::RuntimeException(
+                        "stat'ed file does not exist: " + e.Message);
+                }
+            }
+        }
+    }
+}
+
+void Components::parseFileList(
+    int layer, FileParser * parseFile, std::u16string_view urls,
+    bool recordAdditions)
+{
+    for (sal_Int32 i = 0;;) {
+        OUString url(o3tl::getToken(urls, 0, ' ', i));
+        if (!url.isEmpty()) {
+            Additions * adds = nullptr;
+            if (recordAdditions) {
+                adds = data_.addExtensionXcuAdditions(url, layer);
+            }
+            try {
+                parseFileLeniently(parseFile, url, layer, nullptr, nullptr, adds);
+            } catch (const css::container::NoSuchElementException &) {
+                TOOLS_WARN_EXCEPTION("configmgr", "file does not exist");
+                if (adds != nullptr) {
+                    data_.removeExtensionXcuAdditions(url);
+                }
+            }
+        }
+        if (i == -1) {
+            break;
+        }
+    }
+}
+
+void Components::parseXcdFiles(int layer, OUString const & url) {
+    osl::Directory dir(url);
+    switch (dir.open()) {
+    case osl::FileBase::E_None:
+        break;
+    case osl::FileBase::E_NOENT:
+        return;
+    default:
+        throw css::uno::RuntimeException(
+            "cannot open directory " + url);
+    }
+    UnresolvedVector unres;
+    std::set< OUString > existingDeps;
+    std::set< OUString > processedDeps;
+    for (;;) {
+        osl::DirectoryItem i;
+        osl::FileBase::RC rc = dir.getNextItem(i, SAL_MAX_UINT32);
+        if (rc == osl::FileBase::E_NOENT) {
+            break;
+        }
+        if (rc != osl::FileBase::E_None) {
+            throw css::uno::RuntimeException(
+                "cannot iterate directory " + url);
+        }
+        osl::FileStatus stat(
+            osl_FileStatus_Mask_Type | osl_FileStatus_Mask_FileName |
+            osl_FileStatus_Mask_FileURL);
+        if (i.getFileStatus(stat) != osl::FileBase::E_None) {
+            throw css::uno::RuntimeException(
+                "cannot stat in directory " + url);
+        }
+        if (stat.getFileType() != osl::FileStatus::Directory) { //TODO: symlinks
+            OUString file(stat.getFileName());
+            OUString name;
+            if (file.endsWith(".xcd", &name)) {
+                existingDeps.insert(name);
+                rtl::Reference< ParseManager > manager;
+                try {
+                    manager = new ParseManager(
+                        stat.getFileURL(),
+                        new XcdParser(layer, processedDeps, data_));
+                } catch (css::container::NoSuchElementException & e) {
+                    if (stat.getFileType() == osl::FileStatus::Link) {
+                        SAL_WARN("configmgr", "dangling link <" << stat.getFileURL() << ">");
+                        continue;
+                    }
+                    throw css::uno::RuntimeException(
+                        "stat'ed file does not exist: " + e.Message);
+                }
+                if (manager->parse(nullptr)) {
+                    processedDeps.insert(name);
+                } else {
+                    unres.emplace_back(name, manager);
+                }
+            }
+        }
+    }
+    while (!unres.empty()) {
+        bool resolved = false;
+        for (UnresolvedVector::iterator i(unres.begin()); i != unres.end();) {
+            if (i->manager->parse(&existingDeps)) {
+                processedDeps.insert(i->name);
+                i = unres.erase(i);
+                resolved = true;
+            } else {
+                ++i;
+            }
+        }
+        if (!resolved) {
+            throw css::uno::RuntimeException(
+                "xcd: unresolved dependencies in " + url);
+        }
+    }
+}
+
+void Components::parseXcsXcuLayer(int layer, OUString const & url) {
+    parseXcdFiles(layer, url);
+    parseFiles(layer, ".xcs", &parseXcsFile, url + "/schema", false);
+    parseFiles(layer + 1, ".xcu", &parseXcuFile, url + "/data", false);
+}
+
+void Components::parseXcsXcuIniLayer(
+    int layer, OUString const & url, bool recordAdditions)
+{
+    // Check if ini file exists (otherwise .override would still read global
+    // SCHEMA/DATA variables, which could interfere with unrelated environment
+    // variables):
+    if (rtl::Bootstrap(url).getHandle() == nullptr)        return;
+
+    OUStringBuffer prefix("${.override:");
+    for (sal_Int32 i = 0; i != url.getLength(); ++i) {
+        sal_Unicode c = url[i];
+        switch (c) {
+        case '$':
+        case ':':
+        case '\\':
+            prefix.append('\\');
+            [[fallthrough]];
+        default:
+            prefix.append(c);
+        }
+    }
+    prefix.append(':');
+    OUString urls(prefix + "SCHEMA}");
+    rtl::Bootstrap::expandMacros(urls);
+    if (!urls.isEmpty()) {
+        parseFileList(layer, &parseXcsFile, urls, false);
+    }
+    urls = prefix.makeStringAndClear() + "DATA}";
+    rtl::Bootstrap::expandMacros(urls);
+    if (!urls.isEmpty()) {
+        parseFileList(layer + 1, &parseXcuFile, urls, recordAdditions);
+    }
+}
+
+void Components::parseResLayer(int layer, std::u16string_view url) {
+    OUString resUrl(OUString::Concat(url) + "/res");
+    parseXcdFiles(layer, resUrl);
+    parseFiles(layer, ".xcu", &parseXcuFile, resUrl, false);
+}
+
+void Components::parseModificationLayer(int layer, OUString const & url) {
+    try {
+        parseFileLeniently(&parseXcuFile, url, layer, nullptr, nullptr, nullptr);
+    } catch (css::container::NoSuchElementException &) {
+        SAL_INFO(
+            "configmgr", "user registrymodifications.xcu does not (yet) exist");
+        // Migrate old user layer data (can be removed once migration is no
+        // longer relevant, probably OOo 4; also see hack for xsi namespace in
+        // xmlreader::XmlReader::registerNamespaceIri):
+        parseFiles(
+            layer, ".xcu", &parseXcuFile,
+            expand(
+                "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap")
+                ":UserInstallation}/user/registry/data"),
+            false);
+    }
+}
+
+int Components::getExtensionLayer(bool shared) const {
+    int layer = shared ? sharedExtensionLayer_ : userExtensionLayer_;
+    if (layer == -1) {
+        throw css::uno::RuntimeException(
+            "insert extension xcs/xcu file into undefined layer");
+    }
+    return layer;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/components.hxx b/configmgr/source/components.hxx
new file mode 100644
index 000000000..5d7b6b596
--- /dev/null
+++ b/configmgr/source/components.hxx
@@ -0,0 +1,166 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+#include <string_view>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <rtl/ref.hxx>
+#include <o3tl/sorted_vector.hxx>
+
+#include "additions.hxx"
+#include "data.hxx"
+#include "modifications.hxx"
+
+namespace com::sun::star {
+    namespace beans { class XPropertySet; }
+    namespace uno {
+        class Any;
+        class XComponentContext;
+    }
+}
+
+namespace configmgr {
+
+class Broadcaster;
+class Node;
+class Partial;
+class RootAccess;
+
+class Components {
+public:
+    static Components & getSingleton(
+        css::uno::Reference< css::uno::XComponentContext > const & context);
+
+    static bool allLocales(std::u16string_view locale);
+
+    rtl::Reference< Node > resolvePathRepresentation(
+        OUString const & pathRepresentation,
+        OUString * canonicRepresentation, std::vector<OUString> * path, int * finalizedLayer)
+        const;
+
+    rtl::Reference< Node > getTemplate( OUString const & fullName) const;
+
+    void addRootAccess(rtl::Reference< RootAccess > const & access);
+
+    void removeRootAccess(RootAccess * access);
+
+    void initGlobalBroadcaster(
+        Modifications const & modifications,
+        rtl::Reference< RootAccess > const & exclude,
+        Broadcaster * broadcaster);
+
+    void addModification(std::vector<OUString> const & path);
+
+    void writeModifications();
+
+    void flushModifications();
+        // must be called with configmgr::lock unacquired; must be called before
+        // shutdown if writeModifications has ever been called (probably
+        // indirectly, via removeExtensionXcuFile)
+
+    void insertExtensionXcsFile(bool shared, OUString const & fileUri);
+
+    void insertExtensionXcuFile(
+        bool shared, OUString const & fileUri,
+        Modifications * modifications);
+
+    void removeExtensionXcuFile(
+        OUString const & fileUri, Modifications * modifications);
+
+    void insertModificationXcuFile(
+        OUString const & fileUri,
+        std::set< OUString > const & includedPaths,
+        std::set< OUString > const & excludedPaths,
+        Modifications * modifications);
+
+    css::beans::Optional< css::uno::Any >
+    getExternalValue(std::u16string_view descriptor);
+
+private:
+    Components(const Components&) = delete;
+    Components& operator=(const Components&) = delete;
+
+    typedef void FileParser(
+        OUString const &, int, Data &, Partial const *, Modifications *,
+        Additions *);
+public:
+    explicit Components(
+        css::uno::Reference< css::uno::XComponentContext > const & context);
+
+    ~Components();
+private:
+
+    void parseFileLeniently(
+        FileParser * parseFile, OUString const & url, int layer,
+        Partial const * partial, Modifications * modifications,
+        Additions * additions);
+
+    void parseFiles(
+        int layer, OUString const & extension, FileParser * parseFile,
+        OUString const & url, bool recursive);
+
+    void parseFileList(
+        int layer, FileParser * parseFile, std::u16string_view urls,
+        bool recordAdditions);
+
+    void parseXcdFiles(int layer, OUString const & url);
+
+    void parseXcsXcuLayer(int layer, OUString const & url);
+
+    void parseXcsXcuIniLayer(
+        int layer, OUString const & url, bool recordAdditions);
+
+    void parseResLayer(int layer, std::u16string_view url);
+
+    void parseModificationLayer(int layer, OUString const & url);
+
+    int getExtensionLayer(bool shared) const;
+
+    typedef
+        config_map<
+            css::uno::Reference<
+                css::beans::XPropertySet > >
+        ExternalServices;
+
+    class WriteThread;
+
+    enum class ModificationTarget { None, File, Dconf };
+
+    css::uno::Reference< css::uno::XComponentContext >
+        context_;
+    Data data_;
+    o3tl::sorted_vector< RootAccess * > roots_;
+    ExternalServices externalServices_;
+    rtl::Reference< WriteThread > writeThread_;
+    int sharedExtensionLayer_;
+    int userExtensionLayer_;
+    ModificationTarget modificationTarget_;
+    OUString modificationFileUrl_;
+    std::shared_ptr<osl::Mutex> lock_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/config_map.hxx b/configmgr/source/config_map.hxx
new file mode 100644
index 000000000..5d2990d5a
--- /dev/null
+++ b/configmgr/source/config_map.hxx
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#ifndef CONFIG_MAP_HXX
+#define CONFIG_MAP_HXX
+
+#include <map>
+#include <rtl/ustring.hxx>
+
+// The realisation here is that while a map is a reasonably compact
+// representation, there is often no need to have it completely
+// sorted, so we can use a fast in-line length comparison as the
+// initial compare, rather than sorting of sub string contents.
+
+struct LengthContentsCompare
+{
+    bool operator()(std::u16string_view a, std::u16string_view b) const
+    {
+        if (a.size() == b.size())
+            return a < b;
+        else
+            return a.size() < b.size();
+    }
+};
+
+template <class T> struct config_map : public std::map<OUString, T, LengthContentsCompare>
+{
+};
+
+#endif // CONFIG_MAP_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/configmgr.component b/configmgr/source/configmgr.component
new file mode 100644
index 000000000..ff46b6070
--- /dev/null
+++ b/configmgr/source/configmgr.component
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.configuration.ConfigurationProvider"
+    constructor="com_sun_star_comp_configuration_ConfigurationProvider_get_implementation">
+    <service name="com.sun.star.configuration.ConfigurationProvider"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.configuration.ConfigurationRegistry"
+    constructor="com_sun_star_comp_configuration_ConfigurationRegistry_get_implementation">
+    <service name="com.sun.star.configuration.ConfigurationRegistry"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.configuration.DefaultProvider"
+    constructor="com_sun_star_comp_configuration_DefaultProvider_get_implementation"
+    single-instance="true">
+    <service name="com.sun.star.configuration.DefaultProvider"/>
+    <singleton name="com.sun.star.configuration.theDefaultProvider"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.configuration.ReadOnlyAccess"
+    constructor="com_sun_star_comp_configuration_ReadOnlyAccess_get_implementation">
+    <service name="com.sun.star.configuration.ReadOnlyAccess"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.configuration.ReadWriteAccess"
+    constructor="com_sun_star_comp_configuration_ReadWriteAccess_get_implementation">
+    <service name="com.sun.star.configuration.ReadWriteAccess"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.configuration.Update"
+    constructor="com_sun_star_comp_configuration_Update_get_implementation">
+    <service name="com.sun.star.configuration.Update_Service"/>
+    <singleton name="com.sun.star.configuration.Update"/>
+  </implementation>
+</component>
diff --git a/configmgr/source/configurationprovider.cxx b/configmgr/source/configurationprovider.cxx
new file mode 100644
index 000000000..b8bdcb426
--- /dev/null
+++ b/configmgr/source/configurationprovider.cxx
@@ -0,0 +1,403 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/lang/Locale.hpp>
+#include <com/sun/star/lang/XLocalizable.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/util/XFlushListener.hpp>
+#include <com/sun/star/util/XFlushable.hpp>
+#include <com/sun/star/util/XRefreshListener.hpp>
+#include <com/sun/star/util/XRefreshable.hpp>
+#include <cppu/unotype.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/mutex.hxx>
+#include <sal/types.h>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+
+#include <i18nlangtag/languagetag.hxx>
+#include <utility>
+
+#include "components.hxx"
+#include "configurationprovider.hxx"
+#include "lock.hxx"
+#include "defaultprovider.hxx"
+#include "rootaccess.hxx"
+
+namespace configmgr::configuration_provider {
+
+namespace {
+
+constexpr OUStringLiteral accessServiceName =
+    u"com.sun.star.configuration.ConfigurationAccess";
+constexpr OUStringLiteral updateAccessServiceName =
+    u"com.sun.star.configuration.ConfigurationUpdateAccess";
+
+void badNodePath() {
+    throw css::uno::Exception(
+        ("com.sun.star.configuration.ConfigurationProvider expects a single,"
+         " non-empty, string nodepath argument"),
+        nullptr);
+}
+
+typedef
+    cppu::WeakComponentImplHelper<
+        css::lang::XServiceInfo, css::lang::XMultiServiceFactory,
+        css::util::XRefreshable, css::util::XFlushable,
+        css::lang::XLocalizable >
+    ServiceBase;
+
+class Service:
+    private cppu::BaseMutex, public ServiceBase
+{
+public:
+    explicit Service(
+        const css::uno::Reference< css::uno::XComponentContext >& context):
+        ServiceBase(m_aMutex), context_(context), default_(true),
+        lock_( lock() )
+    {
+        assert(context.is());
+    }
+
+    Service(
+        const css::uno::Reference< css::uno::XComponentContext >& context,
+        OUString locale):
+        ServiceBase(m_aMutex), context_(context), locale_(std::move(locale)),
+        default_(false),
+        lock_( lock() )
+    {
+        assert(context.is());
+    }
+
+private:
+    Service(const Service&) = delete;
+    Service& operator=(const Service&) = delete;
+
+    virtual ~Service() override {}
+
+    virtual void SAL_CALL disposing() override { flushModifications(); }
+
+    virtual OUString SAL_CALL getImplementationName() override
+    {
+        return default_
+            ? default_provider::getImplementationName()
+            : "com.sun.star.comp.configuration.ConfigurationProvider";
+    }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
+    { return cppu::supportsService(this, ServiceName); }
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override
+    {
+        return default_
+            ? default_provider::getSupportedServiceNames()
+            : css::uno::Sequence<OUString> { "com.sun.star.configuration.ConfigurationProvider" };
+    }
+
+    virtual css::uno::Reference< css::uno::XInterface > SAL_CALL createInstance(
+        OUString const & aServiceSpecifier) override;
+
+    virtual css::uno::Reference< css::uno::XInterface > SAL_CALL
+    createInstanceWithArguments(
+        OUString const & ServiceSpecifier,
+        css::uno::Sequence< css::uno::Any > const & Arguments) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getAvailableServiceNames() override;
+
+    virtual void SAL_CALL refresh() override;
+
+    virtual void SAL_CALL addRefreshListener(
+        css::uno::Reference< css::util::XRefreshListener > const & l) override;
+
+    virtual void SAL_CALL removeRefreshListener(
+        css::uno::Reference< css::util::XRefreshListener > const & l) override;
+
+    virtual void SAL_CALL flush() override;
+
+    virtual void SAL_CALL addFlushListener(
+        css::uno::Reference< css::util::XFlushListener > const & l) override;
+
+    virtual void SAL_CALL removeFlushListener(
+        css::uno::Reference< css::util::XFlushListener > const & l) override;
+
+    virtual void SAL_CALL setLocale(css::lang::Locale const & eLocale) override;
+
+    virtual css::lang::Locale SAL_CALL getLocale() override;
+
+    void flushModifications() const;
+
+    css::uno::Reference< css::uno::XComponentContext > context_;
+    OUString locale_;
+    bool default_;
+    std::shared_ptr<osl::Mutex> lock_;
+};
+
+css::uno::Reference< css::uno::XInterface > Service::createInstance(
+    OUString const & aServiceSpecifier)
+{
+    return createInstanceWithArguments(
+        aServiceSpecifier, css::uno::Sequence< css::uno::Any >());
+}
+
+css::uno::Reference< css::uno::XInterface >
+Service::createInstanceWithArguments(
+    OUString const & ServiceSpecifier,
+    css::uno::Sequence< css::uno::Any > const & Arguments)
+{
+    OUString nodepath;
+    OUString locale;
+    for (sal_Int32 i = 0; i < Arguments.getLength(); ++i) {
+        css::beans::NamedValue v1;
+        css::beans::PropertyValue v2;
+        OUString name;
+        css::uno::Any value;
+        if (Arguments[i] >>= v1) {
+            name = v1.Name;
+            value = v1.Value;
+        } else if (Arguments[i] >>= v2) {
+            name = v2.Name;
+            value = v2.Value;
+        } else if (Arguments.getLength() == 1 && (Arguments[i] >>= nodepath)) {
+            // For backwards compatibility, allow a single string argument that
+            // denotes nodepath.
+            if (nodepath.isEmpty()) {
+                badNodePath();
+            }
+            break;
+        } else {
+            throw css::uno::Exception(
+                ("com.sun.star.configuration.ConfigurationProvider expects"
+                 " NamedValue or PropertyValue arguments"),
+                nullptr);
+        }
+        // For backwards compatibility, allow "nodepath" and "Locale" in any
+        // case:
+        if (name.equalsIgnoreAsciiCase("nodepath")) {
+            if (!nodepath.isEmpty() || !(value >>= nodepath) ||
+                nodepath.isEmpty())
+            {
+                badNodePath();
+            }
+        } else if (name.equalsIgnoreAsciiCase("locale")) {
+            if (!locale.isEmpty() || !(value >>= locale) ||
+                locale.isEmpty())
+            {
+                throw css::uno::Exception(
+                    ("com.sun.star.configuration.ConfigurationProvider expects"
+                     " at most one, non-empty, string Locale argument"),
+                    nullptr);
+            }
+        }
+    }
+    if (nodepath.isEmpty()) {
+        badNodePath();
+    }
+    // For backwards compatibility, allow a nodepath that misses the leading
+    // slash:
+    if (nodepath[0] != '/') {
+        nodepath = "/" + nodepath;
+    }
+    if (locale.isEmpty()) {
+        //TODO: should the Access use the dynamically changing locale_ instead?
+        locale = locale_;
+        if (locale.isEmpty()) {
+            locale = "en-US";
+        }
+    }
+    bool update;
+    if (ServiceSpecifier == accessServiceName) {
+        update = false;
+    } else if (ServiceSpecifier == updateAccessServiceName) {
+        update = true;
+    } else {
+        throw css::uno::Exception(
+            ("com.sun.star.configuration.ConfigurationProvider does not support"
+             " service " + ServiceSpecifier),
+            static_cast< cppu::OWeakObject * >(this));
+    }
+    osl::MutexGuard guard(*lock_);
+    Components & components = Components::getSingleton(context_);
+    rtl::Reference root(
+        new RootAccess(components, nodepath, locale, update));
+    if (root->isValue()) {
+        throw css::uno::Exception(
+            ("com.sun.star.configuration.ConfigurationProvider: there is a leaf"
+             " value at nodepath " + nodepath),
+            static_cast< cppu::OWeakObject * >(this));
+    }
+    components.addRootAccess(root);
+    return static_cast< cppu::OWeakObject * >(root.get());
+}
+
+css::uno::Sequence< OUString > Service::getAvailableServiceNames()
+{
+    return { accessServiceName, updateAccessServiceName };
+}
+
+void Service::refresh() {
+    //TODO
+    cppu::OInterfaceContainerHelper * cont = rBHelper.getContainer(
+        cppu::UnoType< css::util::XRefreshListener >::get());
+    if (cont != nullptr) {
+        css::lang::EventObject ev(static_cast< cppu::OWeakObject * >(this));
+        cont->notifyEach(&css::util::XRefreshListener::refreshed, ev);
+    }
+}
+
+void Service::addRefreshListener(
+    css::uno::Reference< css::util::XRefreshListener > const & l)
+{
+    rBHelper.addListener(
+        cppu::UnoType< css::util::XRefreshListener >::get(), l);
+}
+
+void Service::removeRefreshListener(
+    css::uno::Reference< css::util::XRefreshListener > const & l)
+{
+    rBHelper.removeListener(
+        cppu::UnoType< css::util::XRefreshListener >::get(), l);
+}
+
+void Service::flush() {
+    flushModifications();
+    cppu::OInterfaceContainerHelper * cont = rBHelper.getContainer(
+        cppu::UnoType< css::util::XFlushListener >::get());
+    if (cont != nullptr) {
+        css::lang::EventObject ev(static_cast< cppu::OWeakObject * >(this));
+        cont->notifyEach(&css::util::XFlushListener::flushed, ev);
+    }
+}
+
+void Service::addFlushListener(
+    css::uno::Reference< css::util::XFlushListener > const & l)
+{
+    rBHelper.addListener(cppu::UnoType< css::util::XFlushListener >::get(), l);
+}
+
+void Service::removeFlushListener(
+    css::uno::Reference< css::util::XFlushListener > const & l)
+{
+    rBHelper.removeListener(
+        cppu::UnoType< css::util::XFlushListener >::get(), l);
+}
+
+void Service::setLocale(css::lang::Locale const & eLocale)
+{
+    osl::MutexGuard guard(*lock_);
+    locale_ = LanguageTag::convertToBcp47( eLocale, false);
+}
+
+css::lang::Locale Service::getLocale() {
+    osl::MutexGuard guard(*lock_);
+    css::lang::Locale loc;
+    if (! locale_.isEmpty()) {
+        loc = LanguageTag::convertToLocale( locale_, false);
+    }
+    return loc;
+}
+
+void Service::flushModifications() const {
+    Components * components;
+    {
+        osl::MutexGuard guard(*lock_);
+        components = &Components::getSingleton(context_);
+    }
+    components->flushModifications();
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_configuration_ConfigurationProvider_get_implementation(
+    css::uno::XComponentContext* Context, css::uno::Sequence<css::uno::Any> const& Arguments)
+{
+    if (!Arguments.hasElements()) {
+        auto p = css::configuration::theDefaultProvider::get(Context);
+        p->acquire();
+        return p.get();
+    } else {
+        OUString locale;
+        for (sal_Int32 i = 0; i < Arguments.getLength(); ++i) {
+            css::beans::NamedValue v1;
+            css::beans::PropertyValue v2;
+            OUString name;
+            css::uno::Any value;
+            if (Arguments[i] >>= v1) {
+                name = v1.Name;
+                value = v1.Value;
+            } else if (Arguments[i] >>= v2) {
+                name = v2.Name;
+                value = v2.Value;
+            } else {
+                throw css::uno::Exception(
+                    ("com.sun.star.configuration.ConfigurationProvider factory"
+                     " expects NamedValue or PropertyValue arguments"),
+                    nullptr);
+            }
+            // For backwards compatibility, allow "Locale" and (ignored)
+            // "EnableAsync" in any case:
+            if (name.equalsIgnoreAsciiCase("locale")) {
+                if (!locale.isEmpty() || !(value >>= locale) ||
+                    locale.isEmpty())
+                {
+                    throw css::uno::Exception(
+                        ("com.sun.star.configuration.ConfigurationProvider"
+                         " factory expects at most one, non-empty, string"
+                         " Locale argument"),
+                        nullptr);
+                }
+            } else if (!name.equalsIgnoreAsciiCase("enableasync")) {
+                throw css::uno::Exception(
+                    ("com.sun.star.configuration.ConfigurationProvider factory:"
+                     " unknown argument " + name),
+                    nullptr);
+            }
+        }
+        return cppu::acquire(new Service(Context, locale));
+    }
+}
+
+}
+
+css::uno::Reference< css::uno::XInterface > createDefault(
+    css::uno::Reference< css::uno::XComponentContext > const & context)
+{
+    return static_cast< cppu::OWeakObject * >(new Service(context));
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/configurationprovider.hxx b/configmgr/source/configurationprovider.hxx
new file mode 100644
index 000000000..96d40b895
--- /dev/null
+++ b/configmgr/source/configurationprovider.hxx
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+
+namespace com::sun::star {
+    namespace uno {
+        class XComponentContext;
+        class XInterface;
+    }
+}
+
+namespace configmgr::configuration_provider {
+
+css::uno::Reference< css::uno::XInterface > createDefault(
+    css::uno::Reference< css::uno::XComponentContext >
+        const & context);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/configurationregistry.cxx b/configmgr/source/configurationregistry.cxx
new file mode 100644
index 000000000..b2fd214f3
--- /dev/null
+++ b/configmgr/source/configurationregistry.cxx
@@ -0,0 +1,641 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/container/NoSuchElementException.hpp>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/registry/InvalidRegistryException.hpp>
+#include <com/sun/star/registry/InvalidValueException.hpp>
+#include <com/sun/star/registry/RegistryKeyType.hpp>
+#include <com/sun/star/registry/RegistryValueType.hpp>
+#include <com/sun/star/registry/XRegistryKey.hpp>
+#include <com/sun/star/registry/XSimpleRegistry.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/DeploymentException.hpp>
+#include <com/sun/star/uno/Exception.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/Type.hxx>
+#include <com/sun/star/uno/TypeClass.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/util/XFlushable.hpp>
+#include <cppu/unotype.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weak.hxx>
+#include <mutex>
+#include <rtl/ustring.hxx>
+#include <utility>
+#include <sal/types.h>
+
+namespace com::sun::star::util {
+    class XFlushListener;
+}
+
+namespace configmgr::configuration_registry {
+
+namespace {
+
+class Service:
+    public cppu::WeakImplHelper<
+        css::lang::XServiceInfo, css::registry::XSimpleRegistry,
+        css::util::XFlushable >
+{
+public:
+    explicit Service(css::uno::Reference< css::uno::XComponentContext > const & context);
+
+private:
+    Service(const Service&) = delete;
+    Service& operator=(const Service&) = delete;
+
+    virtual ~Service() override {}
+
+    virtual OUString SAL_CALL getImplementationName() override
+    { return "com.sun.star.comp.configuration.ConfigurationRegistry"; }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
+    { return cppu::supportsService(this, ServiceName); }
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override
+    { return { "com.sun.star.configuration.ConfigurationRegistry" }; }
+
+    virtual OUString SAL_CALL getURL() override;
+
+    virtual void SAL_CALL open(
+        OUString const & rURL, sal_Bool bReadOnly, sal_Bool) override;
+
+    virtual sal_Bool SAL_CALL isValid() override;
+
+    virtual void SAL_CALL close() override;
+
+    virtual void SAL_CALL destroy() override;
+
+    virtual css::uno::Reference< css::registry::XRegistryKey > SAL_CALL
+    getRootKey() override;
+
+    virtual sal_Bool SAL_CALL isReadOnly() override;
+
+    virtual void SAL_CALL mergeKey(OUString const &, OUString const &) override;
+
+    virtual void SAL_CALL flush() override;
+
+    virtual void SAL_CALL addFlushListener(
+        css::uno::Reference< css::util::XFlushListener > const &) override;
+
+    virtual void SAL_CALL removeFlushListener(
+        css::uno::Reference< css::util::XFlushListener > const &) override;
+
+    void checkValid();
+
+    void checkValid_RuntimeException();
+
+    void doClose();
+
+    css::uno::Reference< css::lang::XMultiServiceFactory > provider_;
+    std::mutex mutex_;
+    css::uno::Reference< css::uno::XInterface > access_;
+    OUString url_;
+    bool readOnly_;
+
+    friend class RegistryKey;
+};
+
+class RegistryKey:
+    public cppu::WeakImplHelper< css::registry::XRegistryKey >
+{
+public:
+    RegistryKey(Service & service, css::uno::Any value):
+        service_(service), value_(std::move(value)) {}
+
+private:
+    RegistryKey(const RegistryKey&) = delete;
+    RegistryKey& operator=(const RegistryKey&) = delete;
+
+    virtual ~RegistryKey() override {}
+
+    virtual OUString SAL_CALL getKeyName() override;
+
+    virtual sal_Bool SAL_CALL isReadOnly() override;
+
+    virtual sal_Bool SAL_CALL isValid() override;
+
+    virtual css::registry::RegistryKeyType SAL_CALL getKeyType(
+        OUString const &) override;
+
+    virtual css::registry::RegistryValueType SAL_CALL getValueType() override;
+
+    virtual sal_Int32 SAL_CALL getLongValue() override;
+
+    virtual void SAL_CALL setLongValue(sal_Int32) override;
+
+    virtual css::uno::Sequence< sal_Int32 > SAL_CALL getLongListValue() override;
+
+    virtual void SAL_CALL setLongListValue(
+        css::uno::Sequence< sal_Int32 > const &) override;
+
+    virtual OUString SAL_CALL getAsciiValue() override;
+
+    virtual void SAL_CALL setAsciiValue(OUString const &) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL getAsciiListValue() override;
+
+    virtual void SAL_CALL setAsciiListValue(
+        css::uno::Sequence< OUString > const &) override;
+
+    virtual OUString SAL_CALL getStringValue() override;
+
+    virtual void SAL_CALL setStringValue(OUString const &) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL getStringListValue() override;
+
+    virtual void SAL_CALL setStringListValue(
+        css::uno::Sequence< OUString > const &) override;
+
+    virtual css::uno::Sequence< sal_Int8 > SAL_CALL getBinaryValue() override;
+
+    virtual void SAL_CALL setBinaryValue(css::uno::Sequence< sal_Int8 > const &) override;
+
+    virtual css::uno::Reference< css::registry::XRegistryKey > SAL_CALL openKey(
+        OUString const & aKeyName) override;
+
+    virtual css::uno::Reference< css::registry::XRegistryKey > SAL_CALL
+    createKey(OUString const &) override;
+
+    virtual void SAL_CALL closeKey() override;
+
+    virtual void SAL_CALL deleteKey(OUString const &) override;
+
+    virtual
+    css::uno::Sequence< css::uno::Reference< css::registry::XRegistryKey > >
+    SAL_CALL openKeys() override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL getKeyNames() override;
+
+    virtual sal_Bool SAL_CALL createLink(
+        OUString const &, OUString const &) override;
+
+    virtual void SAL_CALL deleteLink(OUString const &) override;
+
+    virtual OUString SAL_CALL getLinkTarget(OUString const &) override;
+
+    virtual OUString SAL_CALL getResolvedName(
+        OUString const & aKeyName) override;
+
+    Service & service_;
+    css::uno::Any value_;
+};
+
+Service::Service(
+    css::uno::Reference< css::uno::XComponentContext > const & context)
+    : readOnly_(false)
+{
+    assert(context.is());
+    try {
+        provider_.set(
+            context->getServiceManager()->createInstanceWithContext(
+                "com.sun.star.configuration.DefaultProvider", context),
+            css::uno::UNO_QUERY_THROW);
+    } catch (css::uno::RuntimeException &) {
+        throw;
+    } catch (css::uno::Exception & e) {
+        throw css::uno::DeploymentException(
+            ("component context fails to supply service"
+             " com.sun.star.configuration.DefaultProvider of type"
+             " com.sun.star.lang.XMultiServiceFactory: " + e.Message),
+            context);
+    }
+}
+
+OUString Service::getURL() {
+    std::unique_lock g(mutex_);
+    checkValid_RuntimeException();
+    return url_;
+}
+
+void Service::open(OUString const & rURL, sal_Bool bReadOnly, sal_Bool)
+{
+    //TODO: bCreate
+    std::unique_lock g(mutex_);
+    if (access_.is()) {
+        doClose();
+    }
+    css::uno::Sequence< css::uno::Any > args{ css::uno::Any(
+        css::beans::NamedValue("nodepath", css::uno::Any(rURL))) };
+    try {
+        access_ = provider_->createInstanceWithArguments(
+            (bReadOnly
+             ? OUString("com.sun.star.configuration.ConfigurationAccess")
+             : OUString(
+                 "com.sun.star.configuration.ConfigurationUpdateAccess")),
+            args);
+    } catch (css::uno::RuntimeException &) {
+        throw;
+    } catch (css::uno::Exception & e) {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException(
+            "com.sun.star.configuration.ConfigurationRegistry: open failed: " +
+            e.Message,
+            static_cast< cppu::OWeakObject * >(this), anyEx );
+    }
+    url_ = rURL;
+    readOnly_ = bReadOnly;
+}
+
+sal_Bool Service::isValid() {
+    std::unique_lock g(mutex_);
+    return access_.is();
+}
+
+void Service::close()
+{
+    std::unique_lock g(mutex_);
+    checkValid();
+    doClose();
+}
+
+void Service::destroy()
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Reference< css::registry::XRegistryKey > Service::getRootKey()
+{
+    std::unique_lock g(mutex_);
+    checkValid();
+    return new RegistryKey(*this, css::uno::Any(access_));
+}
+
+sal_Bool Service::isReadOnly() {
+    std::unique_lock g(mutex_);
+    checkValid_RuntimeException();
+    return readOnly_;
+}
+
+void Service::mergeKey(OUString const &, OUString const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void Service::flush()
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void Service::addFlushListener(
+    css::uno::Reference< css::util::XFlushListener > const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void Service::removeFlushListener(
+    css::uno::Reference< css::util::XFlushListener > const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void Service::checkValid() {
+    if (!access_.is()) {
+        throw css::registry::InvalidRegistryException(
+            "com.sun.star.configuration.ConfigurationRegistry: not valid",
+            static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+void Service::checkValid_RuntimeException() {
+    if (!access_.is()) {
+        throw css::uno::RuntimeException(
+            "com.sun.star.configuration.ConfigurationRegistry: not valid",
+            static_cast< cppu::OWeakObject * >(this));
+    }
+}
+
+void Service::doClose() {
+    access_.clear();
+}
+
+OUString RegistryKey::getKeyName() {
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+    css::uno::Reference< css::container::XNamed > named;
+    if (value_ >>= named) {
+        return named->getName();
+    }
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+sal_Bool RegistryKey::isReadOnly()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+    return service_.readOnly_; //TODO: read-only sub-nodes in update access?
+}
+
+sal_Bool RegistryKey::isValid() {
+    return service_.isValid();
+}
+
+css::registry::RegistryKeyType RegistryKey::getKeyType(OUString const &)
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    return css::registry::RegistryKeyType_KEY;
+}
+
+css::registry::RegistryValueType RegistryKey::getValueType()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    css::uno::Type t(value_.getValueType());
+    switch (t.getTypeClass()) {
+    case css::uno::TypeClass_LONG:
+        return css::registry::RegistryValueType_LONG;
+    case css::uno::TypeClass_STRING:
+        return css::registry::RegistryValueType_STRING;
+    case css::uno::TypeClass_SEQUENCE:
+        if (t == cppu::UnoType< css::uno::Sequence< sal_Int8 > >::get()) {
+            return css::registry::RegistryValueType_BINARY;
+        } else if (t == cppu::UnoType< css::uno::Sequence< sal_Int32 > >::get())
+        {
+            return css::registry::RegistryValueType_LONGLIST;
+        } else if (t ==
+                   cppu::UnoType< css::uno::Sequence< OUString > >::get())
+        {
+            return css::registry::RegistryValueType_STRINGLIST;
+        }
+        [[fallthrough]];
+    default:
+        return css::registry::RegistryValueType_NOT_DEFINED;
+    }
+}
+
+sal_Int32 RegistryKey::getLongValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    sal_Int32 v = 0;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setLongValue(sal_Int32)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Sequence< sal_Int32 > RegistryKey::getLongListValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    css::uno::Sequence< sal_Int32 > v;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setLongListValue(css::uno::Sequence< sal_Int32 > const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+OUString RegistryKey::getAsciiValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    OUString v;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setAsciiValue(OUString const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Sequence< OUString > RegistryKey::getAsciiListValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    css::uno::Sequence< OUString > v;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setAsciiListValue(css::uno::Sequence< OUString > const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+OUString RegistryKey::getStringValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    OUString v;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setStringValue(OUString const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Sequence< OUString > RegistryKey::getStringListValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    css::uno::Sequence< OUString > v;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setStringListValue(
+    css::uno::Sequence< OUString > const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Sequence< sal_Int8 > RegistryKey::getBinaryValue()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid();
+    css::uno::Sequence< sal_Int8 > v;
+    if (value_ >>= v) {
+        return v;
+    }
+    throw css::registry::InvalidValueException(
+        "com.sun.star.configuration.ConfigurationRegistry",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::setBinaryValue(css::uno::Sequence< sal_Int8 > const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Reference< css::registry::XRegistryKey > RegistryKey::openKey(
+    OUString const & aKeyName)
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+    css::uno::Reference< css::container::XHierarchicalNameAccess > access;
+    if (value_ >>= access) {
+        try {
+            return new RegistryKey(
+                service_, access->getByHierarchicalName(aKeyName));
+        } catch (css::container::NoSuchElementException &) {}
+    }
+    return css::uno::Reference< css::registry::XRegistryKey >();
+}
+
+css::uno::Reference< css::registry::XRegistryKey > RegistryKey::createKey(
+    OUString const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+void RegistryKey::closeKey()
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+}
+
+void RegistryKey::deleteKey(OUString const &)
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Sequence< css::uno::Reference< css::registry::XRegistryKey > >
+RegistryKey::openKeys()
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+css::uno::Sequence< OUString > RegistryKey::getKeyNames()
+{
+    throw css::uno::RuntimeException(
+        "com.sun.star.configuration.ConfigurationRegistry: not implemented",
+        static_cast< cppu::OWeakObject * >(this));
+}
+
+sal_Bool RegistryKey::createLink(OUString const &, OUString const &)
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+    return false;
+}
+
+void RegistryKey::deleteLink(OUString const &)
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+}
+
+OUString RegistryKey::getLinkTarget(OUString const &)
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+    return OUString();
+}
+
+OUString RegistryKey::getResolvedName(OUString const & aKeyName)
+{
+    std::unique_lock g(service_.mutex_);
+    service_.checkValid_RuntimeException();
+    return aKeyName;
+}
+
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_configuration_ConfigurationRegistry_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new Service(context));
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/data.cxx b/configmgr/source/data.cxx
new file mode 100644
index 000000000..f173ee155
--- /dev/null
+++ b/configmgr/source/data.cxx
@@ -0,0 +1,336 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/ref.hxx>
+#include <rtl/string.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.h>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <o3tl/string_view.hxx>
+
+#include "additions.hxx"
+#include "data.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "rootnode.hxx"
+#include "setnode.hxx"
+
+namespace configmgr {
+
+namespace {
+
+bool decode(
+    std::u16string_view encoded, std::size_t begin, std::size_t end,
+    OUString * decoded)
+{
+    assert(
+        begin <= end && end <= encoded.size() &&
+        decoded != nullptr);
+    OUStringBuffer buf(end - begin);
+    while (begin != end) {
+        sal_Unicode c = encoded[begin++];
+        if (c == '&') {
+            if (o3tl::starts_with(encoded.substr(begin), u"amp;")) {
+                buf.append('&');
+                begin += RTL_CONSTASCII_LENGTH("amp;");
+            } else if (o3tl::starts_with(encoded.substr(begin), u"quot;")) {
+                buf.append('"');
+                begin += RTL_CONSTASCII_LENGTH("quot;");
+            } else if (o3tl::starts_with(encoded.substr(begin), u"apos;")) {
+                buf.append('\'');
+                begin += RTL_CONSTASCII_LENGTH("apos;");
+            } else {
+                return false;
+            }
+            assert(begin <= end);
+        } else {
+            buf.append(c);
+        }
+    }
+    *decoded = buf.makeStringAndClear();
+    return true;
+}
+
+}
+
+OUString Data::createSegment(
+    std::u16string_view templateName, OUString const & name)
+{
+    if (templateName.empty()) {
+        return name;
+    }
+    OUStringBuffer buf(128);
+    buf.append(templateName);
+        //TODO: verify template name contains no bad chars?
+    buf.append("['");
+    for (sal_Int32 i = 0; i < name.getLength(); ++i) {
+        sal_Unicode c = name[i];
+        switch (c) {
+        case '&':
+            buf.append("&amp;");
+            break;
+        case '"':
+            buf.append("&quot;");
+            break;
+        case '\'':
+            buf.append("&apos;");
+            break;
+        default:
+            buf.append(c);
+            break;
+        }
+    }
+    buf.append("']");
+    return buf.makeStringAndClear();
+}
+
+sal_Int32 Data::parseSegment(
+    OUString const & path, sal_Int32 index, OUString * name,
+    bool * setElement, OUString * templateName)
+{
+    assert(
+        index >= 0 && index <= path.getLength() && name != nullptr &&
+        setElement != nullptr);
+    sal_Int32 i = index;
+    while (i < path.getLength() && path[i] != '/' && path[i] != '[') {
+        ++i;
+    }
+    if (i == path.getLength() || path[i] == '/') {
+        *name = path.copy(index, i - index);
+        *setElement = false;
+        return i;
+    }
+    if (templateName != nullptr) {
+        if (i - index == 1 && path[index] == '*') {
+            templateName->clear();
+        } else {
+            *templateName = path.copy(index, i - index);
+        }
+    }
+    if (++i == path.getLength()) {
+        return -1;
+    }
+    sal_Unicode del = path[i++];
+    if (del != '\'' && del != '"') {
+        return -1;
+    }
+    sal_Int32 j = path.indexOf(del, i);
+    if (j == -1 || j + 1 == path.getLength() || path[j + 1] != ']' ||
+        !decode(path, i, j, name))
+    {
+        return -1;
+    }
+    *setElement = true;
+    return j + 2;
+}
+
+OUString Data::fullTemplateName(
+    std::u16string_view component, std::u16string_view name)
+{
+    if (component.find(':') != std::u16string_view::npos || name.find(':') != std::u16string_view::npos) {
+        throw css::uno::RuntimeException(
+            OUString::Concat("bad component/name pair containing colon ") + component + "/" +
+            name);
+    }
+    return OUString::Concat(component) + ":" + name;
+}
+
+bool Data::equalTemplateNames(
+    OUString const & shortName, OUString const & longName)
+{
+    if (shortName.indexOf(':') == -1) {
+        sal_Int32 i = longName.indexOf(':') + 1;
+        assert(i > 0);
+        return
+            rtl_ustr_compare_WithLength(
+                shortName.getStr(), shortName.getLength(),
+                longName.getStr() + i, longName.getLength() - i) ==
+            0;
+    } else {
+        return shortName == longName;
+    }
+}
+
+Data::Data(): root_(new RootNode) {}
+
+rtl::Reference< Node > Data::resolvePathRepresentation(
+    OUString const & pathRepresentation,
+    OUString * canonicRepresentation, std::vector<OUString> * path, int * finalizedLayer)
+    const
+{
+    if (pathRepresentation.isEmpty() || pathRepresentation[0] != '/') {
+        throw css::uno::RuntimeException(
+            "bad path " + pathRepresentation);
+    }
+    if (path != nullptr) {
+        path->clear();
+    }
+    if (pathRepresentation == "/") {
+        if (canonicRepresentation != nullptr) {
+            *canonicRepresentation = pathRepresentation;
+        }
+        if (finalizedLayer != nullptr) {
+            *finalizedLayer = NO_LAYER;
+        }
+        return root_;
+    }
+    OUString seg;
+    bool setElement;
+    OUString templateName;
+    sal_Int32 n = parseSegment(pathRepresentation, 1, &seg, &setElement, nullptr);
+    if (n == -1 || setElement)
+    {
+        throw css::uno::RuntimeException(
+            "bad path " + pathRepresentation);
+    }
+    NodeMap const & components = getComponents();
+    NodeMap::const_iterator i(components.find(seg));
+    OUStringBuffer canonic(128);
+    rtl::Reference< Node > parent;
+    int finalized = NO_LAYER;
+    for (rtl::Reference< Node > p(i == components.end() ? nullptr : i->second);;) {
+        if (!p.is()) {
+            return p;
+        }
+        if (canonicRepresentation != nullptr) {
+            canonic.append('/');
+            canonic.append(createSegment(templateName, seg));
+        }
+        if (path != nullptr) {
+            path->push_back(seg);
+        }
+        finalized = std::min(finalized, p->getFinalized());
+        if (n != pathRepresentation.getLength() &&
+            pathRepresentation[n++] != '/')
+        {
+            throw css::uno::RuntimeException(
+                "bad path " + pathRepresentation);
+        }
+        // for backwards compatibility, ignore a final slash
+        if (n == pathRepresentation.getLength()) {
+            if (canonicRepresentation != nullptr) {
+                *canonicRepresentation = canonic.makeStringAndClear();
+            }
+            if (finalizedLayer != nullptr) {
+                *finalizedLayer = finalized;
+            }
+            return p;
+        }
+        parent = p;
+        templateName.clear();
+        n = parseSegment(
+            pathRepresentation, n, &seg, &setElement, &templateName);
+        if (n == -1) {
+            throw css::uno::RuntimeException(
+                "bad path " + pathRepresentation);
+        }
+        // For backwards compatibility, allow set members to be accessed with
+        // simple path segments, like group members:
+        p = p->getMember(seg);
+        if (setElement) {
+            switch (parent->kind()) {
+            case Node::KIND_LOCALIZED_PROPERTY:
+                if (!templateName.isEmpty()) {
+                    throw css::uno::RuntimeException(
+                        "bad path " + pathRepresentation);
+                }
+                break;
+            case Node::KIND_SET:
+                if (!templateName.isEmpty() &&
+                    !static_cast< SetNode * >(parent.get())->isValidTemplate(
+                        templateName))
+                {
+                    throw css::uno::RuntimeException(
+                        "bad path " + pathRepresentation);
+                }
+                break;
+            default:
+                throw css::uno::RuntimeException(
+                    "bad path " + pathRepresentation);
+            }
+            if (!templateName.isEmpty() && p != nullptr) {
+                assert(!p->getTemplateName().isEmpty());
+                if (!equalTemplateNames(templateName, p->getTemplateName())) {
+                    throw css::uno::RuntimeException(
+                        "bad path " + pathRepresentation);
+                }
+            }
+        }
+    }
+}
+
+rtl::Reference< Node > Data::getTemplate(
+    int layer, OUString const & fullName) const
+{
+    return templates.findNode(layer, fullName);
+}
+
+NodeMap & Data::getComponents() const {
+    return root_->getMembers();
+}
+
+Additions * Data::addExtensionXcuAdditions(
+    OUString const & url, int layer)
+{
+    rtl::Reference item(new ExtensionXcu);
+    ExtensionXcuAdditions::iterator i(
+        extensionXcuAdditions_.emplace(
+                url, rtl::Reference< ExtensionXcu >()).first);
+    if (i->second.is()) {
+        throw css::uno::RuntimeException(
+            "already added extension xcu " + url);
+    }
+    i->second = item;
+    item->layer = layer;
+    return &item->additions;
+}
+
+rtl::Reference< Data::ExtensionXcu > Data::removeExtensionXcuAdditions(
+    OUString const & url)
+{
+    ExtensionXcuAdditions::iterator i(extensionXcuAdditions_.find(url));
+    if (i == extensionXcuAdditions_.end()) {
+        // This can happen, as migration of pre OOo 3.3 UserInstallation
+        // extensions in dp_registry::backend::configuration::BackendImpl::
+        // PackageImpl::processPackage_ can cause just-in-time creation of
+        // extension xcu files that are never added via addExtensionXcuAdditions
+        // (also, there might be url spelling differences between calls to
+        // addExtensionXcuAdditions and removeExtensionXcuAdditions?):
+        SAL_INFO(
+            "configmgr",
+            "unknown Data::removeExtensionXcuAdditions(" << url << ")");
+        return rtl::Reference< ExtensionXcu >();
+    }
+    rtl::Reference< ExtensionXcu > item(i->second);
+    extensionXcuAdditions_.erase(i);
+    return item;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/data.hxx b/configmgr/source/data.hxx
new file mode 100644
index 000000000..c3614e643
--- /dev/null
+++ b/configmgr/source/data.hxx
@@ -0,0 +1,99 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <climits>
+#include "config_map.hxx"
+#include <vector>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <salhelper/simplereferenceobject.hxx>
+
+#include "additions.hxx"
+#include "modifications.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr {
+
+class Node;
+
+struct Data {
+    enum { NO_LAYER = INT_MAX };
+
+    struct ExtensionXcu: public salhelper::SimpleReferenceObject {
+        int layer;
+        Additions additions;
+    };
+
+    NodeMap templates;
+
+    Modifications modifications;
+
+    static OUString createSegment(
+        std::u16string_view templateName, OUString const & name);
+
+    static sal_Int32 parseSegment(
+        OUString const & path, sal_Int32 index, OUString * name,
+        bool * setElement, OUString * templateName);
+
+    static OUString fullTemplateName(
+        std::u16string_view component, std::u16string_view name);
+
+    //TODO: better rules under which circumstances a short template name matches
+    static bool equalTemplateNames(
+        OUString const & shortName, OUString const & longName);
+
+    Data();
+
+    rtl::Reference< Node > resolvePathRepresentation(
+        OUString const & pathRepresentation,
+        OUString * canonicRepresentation, std::vector<OUString> * path, int * finalizedLayer)
+        const;
+
+    rtl::Reference< Node > getTemplate(
+        int layer, OUString const & fullName) const;
+
+    NodeMap & getComponents() const;
+
+    Additions * addExtensionXcuAdditions(
+        OUString const & url, int layer);
+
+    rtl::Reference< ExtensionXcu > removeExtensionXcuAdditions(
+        OUString const & url);
+
+private:
+    Data(const Data&) = delete;
+    Data& operator=(const Data&) = delete;
+
+    typedef config_map< rtl::Reference< ExtensionXcu > >
+        ExtensionXcuAdditions;
+
+    rtl::Reference< Node > root_;
+
+    ExtensionXcuAdditions extensionXcuAdditions_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/dconf.cxx b/configmgr/source/dconf.cxx
new file mode 100644
index 000000000..9db51fa17
--- /dev/null
+++ b/configmgr/source/dconf.cxx
@@ -0,0 +1,1598 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <cstddef>
+#include <cstring>
+#include <forward_list>
+#include <limits>
+#include <vector>
+
+extern "C" {
+    //TODO: <https://bugzilla.gnome.org/show_bug.cgi?id=754245>
+    // "common/dconf-changeset.h etc. lack extern "C" wrapper for C++", fixed on current dconf
+    // master (towards 0.40?) now with
+    // <https://gitlab.gnome.org/GNOME/dconf/-/commit/db3d4df6d1a763698f27b013dc42da8d4ae02639>
+    // "Merge branch 'wip/issue-23' into 'master'"
+#include <dconf/dconf.h>
+}
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <o3tl/safeint.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+
+#include "data.hxx"
+#include "dconf.hxx"
+#include "groupnode.hxx"
+#include "localizedpropertynode.hxx"
+#include "localizedvaluenode.hxx"
+#include "nodemap.hxx"
+#include "propertynode.hxx"
+#include "setnode.hxx"
+
+// component-data is encoded in dconf as follows:
+//
+// * The node hierarchy (starting at component nodes with names like
+//   "org.openoffice.Setup") maps to dconf paths underneath
+//   "/org/libreoffice/registry/".
+//
+// * Component, group, set, and localized property nodes map to dconf dirs,
+//   while property and localized value nodes map to dconf keys.
+//
+// * The names of nodes that are not set elements are used directly as dconf
+//   path segments.  (The syntax for node names is any non-empty sequences of
+//   any Unicode scalar values except U+0000--0008, U+000B--000C, U+000E--001F,
+//   U+002F SOLIDUS, and U+FFFE--FFFF.  TODO: "<aruiz> sberg, in general I think
+//   it'd be nice if you used path separators instead of dots though, they have
+//   meaning in dconf/gvdb world :-)"?)
+//
+// * The names of set element nodes are encoded as dconf path segments as
+//   follows: each occurrence of U+0000 NULL is replace by the three characters
+//   "\00", each occurrence of U+002F SOLIDUS is replaced by the three
+//   characters "\2F", and each occurrence of U+005C REVERSE SOLIDUS is replaced
+//   by the three characters "\5C".
+//
+// * Set elements (which must themselves be either sets or groups) map to
+//   "indirection" dconf dirs as follows:
+//
+// ** The dir must contain a key named "op" of string type, with a value of
+//    "fuse", "replace", or "remove".
+//
+// ** If "op" is "fuse" or "replace", the dir must contain exactly the following
+//    further keys and dirs:
+//
+// *** The dir must contain a key named "template" of string type, containing
+//     the full template name, encoded as follows: each occurrence of U+0000
+//     NULL is replace by the three characters "\00" and each occurrence of
+//     U+005C REVERSE SOLIDUS is replaced by the three characters "\5C".
+//
+// *** The dir must contain a dir named "content" that contains the set
+//     element's (i.e., set or group node's) real content.
+//
+// ** If "op" is "remove", the dir must contain no further keys or dirs.
+//
+// * Property and localized property value "fuse" operations map to GVariant
+//   instances as follows:
+//
+// ** Non-nillable boolean values map to GVariant boolean instances.
+//
+// ** Non-nillable short values map to GVariant int16 instances.
+//
+// ** Non-nillable int values map to GVariant int32 instances.
+//
+// ** Non-nillable long values map to GVariant int64 instances.
+//
+// ** Non-nillable double values map to GVariant double instances.
+//
+// ** Non-nillable string values map to GVariant string instances, with the
+//    following encoding: each occurrence of U+0000 NULL is replace by the three
+//    characters "\00" and each occurrence of U+005C REVERSE SOLIDUS is replaced
+//    by the three characters "\5C".
+//
+// ** Non-nillable hexbinary values map to GVariant byte array instances.
+//
+// ** Non-nillable list values recursively map to GVariant array instances.
+//
+// ** Nillable values recursively map to GVariant maybe instances.
+//
+// * Property "remove" operations map to GVariant instances of empty tuple type.
+//
+// Finalization:  The component-update.dtd allows for finalization of
+// oor:component-data, node, and prop elements, while dconf allows for locking
+// of individual keys.  That does not match, but just mark the individual Node
+// instances that correspond to individual dconf keys as finalized for
+// non-writable dconf keys.
+//
+// TODO: support "mandatory" and "external"?
+
+namespace configmgr::dconf {
+
+namespace {
+
+template<typename T> class GObjectHolder {
+public:
+    explicit GObjectHolder(T * object): object_(object) {}
+
+    ~GObjectHolder() {
+        if (object_ != nullptr) {
+            g_object_unref(object_);
+        }
+    }
+
+    T * get() const { return object_; }
+
+private:
+    GObjectHolder(GObjectHolder const &) = delete;
+    GObjectHolder& operator =(GObjectHolder const &) = delete;
+
+    T * object_;
+};
+
+class GVariantHolder {
+public:
+    explicit GVariantHolder(GVariant * variant = nullptr): variant_(variant) {}
+
+    ~GVariantHolder() { unref(); }
+
+    void reset(GVariant * variant) {
+        unref();
+        variant_ = variant;
+    }
+
+    void release() { variant_ = nullptr; }
+
+    GVariant * get() const { return variant_; }
+
+private:
+    GVariantHolder(GVariantHolder const &) = delete;
+    GVariantHolder& operator =(GVariantHolder const &) = delete;
+
+    void unref() {
+        if (variant_ != nullptr) {
+            g_variant_unref(variant_);
+        }
+    }
+
+    GVariant * variant_;
+};
+
+class GVariantTypeHolder {
+public:
+    explicit GVariantTypeHolder(GVariantType * type): type_(type) {}
+
+    ~GVariantTypeHolder() {
+        if (type_ != nullptr) {
+            g_variant_type_free(type_);
+        }
+    }
+
+    GVariantType * get() const { return type_; }
+
+private:
+    GVariantTypeHolder(GVariantTypeHolder const &) = delete;
+    GVariantTypeHolder& operator =(GVariantTypeHolder const &) = delete;
+
+    GVariantType * type_;
+};
+
+class StringArrayHolder {
+public:
+    explicit StringArrayHolder(gchar ** array): array_(array) {}
+
+    ~StringArrayHolder() { g_strfreev(array_); }
+
+    gchar ** get() const { return array_; }
+
+private:
+    StringArrayHolder(StringArrayHolder const &) = delete;
+    StringArrayHolder& operator =(StringArrayHolder const &) = delete;
+
+    gchar ** array_;
+};
+
+class ChangesetHolder {
+public:
+    explicit ChangesetHolder(DConfChangeset * changeset):
+        changeset_(changeset)
+    {}
+
+    ~ChangesetHolder() {
+        if (changeset_ != nullptr) {
+            dconf_changeset_unref(changeset_);
+        }
+    }
+
+    DConfChangeset * get() const { return changeset_; }
+
+private:
+    ChangesetHolder(ChangesetHolder const &) = delete;
+    ChangesetHolder& operator =(ChangesetHolder const &) = delete;
+
+    DConfChangeset * changeset_;
+};
+
+OString getRoot() {
+    return "/org/libreoffice/registry";
+}
+
+bool decode(OUString * string, bool slash) {
+    for (sal_Int32 i = 0;; ++i) {
+        i = string->indexOf('\\', i);
+        if (i == -1) {
+            return true;
+        }
+        if (string->match("00", i + 1)) {
+            *string = string->replaceAt(i, 3, OUStringChar(u'\0'));
+        } else if (slash && string->match("2F", i + 1)) {
+            *string = string->replaceAt(i, 3, u"/");
+        } else if (string->match("5C", i + 1)) {
+            *string = string->replaceAt(i + 1, 2, u"");
+        } else {
+            SAL_WARN("configmgr.dconf", "bad escape in " << *string);
+            return false;
+        }
+    }
+}
+
+bool getBoolean(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (!g_variant_is_of_type(variant.get(), G_VARIANT_TYPE_BOOLEAN)) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match boolean property");
+        return false;
+    }
+    *value <<= bool(g_variant_get_boolean(variant.get()));
+    return true;
+}
+
+bool getShort(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (!g_variant_is_of_type(variant.get(), G_VARIANT_TYPE_INT16)) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match short property");
+        return false;
+    }
+    *value <<= sal_Int16(g_variant_get_int16(variant.get()));
+    return true;
+}
+
+bool getInt(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (!g_variant_is_of_type(variant.get(), G_VARIANT_TYPE_INT32)) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match int property");
+        return false;
+    }
+    *value <<= sal_Int32(g_variant_get_int32(variant.get()));
+    return true;
+}
+
+bool getLong(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (!g_variant_is_of_type(variant.get(), G_VARIANT_TYPE_INT64)) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match long property");
+        return false;
+    }
+    *value <<= sal_Int64(g_variant_get_int64(variant.get()));
+    return true;
+}
+
+bool getDouble(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (!g_variant_is_of_type(variant.get(), G_VARIANT_TYPE_DOUBLE)) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match double property");
+        return false;
+    }
+    *value <<= double(g_variant_get_double(variant.get()));
+    return true;
+}
+
+bool getStringValue(
+    OString const & key, GVariantHolder const & variant, OUString * value)
+{
+    assert(value != nullptr);
+    if (!g_variant_is_of_type(variant.get(), G_VARIANT_TYPE_STRING)) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match string property");
+        return false;
+    }
+    gsize n;
+    char const * p = g_variant_get_string(variant.get(), &n);
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long string value for key " << key);
+        return false;
+    }
+    if (!rtl_convertStringToUString(
+            &value->pData, p, static_cast<sal_Int32>(n), RTL_TEXTENCODING_UTF8,
+            (RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR
+             | RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR
+             | RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR)))
+    {
+        SAL_WARN("configmgr.dconf", "non--UTF-8 string value for key " << key);
+        return false;
+    }
+    return decode(value, false);
+}
+
+bool getString(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    OUString v;
+    if (!getStringValue(key, variant, &v)) {
+        return false;
+    }
+    *value <<= v;
+    return true;
+}
+
+bool getHexbinaryValue(
+    OString const & key, GVariantHolder const & variant,
+    css::uno::Sequence<sal_Int8> * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "ay") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match hexbinary property");
+        return false;
+    }
+    gsize n;
+    gconstpointer p = g_variant_get_fixed_array(
+        variant.get(), &n, sizeof (guchar));
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long hexbinary value for key " << key);
+        return false;
+    }
+    value->realloc(static_cast<sal_Int32>(n));
+    static_assert(sizeof (sal_Int8) == sizeof (guchar), "size mismatch");
+    std::memcpy(value->getArray(), p, n * sizeof (guchar));
+        // assuming that n * sizeof (guchar) is small enough for std::size_t
+    return true;
+}
+
+bool getHexbinary(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    css::uno::Sequence<sal_Int8> v;
+    if (!getHexbinaryValue(key, variant, &v)) {
+        return false;
+    }
+    *value <<= v;
+    return true;
+}
+
+bool getBooleanList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "ab") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match boolean list property");
+        return false;
+    }
+    gsize n;
+    gconstpointer p = g_variant_get_fixed_array(
+        variant.get(), &n, sizeof (guchar));
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long boolean list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<sal_Bool> v(static_cast<sal_Int32>(n));
+    static_assert(sizeof (sal_Bool) == sizeof (guchar), "size mismatch");
+    std::memcpy(v.getArray(), p, n * sizeof (guchar));
+        // assuming that n * sizeof (guchar) is small enough for std::size_t
+    *value <<= v;
+    return true;
+}
+
+bool getShortList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "an") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match short list property");
+        return false;
+    }
+    gsize n;
+    gconstpointer p = g_variant_get_fixed_array(
+        variant.get(), &n, sizeof (gint16));
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long short list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<sal_Int16> v(static_cast<sal_Int32>(n));
+    static_assert(sizeof (sal_Int16) == sizeof (gint16), "size mismatch");
+    std::memcpy(v.getArray(), p, n * sizeof (gint16));
+        // assuming that n * sizeof (gint16) is small enough for std::size_t
+    *value <<= v;
+    return true;
+}
+
+bool getIntList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "ai") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match int list property");
+        return false;
+    }
+    gsize n;
+    gconstpointer p = g_variant_get_fixed_array(
+        variant.get(), &n, sizeof (gint32));
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long int list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<sal_Int32> v(static_cast<sal_Int32>(n));
+    static_assert(sizeof (sal_Int32) == sizeof (gint32), "size mismatch");
+    std::memcpy(v.getArray(), p, n * sizeof (gint32));
+        // assuming that n * sizeof (gint32) is small enough for std::size_t
+    *value <<= v;
+    return true;
+}
+
+bool getLongList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "ax") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match long list property");
+        return false;
+    }
+    gsize n;
+    gconstpointer p = g_variant_get_fixed_array(
+        variant.get(), &n, sizeof (gint64));
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long long list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<sal_Int64> v(static_cast<sal_Int32>(n));
+    static_assert(sizeof (sal_Int64) == sizeof (gint64), "size mismatch");
+    std::memcpy(v.getArray(), p, n * sizeof (gint64));
+        // assuming that n * sizeof (gint64) is small enough for std::size_t
+    *value <<= v;
+    return true;
+}
+
+bool getDoubleList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "ad") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match double list property");
+        return false;
+    }
+    gsize n;
+    gconstpointer p = g_variant_get_fixed_array(
+        variant.get(), &n, sizeof (gdouble));
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long double list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<double> v(static_cast<sal_Int32>(n));
+    static_assert(std::is_same<double, gdouble>::value, "type mismatch");
+    std::memcpy(v.getArray(), p, n * sizeof (gdouble));
+        // assuming that n * sizeof (gdouble) is small enough for std::size_t
+    *value <<= v;
+    return true;
+}
+
+bool getStringList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "as") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match string list property");
+        return false;
+    }
+    gsize n = g_variant_n_children(variant.get());
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long string list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<OUString> v(static_cast<sal_Int32>(n));
+    for (gsize i = 0; i != n; ++i) {
+        GVariantHolder c(g_variant_get_child_value(variant.get(), i));
+        if (!getStringValue(key, c, v.getArray() + i)) {
+            return false;
+        }
+    }
+    *value <<= v;
+    return true;
+}
+
+bool getHexbinaryList(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    if (std::strcmp(g_variant_get_type_string(variant.get()), "aay") != 0) {
+        SAL_WARN(
+            "configmgr.dconf",
+            "bad key " << key << " does not match hexbinary list property");
+        return false;
+    }
+    gsize n = g_variant_n_children(variant.get());
+    if (n > o3tl::make_unsigned(
+            std::numeric_limits<sal_Int32>::max()))
+    {
+        SAL_WARN("configmgr.dconf", "too long hexbinary list for key " << key);
+        return false;
+    }
+    css::uno::Sequence<css::uno::Sequence<sal_Int8>> v(
+        static_cast<sal_Int32>(n));
+    for (gsize i = 0; i != n; ++i) {
+        GVariantHolder c(g_variant_get_child_value(variant.get(), i));
+        if (!getHexbinaryValue(key, c, v.getArray() + i)) {
+            return false;
+        }
+    }
+    *value <<= v;
+    return true;
+}
+
+bool getAny(
+    OString const & key, GVariantHolder const & variant, css::uno::Any * value)
+{
+    char const * t = g_variant_get_type_string(variant.get());
+    if (std::strcmp(t, "b") == 0) {
+        return getBoolean(key, variant, value);
+    }
+    if (std::strcmp(t, "n") == 0) {
+        return getShort(key, variant, value);
+    }
+    if (std::strcmp(t, "i") == 0) {
+        return getInt(key, variant, value);
+    }
+    if (std::strcmp(t, "x") == 0) {
+        return getLong(key, variant, value);
+    }
+    if (std::strcmp(t, "d") == 0) {
+        return getDouble(key, variant, value);
+    }
+    if (std::strcmp(t, "s") == 0) {
+        return getString(key, variant, value);
+    }
+    if (std::strcmp(t, "ay") == 0) {
+        return getHexbinary(key, variant, value);
+    }
+    if (std::strcmp(t, "ab") == 0) {
+        return getBooleanList(key, variant, value);
+    }
+    if (std::strcmp(t, "an") == 0) {
+        return getShortList(key, variant, value);
+    }
+    if (std::strcmp(t, "ai") == 0) {
+        return getIntList(key, variant, value);
+    }
+    if (std::strcmp(t, "ax") == 0) {
+        return getLongList(key, variant, value);
+    }
+    if (std::strcmp(t, "ad") == 0) {
+        return getDoubleList(key, variant, value);
+    }
+    if (std::strcmp(t, "as") == 0) {
+        return getStringList(key, variant, value);
+    }
+    if (std::strcmp(t, "aay") == 0) {
+        return getHexbinaryList(key, variant, value);
+    }
+    SAL_WARN(
+        "configmgr.dconf", "bad key " << key << " does not match any property");
+    return false;
+}
+
+enum class ReadValue { Error, Value, Remove };
+
+ReadValue readValue(
+    GObjectHolder<DConfClient> const & client, OString const & path, Type type,
+    bool nillable, bool removable, css::uno::Any * value)
+{
+    assert(value != nullptr);
+    assert(!value->hasValue());
+    assert(!path.endsWith("/"));
+    GVariantHolder v(dconf_client_read(client.get(), path.getStr()));
+    if (v.get() == nullptr) {
+        SAL_WARN("configmgr.dconf", "cannot read key " << path);
+        return ReadValue::Error;
+    }
+    if (removable && std::strcmp(g_variant_get_type_string(v.get()), "()") == 0)
+    {
+        return ReadValue::Remove;
+    }
+    bool nil;
+    if (nillable) {
+        if (g_variant_classify(v.get()) != G_VARIANT_CLASS_MAYBE) {
+            SAL_WARN(
+                "configmgr.dconf",
+                "bad key " << path << " does not match nillable property");
+        }
+        v.reset(g_variant_get_maybe(v.get()));
+        nil = v.get() == nullptr;
+    } else {
+        nil = false;
+    }
+    if (!nil) {
+        switch (type) {
+        case TYPE_ANY:
+            if (!getAny(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_BOOLEAN:
+            if (!getBoolean(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_SHORT:
+            if (!getShort(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_INT:
+            if (!getInt(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_LONG:
+            if (!getLong(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_DOUBLE:
+            if (!getDouble(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_STRING:
+            if (!getString(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_HEXBINARY:
+            if (!getHexbinary(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_BOOLEAN_LIST:
+            if (!getBooleanList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_SHORT_LIST:
+            if (!getShortList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_INT_LIST:
+            if (!getIntList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_LONG_LIST:
+            if (!getLongList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_DOUBLE_LIST:
+            if (!getDoubleList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_STRING_LIST:
+            if (!getStringList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        case TYPE_HEXBINARY_LIST:
+            if (!getHexbinaryList(path, v, value)) {
+                return ReadValue::Error;
+            }
+            break;
+        default:
+            assert(false); // cannot happen
+        }
+    }
+    return ReadValue::Value;
+}
+
+void finalize(
+    GObjectHolder<DConfClient> const & client, OString const & path,
+    rtl::Reference<Node> const & node, int layer)
+{
+    if (!dconf_client_is_writable(client.get(), path.getStr())) {
+        node->setFinalized(layer);
+    }
+}
+
+void readDir(
+    Data & data, int layer, rtl::Reference<Node> const & node,
+    NodeMap & members, GObjectHolder<DConfClient> const & client,
+    OString const & dir)
+{
+    StringArrayHolder a(dconf_client_list(client.get(), dir.getStr(), nullptr));
+    for (char const * const * p = a.get(); *p != nullptr; ++p) {
+        std::size_t n = std::strlen(*p);
+        if (n > o3tl::make_unsigned(
+                std::numeric_limits<sal_Int32>::max()))
+        {
+            SAL_WARN("configmgr.dconf", "too long dir/key in dir " << dir);
+            continue;
+        }
+        OString s(*p, static_cast<sal_Int32>(n));
+        OString path(dir + s);
+        OUString name;
+        if (!rtl_convertStringToUString(
+                &name.pData, s.getStr(), s.getLength(), RTL_TEXTENCODING_UTF8,
+                (RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR
+                 | RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR
+                 | RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR)))
+        {
+            SAL_WARN("configmgr.dconf", "non--UTF-8 dir/key in dir " << dir);
+            continue;
+        }
+        bool isDir = name.endsWith("/", &name);
+        OUString templ;
+        bool remove;
+        bool replace;
+        if (node.is() && node->kind() == Node::KIND_SET) {
+            if (!isDir) {
+                SAL_WARN(
+                    "configmgr.dconf",
+                    "bad key " << path << " does not match set element");
+                continue;
+            }
+            if (!decode(&name, true)) {
+                continue;
+            }
+            enum class Op { None, Fuse, Replace, Remove };
+            Op op = Op::None;
+            bool content = false;
+            bool bad = false;
+            StringArrayHolder a2(
+                dconf_client_list(client.get(), path.getStr(), nullptr));
+            for (char const * const * p2 = a2.get(); *p2 != nullptr; ++p2) {
+                if (std::strcmp(*p2, "op") == 0) {
+                    OString path2(path + "op");
+                    GVariantHolder v(
+                        dconf_client_read(client.get(), path2.getStr()));
+                    if (v.get() == nullptr) {
+                        SAL_WARN(
+                            "configmgr.dconf", "cannot read key " << path2);
+                        bad = true;
+                        break;
+                    }
+                    OUString ops;
+                    if (!getStringValue(path2, v, &ops)) {
+                        bad = true;
+                        break;
+                    }
+                    if (ops == "fuse") {
+                        op = Op::Fuse;
+                    } else if (ops == "replace") {
+                        op = Op::Replace;
+                    } else if (ops == "remove") {
+                        op = Op::Remove;
+                    } else {
+                        SAL_WARN(
+                            "configmgr.dconf",
+                            "bad key " << path2 << " value " << ops);
+                        bad = true;
+                        break;
+                    }
+                } else if (std::strcmp(*p2, "template") == 0) {
+                    OString path2(path + "template");
+                    GVariantHolder v(
+                        dconf_client_read(client.get(), path2.getStr()));
+                    if (v.get() == nullptr) {
+                        SAL_WARN(
+                            "configmgr.dconf", "cannot read key " << path2);
+                        bad = true;
+                        break;
+                    }
+                    if (!getStringValue(path2, v, &templ)) {
+                        bad = true;
+                        break;
+                    }
+                    if (!static_cast<SetNode *>(node.get())->
+                        isValidTemplate(templ))
+                    {
+                        SAL_WARN(
+                            "configmgr.dconf",
+                            "bad key " << path2 << " value " << templ
+                                << " denotes unsupported set element template");
+                        bad = true;
+                        break;
+                    }
+                } else if (std::strcmp(*p2, "content/") == 0) {
+                    content = true;
+                } else {
+                    SAL_WARN(
+                        "configmgr.dconf",
+                        "bad dir/key " << p2
+                            << " in set element indirection dir " << path);
+                    bad = true;
+                    break;
+                }
+            }
+            if (bad) {
+                continue;
+            }
+            switch (op) {
+            default: // case Op::None:
+                SAL_WARN(
+                    "configmgr.dconf",
+                    "bad set element indirection dir " << path
+                        << " missing \"op\" key");
+                continue;
+            case Op::Fuse:
+            case Op::Replace:
+                if (templ.isEmpty() || !content) {
+                    SAL_WARN(
+                        "configmgr.dconf",
+                        "missing \"content\" and/or \"template\" dir/key in "
+                            "\"op\" = \"fuse\"/\"remove\" set element"
+                            " indirection dir " << path);
+                    continue;
+                }
+                path += "content/";
+                remove = false;
+                replace = op == Op::Replace;
+                break;
+            case Op::Remove:
+                if (!templ.isEmpty() || content) {
+                    SAL_WARN(
+                        "configmgr.dconf",
+                        "bad \"content\" and/or \"template\" dir/key in \"op\" "
+                            "= \"remove\" set element indirection dir "
+                            << path);
+                    continue;
+                }
+                remove = true;
+                replace = false;
+                break;
+            }
+        } else {
+            remove = false;
+            replace = false;
+        }
+        rtl::Reference<Node> member(members.findNode(layer, name));
+        bool insert = !member.is();
+        if (!remove) {
+            if (replace || insert) {
+                if (!node.is()) {
+                    SAL_WARN("configmgr.dconf", "bad unmatched " << path);
+                    continue;
+                }
+                switch (node->kind()) {
+                case Node::KIND_LOCALIZED_PROPERTY:
+                    member.set(new LocalizedValueNode(layer));
+                    break;
+                case Node::KIND_GROUP:
+                    if (!static_cast<GroupNode *>(node.get())->isExtensible()) {
+                        SAL_WARN("configmgr.dconf", "bad unmatched " << path);
+                        continue;
+                    }
+                    member.set(
+                        new PropertyNode(
+                            layer, TYPE_ANY, true, css::uno::Any(), true));
+                    break;
+                case Node::KIND_SET:
+                    assert(!templ.isEmpty());
+                    member = data.getTemplate(layer, templ);
+                    if (!member.is()) {
+                        SAL_WARN(
+                            "configmgr.dconf",
+                            "bad " << path << " denoting undefined template "
+                                << templ);
+                        continue;
+                    }
+                    member = member->clone(true);
+                    break;
+                default:
+                    assert(false); // cannot happen
+                }
+            } else if (!templ.isEmpty() && templ != member->getTemplateName()) {
+                SAL_WARN(
+                    "configmgr.dconf",
+                    "bad " << path
+                        << " denoting set element of non-matching template "
+                        << member->getTemplateName());
+                continue;
+            }
+        }
+        if (member.is()) {
+            if (member->getFinalized() < layer) {
+                continue;
+            }
+            switch (member->kind()) {
+            case Node::KIND_PROPERTY:
+                {
+                    if (isDir) {
+                        SAL_WARN(
+                            "configmgr.dconf",
+                            "bad dir " << path << " does not match property");
+                        continue;
+                    }
+                    rtl::Reference<PropertyNode> prop(
+                        static_cast<PropertyNode *>(member.get()));
+                    css::uno::Any value;
+                    switch (readValue(
+                                client, path, prop->getStaticType(),
+                                prop->isNillable(), prop->isExtension(),
+                                &value))
+                    {
+                    case ReadValue::Error:
+                        continue;
+                    case ReadValue::Value:
+                        prop->setValue(layer, value);
+                        finalize(client, path, member, layer);
+                        break;
+                    case ReadValue::Remove:
+                        remove = true;
+                        break;
+                    }
+                    break;
+                }
+            case Node::KIND_LOCALIZED_VALUE:
+                {
+                    if (isDir) {
+                        SAL_WARN(
+                            "configmgr.dconf",
+                            "bad dir " << path
+                                << " does not match localized value");
+                        continue;
+                    }
+                    assert(
+                        node.is()
+                        && node->kind() == Node::KIND_LOCALIZED_PROPERTY);
+                    rtl::Reference<LocalizedPropertyNode> locProp(
+                        static_cast<LocalizedPropertyNode *>(node.get()));
+                    css::uno::Any value;
+                    if (readValue(
+                            client, path, locProp->getStaticType(),
+                            locProp->isNillable(), false, &value)
+                        == ReadValue::Error)
+                    {
+                        continue;
+                    }
+                    static_cast<LocalizedValueNode *>(member.get())->setValue(
+                        layer, value);
+                    finalize(client, path, member, layer);
+                    break;
+                }
+            case Node::KIND_LOCALIZED_PROPERTY:
+            case Node::KIND_GROUP:
+            case Node::KIND_SET:
+                if (!isDir) {
+                    SAL_WARN(
+                        "configmgr.dconf",
+                        "bad key " << path
+                            << " does not match localized property, group, or"
+                            " set, respectively");
+                    continue;
+                }
+                assert(path.endsWith("/"));
+                readDir(
+                    data, layer, member, member->getMembers(), client, path);
+                break;
+            default:
+                assert(false); // cannot happen
+            }
+        }
+        if (remove) {
+            if (!(member.is() && member->getMandatory())) {
+                members.erase(name);
+            }
+        } else if (replace) {
+            members.erase(name);
+            members.insert(NodeMap::value_type(name, member));
+        } else if (insert) {
+            members.insert(NodeMap::value_type(name, member));
+        }
+    }
+}
+
+OString encodeSegment(OUString const & name, bool setElement) {
+    if (!setElement) {
+        return name.toUtf8();
+    }
+    OUStringBuffer buf;
+    for (sal_Int32 i = 0; i != name.getLength(); ++i) {
+        sal_Unicode c = name[i];
+        switch (c) {
+        case '\0':
+            buf.append("\\00");
+            break;
+        case '/':
+            buf.append("\\2F");
+            break;
+        case '\\':
+            buf.append("\\5C");
+            break;
+        default:
+            buf.append(c);
+        }
+    }
+    return buf.makeStringAndClear().toUtf8();
+}
+
+OString encodeString(OUString const & value) {
+    OUStringBuffer buf;
+    for (sal_Int32 i = 0; i != value.getLength(); ++i) {
+        sal_Unicode c = value[i];
+        switch (c) {
+        case '\0':
+            buf.append("\\00");
+            break;
+        case '\\':
+            buf.append("\\5C");
+            break;
+        default:
+            buf.append(c);
+        }
+    }
+    return buf.makeStringAndClear().toUtf8();
+}
+
+bool addProperty(
+    ChangesetHolder const & changeset, OString const & pathRepresentation,
+    Type type, bool nillable, css::uno::Any const & value)
+{
+    Type dynType = getDynamicType(value);
+    assert(dynType != TYPE_ERROR);
+    if (type == TYPE_ANY) {
+        type = dynType;
+    }
+    GVariantHolder v;
+    std::forward_list<GVariantHolder> children;
+    if (dynType == TYPE_NIL) {
+        switch (type) {
+        case TYPE_BOOLEAN:
+            v.reset(g_variant_new_maybe(G_VARIANT_TYPE_BOOLEAN, nullptr));
+            break;
+        case TYPE_SHORT:
+            v.reset(g_variant_new_maybe(G_VARIANT_TYPE_INT16, nullptr));
+            break;
+        case TYPE_INT:
+            v.reset(g_variant_new_maybe(G_VARIANT_TYPE_INT32, nullptr));
+            break;
+        case TYPE_LONG:
+            v.reset(g_variant_new_maybe(G_VARIANT_TYPE_INT64, nullptr));
+            break;
+        case TYPE_DOUBLE:
+            v.reset(g_variant_new_maybe(G_VARIANT_TYPE_DOUBLE, nullptr));
+            break;
+        case TYPE_STRING:
+            v.reset(g_variant_new_maybe(G_VARIANT_TYPE_STRING, nullptr));
+            break;
+        case TYPE_HEXBINARY:
+        case TYPE_BOOLEAN_LIST:
+        case TYPE_SHORT_LIST:
+        case TYPE_INT_LIST:
+        case TYPE_LONG_LIST:
+        case TYPE_DOUBLE_LIST:
+        case TYPE_STRING_LIST:
+        case TYPE_HEXBINARY_LIST:
+            {
+                static char const * const typeString[
+                    TYPE_HEXBINARY_LIST - TYPE_HEXBINARY + 1]
+                    = { "ay", "ab", "an", "ai", "ax", "ad", "as", "aay" };
+                GVariantTypeHolder ty(
+                    g_variant_type_new(typeString[type - TYPE_HEXBINARY]));
+                if (ty.get() == nullptr) {
+                    SAL_WARN("configmgr.dconf", "g_variant_type_new failed");
+                    return false;
+                }
+                v.reset(g_variant_new_maybe(ty.get(), nullptr));
+                break;
+            }
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+        if (v.get() == nullptr) {
+            SAL_WARN("configmgr.dconf", "g_variant_new_maybe failed");
+            return false;
+        }
+    } else {
+        switch (type) {
+        case TYPE_BOOLEAN:
+            v.reset(g_variant_new_boolean(value.get<bool>()));
+            break;
+        case TYPE_SHORT:
+            v.reset(g_variant_new_int16(value.get<sal_Int16>()));
+            break;
+        case TYPE_INT:
+            v.reset(g_variant_new_int32(value.get<sal_Int32>()));
+            break;
+        case TYPE_LONG:
+            v.reset(g_variant_new_int64(value.get<sal_Int64>()));
+            break;
+        case TYPE_DOUBLE:
+            v.reset(g_variant_new_double(value.get<double>()));
+            break;
+        case TYPE_STRING:
+            v.reset(
+                g_variant_new_string(
+                    encodeString(value.get<OUString>()).getStr()));
+            break;
+        case TYPE_HEXBINARY:
+            {
+                css::uno::Sequence<sal_Int8> seq(
+                    value.get<css::uno::Sequence<sal_Int8>>());
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                static_assert(
+                    sizeof (sal_Int8) == sizeof (guchar), "size mismatch");
+                v.reset(
+                    g_variant_new_fixed_array(
+                        G_VARIANT_TYPE_BYTE, seq.getConstArray(),
+                        seq.getLength(), sizeof (sal_Int8)));
+                break;
+            }
+        case TYPE_BOOLEAN_LIST:
+            {
+                css::uno::Sequence<sal_Bool> seq(
+                    value.get<css::uno::Sequence<sal_Bool>>());
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                static_assert(sizeof (sal_Bool) == 1, "size mismatch");
+                v.reset(
+                    g_variant_new_fixed_array(
+                        G_VARIANT_TYPE_BOOLEAN, seq.getConstArray(),
+                        seq.getLength(), sizeof (sal_Bool)));
+                break;
+            }
+        case TYPE_SHORT_LIST:
+            {
+                css::uno::Sequence<sal_Int16> seq(
+                    value.get<css::uno::Sequence<sal_Int16>>());
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                static_assert(
+                    sizeof (sal_Int16) == sizeof (gint16), "size mismatch");
+                v.reset(
+                    g_variant_new_fixed_array(
+                        G_VARIANT_TYPE_INT16, seq.getConstArray(),
+                        seq.getLength(), sizeof (sal_Int16)));
+                    //TODO: endian-ness?
+                break;
+            }
+        case TYPE_INT_LIST:
+            {
+                css::uno::Sequence<sal_Int32> seq(
+                    value.get<css::uno::Sequence<sal_Int32>>());
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                static_assert(
+                    sizeof (sal_Int32) == sizeof (gint32), "size mismatch");
+                v.reset(
+                    g_variant_new_fixed_array(
+                        G_VARIANT_TYPE_INT32, seq.getConstArray(),
+                        seq.getLength(), sizeof (sal_Int32)));
+                    //TODO: endian-ness?
+                break;
+            }
+        case TYPE_LONG_LIST:
+            {
+                css::uno::Sequence<sal_Int64> seq(
+                    value.get<css::uno::Sequence<sal_Int64>>());
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                static_assert(
+                    sizeof (sal_Int64) == sizeof (gint64), "size mismatch");
+                v.reset(
+                    g_variant_new_fixed_array(
+                        G_VARIANT_TYPE_INT64, seq.getConstArray(),
+                        seq.getLength(), sizeof (sal_Int64)));
+                    //TODO: endian-ness?
+                break;
+            }
+        case TYPE_DOUBLE_LIST:
+            {
+                css::uno::Sequence<double> seq(
+                    value.get<css::uno::Sequence<double>>());
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                static_assert(
+                    sizeof (double) == sizeof (gdouble), "size mismatch");
+                v.reset(
+                    g_variant_new_fixed_array(
+                        G_VARIANT_TYPE_DOUBLE, seq.getConstArray(),
+                        seq.getLength(), sizeof (double)));
+                    //TODO: endian-ness?
+                break;
+            }
+        case TYPE_STRING_LIST:
+            {
+                const css::uno::Sequence<OUString> seq(
+                    value.get<css::uno::Sequence<OUString>>());
+                std::vector<GVariant *> vs;
+                for (OUString const & s : seq) {
+                    children.emplace_front(
+                        g_variant_new_string(encodeString(s).getStr()));
+                    if (children.front().get() == nullptr) {
+                        SAL_WARN(
+                            "configmgr.dconf", "g_variant_new_string failed");
+                        return false;
+                    }
+                    vs.push_back(children.front().get());
+                }
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                v.reset(
+                    g_variant_new_array(
+                        G_VARIANT_TYPE_STRING, vs.data(), seq.getLength()));
+                break;
+            }
+        case TYPE_HEXBINARY_LIST:
+            {
+                const css::uno::Sequence<css::uno::Sequence<sal_Int8>> seqSeq(
+                    value.get<
+                        css::uno::Sequence<css::uno::Sequence<sal_Int8>>>());
+                std::vector<GVariant *> vs;
+                for (css::uno::Sequence<sal_Int8> const & seq : seqSeq) {
+                    static_assert(
+                        sizeof(sal_Int32) <= sizeof(gsize),
+                        "G_MAXSIZE too small");
+                    static_assert(
+                        sizeof (sal_Int8) == sizeof (guchar), "size mismatch");
+                    children.emplace_front(
+                        g_variant_new_fixed_array(
+                            G_VARIANT_TYPE_BYTE, seq.getConstArray(),
+                            seq.getLength(), sizeof (sal_Int8)));
+                    if (children.front().get() == nullptr) {
+                        SAL_WARN(
+                            "configmgr.dconf",
+                            "g_variant_new_fixed_array failed");
+                        return false;
+                    }
+                    vs.push_back(children.front().get());
+                }
+                GVariantTypeHolder ty(g_variant_type_new("aay"));
+                if (ty.get() == nullptr) {
+                    SAL_WARN("configmgr.dconf", "g_variant_type_new failed");
+                    return false;
+                }
+                static_assert(
+                    sizeof(sal_Int32) <= sizeof(gsize),
+                    "G_MAXSIZE too small");
+                v.reset(
+                    g_variant_new_array(ty.get(), vs.data(), seqSeq.getLength()));
+                break;
+            }
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+        if (v.get() == nullptr) {
+            SAL_WARN("configmgr.dconf", "GVariant creation failed");
+            return false;
+        }
+        if (nillable) {
+            GVariantHolder v1(g_variant_new_maybe(nullptr, v.get()));
+            if (v1.get() == nullptr) {
+                SAL_WARN("configmgr.dconf", "g_variant_new_maybe failed");
+                return false;
+            }
+            v.release();
+            v.reset(v1.get());
+            v1.release();
+        }
+    }
+    dconf_changeset_set(
+        changeset.get(), pathRepresentation.getStr(), v.get());
+    for (auto & i: children) {
+        i.release();
+    }
+    v.release();
+    return true;
+}
+
+bool addNode(
+    Components & components, ChangesetHolder const & changeset,
+    rtl::Reference<Node> const & parent, OString const & pathRepresentation,
+    rtl::Reference<Node> const & node)
+{
+    switch (node->kind()) {
+    case Node::KIND_PROPERTY:
+        {
+            PropertyNode * prop = static_cast<PropertyNode *>(node.get());
+            if (!addProperty(
+                    changeset, pathRepresentation, prop->getStaticType(),
+                    prop->isNillable(), prop->getValue(components)))
+            {
+                return false;
+            }
+            break;
+        }
+    case Node::KIND_LOCALIZED_VALUE:
+        {
+            //TODO: name.isEmpty()?
+            LocalizedPropertyNode * locprop
+                = static_cast<LocalizedPropertyNode *>(parent.get());
+            if (!addProperty(
+                    changeset, pathRepresentation,
+                    locprop->getStaticType(), locprop->isNillable(),
+                    static_cast<LocalizedValueNode *>(node.get())->getValue()))
+            {
+                return false;
+            }
+            break;
+        }
+    case Node::KIND_LOCALIZED_PROPERTY:
+    case Node::KIND_GROUP:
+    case Node::KIND_SET:
+        for (auto const & i: node->getMembers()) {
+            OUString templ(i.second->getTemplateName());
+            OString path(
+                pathRepresentation + "/"
+                + encodeSegment(i.first, !templ.isEmpty()));
+            if (!templ.isEmpty()) {
+                path += "/";
+                GVariantHolder v(g_variant_new_string("replace"));
+                if (v.get() == nullptr) {
+                    SAL_WARN("configmgr.dconf", "g_variant_new_string failed");
+                    return false;
+                }
+                dconf_changeset_set(
+                    changeset.get(), OString(path + "op").getStr(), v.get());
+                v.release();
+                v.reset(g_variant_new_string(encodeString(templ).getStr()));
+                if (v.get() == nullptr) {
+                    SAL_WARN("configmgr.dconf", "g_variant_new_string failed");
+                    return false;
+                }
+                dconf_changeset_set(
+                    changeset.get(), OString(path + "template").getStr(),
+                    v.get());
+                v.release();
+                path += "content";
+            }
+            if (!addNode(components, changeset, parent, path, i.second)) {
+                return false;
+            }
+        }
+        break;
+    case Node::KIND_ROOT:
+        assert(false); // this cannot happen
+        break;
+    }
+    return true;
+}
+
+bool addModifications(
+    Components & components, ChangesetHolder const & changeset,
+    OString const & parentPathRepresentation,
+    rtl::Reference<Node> const & parent, OUString const & nodeName,
+    rtl::Reference<Node> const & node,
+    Modifications::Node const & modifications)
+{
+    // It is never necessary to write oor:finalized or oor:mandatory attributes,
+    // as they cannot be set via the UNO API.
+    if (modifications.children.empty()) {
+        assert(parent.is());
+            // components themselves have no parent but must have children
+        if (node.is()) {
+            OUString templ(node->getTemplateName());
+            OString path(
+                parentPathRepresentation + "/"
+                + encodeSegment(nodeName, !templ.isEmpty()));
+            if (!templ.isEmpty()) {
+                path += "/";
+                GVariantHolder v(g_variant_new_string("replace"));
+                if (v.get() == nullptr) {
+                    SAL_WARN("configmgr.dconf", "g_variant_new_string failed");
+                    return false;
+                }
+                dconf_changeset_set(
+                    changeset.get(), OString(path + "op").getStr(), v.get());
+                v.release();
+                v.reset(g_variant_new_string(encodeString(templ).getStr()));
+                if (v.get() == nullptr) {
+                    SAL_WARN("configmgr.dconf", "g_variant_new_string failed");
+                    return false;
+                }
+                dconf_changeset_set(
+                    changeset.get(), OString(path + "template").getStr(),
+                    v.get());
+                v.release();
+                path += "content";
+            }
+            if (!addNode(components, changeset, parent, path, node)) {
+                return false;
+            }
+        } else {
+            switch (parent->kind()) {
+            case Node::KIND_LOCALIZED_PROPERTY:
+            case Node::KIND_GROUP:
+                {
+                    GVariantHolder v(g_variant_new_tuple(nullptr, 0));
+                    if (v.get() == nullptr) {
+                        SAL_WARN(
+                            "configmgr.dconf", "g_variant_new_tuple failed");
+                        return false;
+                    }
+                    OString path(parentPathRepresentation);
+                    if (!nodeName.isEmpty()) { // KIND_LOCALIZED_PROPERTY
+                        path += "/" + encodeSegment(nodeName, false);
+                    }
+                    dconf_changeset_set(
+                        changeset.get(), path.getStr(), v.get());
+                    v.release();
+                    break;
+                }
+            case Node::KIND_SET:
+                {
+                    OString path(
+                        parentPathRepresentation + "/"
+                        + encodeSegment(nodeName, true) + "/");
+                    GVariantHolder v(g_variant_new_string("remove"));
+                    if (v.get() == nullptr) {
+                        SAL_WARN(
+                            "configmgr.dconf", "g_variant_new_string failed");
+                        return false;
+                    }
+                    dconf_changeset_set(
+                        changeset.get(), OString(path + "op").getStr(),
+                        v.get());
+                    v.release();
+                    dconf_changeset_set(
+                        changeset.get(), OString(path + "template").getStr(),
+                        nullptr);
+                    dconf_changeset_set(
+                        changeset.get(), OString(path + "content/").getStr(),
+                        nullptr);
+                    break;
+                }
+            default:
+                assert(false); // this cannot happen
+                break;
+            }
+        }
+    } else {
+        assert(node.is());
+        OUString templ(node->getTemplateName());
+        OString path(
+            parentPathRepresentation + "/"
+            + encodeSegment(nodeName, !templ.isEmpty()));
+        if (!templ.isEmpty()) {
+            path += "/";
+            GVariantHolder v(g_variant_new_string("fuse"));
+            if (v.get() == nullptr) {
+                SAL_WARN("configmgr.dconf", "g_variant_new_string failed");
+                return false;
+            }
+            dconf_changeset_set(
+                changeset.get(), OString(path + "op").getStr(), v.get());
+            v.release();
+            v.reset(g_variant_new_string(encodeString(templ).getStr()));
+            if (v.get() == nullptr) {
+                SAL_WARN("configmgr.dconf", "g_variant_new_string failed");
+                return false;
+            }
+            dconf_changeset_set(
+                changeset.get(), OString(path + "template").getStr(), v.get());
+            v.release();
+            path += "content";
+        }
+        for (auto const & i: modifications.children) {
+            if (!addModifications(
+                    components, changeset, path, node, i.first,
+                    node->getMember(i.first), i.second))
+            {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+}
+
+void readLayer(Data & data, int layer) {
+    GObjectHolder<DConfClient> client(dconf_client_new());
+    if (client.get() == nullptr) {
+        SAL_WARN("configmgr.dconf", "dconf_client_new failed");
+        return;
+    }
+    readDir(
+        data, layer, rtl::Reference<Node>(), data.getComponents(), client,
+        getRoot() + "/");
+}
+
+void writeModifications(Components & components, Data & data) {
+    GObjectHolder<DConfClient> client(dconf_client_new());
+    if (client.get() == nullptr) {
+        SAL_WARN("configmgr.dconf", "dconf_client_new failed");
+    }
+    ChangesetHolder cs(dconf_changeset_new());
+    if (cs.get() == nullptr) {
+        SAL_WARN("configmgr.dconf", "dconf_changeset_new failed");
+        return;
+    }
+    for (auto const & i: data.modifications.getRoot().children) {
+        if (!addModifications(
+                components, cs, getRoot(), rtl::Reference<Node>(), i.first,
+                data.getComponents().findNode(Data::NO_LAYER, i.first),
+                i.second))
+        {
+            return;
+        }
+    }
+    if (!dconf_client_change_sync(
+            client.get(), cs.get(), nullptr, nullptr, nullptr))
+    {
+        //TODO: GError
+        SAL_WARN("configmgr.dconf", "dconf_client_change_sync failed");
+        return;
+    }
+    data.modifications.clear();
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/dconf.hxx b/configmgr/source/dconf.hxx
new file mode 100644
index 000000000..9fa51247c
--- /dev/null
+++ b/configmgr/source/dconf.hxx
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+namespace configmgr {
+    class Components;
+    struct Data;
+}
+
+namespace configmgr::dconf {
+
+void readLayer(Data & data, int layer);
+
+void writeModifications(Components & components, Data & data);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/defaultprovider.cxx b/configmgr/source/defaultprovider.cxx
new file mode 100644
index 000000000..7161659e0
--- /dev/null
+++ b/configmgr/source/defaultprovider.cxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <osl/mutex.hxx>
+#include <rtl/ustring.hxx>
+
+#include "configurationprovider.hxx"
+#include "defaultprovider.hxx"
+#include "lock.hxx"
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_configuration_DefaultProvider_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
+{
+    osl::MutexGuard guard(*configmgr::lock());
+    css::uno::Reference<css::uno::XInterface> singleton(
+        configmgr::configuration_provider::createDefault(context));
+    singleton->acquire();
+    return singleton.get();
+}
+
+namespace configmgr::default_provider
+{
+OUString getImplementationName() { return "com.sun.star.comp.configuration.DefaultProvider"; }
+
+css::uno::Sequence<OUString> getSupportedServiceNames()
+{
+    return { "com.sun.star.configuration.DefaultProvider" };
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/defaultprovider.hxx b/configmgr/source/defaultprovider.hxx
new file mode 100644
index 000000000..d20ba200b
--- /dev/null
+++ b/configmgr/source/defaultprovider.hxx
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Sequence.hxx>
+
+namespace configmgr::default_provider
+{
+OUString getImplementationName();
+
+css::uno::Sequence<OUString> getSupportedServiceNames();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/groupnode.cxx b/configmgr/source/groupnode.cxx
new file mode 100644
index 000000000..00934e917
--- /dev/null
+++ b/configmgr/source/groupnode.cxx
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+
+#include "data.hxx"
+#include "groupnode.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr {
+
+GroupNode::GroupNode(
+    int layer, bool extensible, OUString templateName):
+    Node(layer), extensible_(extensible), templateName_(std::move(templateName)),
+    mandatory_(Data::NO_LAYER)
+{}
+
+rtl::Reference< Node > GroupNode::clone(bool keepTemplateName) const {
+    return new GroupNode(*this, keepTemplateName);
+}
+
+NodeMap & GroupNode::getMembers() {
+    return members_;
+}
+
+OUString GroupNode::getTemplateName() const {
+    return templateName_;
+}
+
+void GroupNode::setMandatory(int layer) {
+    mandatory_ = layer;
+}
+
+int GroupNode::getMandatory() const {
+    return mandatory_;
+}
+
+
+GroupNode::GroupNode(GroupNode const & other, bool keepTemplateName):
+    Node(other), extensible_(other.extensible_), mandatory_(other.mandatory_)
+{
+    other.members_.cloneInto(&members_);
+    if (keepTemplateName) {
+        templateName_ = other.templateName_;
+    }
+}
+
+GroupNode::~GroupNode() {}
+
+Node::Kind GroupNode::kind() const {
+    return KIND_GROUP;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/groupnode.hxx b/configmgr/source/groupnode.hxx
new file mode 100644
index 000000000..961ecc090
--- /dev/null
+++ b/configmgr/source/groupnode.hxx
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+
+#include "node.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr
+{
+class GroupNode : public Node
+{
+public:
+    GroupNode(int layer, bool extensible, OUString templateName);
+
+    virtual rtl::Reference<Node> clone(bool keepTemplateName) const override;
+
+    virtual NodeMap& getMembers() override;
+
+    virtual OUString getTemplateName() const override;
+
+    virtual void setMandatory(int layer) override;
+
+    virtual int getMandatory() const override;
+
+    bool isExtensible() const { return extensible_; }
+
+private:
+    GroupNode(GroupNode const& other, bool keepTemplateName);
+
+    virtual ~GroupNode() override;
+
+    virtual Kind kind() const override;
+
+    bool extensible_;
+    NodeMap members_;
+    OUString templateName_; // non-empty if this node is a template, free node, or set member
+    int mandatory_;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/localizedpropertynode.cxx b/configmgr/source/localizedpropertynode.cxx
new file mode 100644
index 000000000..6e47264f2
--- /dev/null
+++ b/configmgr/source/localizedpropertynode.cxx
@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+
+#include "localizedpropertynode.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "type.hxx"
+
+namespace configmgr {
+
+LocalizedPropertyNode::LocalizedPropertyNode(
+    int layer, Type staticType, bool nillable):
+    Node(layer), staticType_(staticType), nillable_(nillable)
+{}
+
+rtl::Reference< Node > LocalizedPropertyNode::clone(bool) const {
+    return new LocalizedPropertyNode(*this);
+}
+
+NodeMap & LocalizedPropertyNode::getMembers() {
+    return members_;
+}
+
+
+LocalizedPropertyNode::LocalizedPropertyNode(
+    LocalizedPropertyNode const & other):
+    Node(other), staticType_(other.staticType_), nillable_(other.nillable_)
+{
+    other.members_.cloneInto(&members_);
+}
+
+LocalizedPropertyNode::~LocalizedPropertyNode() {}
+
+Node::Kind LocalizedPropertyNode::kind() const {
+    return KIND_LOCALIZED_PROPERTY;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/localizedpropertynode.hxx b/configmgr/source/localizedpropertynode.hxx
new file mode 100644
index 000000000..d4831a89f
--- /dev/null
+++ b/configmgr/source/localizedpropertynode.hxx
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "type.hxx"
+
+namespace configmgr
+{
+class LocalizedPropertyNode : public Node
+{
+public:
+    LocalizedPropertyNode(int layer, Type staticType, bool nillable);
+
+    virtual rtl::Reference<Node> clone(bool keepTemplateName) const override;
+
+    virtual NodeMap& getMembers() override;
+
+    Type getStaticType() const { return staticType_; }
+
+    bool isNillable() const { return nillable_; }
+
+private:
+    LocalizedPropertyNode(LocalizedPropertyNode const& other);
+
+    virtual ~LocalizedPropertyNode() override;
+
+    virtual Kind kind() const override;
+
+    Type staticType_; // as specified in the component-schema (TYPE_ANY, ..., TYPE_HEXBINARY_LIST;
+        // not TYPE_ERROR or TYPE_NIL)
+    bool nillable_;
+    NodeMap members_;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/localizedvaluenode.cxx b/configmgr/source/localizedvaluenode.cxx
new file mode 100644
index 000000000..816975063
--- /dev/null
+++ b/configmgr/source/localizedvaluenode.cxx
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+
+#include "localizedvaluenode.hxx"
+#include "node.hxx"
+
+namespace configmgr {
+
+LocalizedValueNode::LocalizedValueNode(int layer, css::uno::Any value):
+    Node(layer), value_(std::move(value))
+{}
+
+LocalizedValueNode::LocalizedValueNode(int layer):
+    Node(layer)
+{}
+
+rtl::Reference< Node > LocalizedValueNode::clone(bool) const {
+    return new LocalizedValueNode(*this);
+}
+
+OUString LocalizedValueNode::getTemplateName() const {
+    return "*";
+}
+
+
+void LocalizedValueNode::setValue(int layer, css::uno::Any const & value)
+{
+    setLayer(layer);
+    if (&value != &value_)
+        value_ = value;
+}
+
+LocalizedValueNode::~LocalizedValueNode() {}
+
+Node::Kind LocalizedValueNode::kind() const {
+    return KIND_LOCALIZED_VALUE;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/localizedvaluenode.hxx b/configmgr/source/localizedvaluenode.hxx
new file mode 100644
index 000000000..07949ac5a
--- /dev/null
+++ b/configmgr/source/localizedvaluenode.hxx
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <rtl/ref.hxx>
+
+#include "node.hxx"
+
+namespace configmgr
+{
+class LocalizedValueNode : public Node
+{
+public:
+    explicit LocalizedValueNode(int layer);
+    LocalizedValueNode(int layer, css::uno::Any value);
+
+    virtual rtl::Reference<Node> clone(bool keepTemplateName) const override;
+
+    virtual OUString getTemplateName() const override;
+
+    const css::uno::Any& getValue() const { return value_; }
+    css::uno::Any* getValuePtr(int layer)
+    {
+        setLayer(layer);
+        return &value_;
+    }
+
+    void setValue(int layer, css::uno::Any const& value);
+
+private:
+    LocalizedValueNode(LocalizedValueNode const&) = default;
+
+    virtual ~LocalizedValueNode() override;
+
+    virtual Kind kind() const override;
+
+    css::uno::Any value_;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/lock.cxx b/configmgr/source/lock.cxx
new file mode 100644
index 000000000..65b490b78
--- /dev/null
+++ b/configmgr/source/lock.cxx
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <osl/mutex.hxx>
+
+#include "lock.hxx"
+
+namespace configmgr
+{
+std::shared_ptr<osl::Mutex> const& lock()
+{
+    // fdo#31494# get ownership right
+    // Ensure that the mutex lives as long as all its consumers, otherwise
+    // the configmgr DLL exit delete this before unotools releases some configmgr derived reference.
+    static std::shared_ptr<osl::Mutex> theLock = std::make_shared<osl::Mutex>();
+    return theLock;
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/lock.hxx b/configmgr/source/lock.hxx
new file mode 100644
index 000000000..195dbf5e7
--- /dev/null
+++ b/configmgr/source/lock.hxx
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include <osl/mutex.hxx>
+#include <memory>
+
+namespace configmgr
+{
+std::shared_ptr<osl::Mutex> const& lock();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/modifications.cxx b/configmgr/source/modifications.cxx
new file mode 100644
index 000000000..d84904c3f
--- /dev/null
+++ b/configmgr/source/modifications.cxx
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <rtl/ustring.hxx>
+
+#include "modifications.hxx"
+
+namespace configmgr {
+
+Modifications::Modifications() {}
+
+Modifications::~Modifications() {}
+
+void Modifications::add(std::vector<OUString> const & path) {
+    Node * p = &root_;
+    bool wasPresent = false;
+    for (auto const& pathItem : path) {
+        Node::Children::iterator j(p->children.find(pathItem));
+        if (j == p->children.end()) {
+            if (wasPresent && p->children.empty()) {
+                return;
+            }
+            j = p->children.emplace(pathItem, Node()).first;
+            wasPresent = false;
+        } else {
+            wasPresent = true;
+        }
+        p = &j->second;
+    }
+    p->children.clear();
+}
+
+void Modifications::remove(std::vector<OUString> const & path) {
+    assert(!path.empty());
+    Node * p = &root_;
+    for (auto i(path.begin());;) {
+        Node::Children::iterator j(p->children.find(*i));
+        if (j == p->children.end()) {
+            break;
+        }
+        if (++i == path.end()) {
+            p->children.erase(j);
+            if (p->children.empty()) {
+                std::vector<OUString> parent(path);
+                parent.pop_back();
+                remove(parent);
+            }
+            break;
+        }
+        p = &j->second;
+    }
+}
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/modifications.hxx b/configmgr/source/modifications.hxx
new file mode 100644
index 000000000..22e608ac7
--- /dev/null
+++ b/configmgr/source/modifications.hxx
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <rtl/ustring.hxx>
+
+#include <boost/unordered_map.hpp>
+#include <config_dconf.h>
+
+namespace configmgr
+{
+class Modifications
+{
+public:
+    struct Node
+    {
+        typedef boost::unordered_map<OUString, Node, OUStringHash> Children;
+
+        Children children;
+    };
+
+    Modifications();
+
+    ~Modifications();
+
+    void add(std::vector<OUString> const& path);
+
+    void remove(std::vector<OUString> const& path);
+
+#if ENABLE_DCONF
+    void clear() { root_.children.clear(); }
+#endif
+
+    bool empty() const { return root_.children.empty(); }
+
+    Node const& getRoot() const { return root_; }
+
+private:
+    Modifications(const Modifications&) = delete;
+    Modifications& operator=(const Modifications&) = delete;
+
+    Node root_;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/node.cxx b/configmgr/source/node.cxx
new file mode 100644
index 000000000..8f00d3887
--- /dev/null
+++ b/configmgr/source/node.cxx
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+
+#include "data.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr {
+
+NodeMap & Node::getMembers() {
+    assert(false);
+    throw css::uno::RuntimeException("this cannot happen");
+}
+
+OUString Node::getTemplateName() const {
+    return OUString();
+}
+
+void Node::setMandatory(int layer) {
+    (void) layer; // avoid warnings
+    assert(layer == Data::NO_LAYER);
+}
+
+int Node::getMandatory() const {
+    return Data::NO_LAYER;
+}
+
+void Node::setLayer(int layer) {
+    assert(layer >= layer_);
+    layer_ = layer;
+}
+
+
+void Node::setFinalized(int layer) {
+    finalized_ = layer;
+}
+
+
+rtl::Reference< Node > Node::getMember(OUString const & name) {
+    NodeMap const & members = getMembers();
+    NodeMap::const_iterator i(members.find(name));
+    return i == members.end() ? rtl::Reference< Node >() : i->second;
+}
+
+Node::Node(int layer): layer_(layer), finalized_(Data::NO_LAYER) {}
+
+Node::Node(const Node & other):
+    SimpleReferenceObject(), layer_(other.layer_), finalized_(other.finalized_)
+{}
+
+Node::~Node() {}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/node.hxx b/configmgr/source/node.hxx
new file mode 100644
index 000000000..b858c9e42
--- /dev/null
+++ b/configmgr/source/node.hxx
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+
+namespace configmgr {
+
+class NodeMap;
+
+class Node: public salhelper::SimpleReferenceObject {
+public:
+    enum Kind {
+        KIND_PROPERTY, KIND_LOCALIZED_PROPERTY, KIND_LOCALIZED_VALUE,
+        KIND_GROUP, KIND_SET, KIND_ROOT };
+
+    virtual Kind kind() const = 0;
+
+    virtual rtl::Reference< Node > clone(bool keepTemplateName) const = 0;
+
+    virtual NodeMap & getMembers();
+    virtual OUString getTemplateName() const;
+
+    virtual void setMandatory(int layer);
+    virtual int getMandatory() const;
+
+    void setLayer(int layer);
+    int getLayer() const { return layer_;}
+
+    void setFinalized(int layer);
+    int getFinalized() const { return finalized_;}
+
+    rtl::Reference< Node > getMember(OUString const & name);
+
+protected:
+    explicit Node(int layer);
+    explicit Node(const Node & other);
+
+    virtual ~Node() override;
+private:
+    int layer_;
+    int finalized_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/nodemap.cxx b/configmgr/source/nodemap.cxx
new file mode 100644
index 000000000..e21578b28
--- /dev/null
+++ b/configmgr/source/nodemap.cxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <rtl/ustring.hxx>
+
+#include "node.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr
+{
+void NodeMap::cloneInto(NodeMap* target) const
+{
+    assert(target != nullptr && target->empty());
+    NodeMapImpl clone(maImpl);
+    for (auto& elem : clone)
+    {
+        elem.second = elem.second->clone(true);
+    }
+    std::swap(clone, target->maImpl);
+    target->clearCache();
+}
+
+rtl::Reference<Node> NodeMap::findNode(int layer, OUString const& name) const
+{
+    const_iterator i;
+    if (maCache == end() || maCache->first != name)
+        maCache = const_cast<NodeMap*>(this)->maImpl.find(name);
+    i = maCache;
+    return i == end() || i->second->getLayer() > layer ? rtl::Reference<Node>() : i->second;
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/nodemap.hxx b/configmgr/source/nodemap.hxx
new file mode 100644
index 000000000..19447c7f7
--- /dev/null
+++ b/configmgr/source/nodemap.hxx
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include "config_map.hxx"
+#include <rtl/ref.hxx>
+#include "node.hxx"
+
+namespace configmgr {
+
+typedef config_map< rtl::Reference< Node > > NodeMapImpl;
+class NodeMap
+{
+    NodeMapImpl maImpl;
+
+    NodeMap(const NodeMap &rMap) = delete;
+
+  public:
+    typedef NodeMapImpl::iterator iterator;
+    typedef NodeMapImpl::const_iterator const_iterator;
+    typedef NodeMapImpl::value_type value_type;
+
+    NodeMap() { clearCache(); }
+    bool empty() const { return maImpl.empty(); }
+    iterator find(const OUString &aStr) { return maImpl.find( aStr ); }
+
+    const_iterator find(const OUString &aStr) const { return maImpl.find( aStr ); }
+    iterator begin() { return maImpl.begin(); }
+    const_iterator begin() const { return maImpl.begin(); }
+
+    iterator end() { return maImpl.end(); }
+    const_iterator end() const { return maImpl.end(); }
+
+    rtl::Reference<Node> &operator[](const OUString &aStr) { clearCache(); return maImpl[aStr]; }
+    std::pair<iterator,bool> insert(const value_type &vt) { clearCache(); return maImpl.insert(vt); }
+    void erase(const iterator &it) { maImpl.erase(it); clearCache(); }
+    void erase(const OUString &aStr) { maImpl.erase(aStr); clearCache(); }
+
+    rtl::Reference< Node > findNode(int layer, OUString const & name) const;
+    void cloneInto(NodeMap * target) const;
+
+private:
+    // We get a large number of repeated identical lookups.
+    mutable const_iterator maCache;
+    void clearCache() { maCache = maImpl.end(); }
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/parsemanager.cxx b/configmgr/source/parsemanager.cxx
new file mode 100644
index 000000000..36dea373d
--- /dev/null
+++ b/configmgr/source/parsemanager.cxx
@@ -0,0 +1,91 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <set>
+
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "parsemanager.hxx"
+#include "parser.hxx"
+
+namespace configmgr {
+
+ParseManager::ParseManager(
+    OUString const & url, rtl::Reference< Parser > const & parser)
+   : reader_(url), parser_(parser), itemNamespaceId_(-1)
+{
+    assert(parser.is());
+    int id;
+    id = reader_.registerNamespaceIri(
+        xmlreader::Span(
+            RTL_CONSTASCII_STRINGPARAM("http://openoffice.org/2001/registry")));
+    assert(id == NAMESPACE_OOR);
+    id = reader_.registerNamespaceIri(
+        xmlreader::Span(
+            RTL_CONSTASCII_STRINGPARAM("http://www.w3.org/2001/XMLSchema")));
+    assert(id == NAMESPACE_XS);
+    id = reader_.registerNamespaceIri(
+        xmlreader::Span(
+            RTL_CONSTASCII_STRINGPARAM(
+                "http://www.w3.org/2001/XMLSchema-instance")));
+    assert(id == NAMESPACE_XSI);
+    (void)id;
+}
+
+bool ParseManager::parse(std::set< OUString > const * existingDependencies) {
+    sal_uInt32 startTime( osl_getGlobalTimer() );
+    for (;;) {
+        switch (itemData_.is()
+                ? xmlreader::XmlReader::Result::Begin
+                : reader_.nextItem(
+                    parser_->getTextMode(), &itemData_, &itemNamespaceId_))
+        {
+        case xmlreader::XmlReader::Result::Begin:
+            if (!parser_->startElement(
+                    reader_, itemNamespaceId_, itemData_, existingDependencies))
+            {
+                SAL_INFO("configmgr", "parsing " << reader_.getUrl() << " took " << (osl_getGlobalTimer() - startTime) << " ms, fail");
+                return false;
+            }
+            break;
+        case xmlreader::XmlReader::Result::End:
+            parser_->endElement(reader_);
+            break;
+        case xmlreader::XmlReader::Result::Text:
+            parser_->characters(itemData_);
+            break;
+        case xmlreader::XmlReader::Result::Done:
+            SAL_INFO("configmgr", "parsing " << reader_.getUrl() << " took " << (osl_getGlobalTimer() - startTime) << " ms, success");
+            return true;
+        }
+        itemData_.clear();
+    }
+}
+
+ParseManager::~ParseManager() {}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/parsemanager.hxx b/configmgr/source/parsemanager.hxx
new file mode 100644
index 000000000..fba61ec07
--- /dev/null
+++ b/configmgr/source/parsemanager.hxx
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+
+#include <rtl/ref.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+
+namespace configmgr {
+
+class Parser;
+
+class ParseManager: public salhelper::SimpleReferenceObject {
+public:
+    ParseManager(
+        OUString const & url, rtl::Reference< Parser > const & parser);
+
+    bool parse(std::set< OUString > const * existingDependencies);
+
+    enum { NAMESPACE_OOR = 1, NAMESPACE_XS = 2, NAMESPACE_XSI = 3 };
+
+private:
+    virtual ~ParseManager() override;
+
+    xmlreader::XmlReader reader_;
+    rtl::Reference< Parser > parser_;
+    xmlreader::Span itemData_;
+    int itemNamespaceId_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/parser.hxx b/configmgr/source/parser.hxx
new file mode 100644
index 000000000..a3984203c
--- /dev/null
+++ b/configmgr/source/parser.hxx
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+
+#include <salhelper/simplereferenceobject.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+namespace xmlreader { struct Span; }
+
+namespace configmgr {
+
+class Parser: public salhelper::SimpleReferenceObject {
+public:
+    virtual xmlreader::XmlReader::Text getTextMode() = 0;
+
+    virtual bool startElement(
+        xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+        std::set< OUString > const * existingDependencies) = 0;
+
+    virtual void endElement(xmlreader::XmlReader const & reader) = 0;
+
+    virtual void characters(xmlreader::Span const & text) = 0;
+
+protected:
+    Parser() {}
+
+    virtual ~Parser() override {}
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/partial.cxx b/configmgr/source/partial.cxx
new file mode 100644
index 000000000..f31e98549
--- /dev/null
+++ b/configmgr/source/partial.cxx
@@ -0,0 +1,134 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <set>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+
+#include "data.hxx"
+#include "partial.hxx"
+
+namespace configmgr {
+
+namespace {
+
+bool parseSegment(
+    OUString const & path, sal_Int32 * index, OUString * segment)
+{
+    assert(
+        index != nullptr && *index >= 0 && *index <= path.getLength() &&
+        segment != nullptr);
+    if (path[(*index)++] == '/') {
+        OUString name;
+        bool setElement;
+        OUString templateName;
+        *index = Data::parseSegment(
+            path, *index, &name, &setElement, &templateName);
+        if (*index != -1) {
+            *segment = Data::createSegment(templateName, name);
+            return *index == path.getLength();
+        }
+    }
+    throw css::uno::RuntimeException("bad path " + path);
+}
+
+}
+
+Partial::Partial(
+    std::set< OUString > const & includedPaths,
+    std::set< OUString > const & excludedPaths)
+{
+    // The Partial::Node tree built up here encodes the following information:
+    // * Inner node, startInclude: an include starts here that contains excluded
+    //   sub-trees
+    // * Inner node, !startInclude: contains in-/excluded sub-trees
+    // * Leaf node, startInclude: an include starts here
+    // * Leaf node, !startInclude: an exclude starts here
+    for (auto const& includedPath : includedPaths)
+    {
+        sal_Int32 n = 0;
+        for (Node * p = &root_;;) {
+            OUString seg;
+            bool end = parseSegment(includedPath, &n, &seg);
+            p = &p->children[seg];
+            if (p->startInclude) {
+                break;
+            }
+            if (end) {
+                p->children.clear();
+                p->startInclude = true;
+                break;
+            }
+        }
+    }
+    for (auto const& excludedPath : excludedPaths)
+    {
+        sal_Int32 n = 0;
+        for (Node * p = &root_;;) {
+            OUString seg;
+            bool end = parseSegment(excludedPath, &n, &seg);
+            if (end) {
+                p->children[seg].clear();
+                break;
+            }
+            Node::Children::iterator j(p->children.find(seg));
+            if (j == p->children.end()) {
+                break;
+            }
+            p = &j->second;
+        }
+    }
+}
+
+Partial::~Partial() {}
+
+Partial::Containment Partial::contains(std::vector<OUString> const & path) const {
+    //TODO: For set elements, the segment names recorded in the node tree need
+    // not match the corresponding path segments, so this function can fail.
+
+    // * If path ends at a leaf node or goes past a leaf node:
+    // ** If that leaf node is startInclude: => CONTAINS_NODE
+    // ** If that leaf node is !startInclude: => CONTAINS_NOT
+    // * If path ends at inner node:
+    // ** If there is some startInclude along its trace: => CONTAINS_NODE
+    // ** If there is no startInclude along its trace: => CONTAINS_SUBNODES
+    Node const * p = &root_;
+    bool bIncludes = false;
+    for (auto const& elemPath : path)
+    {
+        Node::Children::const_iterator j(p->children.find(elemPath));
+        if (j == p->children.end()) {
+            return p->startInclude ? CONTAINS_NODE : CONTAINS_NOT;
+        }
+        p = &j->second;
+        bIncludes |= p->startInclude;
+    }
+    return p->children.empty() && !p->startInclude
+        ? CONTAINS_NOT
+        : bIncludes ? CONTAINS_NODE : CONTAINS_SUBNODES;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/partial.hxx b/configmgr/source/partial.hxx
new file mode 100644
index 000000000..265c70124
--- /dev/null
+++ b/configmgr/source/partial.hxx
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+#include <boost/unordered_map.hpp>
+
+#include <rtl/ustring.hxx>
+
+namespace configmgr {
+
+class Partial {
+public:
+    enum Containment { CONTAINS_NOT, CONTAINS_SUBNODES, CONTAINS_NODE };
+
+    Partial(
+        std::set< OUString > const & includedPaths,
+        std::set< OUString > const & excludedPaths);
+
+    ~Partial();
+
+    Containment contains(std::vector<OUString> const & path) const;
+
+private:
+    Partial(const Partial&) = delete;
+    Partial& operator=(const Partial&) = delete;
+
+    struct Node {
+        typedef boost::unordered_map< OUString, Node, OUStringHash > Children;
+
+        Node(): startInclude(false) {}
+        void clear() { startInclude=false; children.clear(); }
+
+        Children children;
+        bool startInclude;
+    };
+
+    Node root_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/propertynode.cxx b/configmgr/source/propertynode.cxx
new file mode 100644
index 000000000..351025a2f
--- /dev/null
+++ b/configmgr/source/propertynode.cxx
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/beans/Optional.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <utility>
+
+#include "components.hxx"
+#include "node.hxx"
+#include "propertynode.hxx"
+#include "type.hxx"
+
+namespace configmgr {
+
+PropertyNode::PropertyNode(
+    int layer, Type staticType, bool nillable, css::uno::Any value,
+    bool extension):
+    Node(layer), staticType_(staticType), nillable_(nillable),
+    extension_(extension), value_(std::move(value))
+{}
+
+rtl::Reference< Node > PropertyNode::clone(bool) const {
+    return new PropertyNode(*this);
+}
+
+
+css::uno::Any const & PropertyNode::getValue(Components & components) {
+    if (!externalDescriptor_.isEmpty()) {
+        css::beans::Optional< css::uno::Any > val(
+            components.getExternalValue(externalDescriptor_));
+        if (val.IsPresent) {
+            value_ = val.Value; //TODO: check value type
+        }
+        externalDescriptor_.clear(); // must not throw
+    }
+    SAL_WARN_IF(
+        !(value_.hasValue() || nillable_), "configmgr",
+        "non-nillable property without value");
+    return value_;
+}
+
+void PropertyNode::setValue(int layer, css::uno::Any const & value) {
+    setLayer(layer);
+    value_ = value;
+    externalDescriptor_.clear();
+}
+
+css::uno::Any *PropertyNode::getValuePtr(int layer)
+{
+    setLayer(layer);
+    externalDescriptor_.clear();
+    return &value_;
+}
+
+void PropertyNode::setExternal(int layer, OUString const & descriptor) {
+    assert(!descriptor.isEmpty());
+    setLayer(layer);
+    externalDescriptor_ = descriptor;
+}
+
+PropertyNode::~PropertyNode() {}
+
+Node::Kind PropertyNode::kind() const {
+    return KIND_PROPERTY;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/propertynode.hxx b/configmgr/source/propertynode.hxx
new file mode 100644
index 000000000..108b8e944
--- /dev/null
+++ b/configmgr/source/propertynode.hxx
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <rtl/ref.hxx>
+
+#include "node.hxx"
+#include "type.hxx"
+
+
+namespace configmgr {
+
+class Components;
+
+class PropertyNode: public Node {
+public:
+    PropertyNode(
+        int layer, Type staticType, bool nillable,
+        css::uno::Any value, bool extension);
+
+    virtual rtl::Reference< Node > clone(bool keepTemplateName) const override;
+
+    Type getStaticType() const { return staticType_;}
+
+    bool isNillable() const { return nillable_;}
+
+    css::uno::Any const & getValue(Components & components);
+
+    void setValue(int layer, css::uno::Any const & value);
+    css::uno::Any *getValuePtr(int layer);
+
+    void setExternal(int layer, OUString const & descriptor);
+
+    bool isExtension() const { return extension_;}
+
+private:
+    PropertyNode(PropertyNode const&) = default;
+
+    virtual ~PropertyNode() override;
+
+    virtual Kind kind() const override;
+
+    Type staticType_;
+        // as specified in the component-schema (TYPE_ANY, ...,
+        // TYPE_HEXBINARY_LIST; not TYPE_ERROR or TYPE_NIL)
+    bool nillable_;
+    bool extension_;
+    OUString externalDescriptor_;
+    css::uno::Any value_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/readonlyaccess.cxx b/configmgr/source/readonlyaccess.cxx
new file mode 100644
index 000000000..76ec606d5
--- /dev/null
+++ b/configmgr/source/readonlyaccess.cxx
@@ -0,0 +1,121 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/NotInitializedException.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+#include <sal/types.h>
+
+#include "components.hxx"
+#include "lock.hxx"
+#include "rootaccess.hxx"
+
+namespace configmgr::read_only_access {
+
+namespace {
+
+class Service:
+    public cppu::WeakImplHelper<
+        css::lang::XServiceInfo, css::lang::XInitialization,
+        css::container::XHierarchicalNameAccess >
+{
+public:
+    explicit Service(
+        css::uno::Reference< css::uno::XComponentContext > context):
+        context_(std::move(context)) {}
+
+private:
+    Service(const Service&) = delete;
+    Service& operator=(const Service&) = delete;
+
+    virtual ~Service() override {}
+
+    virtual OUString SAL_CALL getImplementationName() override
+    { return "com.sun.star.comp.configuration.ReadOnlyAccess"; }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
+    { return cppu::supportsService(this, ServiceName); }
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override
+    { return { "com.sun.star.configuration.ReadOnlyAccess" }; }
+
+    virtual void SAL_CALL initialize(
+        css::uno::Sequence< css::uno::Any > const & aArguments) override;
+
+    virtual css::uno::Any SAL_CALL getByHierarchicalName(
+        OUString const & aName) override
+    { return getRoot()->getByHierarchicalName(aName); }
+
+    virtual sal_Bool SAL_CALL hasByHierarchicalName(OUString const & aName) override
+    { return getRoot()->hasByHierarchicalName(aName); }
+
+    rtl::Reference< RootAccess > getRoot();
+
+    css::uno::Reference< css::uno::XComponentContext > context_;
+
+    osl::Mutex mutex_;
+    rtl::Reference< RootAccess > root_;
+};
+
+void Service::initialize(css::uno::Sequence< css::uno::Any > const & aArguments)
+{
+    OUString locale;
+    if (aArguments.getLength() != 1 || !(aArguments[0] >>= locale)) {
+        throw css::lang::IllegalArgumentException(
+            "not exactly one string argument",
+            static_cast< cppu::OWeakObject * >(this), -1);
+    }
+    osl::MutexGuard g1(mutex_);
+    if (root_.is()) {
+        throw css::uno::RuntimeException(
+            "already initialized", static_cast< cppu::OWeakObject * >(this));
+    }
+    osl::MutexGuard g2(*lock());
+    Components & components = Components::getSingleton(context_);
+    root_ = new RootAccess(components, "/", locale, false);
+    components.addRootAccess(root_);
+}
+
+rtl::Reference< RootAccess > Service::getRoot() {
+    osl::MutexGuard g(mutex_);
+    if (!root_.is()) {
+        throw css::lang::NotInitializedException(
+            "not initialized", static_cast< cppu::OWeakObject * >(this));
+    }
+    return root_;
+}
+
+}
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_configuration_ReadOnlyAccess_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new configmgr::read_only_access::Service(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/readwriteaccess.cxx b/configmgr/source/readwriteaccess.cxx
new file mode 100644
index 000000000..57e8b298a
--- /dev/null
+++ b/configmgr/source/readwriteaccess.cxx
@@ -0,0 +1,144 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/configuration/XReadWriteAccess.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/lang/NotInitializedException.hpp>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+#include <sal/types.h>
+
+#include "components.hxx"
+#include "lock.hxx"
+#include "rootaccess.hxx"
+
+namespace configmgr::read_write_access {
+
+namespace {
+
+class Service:
+    public cppu::WeakImplHelper<
+        css::lang::XServiceInfo, css::lang::XInitialization,
+        css::configuration::XReadWriteAccess >
+{
+public:
+    explicit Service(
+        css::uno::Reference< css::uno::XComponentContext > context):
+        context_(std::move(context)) {}
+
+private:
+    Service(const Service&) = delete;
+    Service& operator=(const Service&) = delete;
+
+    virtual ~Service() override {}
+
+    virtual OUString SAL_CALL getImplementationName() override
+    { return "com.sun.star.comp.configuration.ReadWriteAccess"; }
+
+    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override
+    { return cppu::supportsService(this, ServiceName); }
+
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override
+    { return { "com.sun.star.configuration.ReadWriteAccess" }; }
+
+    virtual void SAL_CALL initialize(
+        css::uno::Sequence< css::uno::Any > const & aArguments) override;
+
+    virtual css::uno::Any SAL_CALL getByHierarchicalName(
+        OUString const & aName) override
+    { return getRoot()->getByHierarchicalName(aName); }
+
+    virtual sal_Bool SAL_CALL hasByHierarchicalName(OUString const & aName) override
+    { return getRoot()->hasByHierarchicalName(aName); }
+
+    virtual void SAL_CALL replaceByHierarchicalName(
+        OUString const & aName, css::uno::Any const & aElement) override
+    { getRoot()->replaceByHierarchicalName(aName, aElement); }
+
+    virtual void SAL_CALL commitChanges() override
+    { getRoot()->commitChanges(); }
+
+    virtual sal_Bool SAL_CALL hasPendingChanges() override
+    { return getRoot()->hasPendingChanges(); }
+
+    virtual css::uno::Sequence< ::css::util::ElementChange > SAL_CALL getPendingChanges() override
+    { return getRoot()->getPendingChanges(); }
+
+    css::beans::Property SAL_CALL getPropertyByHierarchicalName(
+        OUString const & aHierarchicalName)
+        override
+    { return getRoot()->getPropertyByHierarchicalName(aHierarchicalName); }
+
+    sal_Bool SAL_CALL hasPropertyByHierarchicalName(
+        OUString const & aHierarchicalName) override
+    { return getRoot()->hasPropertyByHierarchicalName(aHierarchicalName); }
+
+    rtl::Reference< RootAccess > getRoot();
+
+    css::uno::Reference< css::uno::XComponentContext > context_;
+
+    osl::Mutex mutex_;
+    rtl::Reference< RootAccess > root_;
+};
+
+void Service::initialize(css::uno::Sequence< css::uno::Any > const & aArguments)
+{
+    OUString locale;
+    if (aArguments.getLength() != 1 || !(aArguments[0] >>= locale)) {
+        throw css::lang::IllegalArgumentException(
+            "not exactly one string argument",
+            static_cast< cppu::OWeakObject * >(this), -1);
+    }
+    osl::MutexGuard g1(mutex_);
+    if (root_.is()) {
+        throw css::uno::RuntimeException(
+            "already initialized", static_cast< cppu::OWeakObject * >(this));
+    }
+    osl::MutexGuard g2(*lock());
+    Components & components = Components::getSingleton(context_);
+    root_ = new RootAccess(components, "/", locale, true);
+    components.addRootAccess(root_);
+}
+
+rtl::Reference< RootAccess > Service::getRoot() {
+    osl::MutexGuard g(mutex_);
+    if (!root_.is()) {
+        throw css::lang::NotInitializedException(
+            "not initialized", static_cast< cppu::OWeakObject * >(this));
+    }
+    return root_;
+}
+
+}
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_configuration_ReadWriteAccess_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new configmgr::read_write_access::Service(context));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/rootaccess.cxx b/configmgr/source/rootaccess.cxx
new file mode 100644
index 000000000..ff7adddef
--- /dev/null
+++ b/configmgr/source/rootaccess.cxx
@@ -0,0 +1,313 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <utility>
+#include <vector>
+
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Type.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/util/ChangesEvent.hpp>
+#include <com/sun/star/util/ChangesSet.hpp>
+#include <com/sun/star/util/ElementChange.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/util/XChangesListener.hpp>
+#include <com/sun/star/util/XChangesNotifier.hpp>
+#include <comphelper/sequence.hxx>
+#include <cppu/unotype.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+
+#include "broadcaster.hxx"
+#include "components.hxx"
+#include "data.hxx"
+#include "lock.hxx"
+#include "modifications.hxx"
+#include "node.hxx"
+#include "rootaccess.hxx"
+
+namespace configmgr {
+
+RootAccess::RootAccess(
+    Components & components, OUString pathRepresentation,
+    OUString locale, bool update):
+    Access(components), pathRepresentation_(std::move(pathRepresentation)),
+    locale_(std::move(locale)),
+    lock_( lock() ),
+    update_(update), finalized_(false), alive_(true)
+{
+}
+
+std::vector<OUString> RootAccess::getAbsolutePath() {
+    getNode();
+    return path_;
+}
+
+void RootAccess::initBroadcaster(
+    Modifications::Node const & modifications, Broadcaster * broadcaster)
+{
+    assert(broadcaster != nullptr);
+    std::vector< css::util::ElementChange > changes;
+    initBroadcasterAndChanges(
+        modifications, broadcaster, changesListeners_.empty() ? nullptr : &changes);
+    if (changes.empty())
+        return;
+
+    css::util::ChangesSet set(comphelper::containerToSequence(changes));
+    for (auto const& changesListener : changesListeners_)
+    {
+        cppu::OWeakObject* pSource = this;
+        css::uno::Reference< css::uno::XInterface > xBase( pSource, css::uno::UNO_QUERY );
+        broadcaster->addChangesNotification(
+            changesListener,
+            css::util::ChangesEvent(
+                pSource, css::uno::Any( xBase ), set));
+    }
+}
+
+void RootAccess::acquire() noexcept {
+    Access::acquire();
+}
+
+void RootAccess::release() noexcept {
+    Access::release();
+}
+
+OUString const & RootAccess::getAbsolutePathRepresentation() {
+    getNode(); // turn pathRepresentation_ into canonic form
+    return pathRepresentation_;
+}
+
+
+void RootAccess::setAlive(bool b) {
+    alive_ = b;
+}
+
+void RootAccess::addChangesListener(
+    css::uno::Reference< css::util::XChangesListener > const & aListener)
+{
+    assert(thisIs(IS_ANY));
+    {
+        osl::MutexGuard g(*lock_);
+        checkLocalizedPropertyAccess();
+        if (!aListener.is()) {
+            throw css::uno::RuntimeException(
+                "null listener", static_cast< cppu::OWeakObject * >(this));
+        }
+        if (!isDisposed()) {
+            changesListeners_.insert(aListener);
+            return;
+        }
+    }
+    try {
+        aListener->disposing(
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    } catch (css::lang::DisposedException &) {}
+}
+
+void RootAccess::removeChangesListener(
+    css::uno::Reference< css::util::XChangesListener > const & aListener)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    ChangesListeners::iterator i(changesListeners_.find(aListener));
+    if (i != changesListeners_.end()) {
+        changesListeners_.erase(i);
+    }
+}
+
+void RootAccess::commitChanges()
+{
+    assert(thisIs(IS_UPDATE));
+    if (!alive_)
+    {
+        return;
+    }
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+
+        checkLocalizedPropertyAccess();
+        int finalizedLayer;
+        Modifications globalMods;
+        commitChildChanges(
+            ((getComponents().resolvePathRepresentation(
+                  pathRepresentation_, nullptr, nullptr, &finalizedLayer)
+              == node_) &&
+             finalizedLayer == Data::NO_LAYER),
+            &globalMods);
+        getComponents().writeModifications();
+        getComponents().initGlobalBroadcaster(globalMods, this, &bc);
+    }
+    bc.send();
+}
+
+sal_Bool RootAccess::hasPendingChanges() {
+    assert(thisIs(IS_UPDATE));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    //TODO: Optimize:
+    std::vector< css::util::ElementChange > changes;
+    reportChildChanges(&changes);
+    return !changes.empty();
+}
+
+css::uno::Sequence< ::css::util::ElementChange > RootAccess::getPendingChanges()
+{
+    assert(thisIs(IS_UPDATE));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    std::vector< css::util::ElementChange > changes;
+    reportChildChanges(&changes);
+    return comphelper::containerToSequence(changes);
+}
+
+RootAccess::~RootAccess()
+{
+    osl::MutexGuard g(*lock_);
+    if (alive_)
+        getComponents().removeRootAccess(this);
+}
+
+std::vector<OUString> RootAccess::getRelativePath() {
+    return std::vector<OUString>();
+}
+
+OUString RootAccess::getRelativePathRepresentation() {
+    return OUString();
+}
+
+rtl::Reference< Node > RootAccess::getNode() {
+    if (!node_.is()) {
+        OUString canonic;
+        int finalizedLayer;
+        node_ = getComponents().resolvePathRepresentation(
+            pathRepresentation_, &canonic, &path_, &finalizedLayer);
+        if (!node_.is()) {
+            throw css::uno::RuntimeException(
+                "cannot find " + pathRepresentation_, nullptr);
+                // RootAccess::queryInterface indirectly calls
+                // RootAccess::getNode, so if this RootAccess were passed out in
+                // RuntimeException.Context, client code that called
+                // queryInterface on it would cause trouble; therefore,
+                // RuntimeException.Context is left null here
+        }
+        pathRepresentation_ = canonic;
+        assert(!path_.empty() || node_->kind() == Node::KIND_ROOT);
+        if (!path_.empty()) {
+            name_ = path_.back();
+        }
+        finalized_ = finalizedLayer != Data::NO_LAYER;
+    }
+    return node_;
+}
+
+bool RootAccess::isFinalized() {
+    getNode();
+    return finalized_;
+}
+
+const OUString & RootAccess::getNameInternal() {
+    getNode();
+    return name_;
+}
+
+rtl::Reference< RootAccess > RootAccess::getRootAccess() {
+    return this;
+}
+
+rtl::Reference< Access > RootAccess::getParentAccess() {
+    return rtl::Reference< Access >();
+}
+
+void RootAccess::addTypes(std::vector< css::uno::Type > * types) const {
+    assert(types != nullptr);
+    types->push_back(cppu::UnoType< css::util::XChangesNotifier >::get());
+    types->push_back(cppu::UnoType< css::util::XChangesBatch >::get());
+}
+
+void RootAccess::addSupportedServiceNames(
+    std::vector<OUString> * services)
+{
+    assert(services != nullptr);
+    services->push_back("com.sun.star.configuration.AccessRootElement");
+    if (update_) {
+        services->push_back("com.sun.star.configuration.UpdateRootElement");
+    }
+}
+
+void RootAccess::initDisposeBroadcaster(Broadcaster * broadcaster) {
+    assert(broadcaster != nullptr);
+    for (auto const& changesListener : changesListeners_)
+    {
+        broadcaster->addDisposeNotification(
+            changesListener,
+            css::lang::EventObject(static_cast< cppu::OWeakObject * >(this)));
+    }
+    Access::initDisposeBroadcaster(broadcaster);
+}
+
+void RootAccess::clearListeners() noexcept {
+    changesListeners_.clear();
+    Access::clearListeners();
+}
+
+css::uno::Any RootAccess::queryInterface(css::uno::Type const & aType)
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    css::uno::Any res(Access::queryInterface(aType));
+    if (res.hasValue()) {
+        return res;
+    }
+    res = cppu::queryInterface(
+        aType, static_cast< css::util::XChangesNotifier * >(this));
+    if (res.hasValue()) {
+        return res;
+    }
+    if (!res.hasValue() && update_) {
+        res = cppu::queryInterface(
+            aType, static_cast< css::util::XChangesBatch * >(this));
+    }
+    return res;
+}
+
+OUString RootAccess::getImplementationName()
+{
+    assert(thisIs(IS_ANY));
+    osl::MutexGuard g(*lock_);
+    checkLocalizedPropertyAccess();
+    return "configmgr.RootAccess";
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/rootaccess.hxx b/configmgr/source/rootaccess.hxx
new file mode 100644
index 000000000..4eb90d36c
--- /dev/null
+++ b/configmgr/source/rootaccess.hxx
@@ -0,0 +1,144 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+#include <vector>
+
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/util/XChangesNotifier.hpp>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+
+#include "access.hxx"
+#include "modifications.hxx"
+
+namespace com::sun::star {
+    namespace uno {
+        class Any;
+        class Type;
+    }
+    namespace util { class XChangesListener; }
+}
+
+namespace configmgr {
+
+class Broadcaster;
+class Components;
+class Node;
+
+class RootAccess:
+    public Access, public css::util::XChangesNotifier,
+    public css::util::XChangesBatch
+{
+public:
+    RootAccess(
+        Components & components, OUString pathRepresentation,
+        OUString locale, bool update);
+
+    virtual std::vector<OUString> getAbsolutePath() override;
+
+    virtual void initBroadcaster(
+        Modifications::Node const & modifications, Broadcaster * broadcaster) override;
+
+    virtual void SAL_CALL acquire() noexcept override;
+
+    virtual void SAL_CALL release() noexcept override;
+
+    OUString const & getAbsolutePathRepresentation();
+
+    const OUString& getLocale() const { return locale_;}
+
+    bool isUpdate() const { return update_;}
+
+    void setAlive(bool b);
+
+    virtual void SAL_CALL addChangesListener(
+        css::uno::Reference< css::util::XChangesListener >
+            const & aListener) override;
+
+    virtual void SAL_CALL removeChangesListener(
+        css::uno::Reference< css::util::XChangesListener >
+            const & aListener) override;
+
+    virtual void SAL_CALL commitChanges() override;
+
+    virtual sal_Bool SAL_CALL hasPendingChanges() override;
+
+    virtual css::uno::Sequence< ::css::util::ElementChange > SAL_CALL getPendingChanges() override;
+
+private:
+    virtual ~RootAccess() override;
+
+    virtual std::vector<OUString> getRelativePath() override;
+
+    virtual OUString getRelativePathRepresentation() override;
+
+    virtual rtl::Reference< Node > getNode() override;
+
+    virtual bool isFinalized() override;
+
+    virtual const OUString & getNameInternal() override;
+
+    virtual rtl::Reference< RootAccess > getRootAccess() override;
+
+    virtual rtl::Reference< Access > getParentAccess() override;
+
+    virtual void addTypes(std::vector< css::uno::Type > * types)
+        const override;
+
+    virtual void addSupportedServiceNames(
+        std::vector<OUString> * services) override;
+
+    virtual void initDisposeBroadcaster(Broadcaster * broadcaster) override;
+
+    virtual void clearListeners() noexcept override;
+
+    virtual css::uno::Any SAL_CALL queryInterface(
+        css::uno::Type const & aType) override;
+
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    typedef
+        std::multiset<
+            css::uno::Reference<
+                css::util::XChangesListener > >
+        ChangesListeners;
+
+    OUString pathRepresentation_;
+    OUString locale_;
+    std::vector<OUString> path_;
+    rtl::Reference< Node > node_;
+    OUString name_;
+    ChangesListeners changesListeners_;
+
+    std::shared_ptr<osl::Mutex> lock_;
+
+    bool update_:1;
+    bool finalized_:1;
+    bool alive_:1;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/rootnode.cxx b/configmgr/source/rootnode.cxx
new file mode 100644
index 000000000..ce70d688c
--- /dev/null
+++ b/configmgr/source/rootnode.cxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+
+#include "data.hxx"
+#include "node.hxx"
+#include "rootnode.hxx"
+
+namespace configmgr {
+
+RootNode::RootNode(): Node(Data::NO_LAYER) {}
+
+RootNode::~RootNode() {}
+
+Node::Kind RootNode::kind() const {
+    return KIND_ROOT;
+}
+
+rtl::Reference< Node > RootNode::clone(bool) const {
+    assert(false); // this cannot happen
+    return rtl::Reference< Node >();
+}
+
+NodeMap & RootNode::getMembers() {
+    return members_;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/rootnode.hxx b/configmgr/source/rootnode.hxx
new file mode 100644
index 000000000..84e10ef26
--- /dev/null
+++ b/configmgr/source/rootnode.hxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ref.hxx>
+
+#include "node.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr
+{
+class RootNode : public Node
+{
+public:
+    RootNode();
+
+private:
+    virtual ~RootNode() override;
+
+    virtual Kind kind() const override;
+
+    virtual rtl::Reference<Node> clone(bool keepTemplateName) const override;
+
+    virtual NodeMap& getMembers() override;
+
+    NodeMap members_;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/setnode.cxx b/configmgr/source/setnode.cxx
new file mode 100644
index 000000000..5e15ac31d
--- /dev/null
+++ b/configmgr/source/setnode.cxx
@@ -0,0 +1,90 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <algorithm>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+
+#include "data.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "setnode.hxx"
+
+namespace configmgr {
+
+SetNode::SetNode(
+    int layer, OUString defaultTemplateName,
+    OUString templateName):
+    Node(layer), defaultTemplateName_(std::move(defaultTemplateName)),
+    templateName_(std::move(templateName)), mandatory_(Data::NO_LAYER)
+{}
+
+rtl::Reference< Node > SetNode::clone(bool keepTemplateName) const {
+    return new SetNode(*this, keepTemplateName);
+}
+
+NodeMap & SetNode::getMembers() {
+    return members_;
+}
+
+OUString SetNode::getTemplateName() const {
+    return templateName_;
+}
+
+void SetNode::setMandatory(int layer) {
+    mandatory_ = layer;
+}
+
+int SetNode::getMandatory() const {
+    return mandatory_;
+}
+
+
+bool SetNode::isValidTemplate(OUString const & templateName) const {
+    return Data::equalTemplateNames(templateName, defaultTemplateName_) ||
+        std::any_of(
+            additionalTemplateNames_.begin(),
+            additionalTemplateNames_.end(),
+            [&templateName](OUString const & longName) { return Data::equalTemplateNames(templateName, longName); } );
+}
+
+SetNode::SetNode(SetNode const & other, bool keepTemplateName):
+    Node(other), defaultTemplateName_(other.defaultTemplateName_),
+    additionalTemplateNames_(other.additionalTemplateNames_),
+    mandatory_(other.mandatory_)
+{
+    other.members_.cloneInto(&members_);
+    if (keepTemplateName) {
+        templateName_ = other.templateName_;
+    }
+}
+
+SetNode::~SetNode() {}
+
+Node::Kind SetNode::kind() const {
+    return KIND_SET;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/setnode.hxx b/configmgr/source/setnode.hxx
new file mode 100644
index 000000000..706d153da
--- /dev/null
+++ b/configmgr/source/setnode.hxx
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+
+#include "node.hxx"
+#include "nodemap.hxx"
+
+namespace configmgr {
+
+class SetNode: public Node {
+public:
+    SetNode(
+        int layer, OUString defaultTemplateName,
+        OUString templateName);
+
+    virtual rtl::Reference< Node > clone(bool keepTemplateName) const override;
+
+    virtual NodeMap & getMembers() override;
+
+    virtual OUString getTemplateName() const override;
+
+    virtual void setMandatory(int layer) override;
+
+    virtual int getMandatory() const override;
+
+    OUString const & getDefaultTemplateName() const { return defaultTemplateName_;}
+
+    std::vector<OUString> & getAdditionalTemplateNames() { return additionalTemplateNames_;}
+
+    bool isValidTemplate(OUString const & templateName) const;
+
+private:
+    SetNode(SetNode const & other, bool keepTemplateName);
+
+    virtual ~SetNode() override;
+
+    virtual Kind kind() const override;
+
+    OUString defaultTemplateName_;
+    std::vector<OUString> additionalTemplateNames_;
+    NodeMap members_;
+    OUString templateName_;
+        // non-empty if this node is a template, free node, or set member
+    int mandatory_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/type.cxx b/configmgr/source/type.cxx
new file mode 100644
index 000000000..b8fab28ac
--- /dev/null
+++ b/configmgr/source/type.cxx
@@ -0,0 +1,162 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Type.hxx>
+#include <com/sun/star/uno/TypeClass.hpp>
+#include <cppu/unotype.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+
+#include "type.hxx"
+
+namespace configmgr {
+
+bool isListType(Type type) {
+    return type >= TYPE_BOOLEAN_LIST;
+}
+
+Type elementType(Type type) {
+    switch (type) {
+    case TYPE_BOOLEAN_LIST:
+        return TYPE_BOOLEAN;
+    case TYPE_SHORT_LIST:
+        return TYPE_SHORT;
+    case TYPE_INT_LIST:
+        return TYPE_INT;
+    case TYPE_LONG_LIST:
+        return TYPE_LONG;
+    case TYPE_DOUBLE_LIST:
+        return TYPE_DOUBLE;
+    case TYPE_STRING_LIST:
+        return TYPE_STRING;
+    case TYPE_HEXBINARY_LIST:
+        return TYPE_HEXBINARY;
+    default:
+        assert(false);
+        throw css::uno::RuntimeException("this cannot happen");
+    }
+}
+
+css::uno::Type const & mapType(Type type) {
+    switch (type) {
+    case TYPE_ANY:
+        return cppu::UnoType< css::uno::Any >::get();
+    case TYPE_BOOLEAN:
+        return cppu::UnoType< sal_Bool >::get();
+    case TYPE_SHORT:
+        return cppu::UnoType< sal_Int16 >::get();
+    case TYPE_INT:
+        return cppu::UnoType< sal_Int32 >::get();
+    case TYPE_LONG:
+        return cppu::UnoType< sal_Int64 >::get();
+    case TYPE_DOUBLE:
+        return cppu::UnoType< double >::get();
+    case TYPE_STRING:
+        return cppu::UnoType< OUString >::get();
+    case TYPE_HEXBINARY:
+        return cppu::UnoType< css::uno::Sequence< sal_Int8 > >::get();
+    case TYPE_BOOLEAN_LIST:
+        return cppu::UnoType< css::uno::Sequence< sal_Bool > >::get();
+    case TYPE_SHORT_LIST:
+        return cppu::UnoType< css::uno::Sequence< sal_Int16 > >::get();
+    case TYPE_INT_LIST:
+        return cppu::UnoType< css::uno::Sequence< sal_Int32 > >::get();
+    case TYPE_LONG_LIST:
+        return cppu::UnoType< css::uno::Sequence< sal_Int64 > >::get();
+    case TYPE_DOUBLE_LIST:
+        return cppu::UnoType< css::uno::Sequence< double > >::get();
+    case TYPE_STRING_LIST:
+        return cppu::UnoType< css::uno::Sequence< OUString > >::get();
+    case TYPE_HEXBINARY_LIST:
+        return cppu::UnoType<
+            css::uno::Sequence< css::uno::Sequence< sal_Int8 > > >::get();
+    default:
+        assert(false);
+        throw css::uno::RuntimeException("this cannot happen");
+    }
+}
+
+Type getDynamicType(css::uno::Any const & value) {
+    switch (value.getValueType().getTypeClass()) {
+    case css::uno::TypeClass_VOID:
+        return TYPE_NIL;
+    case css::uno::TypeClass_BOOLEAN:
+        return TYPE_BOOLEAN;
+    case css::uno::TypeClass_BYTE:
+        return TYPE_SHORT;
+    case css::uno::TypeClass_SHORT:
+        return TYPE_SHORT;
+    case css::uno::TypeClass_UNSIGNED_SHORT:
+        return value.has< sal_Int16 >() ? TYPE_SHORT : TYPE_INT;
+    case css::uno::TypeClass_LONG:
+        return TYPE_INT;
+    case css::uno::TypeClass_UNSIGNED_LONG:
+        return value.has< sal_Int32 >() ? TYPE_INT : TYPE_LONG;
+    case css::uno::TypeClass_HYPER:
+        return TYPE_LONG;
+    case css::uno::TypeClass_UNSIGNED_HYPER:
+        return value.has< sal_Int64 >() ? TYPE_LONG : TYPE_ERROR;
+    case css::uno::TypeClass_FLOAT:
+    case css::uno::TypeClass_DOUBLE:
+        return TYPE_DOUBLE;
+    case css::uno::TypeClass_STRING:
+        return TYPE_STRING;
+    case css::uno::TypeClass_SEQUENCE: //TODO
+        {
+            OUString name(value.getValueType().getTypeName());
+            if ( name == "[]byte" ) {
+                return TYPE_HEXBINARY;
+            } else if (name == "[]boolean")
+            {
+                return TYPE_BOOLEAN_LIST;
+            } else if ( name == "[]short" )
+            {
+                return TYPE_SHORT_LIST;
+            } else if ( name == "[]long" )
+            {
+                return TYPE_INT_LIST;
+            } else if ( name == "[]hyper" )
+            {
+                return TYPE_LONG_LIST;
+            } else if (name == "[]double")
+            {
+                return TYPE_DOUBLE_LIST;
+            } else if (name == "[]string")
+            {
+                return TYPE_STRING_LIST;
+            } else if (name == "[][]byte")
+            {
+                return TYPE_HEXBINARY_LIST;
+            }
+        }
+        [[fallthrough]];
+    default:
+        return TYPE_ERROR;
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/type.hxx b/configmgr/source/type.hxx
new file mode 100644
index 000000000..7fd096ac1
--- /dev/null
+++ b/configmgr/source/type.hxx
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include <sal/types.h>
+
+namespace com::sun::star::uno {
+    class Any;
+    class Type;
+}
+
+namespace configmgr {
+
+enum Type {
+    TYPE_ERROR, TYPE_NIL, TYPE_ANY, TYPE_BOOLEAN, TYPE_SHORT, TYPE_INT,
+    TYPE_LONG, TYPE_DOUBLE, TYPE_STRING, TYPE_HEXBINARY, TYPE_BOOLEAN_LIST,
+    TYPE_SHORT_LIST, TYPE_INT_LIST, TYPE_LONG_LIST, TYPE_DOUBLE_LIST,
+    TYPE_STRING_LIST, TYPE_HEXBINARY_LIST };
+
+bool isListType(Type type);
+
+Type elementType(Type type);
+
+css::uno::Type const & mapType(Type type);
+
+Type getDynamicType(css::uno::Any const & value);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/update.cxx b/configmgr/source/update.cxx
new file mode 100644
index 000000000..1cc2a06fe
--- /dev/null
+++ b/configmgr/source/update.cxx
@@ -0,0 +1,150 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <set>
+
+#include <com/sun/star/configuration/XUpdate.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/weak.hxx>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+
+#include "broadcaster.hxx"
+#include "components.hxx"
+#include "lock.hxx"
+#include "modifications.hxx"
+#include "rootaccess.hxx"
+
+namespace configmgr::update {
+
+namespace {
+
+std::set< OUString > seqToSet(
+    css::uno::Sequence< OUString > const & sequence)
+{
+    return std::set< OUString >( sequence.begin(), sequence.end() );
+}
+
+class Service:
+    public cppu::WeakImplHelper< css::configuration::XUpdate >
+{
+public:
+    explicit Service(const css::uno::Reference< css::uno::XComponentContext >& context):
+        context_(context)
+    {
+        assert(context.is());
+        lock_ = lock();
+    }
+
+private:
+    Service(const Service&) = delete;
+    Service& operator=(const Service&) = delete;
+
+    virtual ~Service() override {}
+
+    virtual void SAL_CALL insertExtensionXcsFile(
+        sal_Bool shared, OUString const & fileUri) override;
+
+    virtual void SAL_CALL insertExtensionXcuFile(
+        sal_Bool shared, OUString const & fileUri) override;
+
+    virtual void SAL_CALL removeExtensionXcuFile(OUString const & fileUri) override;
+
+    virtual void SAL_CALL insertModificationXcuFile(
+        OUString const & fileUri,
+        css::uno::Sequence< OUString > const & includedPaths,
+        css::uno::Sequence< OUString > const & excludedPaths) override;
+
+    std::shared_ptr<osl::Mutex> lock_;
+    css::uno::Reference< css::uno::XComponentContext > context_;
+};
+
+void Service::insertExtensionXcsFile(
+    sal_Bool shared, OUString const & fileUri)
+{
+    osl::MutexGuard g(*lock_);
+    Components::getSingleton(context_).insertExtensionXcsFile(shared, fileUri);
+}
+
+void Service::insertExtensionXcuFile(
+    sal_Bool shared, OUString const & fileUri)
+{
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        Components & components = Components::getSingleton(context_);
+        Modifications mods;
+        components.insertExtensionXcuFile(shared, fileUri, &mods);
+        components.initGlobalBroadcaster(
+            mods, rtl::Reference< RootAccess >(), &bc);
+    }
+    bc.send();
+}
+
+void Service::removeExtensionXcuFile(OUString const & fileUri)
+{
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        Components & components = Components::getSingleton(context_);
+        Modifications mods;
+        components.removeExtensionXcuFile(fileUri, &mods);
+        components.initGlobalBroadcaster(
+            mods, rtl::Reference< RootAccess >(), &bc);
+    }
+    bc.send();
+}
+
+void Service::insertModificationXcuFile(
+    OUString const & fileUri,
+    css::uno::Sequence< OUString > const & includedPaths,
+    css::uno::Sequence< OUString > const & excludedPaths)
+{
+    Broadcaster bc;
+    {
+        osl::MutexGuard g(*lock_);
+        Components & components = Components::getSingleton(context_);
+        Modifications mods;
+        components.insertModificationXcuFile(
+            fileUri, seqToSet(includedPaths), seqToSet(excludedPaths), &mods);
+        components.initGlobalBroadcaster(
+            mods, rtl::Reference< RootAccess >(), &bc);
+    }
+    bc.send();
+}
+
+}
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+com_sun_star_comp_configuration_Update_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )
+{
+    return cppu::acquire(new configmgr::update::Service(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/valueparser.cxx b/configmgr/source/valueparser.cxx
new file mode 100644
index 000000000..82778e6c8
--- /dev/null
+++ b/configmgr/source/valueparser.cxx
@@ -0,0 +1,454 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <comphelper/sequence.hxx>
+#include <rtl/math.h>
+#include <rtl/string.h>
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "localizedvaluenode.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "parsemanager.hxx"
+#include "propertynode.hxx"
+#include "type.hxx"
+#include "valueparser.hxx"
+
+namespace configmgr {
+
+namespace {
+
+bool parseHexDigit(char c, int * value) {
+    assert(value != nullptr);
+    if (c >= '0' && c <= '9') {
+        *value = c - '0';
+        return true;
+    }
+    if (c >= 'A' && c <= 'F') {
+        *value = c - 'A' + 10;
+        return true;
+    }
+    if (c >= 'a' && c <= 'f') {
+        *value = c - 'a' + 10;
+        return true;
+    }
+    return false;
+}
+
+bool parseValue(xmlreader::Span const & text, sal_Bool * value) {
+    assert(text.is() && value != nullptr);
+    if (text == "true" || text == "1") {
+        *value = true;
+        return true;
+    }
+    if (text == "false" || text == "0") {
+        *value = false;
+        return true;
+    }
+    return false;
+}
+
+bool parseValue(xmlreader::Span const & text, sal_Int16 * value) {
+    assert(text.is() && value != nullptr);
+    // For backwards compatibility, support hexadecimal values:
+    sal_Int32 n =
+        rtl_str_shortenedCompareIgnoreAsciiCase_WithLength(
+            text.begin, text.length, RTL_CONSTASCII_STRINGPARAM("0X"),
+            RTL_CONSTASCII_LENGTH("0X")) == 0 ?
+        static_cast< sal_Int32 >(
+            OString(
+                text.begin + RTL_CONSTASCII_LENGTH("0X"),
+                text.length - RTL_CONSTASCII_LENGTH("0X")).toUInt32(16)) :
+        OString(text.begin, text.length).toInt32();
+        //TODO: check valid lexical representation
+    if (n >= SAL_MIN_INT16 && n <= SAL_MAX_INT16) {
+        *value = static_cast< sal_Int16 >(n);
+        return true;
+    }
+    return false;
+}
+
+bool parseValue(xmlreader::Span const & text, sal_Int32 * value) {
+    assert(text.is() && value != nullptr);
+    // For backwards compatibility, support hexadecimal values:
+    *value =
+        rtl_str_shortenedCompareIgnoreAsciiCase_WithLength(
+            text.begin, text.length, RTL_CONSTASCII_STRINGPARAM("0X"),
+            RTL_CONSTASCII_LENGTH("0X")) == 0 ?
+        static_cast< sal_Int32 >(
+            OString(
+                text.begin + RTL_CONSTASCII_LENGTH("0X"),
+                text.length - RTL_CONSTASCII_LENGTH("0X")).toUInt32(16)) :
+        OString(text.begin, text.length).toInt32();
+        //TODO: check valid lexical representation
+    return true;
+}
+
+bool parseValue(xmlreader::Span const & text, sal_Int64 * value) {
+    assert(text.is() && value != nullptr);
+    // For backwards compatibility, support hexadecimal values:
+    *value =
+        rtl_str_shortenedCompareIgnoreAsciiCase_WithLength(
+            text.begin, text.length, RTL_CONSTASCII_STRINGPARAM("0X"),
+            RTL_CONSTASCII_LENGTH("0X")) == 0 ?
+        static_cast< sal_Int64 >(
+            OString(
+                text.begin + RTL_CONSTASCII_LENGTH("0X"),
+                text.length - RTL_CONSTASCII_LENGTH("0X")).toUInt64(16)) :
+        OString(text.begin, text.length).toInt64();
+        //TODO: check valid lexical representation
+    return true;
+}
+
+bool parseValue(xmlreader::Span const & text, double * value) {
+    assert(text.is() && value != nullptr);
+    *value = rtl_math_stringToDouble(
+        text.begin, text.begin + text.length, '.', 0, nullptr, nullptr);
+        //TODO: check valid lexical representation
+    return true;
+}
+
+bool parseValue(xmlreader::Span const & text, OUString * value) {
+    assert(text.is() && value != nullptr);
+    *value = text.convertFromUtf8();
+    return true;
+}
+
+bool parseValue(
+    xmlreader::Span const & text, css::uno::Sequence< sal_Int8 > * value)
+{
+    assert(text.is() && value != nullptr);
+    if ((text.length & 1) != 0) {
+        return false;
+    }
+    std::vector< sal_Int8 > seq;
+    for (sal_Int32 i = 0; i != text.length;) {
+        int n1;
+        int n2;
+        if (!parseHexDigit(text.begin[i++], &n1) ||
+            !parseHexDigit(text.begin[i++], &n2))
+        {
+            return false;
+        }
+        seq.push_back(static_cast< sal_Int8 >((n1 << 4) | n2));
+    }
+    *value = comphelper::containerToSequence(seq);
+    return true;
+}
+
+template< typename T > css::uno::Any parseSingleValue(
+    xmlreader::Span const & text)
+{
+    T val;
+    if (!parseValue(text, &val)) {
+        throw css::uno::RuntimeException("invalid value");
+    }
+    return css::uno::Any(val);
+}
+
+template< typename T > css::uno::Any parseListValue(
+    OString const & separator, xmlreader::Span const & text)
+{
+    std::vector< T > seq;
+    xmlreader::Span sep;
+    if (separator.isEmpty()) {
+        sep = xmlreader::Span(RTL_CONSTASCII_STRINGPARAM(" "));
+    } else {
+        sep = xmlreader::Span(separator.getStr(), separator.getLength());
+    }
+    if (text.length != 0) {
+        for (xmlreader::Span t(text);;) {
+            sal_Int32 i = rtl_str_indexOfStr_WithLength(
+                t.begin, t.length, sep.begin, sep.length);
+            T val;
+            if (!parseValue(
+                    xmlreader::Span(t.begin, i == -1 ? t.length : i), &val))
+            {
+                throw css::uno::RuntimeException("invalid value");
+            }
+            seq.push_back(val);
+            if (i < 0) {
+                break;
+            }
+            t.begin += i + sep.length;
+            t.length -= i + sep.length;
+        }
+    }
+    return css::uno::Any(comphelper::containerToSequence(seq));
+}
+
+css::uno::Any parseValue(
+    OString const & separator, xmlreader::Span const & text, Type type)
+{
+    switch (type) {
+    case TYPE_ANY:
+        throw css::uno::RuntimeException("invalid value of type any");
+    case TYPE_BOOLEAN:
+        return parseSingleValue< sal_Bool >(text);
+    case TYPE_SHORT:
+        return parseSingleValue< sal_Int16 >(text);
+    case TYPE_INT:
+        return parseSingleValue< sal_Int32 >(text);
+    case TYPE_LONG:
+        return parseSingleValue< sal_Int64 >(text);
+    case TYPE_DOUBLE:
+        return parseSingleValue< double >(text);
+    case TYPE_STRING:
+        return parseSingleValue< OUString >(text);
+    case TYPE_HEXBINARY:
+        return parseSingleValue< css::uno::Sequence< sal_Int8 > >(text);
+    case TYPE_BOOLEAN_LIST:
+        return parseListValue< sal_Bool >(separator, text);
+    case TYPE_SHORT_LIST:
+        return parseListValue< sal_Int16 >(separator, text);
+    case TYPE_INT_LIST:
+        return parseListValue< sal_Int32 >(separator, text);
+    case TYPE_LONG_LIST:
+        return parseListValue< sal_Int64 >(separator, text);
+    case TYPE_DOUBLE_LIST:
+        return parseListValue< double >(separator, text);
+    case TYPE_STRING_LIST:
+        return parseListValue< OUString >(separator, text);
+    case TYPE_HEXBINARY_LIST:
+        return parseListValue< css::uno::Sequence< sal_Int8 > >(
+            separator, text);
+    default:
+        assert(false);
+        throw css::uno::RuntimeException("this cannot happen");
+    }
+}
+
+}
+
+ValueParser::ValueParser(int layer): type_(TYPE_ERROR), layer_(layer), state_() {}
+
+ValueParser::~ValueParser() {}
+
+xmlreader::XmlReader::Text ValueParser::getTextMode() const {
+    if (!node_)
+        return xmlreader::XmlReader::Text::NONE;
+
+    switch (state_) {
+    case State::Text:
+        if (!items_.empty()) {
+            break;
+        }
+        [[fallthrough]];
+    case State::IT:
+        return
+            (type_ == TYPE_STRING || type_ == TYPE_STRING_LIST ||
+             !separator_.isEmpty())
+            ? xmlreader::XmlReader::Text::Raw
+            : xmlreader::XmlReader::Text::Normalized;
+    default:
+        break;
+    }
+    return xmlreader::XmlReader::Text::NONE;
+}
+
+bool ValueParser::startElement(
+    xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name)
+{
+    if (!node_.is()) {
+        return false;
+    }
+    switch (state_) {
+    case State::Text:
+        if (nsId == xmlreader::XmlReader::NAMESPACE_NONE && name == "it" &&
+            isListType(type_) && separator_.isEmpty())
+        {
+            pad_.clear();
+                // before first <it>, characters are not ignored; assume they
+                // are only whitespace
+            state_ = State::IT;
+            return true;
+        }
+        [[fallthrough]];
+    case State::IT:
+        if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+            name == "unicode" &&
+            (type_ == TYPE_STRING || type_ == TYPE_STRING_LIST))
+        {
+            sal_Int32 scalar = -1;
+            for (;;) {
+                int attrNsId;
+                xmlreader::Span attrLn;
+                if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+                    break;
+                }
+                if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                    attrLn == "scalar")
+                {
+                    if (!parseValue(reader.getAttributeValue(true), &scalar)) {
+                        scalar = -1;
+                    }
+                    break;
+                }
+            }
+            if (scalar >= 0 && scalar < 0x20 && scalar != 0x09 &&
+                scalar != 0x0A && scalar != 0x0D)
+            {
+                char c = static_cast< char >(scalar);
+                pad_.add(&c, 1);
+            } else if (scalar == 0xFFFE) {
+                pad_.add(RTL_CONSTASCII_STRINGPARAM("\xEF\xBF\xBE"));
+            } else if (scalar == 0xFFFF) {
+                pad_.add(RTL_CONSTASCII_STRINGPARAM("\xEF\xBF\xBF"));
+            } else {
+                throw css::uno::RuntimeException(
+                    "bad unicode scalar attribute in " + reader.getUrl());
+            }
+            state_ = state_ == State::Text ? State::TextUnicode : State::ITUnicode;
+            return true;
+        }
+        break;
+    default:
+        break;
+    }
+    throw css::uno::RuntimeException(
+        "bad member <" + name.convertFromUtf8() + "> in " + reader.getUrl());
+}
+
+bool ValueParser::endElement() {
+    if (!node_.is()) {
+        return false;
+    }
+    switch (state_) {
+    case State::Text:
+        {
+            css::uno::Any *pValue = nullptr;
+
+            switch (node_->kind()) {
+            case Node::KIND_PROPERTY:
+                pValue = static_cast< PropertyNode * >(node_.get())->getValuePtr(layer_);
+                break;
+            case Node::KIND_LOCALIZED_PROPERTY:
+                {
+                    NodeMap & members = node_->getMembers();
+                    NodeMap::iterator i(members.find(localizedName_));
+                    LocalizedValueNode *pLVNode;
+                    if (i == members.end()) {
+                        pLVNode = new LocalizedValueNode(layer_);
+                        members.insert(
+                            NodeMap::value_type(localizedName_, pLVNode ));
+                    } else {
+                        pLVNode = static_cast< LocalizedValueNode * >(i->second.get());
+                    }
+                    pValue = pLVNode->getValuePtr(layer_);
+                }
+                break;
+            default:
+                assert(false); // this cannot happen
+                return false;
+            }
+
+            if (items_.empty()) {
+                *pValue = parseValue(separator_, pad_.get(), type_);
+                pad_.clear();
+            } else {
+                switch (type_) {
+                case TYPE_BOOLEAN_LIST:
+                    *pValue = convertItems< sal_Bool >();
+                    break;
+                case TYPE_SHORT_LIST:
+                    *pValue = convertItems< sal_Int16 >();
+                    break;
+                case TYPE_INT_LIST:
+                    *pValue = convertItems< sal_Int32 >();
+                    break;
+                case TYPE_LONG_LIST:
+                    *pValue = convertItems< sal_Int64 >();
+                    break;
+                case TYPE_DOUBLE_LIST:
+                    *pValue = convertItems< double >();
+                    break;
+                case TYPE_STRING_LIST:
+                    *pValue = convertItems< OUString >();
+                    break;
+                case TYPE_HEXBINARY_LIST:
+                    *pValue = convertItems< css::uno::Sequence< sal_Int8 > >();
+                    break;
+                default:
+                    assert(false); // this cannot happen
+                    break;
+                }
+                items_.clear();
+            }
+            separator_.clear();
+            node_.clear();
+        }
+        break;
+    case State::TextUnicode:
+        state_ = State::Text;
+        break;
+    case State::ITUnicode:
+        state_ = State::IT;
+        break;
+    case State::IT:
+        items_.push_back(
+            parseValue(OString(), pad_.get(), elementType(type_)));
+        pad_.clear();
+        state_ = State::Text;
+        break;
+    }
+    return true;
+}
+
+void ValueParser::characters(xmlreader::Span const & text) {
+    if (node_.is()) {
+        assert(state_ == State::Text || state_ == State::IT);
+        pad_.add(text.begin, text.length);
+    }
+}
+
+void ValueParser::start(
+    rtl::Reference< Node > const & node, OUString const & localizedName)
+{
+    assert(node.is() && !node_.is());
+    node_ = node;
+    localizedName_ = localizedName;
+    state_ = State::Text;
+}
+
+
+template< typename T > css::uno::Any ValueParser::convertItems() {
+    css::uno::Sequence< T > seq(items_.size());
+    auto seqRange = asNonConstRange(seq);
+    for (sal_Int32 i = 0; i < seq.getLength(); ++i) {
+        bool ok = (items_[i] >>= seqRange[i]);
+        assert(ok);
+        (void) ok; // avoid warnings
+    }
+    return css::uno::Any(seq);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/valueparser.hxx b/configmgr/source/valueparser.hxx
new file mode 100644
index 000000000..33404b838
--- /dev/null
+++ b/configmgr/source/valueparser.hxx
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <rtl/ref.hxx>
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+#include <xmlreader/pad.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "type.hxx"
+
+namespace com::sun::star::uno {
+    class Any;
+}
+namespace xmlreader { struct Span; }
+
+namespace configmgr {
+
+class Node;
+
+class ValueParser {
+public:
+    explicit ValueParser(int layer);
+
+    ~ValueParser();
+
+    xmlreader::XmlReader::Text getTextMode() const;
+
+    bool startElement(
+        xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name);
+
+    bool endElement();
+
+    void characters(xmlreader::Span const & text);
+
+    void start(
+        rtl::Reference< Node > const & property,
+        OUString const & localizedName = OUString());
+
+    int getLayer() const { return layer_;}
+
+    Type type_;
+    OString separator_;
+
+private:
+    ValueParser(const ValueParser&) = delete;
+    ValueParser& operator=(const ValueParser&) = delete;
+
+    template< typename T > css::uno::Any convertItems();
+
+    enum class State { Text, TextUnicode, IT, ITUnicode };
+
+    int layer_;
+    rtl::Reference< Node > node_;
+    OUString localizedName_;
+    State state_;
+    xmlreader::Pad pad_;
+    std::vector< css::uno::Any > items_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/winreg.cxx b/configmgr/source/winreg.cxx
new file mode 100644
index 000000000..381150fc2
--- /dev/null
+++ b/configmgr/source/winreg.cxx
@@ -0,0 +1,331 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#include <cwchar>
+#include <memory>
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <msiquery.h>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <osl/file.h>
+#include <osl/file.hxx>
+#include <o3tl/char16_t2wchar_t.hxx>
+#include "winreg.hxx"
+#include "writemodfile.hxx"
+
+#define MAX_KEY_LENGTH 255
+
+namespace configmgr {
+
+namespace {
+// This is not a generic registry reader. We assume the following structure:
+// Last element of Key becomes prop, first part is the path and optionally nodes,
+// when the node has oor:op attribute.
+// Values can be the following: Value (string), Type (string, optional),
+// Final (dword, optional), External (dword, optional), ExternalBackend (string, optional),
+// Nil (dword, optional)
+//
+// For example the following registry setting:
+// [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\LibreOffice\org.openoffice.UserProfile\Data\o]
+// "Value"="Example Corp."
+// "Final"=dword:00000001
+// becomes the following in configuration:
+// <!-- set the Company name -->
+// <item oor:path="/org.openoffice.UserProfile/Data">
+//     <prop oor:name="o" oor:finalized="true">
+//         <value>Example Corp.</value>
+//     </prop>
+// </item>
+//
+// Another example:
+// [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\LibreOffice\org.openoffice.Office.OptionsDialog\OptionsDialogGroups\ProductName/#fuse\Pages\Java/#fuse\Hide]
+// "Value"="true"
+// becomes the following in configuration:
+// <!-- Hide Tools - Options - LibreOffice - Advanced panel -->
+// <item oor:path="/org.openoffice.Office.OptionsDialog/OptionsDialogGroups">
+//     <node oor:name="ProductName" oor:op="fuse">
+//         <node oor:name="Pages">
+//             <node oor:name="Java" oor:op="fuse">
+//                 <prop oor:name="Hide">
+//                     <value>true</value>
+//                 </prop>
+//             </node>
+//         </node>
+//     </node>
+// </item>
+//
+// Third example (property of an extensible group -> needs type):
+// [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\LibreOffice\org.openoffice.Office.Jobs\Jobs\org.openoffice.Office.Jobs:Job['UpdateCheck']\Arguments\AutoCheckEnabled]
+// "Value"="false"
+// "Final"=dword:00000001
+// "Type"="xs:boolean"
+// becomes the following in configuration:
+// <item oor:path="/org.openoffice.Office.Jobs/Jobs/org.openoffice.Office.Jobs:Job['UpdateCheck']/Arguments">
+//     <prop oor:name="AutoCheckEnabled" oor:type="xs:boolean" oor:finalized="true">
+//         <value>false</value>
+//     </prop>
+// </item>
+//
+// External (component data) example:
+// [HKEY_CURRENT_USER\Software\Policies\LibreOffice\org.openoffice.UserProfile\Data\o]
+// "Value"="company"
+// "Final"=dword:00000001
+// "External"=dword:00000001
+// "ExternalBackend"="com.sun.star.configuration.backend.LdapUserProfileBe"
+// becomes the following in configuration:
+// <item oor:path="/org.openoffice.UserProfile/Data">
+//     <prop oor:name="o" oor:finalized="true">
+//         <value oor:external="com.sun.star.configuration.backend.LdapUserProfileBe company"/>
+//     </prop>
+// </item>
+//
+// Nil example:
+// Empty value (<value></value>) and nil value (<value xsi:nil="true"/>) are different.
+// In case of some path settings, the base path setting has to be cleared.
+// [HKEY_CURRENT_USER\Software\Policies\LibreOffice\org.openoffice.Office.Common\Path\Current\Work]
+// "Value"=""
+// "Final"=dword:00000001
+// "Nil"=dword:00000001
+// [HKEY_CURRENT_USER\Software\Policies\LibreOffice\org.openoffice.Office.Paths\Paths\org.openoffice.Office.Paths:NamedPath['Work']\WritePath]
+// "Value"="file:///H:/"
+// "Final"=dword:00000001
+// becomes the following in configuration:
+// <item oor:path="/org.openoffice.Office.Common/Path/Current">
+//     <prop oor:name="Work" oor:finalized="true">
+//         <value xsi:nil="true"/>
+//      </prop>
+// </item>
+// <item oor:path="/org.openoffice.Office.Paths/Paths/org.openoffice.Office.Paths:NamedPath['Work']">
+//     <prop oor:name="WritePath" oor:finalized="true">
+//         <value>file:///H:/</value>
+//     </prop>
+//  </item>
+
+void dumpWindowsRegistryKey(HKEY hKey, OUString const & aKeyName, TempFile &aFileHandle)
+{
+    HKEY hCurKey;
+
+    if(RegOpenKeyExW(
+           hKey, o3tl::toW(aKeyName.getStr()), 0,
+           KEY_READ, &hCurKey)
+       == ERROR_SUCCESS)
+    {
+        DWORD nSubKeys = 0;
+        DWORD nValues = 0;
+        DWORD nLongestValueNameLen, nLongestValueLen;
+        // Query the number of subkeys
+        RegQueryInfoKeyW(hCurKey, nullptr, nullptr, nullptr, &nSubKeys, nullptr, nullptr, &nValues, &nLongestValueNameLen, &nLongestValueLen, nullptr, nullptr);
+        if(nSubKeys)
+        {
+            //Look for subkeys in this key
+            for(DWORD i = 0; i < nSubKeys; i++)
+            {
+                wchar_t buffKeyName[MAX_KEY_LENGTH];
+                buffKeyName[0] = '\0';
+                DWORD buffSize=MAX_KEY_LENGTH;
+                OUString aSubkeyName;
+                //Get subkey name
+                RegEnumKeyExW(hCurKey, i, buffKeyName, &buffSize, nullptr, nullptr, nullptr, nullptr);
+
+                //Make up full key name
+                if(aKeyName.isEmpty())
+                    aSubkeyName = aKeyName + o3tl::toU(buffKeyName);
+                else
+                    aSubkeyName = aKeyName + "\\" + o3tl::toU(buffKeyName);
+
+                //Recursion, until no more subkeys are found
+                dumpWindowsRegistryKey(hKey, aSubkeyName, aFileHandle);
+            }
+        }
+        else if(nValues)
+        {
+            // No more subkeys, we are at a leaf
+            auto pValueName = std::unique_ptr<wchar_t[]>(
+                new wchar_t[nLongestValueNameLen + 1]);
+            auto pValue = std::unique_ptr<wchar_t[]>(
+                new wchar_t[nLongestValueLen/sizeof(wchar_t) + 1]);
+
+            bool bFinal = false;
+            bool bExternal = false;
+            bool bNil = false;
+            OUString aValue;
+            OUString aType;
+            OUString aExternalBackend;
+
+            for(DWORD i = 0; i < nValues; ++i)
+            {
+                DWORD nValueNameLen = nLongestValueNameLen + 1;
+                DWORD nValueLen = nLongestValueLen + 1;
+
+                RegEnumValueW(hCurKey, i, pValueName.get(), &nValueNameLen, nullptr, nullptr, reinterpret_cast<LPBYTE>(pValue.get()), &nValueLen);
+
+                if (!wcscmp(pValueName.get(), L"Value"))
+                    aValue = o3tl::toU(pValue.get());
+                else if (!wcscmp(pValueName.get(), L"Type"))
+                    aType = o3tl::toU(pValue.get());
+                else if (!wcscmp(pValueName.get(), L"Final"))
+                {
+                    if (*reinterpret_cast<DWORD*>(pValue.get()) == 1)
+                        bFinal = true;
+                }
+                else if (!wcscmp(pValueName.get(), L"Nil"))
+                {
+                    if (*reinterpret_cast<DWORD*>(pValue.get()) == 1)
+                        bNil = true;
+                }
+                else if (!wcscmp(pValueName.get(), L"External"))
+                {
+                    if (*reinterpret_cast<DWORD*>(pValue.get()) == 1)
+                        bExternal = true;
+                }
+                else if (!wcscmp(pValueName.get(), L"ExternalBackend"))
+                    aExternalBackend = o3tl::toU(pValue.get());
+            }
+            if (bExternal)
+            {
+                // type and external are mutually exclusive
+                aType.clear();
+
+                // Prepend backend, like in
+                // "com.sun.star.configuration.backend.LdapUserProfileBe company"
+                if (!aExternalBackend.isEmpty())
+                    aValue = aExternalBackend + " " + aValue;
+            }
+
+            sal_Int32 aLastSeparator = aKeyName.lastIndexOf('\\');
+            OUString aPathAndNodes = aKeyName.copy(0, aLastSeparator);
+            OUString aProp = aKeyName.copy(aLastSeparator + 1);
+            bool bHasNode = false;
+            sal_Int32 nCloseNode = 0;
+
+            aFileHandle.writeString("<item oor:path=\"");
+            for(sal_Int32 nIndex = 0;;)
+            {
+                OUString aNextPathPart = aPathAndNodes.getToken(0, '\\', nIndex);
+
+                if(!aNextPathPart.isEmpty())
+                {
+                    if((aNextPathPart.lastIndexOf("/#") != -1) || bHasNode)
+                    {
+                        bHasNode = true;
+                        nCloseNode++;
+                        aFileHandle.writeString("\"><node oor:name=\"");
+                        sal_Int32 nCommandSeparator = aNextPathPart.lastIndexOf('#');
+                        if(nCommandSeparator != -1)
+                        {
+                            OUString aNodeOp = aNextPathPart.copy(nCommandSeparator + 1);
+                            writeAttributeValue(aFileHandle, aNextPathPart.subView(0, nCommandSeparator - 1));
+                            aFileHandle.writeString("\" oor:op=\"");
+                            writeAttributeValue(aFileHandle, aNodeOp);
+                        }
+                        else
+                        {
+                            writeAttributeValue(aFileHandle, aNextPathPart);
+                        }
+                    }
+                    else
+                    {
+                        writeAttributeValue(
+                            aFileHandle, OUStringConcatenation("/" + aNextPathPart));
+                    }
+                }
+                else
+                {
+                    aFileHandle.writeString("\">");
+                    break;
+                }
+            }
+
+            aFileHandle.writeString("<prop oor:name=\"");
+            writeAttributeValue(aFileHandle, aProp);
+            aFileHandle.writeString("\"");
+            if(!aType.isEmpty())
+            {
+                aFileHandle.writeString(" oor:type=\"");
+                writeAttributeValue(aFileHandle, aType);
+                aFileHandle.writeString("\"");
+            }
+            if(bFinal)
+                aFileHandle.writeString(" oor:finalized=\"true\"");
+            aFileHandle.writeString("><value");
+            if (aValue.isEmpty() && bNil)
+            {
+                aFileHandle.writeString(" xsi:nil=\"true\"/");
+            }
+            else if (bExternal)
+            {
+                aFileHandle.writeString(" oor:external=\"");
+                writeAttributeValue(aFileHandle, aValue);
+                aFileHandle.writeString("\"/");
+            }
+            else
+            {
+                aFileHandle.writeString(">");
+                writeValueContent(aFileHandle, aValue);
+                aFileHandle.writeString("</value");
+            }
+            aFileHandle.writeString("></prop>");
+            for(; nCloseNode > 0; nCloseNode--)
+                aFileHandle.writeString("</node>");
+            aFileHandle.writeString("</item>\n");
+        }
+        RegCloseKey(hCurKey);
+    }
+}
+}
+
+bool dumpWindowsRegistry(OUString* pFileURL, WinRegType eType)
+{
+    HKEY hKey;
+    HKEY hDomain = eType == LOCAL_MACHINE ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
+    if(RegOpenKeyExW(hDomain, L"SOFTWARE\\Policies\\LibreOffice", 0, KEY_READ, &hKey) != ERROR_SUCCESS)
+    {
+        SAL_INFO(
+            "configmgr",
+            ("Windows registry settings do not exist in HKLM\\SOFTWARE\\Policies\\LibreOffice"));
+        return false;
+    }
+
+    TempFile aFileHandle;
+    switch (osl::FileBase::createTempFile(nullptr, &aFileHandle.handle, pFileURL)) {
+    case osl::FileBase::E_None:
+        break;
+    case osl::FileBase::E_ACCES:
+        SAL_INFO(
+            "configmgr",
+            ("cannot create temp Windows registry dump (E_ACCES)"));
+        return false;
+    default:
+        throw css::uno::RuntimeException(
+            "cannot create temporary file");
+    }
+    aFileHandle.url = *pFileURL;
+    aFileHandle.writeString(
+        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<oor:items"
+        " xmlns:oor=\"http://openoffice.org/2001/registry\""
+        " xmlns:xs=\"http://www.w3.org/2001/XMLSchema\""
+        " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n");
+    dumpWindowsRegistryKey(hKey, "", aFileHandle);
+    aFileHandle.writeString("</oor:items>");
+    oslFileError e = aFileHandle.closeWithoutUnlink();
+    if (e != osl_File_E_None)
+        SAL_WARN("configmgr", "osl_closeFile failed with " << +e);
+    RegCloseKey(hKey);
+    return true;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/winreg.hxx b/configmgr/source/winreg.hxx
new file mode 100644
index 000000000..132a1f6d4
--- /dev/null
+++ b/configmgr/source/winreg.hxx
@@ -0,0 +1,21 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#pragma once
+
+namespace configmgr {
+
+enum WinRegType { LOCAL_MACHINE, CURRENT_USER };
+
+bool dumpWindowsRegistry(OUString* pFileURL, WinRegType eType);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/writemodfile.cxx b/configmgr/source/writemodfile.cxx
new file mode 100644
index 000000000..09fe0949b
--- /dev/null
+++ b/configmgr/source/writemodfile.cxx
@@ -0,0 +1,640 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <cstddef>
+#include <limits>
+#include <string_view>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <o3tl/safeint.hxx>
+#include <osl/file.h>
+#include <osl/file.hxx>
+#include <rtl/string.h>
+#include <rtl/string.hxx>
+#include <rtl/textcvt.h>
+#include <rtl/textenc.h>
+#include <rtl/ustring.hxx>
+#include <rtl/strbuf.hxx>
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <xmlreader/span.hxx>
+
+#include "data.hxx"
+#include "groupnode.hxx"
+#include "localizedpropertynode.hxx"
+#include "localizedvaluenode.hxx"
+#include "modifications.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "propertynode.hxx"
+#include "type.hxx"
+#include "writemodfile.hxx"
+
+namespace configmgr {
+
+class Components;
+
+namespace {
+
+OString convertToUtf8(std::u16string_view text) {
+    OString s;
+    assert(text.size() <= o3tl::make_unsigned(std::numeric_limits<sal_Int32>::max()));
+    if (!rtl_convertUStringToString(
+            &s.pData, text.data(), text.size(),
+            RTL_TEXTENCODING_UTF8,
+            (RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |
+             RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR)))
+    {
+        throw css::uno::RuntimeException(
+            "cannot convert to UTF-8");
+    }
+    return s;
+}
+
+} // anonymous namespace
+
+TempFile::~TempFile() {
+    if (handle == nullptr)
+        return;
+
+    if (!closed) {
+        oslFileError e = osl_closeFile(handle);
+        if (e != osl_File_E_None) {
+            SAL_WARN("configmgr", "osl_closeFile failed with " << +e);
+        }
+    }
+    osl::FileBase::RC e = osl::File::remove(url);
+    if (e != osl::FileBase::E_None) {
+        SAL_WARN(
+            "configmgr",
+            "osl::File::remove(" << url << ") failed with " << +e);
+    }
+}
+
+#ifdef _WIN32
+oslFileError TempFile::closeWithoutUnlink() {
+    flush();
+    oslFileError e = osl_closeFile(handle);
+    handle = nullptr;
+    closed = true;
+    return e;
+}
+#endif
+
+void TempFile::closeAndRename(const OUString &_url) {
+    oslFileError e = flush();
+    if (e != osl_File_E_None) {
+        throw css::uno::RuntimeException(
+            "cannot write to " + url);
+    }
+    e = osl_closeFile(handle);
+    closed = true;
+    if (e != osl_File_E_None) {
+        throw css::uno::RuntimeException(
+            "cannot close " + url);
+    }
+    if (osl::File::replace(url, _url) != osl::FileBase::E_None) {
+        throw css::uno::RuntimeException(
+            "cannot move " + url);
+    }
+    handle = nullptr;
+}
+
+oslFileError TempFile::flush() {
+    oslFileError e = osl_File_E_None;
+    if (!buffer.isEmpty()) {
+        sal_uInt64 nBytesWritten = 0;
+        e = osl_writeFile(handle, buffer.getStr(),
+                          static_cast< sal_uInt32 >(buffer.getLength()),
+                          &nBytesWritten);
+        if (nBytesWritten != static_cast< sal_uInt32 >(buffer.getLength())) {
+            // queue up any error / exception until close.
+            buffer.remove(0, static_cast< sal_Int32 >( nBytesWritten ) );
+        } else {
+            buffer.setLength(0);
+        }
+    }
+    return e;
+}
+
+void TempFile::writeString(std::string_view text) {
+    buffer.append(text.data(), text.size());
+    if (buffer.getLength() > 0x10000)
+        flush();
+}
+
+namespace {
+
+void writeValueContent_(TempFile &, bool) = delete;
+    // silence loplugin:salbool
+void writeValueContent_(TempFile &handle, sal_Bool value) {
+    if (value) {
+        handle.writeString("true");
+    } else {
+        handle.writeString("false");
+    }
+}
+
+void writeValueContent_(TempFile &handle, sal_Int16 value) {
+    handle.writeString(OString::number(value));
+}
+
+void writeValueContent_(TempFile &handle, sal_Int32 value) {
+    handle.writeString(OString::number(value));
+}
+
+void writeValueContent_(TempFile &handle, sal_Int64 value) {
+    handle.writeString(OString::number(value));
+}
+
+void writeValueContent_(TempFile &handle, double value) {
+    handle.writeString(OString::number(value));
+}
+
+void writeValueContent_(TempFile &handle, std::u16string_view value) {
+    writeValueContent(handle, value);
+}
+
+void writeValueContent_(
+    TempFile &handle, css::uno::Sequence< sal_Int8 > const & value)
+{
+    for (const auto & v : value) {
+        static char const hexDigit[16] = {
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C',
+            'D', 'E', 'F' };
+        handle.writeString(
+            std::string_view(hexDigit + ((v >> 4) & 0xF), 1));
+        handle.writeString(std::string_view(hexDigit + (v & 0xF), 1));
+    }
+}
+
+template< typename T > void writeSingleValue(
+    TempFile &handle, css::uno::Any const & value)
+{
+    handle.writeString(">");
+    T val = T();
+    value >>= val;
+    writeValueContent_(handle, val);
+    handle.writeString("</value>");
+}
+
+template< typename T > void writeListValue(
+    TempFile &handle, css::uno::Any const & value)
+{
+    handle.writeString(">");
+    css::uno::Sequence< T > val;
+    value >>= val;
+    for (sal_Int32 i = 0; i < val.getLength(); ++i) {
+        if (i != 0) {
+            handle.writeString(" ");
+        }
+        writeValueContent_(handle, std::as_const(val)[i]);
+    }
+    handle.writeString("</value>");
+}
+
+template< typename T > void writeItemListValue(
+    TempFile &handle, css::uno::Any const & value)
+{
+    handle.writeString(">");
+    css::uno::Sequence< T > val;
+    value >>= val;
+    for (const auto & i : std::as_const(val)) {
+        handle.writeString("<it>");
+        writeValueContent_(handle, i);
+        handle.writeString("</it>");
+    }
+    handle.writeString("</value>");
+}
+
+void writeValue(TempFile &handle, Type type, css::uno::Any const & value) {
+    switch (type) {
+    case TYPE_BOOLEAN:
+        writeSingleValue< sal_Bool >(handle, value);
+        break;
+    case TYPE_SHORT:
+        writeSingleValue< sal_Int16 >(handle, value);
+        break;
+    case TYPE_INT:
+        writeSingleValue< sal_Int32 >(handle, value);
+        break;
+    case TYPE_LONG:
+        writeSingleValue< sal_Int64 >(handle, value);
+        break;
+    case TYPE_DOUBLE:
+        writeSingleValue< double >(handle, value);
+        break;
+    case TYPE_STRING:
+        writeSingleValue< OUString >(handle, value);
+        break;
+    case TYPE_HEXBINARY:
+        writeSingleValue< css::uno::Sequence< sal_Int8 > >(handle, value);
+        break;
+    case TYPE_BOOLEAN_LIST:
+        writeListValue< sal_Bool >(handle, value);
+        break;
+    case TYPE_SHORT_LIST:
+        writeListValue< sal_Int16 >(handle, value);
+        break;
+    case TYPE_INT_LIST:
+        writeListValue< sal_Int32 >(handle, value);
+        break;
+    case TYPE_LONG_LIST:
+        writeListValue< sal_Int64 >(handle, value);
+        break;
+    case TYPE_DOUBLE_LIST:
+        writeListValue< double >(handle, value);
+        break;
+    case TYPE_STRING_LIST:
+        writeItemListValue< OUString >(handle, value);
+        break;
+    case TYPE_HEXBINARY_LIST:
+        writeItemListValue< css::uno::Sequence< sal_Int8 > >(handle, value);
+        break;
+    default: // TYPE_ERROR, TYPE_NIL, TYPE_ANY
+        assert(false); // this cannot happen
+    }
+}
+
+void writeNode(
+    Components & components, TempFile &handle,
+    rtl::Reference< Node > const & parent, std::u16string_view name,
+    rtl::Reference< Node > const & node)
+{
+    static xmlreader::Span const typeNames[] = {
+        xmlreader::Span(), xmlreader::Span(), xmlreader::Span(),
+            // TYPE_ERROR, TYPE_NIL, TYPE_ANY
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:boolean")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:short")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:int")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:long")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:double")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:string")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("xs:hexBinary")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:boolean-list")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:short-list")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:int-list")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:long-list")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:double-list")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:string-list")),
+        xmlreader::Span(RTL_CONSTASCII_STRINGPARAM("oor:hexBinary-list")) };
+    switch (node->kind()) {
+    case Node::KIND_PROPERTY:
+        {
+            PropertyNode * prop = static_cast< PropertyNode * >(node.get());
+            handle.writeString("<prop oor:name=\"");
+            writeAttributeValue(handle, name);
+            handle.writeString("\" oor:op=\"fuse\"");
+            Type type = prop->getStaticType();
+            Type dynType = getDynamicType(prop->getValue(components));
+            assert(dynType != TYPE_ERROR);
+            if (type == TYPE_ANY) {
+                type = dynType;
+                if (type != TYPE_NIL) {
+                    handle.writeString(" oor:type=\"");
+                    handle.writeString(
+                        std::string_view(
+                            typeNames[type].begin, typeNames[type].length));
+                    handle.writeString("\"");
+                }
+            }
+            handle.writeString("><value");
+            if (dynType == TYPE_NIL) {
+                handle.writeString(" xsi:nil=\"true\"/>");
+            } else {
+                writeValue(handle, type, prop->getValue(components));
+            }
+            handle.writeString("</prop>");
+        }
+        break;
+    case Node::KIND_LOCALIZED_PROPERTY:
+        handle.writeString("<prop oor:name=\"");
+        writeAttributeValue(handle, name);
+        handle.writeString("\" oor:op=\"fuse\">");
+        for (auto const& member : node->getMembers())
+        {
+            writeNode(components, handle, node, member.first, member.second);
+        }
+        handle.writeString("</prop>");
+        break;
+    case Node::KIND_LOCALIZED_VALUE:
+        {
+            handle.writeString("<value");
+            if (!name.empty()) {
+                handle.writeString(" xml:lang=\"");
+                writeAttributeValue(handle, name);
+                handle.writeString("\"");
+            }
+            Type type = static_cast< LocalizedPropertyNode * >(parent.get())->
+                getStaticType();
+            css::uno::Any value(
+                static_cast< LocalizedValueNode * >(node.get())->getValue());
+            Type dynType = getDynamicType(value);
+            assert(dynType != TYPE_ERROR);
+            if (type == TYPE_ANY) {
+                type = dynType;
+                if (type != TYPE_NIL) {
+                    handle.writeString(" oor:type=\"");
+                    handle.writeString(
+                        std::string_view(
+                            typeNames[type].begin, typeNames[type].length));
+                    handle.writeString("\"");
+                }
+            }
+            if (dynType == TYPE_NIL) {
+                handle.writeString(" xsi:nil=\"true\"/>");
+            } else {
+                writeValue(handle, type, value);
+            }
+        }
+        break;
+    case Node::KIND_GROUP:
+    case Node::KIND_SET:
+        handle.writeString("<node oor:name=\"");
+        writeAttributeValue(handle, name);
+        if (!node->getTemplateName().isEmpty()) { // set member
+            handle.writeString("\" oor:op=\"replace");
+        }
+        handle.writeString("\">");
+        for (auto const& member : node->getMembers())
+        {
+            writeNode(components, handle, node, member.first, member.second);
+        }
+        handle.writeString("</node>");
+        break;
+    case Node::KIND_ROOT:
+        assert(false); // this cannot happen
+        break;
+    }
+}
+
+// helpers to allow sorting of configmgr::Modifications::Node
+typedef std::pair< const OUString, configmgr::Modifications::Node > ModNodePairEntry;
+struct PairEntrySorter
+{
+    bool operator() (const ModNodePairEntry* pValue1, const ModNodePairEntry* pValue2) const
+    {
+        return pValue1->first.compareTo(pValue2->first) < 0;
+    }
+};
+
+void writeModifications(
+    Components & components, TempFile &handle,
+    std::u16string_view parentPathRepresentation,
+    rtl::Reference< Node > const & parent, OUString const & nodeName,
+    rtl::Reference< Node > const & node,
+    Modifications::Node const & modifications)
+{
+    // It is never necessary to write oor:finalized or oor:mandatory attributes,
+    // as they cannot be set via the UNO API.
+    if (modifications.children.empty()) {
+        assert(parent.is());
+            // components themselves have no parent but must have children
+        handle.writeString("<item oor:path=\"");
+        writeAttributeValue(handle, parentPathRepresentation);
+        handle.writeString("\">");
+        if (node.is()) {
+            writeNode(components, handle, parent, nodeName, node);
+        } else {
+            switch (parent->kind()) {
+            case Node::KIND_LOCALIZED_PROPERTY:
+                handle.writeString("<value");
+                if (!nodeName.isEmpty()) {
+                    handle.writeString(" xml:lang=\"");
+                    writeAttributeValue(handle, nodeName);
+                    handle.writeString("\"");
+                }
+                handle.writeString(" oor:op=\"remove\"/>");
+                break;
+            case Node::KIND_GROUP:
+                assert(
+                    static_cast< GroupNode * >(parent.get())->isExtensible());
+                handle.writeString("<prop oor:name=\"");
+                writeAttributeValue(handle, nodeName);
+                handle.writeString("\" oor:op=\"remove\"/>");
+                break;
+            case Node::KIND_SET:
+                handle.writeString("<node oor:name=\"");
+                writeAttributeValue(handle, nodeName);
+                handle.writeString("\" oor:op=\"remove\"/>");
+                break;
+            default:
+                assert(false); // this cannot happen
+                break;
+            }
+        }
+        handle.writeString("</item>\n");
+    } else {
+        assert(node.is());
+        OUString pathRep(
+            OUString::Concat(parentPathRepresentation) + "/" +
+            Data::createSegment(node->getTemplateName(), nodeName));
+
+        // copy configmgr::Modifications::Node's to a sortable list. Use pointers
+        // to just reference the data instead of copying it
+        std::vector< const ModNodePairEntry* > ModNodePairEntryVector;
+        ModNodePairEntryVector.reserve(modifications.children.size());
+
+        for (const auto& rCand : modifications.children)
+        {
+            ModNodePairEntryVector.push_back(&rCand);
+        }
+
+        // sort the list
+        std::sort(ModNodePairEntryVector.begin(), ModNodePairEntryVector.end(), PairEntrySorter());
+
+        // now use the list to write entries in sorted order
+        // instead of random as from the unordered map
+        for (const auto & i : ModNodePairEntryVector)
+        {
+            writeModifications(
+                components, handle, pathRep, node, i->first,
+                node->getMember(i->first), i->second);
+        }
+    }
+}
+
+}
+
+void writeAttributeValue(TempFile &handle, std::u16string_view value) {
+    std::size_t i = 0;
+    std::size_t j = i;
+    for (; j != value.size(); ++j) {
+        assert(
+            value[j] == 0x0009 || value[j] == 0x000A || value[j] == 0x000D ||
+            (value[j] >= 0x0020 && value[j] != 0xFFFE && value[j] != 0xFFFF));
+        switch(value[j]) {
+        case '\x09':
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&#9;");
+            i = j + 1;
+            break;
+        case '\x0A':
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&#xA;");
+            i = j + 1;
+            break;
+        case '\x0D':
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&#xD;");
+            i = j + 1;
+            break;
+        case '"':
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&quot;");
+            i = j + 1;
+            break;
+        case '&':
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&amp;");
+            i = j + 1;
+            break;
+        case '<':
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&lt;");
+            i = j + 1;
+            break;
+        default:
+            break;
+        }
+    }
+    handle.writeString(convertToUtf8(value.substr(i, j - i)));
+}
+
+void writeValueContent(TempFile &handle, std::u16string_view value) {
+    std::size_t i = 0;
+    std::size_t j = i;
+    for (; j != value.size(); ++j) {
+        char16_t c = value[j];
+        if ((c < 0x0020 && c != 0x0009 && c != 0x000A && c != 0x000D) ||
+            c == 0xFFFE || c == 0xFFFF)
+        {
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("<unicode oor:scalar=\"");
+            handle.writeString(OString::number(c));
+            handle.writeString("\"/>");
+            i = j + 1;
+        } else if (c == '\x0D') {
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&#xD;");
+            i = j + 1;
+        } else if (c == '&') {
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&amp;");
+            i = j + 1;
+        } else if (c == '<') {
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&lt;");
+            i = j + 1;
+        } else if (c == '>') {
+            // "MUST, for compatibility, be escaped [...] when it appears in the
+            // string ']]>'":
+            handle.writeString(convertToUtf8(value.substr(i, j - i)));
+            handle.writeString("&gt;");
+            i = j + 1;
+        }
+    }
+    handle.writeString(convertToUtf8(value.substr(i, j - i)));
+}
+
+void writeModFile(
+    Components & components, OUString const & url, Data const & data)
+{
+    sal_Int32 i = url.lastIndexOf('/');
+    assert(i != -1);
+    OUString dir(url.copy(0, i));
+    switch (osl::Directory::createPath(dir)) {
+    case osl::FileBase::E_None:
+    case osl::FileBase::E_EXIST:
+        break;
+    case osl::FileBase::E_ACCES:
+        SAL_INFO(
+            "configmgr",
+            ("cannot create registrymodifications.xcu path (E_ACCES); changes"
+             " will be lost"));
+        return;
+    default:
+        throw css::uno::RuntimeException(
+            "cannot create directory " + dir);
+    }
+    TempFile tmp;
+    switch (osl::FileBase::createTempFile(&dir, &tmp.handle, &tmp.url)) {
+    case osl::FileBase::E_None:
+        break;
+    case osl::FileBase::E_ACCES:
+        SAL_INFO(
+            "configmgr",
+            ("cannot create temp registrymodifications.xcu (E_ACCES); changes"
+             " will be lost"));
+        return;
+    default:
+        throw css::uno::RuntimeException(
+            "cannot create temporary file in " + dir);
+    }
+    tmp.writeString(
+        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<oor:items"
+        " xmlns:oor=\"http://openoffice.org/2001/registry\""
+        " xmlns:xs=\"http://www.w3.org/2001/XMLSchema\""
+        " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n");
+    //TODO: Do not write back information about those removed items that did not
+    // come from the .xcs/.xcu files, anyway (but had been added dynamically
+    // instead):
+
+    // For profilesafemode it is necessary to detect changes in the
+    // registrymodifications file, this is done based on file size in bytes and crc32.
+    // Unfortunately this write is based on writing unordered map entries, which creates
+    // valid and semantically equal XML-Files, bubt with different crc32 checksums. For
+    // the future usage it will be preferable to have easily comparable config files
+    // which is guaranteed by writing the entries in sorted order. Indeed with this change
+    // (and in the recursive writeModifications call) the same config files get written
+
+    // copy configmgr::Modifications::Node's to a sortable list. Use pointers
+    // to just reference the data instead of copying it
+    std::vector< const ModNodePairEntry* > ModNodePairEntryVector;
+    ModNodePairEntryVector.reserve(data.modifications.getRoot().children.size());
+
+    for (const auto& rCand : data.modifications.getRoot().children)
+    {
+        ModNodePairEntryVector.push_back(&rCand);
+    }
+
+    // sort the list
+    std::sort(ModNodePairEntryVector.begin(), ModNodePairEntryVector.end(), PairEntrySorter());
+
+    // now use the list to write entries in sorted order
+    // instead of random as from the unordered map
+    for (const auto& j : ModNodePairEntryVector)
+    {
+        writeModifications(
+            components, tmp, u"", rtl::Reference< Node >(), j->first,
+            data.getComponents().findNode(Data::NO_LAYER, j->first),
+            j->second);
+    }
+    tmp.writeString("</oor:items>\n");
+    tmp.closeAndRename(url);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/writemodfile.hxx b/configmgr/source/writemodfile.hxx
new file mode 100644
index 000000000..d663321d4
--- /dev/null
+++ b/configmgr/source/writemodfile.hxx
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <rtl/strbuf.hxx>
+#include <rtl/ustring.hxx>
+#include <osl/file.h>
+
+namespace configmgr {
+
+class Components;
+struct Data;
+
+struct TempFile {
+    OUString url;
+    oslFileHandle handle;
+    bool closed;
+    OStringBuffer buffer;
+
+    TempFile(): handle(nullptr), closed(false) {}
+    ~TempFile();
+    void closeAndRename(const OUString &url);
+    oslFileError flush();
+#ifdef _WIN32
+    oslFileError closeWithoutUnlink();
+#endif
+    void writeString(std::string_view text);
+
+private:
+    TempFile(const TempFile&) = delete;
+    TempFile& operator=(const TempFile&) = delete;
+};
+
+void writeAttributeValue(TempFile &handle, std::u16string_view value);
+void writeValueContent(TempFile &handle, std::u16string_view value);
+
+void writeModFile(
+    Components & components, OUString const & url, Data const & data);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xcdparser.cxx b/configmgr/source/xcdparser.cxx
new file mode 100644
index 000000000..a069c6b99
--- /dev/null
+++ b/configmgr/source/xcdparser.cxx
@@ -0,0 +1,174 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <climits>
+#include <set>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/ustring.hxx>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "parsemanager.hxx"
+#include "xcdparser.hxx"
+#include "xcsparser.hxx"
+#include "xcuparser.hxx"
+#include "xmldata.hxx"
+
+namespace configmgr {
+
+XcdParser::XcdParser(
+    int layer, std::set< OUString > const & processedDependencies, Data & data):
+    layer_(layer), processedDependencies_(processedDependencies), data_(data),
+    state_(STATE_START), dependencyOptional_(), nesting_()
+{}
+
+XcdParser::~XcdParser() {}
+
+xmlreader::XmlReader::Text XcdParser::getTextMode() {
+    return nestedParser_.is()
+        ? nestedParser_->getTextMode() : xmlreader::XmlReader::Text::NONE;
+}
+
+bool XcdParser::startElement(
+    xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+    std::set< OUString > const * existingDependencies)
+{
+    if (nestedParser_.is()) {
+        assert(nesting_ != LONG_MAX);
+        ++nesting_;
+        return nestedParser_->startElement(
+            reader, nsId, name, existingDependencies);
+    }
+    switch (state_) {
+    case STATE_START:
+        if (nsId == ParseManager::NAMESPACE_OOR && name == "data") {
+            state_ = STATE_DEPENDENCIES;
+            return true;
+        }
+        break;
+    case STATE_DEPENDENCIES:
+        if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+            name == "dependency")
+        {
+            if (dependencyFile_.isEmpty()) {
+                dependencyOptional_ = false;
+                xmlreader::Span attrFile;
+                for (;;) {
+                    int attrNsId;
+                    xmlreader::Span attrLn;
+                    if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+                        break;
+                    }
+                    if (attrNsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                            //TODO: _OOR
+                        attrLn == "file")
+                    {
+                        attrFile = reader.getAttributeValue(false);
+                    } else if ((attrNsId ==
+                                xmlreader::XmlReader::NAMESPACE_NONE) &&
+                               attrLn == "optional")
+                    {
+                        dependencyOptional_ = xmldata::parseBoolean(
+                            reader.getAttributeValue(true));
+                    }
+                }
+                if (!attrFile.is()) {
+                    throw css::uno::RuntimeException(
+                        "no dependency file attribute in " + reader.getUrl());
+                }
+                dependencyFile_ = attrFile.convertFromUtf8();
+                if (dependencyFile_.isEmpty()) {
+                    throw css::uno::RuntimeException(
+                        "bad dependency file attribute in " + reader.getUrl());
+                }
+            }
+            if ((processedDependencies_.find(dependencyFile_) ==
+                 processedDependencies_.end()) &&
+                (!dependencyOptional_ || existingDependencies == nullptr ||
+                 (existingDependencies->find(dependencyFile_) !=
+                  existingDependencies->end())))
+            {
+                return false;
+            }
+            state_ = STATE_DEPENDENCY;
+            dependencyFile_.clear();
+            return true;
+        }
+        state_ = STATE_COMPONENTS;
+        [[fallthrough]];
+    case STATE_COMPONENTS:
+        if (nsId == ParseManager::NAMESPACE_OOR &&
+            name == "component-schema")
+        {
+            nestedParser_ = new XcsParser(layer_, data_);
+            nesting_ = 1;
+            return nestedParser_->startElement(
+                reader, nsId, name, existingDependencies);
+        }
+        if (nsId == ParseManager::NAMESPACE_OOR &&
+            (name == "component-data" || name == "items"))
+        {
+            nestedParser_ = new XcuParser(layer_ + 1, data_, nullptr, nullptr, nullptr);
+            nesting_ = 1;
+            return nestedParser_->startElement(
+                reader, nsId, name, existingDependencies);
+        }
+        break;
+    default: // STATE_DEPENDENCY
+        assert(false); // this cannot happen
+        break;
+    }
+    throw css::uno::RuntimeException(
+        "bad member <" + name.convertFromUtf8() + "> in " + reader.getUrl());
+}
+
+void XcdParser::endElement(xmlreader::XmlReader const & reader) {
+    if (nestedParser_.is()) {
+        nestedParser_->endElement(reader);
+        if (--nesting_ == 0) {
+            nestedParser_.clear();
+        }
+    } else {
+        switch (state_) {
+        case STATE_DEPENDENCY:
+            state_ = STATE_DEPENDENCIES;
+            break;
+        case STATE_DEPENDENCIES:
+        case STATE_COMPONENTS:
+            break;
+        default:
+            assert(false); // this cannot happen
+            break;
+        }
+    }
+}
+
+void XcdParser::characters(xmlreader::Span const & text) {
+    if (nestedParser_.is()) {
+        nestedParser_->characters(text);
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xcdparser.hxx b/configmgr/source/xcdparser.hxx
new file mode 100644
index 000000000..1ca32931e
--- /dev/null
+++ b/configmgr/source/xcdparser.hxx
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "parser.hxx"
+
+namespace xmlreader { struct Span; }
+
+namespace configmgr {
+
+struct Data;
+
+class XcdParser: public Parser {
+public:
+    XcdParser(
+        int layer, std::set< OUString > const & processedDependencies,
+        Data & data);
+
+private:
+    virtual ~XcdParser() override;
+
+    virtual xmlreader::XmlReader::Text getTextMode() override;
+
+    virtual bool startElement(
+        xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+        std::set< OUString > const * existingDependencies) override;
+
+    virtual void endElement(xmlreader::XmlReader const & reader) override;
+
+    virtual void characters(xmlreader::Span const & text) override;
+
+    enum State {
+        STATE_START, STATE_DEPENDENCIES, STATE_DEPENDENCY, STATE_COMPONENTS };
+
+    int layer_;
+    std::set< OUString > const & processedDependencies_;
+    Data & data_;
+    State state_;
+    OUString dependencyFile_;
+    bool dependencyOptional_;
+    rtl::Reference< Parser > nestedParser_;
+    long nesting_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xcsparser.cxx b/configmgr/source/xcsparser.cxx
new file mode 100644
index 000000000..947792c0a
--- /dev/null
+++ b/configmgr/source/xcsparser.cxx
@@ -0,0 +1,596 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <set>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/ref.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "data.hxx"
+#include "localizedpropertynode.hxx"
+#include "groupnode.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "parsemanager.hxx"
+#include "propertynode.hxx"
+#include "setnode.hxx"
+#include "xcsparser.hxx"
+#include "xmldata.hxx"
+
+namespace configmgr {
+
+namespace {
+
+// Conservatively merge a template or component (and its recursive parts) into
+// an existing instance:
+void merge(
+    rtl::Reference< Node > const & original,
+    rtl::Reference< Node > const & update)
+{
+    assert(
+        original.is() && update.is() && original->kind() == update->kind() &&
+        update->getFinalized() == Data::NO_LAYER);
+    if (update->getLayer() < original->getLayer() ||
+        update->getLayer() > original->getFinalized())
+        return;
+
+    switch (original->kind()) {
+    case Node::KIND_PROPERTY:
+    case Node::KIND_LOCALIZED_PROPERTY:
+    case Node::KIND_LOCALIZED_VALUE:
+        break; //TODO: merge certain parts?
+    case Node::KIND_GROUP:
+        for (auto const& updateMember : update->getMembers())
+        {
+            NodeMap & members = original->getMembers();
+            NodeMap::iterator i1(members.find(updateMember.first));
+            if (i1 == members.end()) {
+                if (updateMember.second->kind() == Node::KIND_PROPERTY &&
+                    static_cast< GroupNode * >(
+                        original.get())->isExtensible())
+                {
+                    members.insert(updateMember);
+                }
+            } else if (updateMember.second->kind() == i1->second->kind()) {
+                merge(i1->second, updateMember.second);
+            }
+        }
+        break;
+    case Node::KIND_SET:
+        for (auto const& updateMember : update->getMembers())
+        {
+            NodeMap & members = original->getMembers();
+            NodeMap::iterator i1(members.find(updateMember.first));
+            if (i1 == members.end()) {
+                if (static_cast< SetNode * >(original.get())->
+                    isValidTemplate(updateMember.second->getTemplateName()))
+                {
+                    members.insert(updateMember);
+                }
+            } else if (updateMember.second->kind() == i1->second->kind() &&
+                       (updateMember.second->getTemplateName() ==
+                        i1->second->getTemplateName()))
+            {
+                merge(i1->second, updateMember.second);
+            }
+        }
+        break;
+    case Node::KIND_ROOT:
+        assert(false); // this cannot happen
+        break;
+    }
+}
+
+}
+
+XcsParser::XcsParser(int layer, Data & data):
+    valueParser_(layer), data_(data), state_(STATE_START), ignoring_()
+{}
+
+XcsParser::~XcsParser() {}
+
+xmlreader::XmlReader::Text XcsParser::getTextMode() {
+    return valueParser_.getTextMode();
+}
+
+bool XcsParser::startElement(
+    xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+    std::set< OUString > const * /*existingDependencies*/)
+{
+    if (valueParser_.startElement(reader, nsId, name)) {
+        return true;
+    }
+    if (state_ == STATE_START) {
+        if (nsId == ParseManager::NAMESPACE_OOR &&
+            name == "component-schema")
+        {
+            handleComponentSchema(reader);
+            state_ = STATE_COMPONENT_SCHEMA;
+            ignoring_ = 0;
+            return true;
+        }
+    } else {
+        //TODO: ignoring component-schema import, component-schema uses, and
+        // prop constraints; accepting all four at illegal places (and with
+        // illegal content):
+        if (ignoring_ > 0 ||
+            (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+             (name == "info" || name == "import" ||
+              name == "uses" || name == "constraints")))
+        {
+            assert(ignoring_ < LONG_MAX);
+            ++ignoring_;
+            return true;
+        }
+        switch (state_) {
+        case STATE_COMPONENT_SCHEMA:
+            if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                name == "templates")
+            {
+                state_ = STATE_TEMPLATES;
+                return true;
+            }
+            [[fallthrough]];
+        case STATE_TEMPLATES_DONE:
+            if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                name == "component")
+            {
+                state_ = STATE_COMPONENT;
+                assert(elements_.empty());
+                elements_.push(
+                    Element(
+                        new GroupNode(valueParser_.getLayer(), false, ""),
+                        componentName_));
+                return true;
+            }
+            break;
+        case STATE_TEMPLATES:
+            if (elements_.empty()) {
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "group")
+                {
+                    handleGroup(reader, true);
+                    return true;
+                }
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "set")
+                {
+                    handleSet(reader, true);
+                    return true;
+                }
+                break;
+            }
+            [[fallthrough]];
+        case STATE_COMPONENT:
+            assert(!elements_.empty());
+            switch (elements_.top().node->kind()) {
+            case Node::KIND_PROPERTY:
+            case Node::KIND_LOCALIZED_PROPERTY:
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "value")
+                {
+                    handlePropValue(reader, elements_.top().node);
+                    return true;
+                }
+                break;
+            case Node::KIND_GROUP:
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "prop")
+                {
+                    handleProp(reader);
+                    return true;
+                }
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "node-ref")
+                {
+                    handleNodeRef(reader);
+                    return true;
+                }
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "group")
+                {
+                    handleGroup(reader, false);
+                    return true;
+                }
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "set")
+                {
+                    handleSet(reader, false);
+                    return true;
+                }
+                break;
+            case Node::KIND_SET:
+                if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                    name == "item")
+                {
+                    handleSetItem(
+                        reader,
+                        static_cast< SetNode * >(elements_.top().node.get()));
+                    return true;
+                }
+                break;
+            default: // Node::KIND_LOCALIZED_VALUE
+                assert(false); // this cannot happen
+                break;
+            }
+            break;
+        case STATE_COMPONENT_DONE:
+            break;
+        default: // STATE_START
+            assert(false); // this cannot happen
+            break;
+        }
+    }
+    throw css::uno::RuntimeException(
+        "bad member <" + name.convertFromUtf8() + "> in " + reader.getUrl());
+}
+
+void XcsParser::endElement(xmlreader::XmlReader const & reader) {
+    if (valueParser_.endElement()) {
+        return;
+    }
+    if (ignoring_ > 0) {
+        --ignoring_;
+    } else if (!elements_.empty()) {
+        Element top(std::move(elements_.top()));
+        elements_.pop();
+        if (top.node.is()) {
+            if (elements_.empty()) {
+                switch (state_) {
+                case STATE_TEMPLATES:
+                    {
+                        auto itPair = data_.templates.insert({top.name, top.node});
+                        if (!itPair.second) {
+                            merge(itPair.first->second, top.node);
+                        }
+                    }
+                    break;
+                case STATE_COMPONENT:
+                    {
+                        NodeMap & components = data_.getComponents();
+                        auto itPair = components.insert({top.name, top.node});
+                        if (!itPair.second) {
+                            merge(itPair.first->second, top.node);
+                        }
+                        state_ = STATE_COMPONENT_DONE;
+                    }
+                    break;
+                default:
+                    assert(false);
+                    throw css::uno::RuntimeException(
+                        "this cannot happen");
+                }
+            } else {
+                if (!elements_.top().node->getMembers().insert(
+                        NodeMap::value_type(top.name, top.node)).second)
+                {
+                    throw css::uno::RuntimeException(
+                        "duplicate " + top.name + " in " + reader.getUrl());
+                }
+            }
+        }
+    } else {
+        switch (state_) {
+        case STATE_COMPONENT_SCHEMA:
+            // To support old, broken extensions with .xcs files that contain
+            // empty <component-schema> elements:
+            state_ = STATE_COMPONENT_DONE;
+            break;
+        case STATE_TEMPLATES:
+            state_ = STATE_TEMPLATES_DONE;
+            break;
+        case STATE_TEMPLATES_DONE:
+            throw css::uno::RuntimeException(
+                "no component element in " + reader.getUrl());
+        case STATE_COMPONENT_DONE:
+            break;
+        default:
+            assert(false); // this cannot happen
+        }
+    }
+}
+
+void XcsParser::characters(xmlreader::Span const & text) {
+    valueParser_.characters(text);
+}
+
+void XcsParser::handleComponentSchema(xmlreader::XmlReader & reader) {
+    //TODO: oor:version, xml:lang attributes
+    OStringBuffer buf(256);
+    buf.append('.');
+    bool hasPackage = false;
+    bool hasName = false;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "package")
+        {
+            if (hasPackage) {
+                throw css::uno::RuntimeException(
+                    "multiple component-schema package attributes in " +
+                    reader.getUrl());
+            }
+            hasPackage = true;
+            xmlreader::Span s(reader.getAttributeValue(false));
+            buf.insert(0, s.begin, s.length);
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "name")
+        {
+            if (hasName) {
+                throw css::uno::RuntimeException(
+                    "multiple component-schema name attributes in " +
+                    reader.getUrl());
+            }
+            hasName = true;
+            xmlreader::Span s(reader.getAttributeValue(false));
+            buf.append(s.begin, s.length);
+        }
+    }
+    if (!hasPackage) {
+        throw css::uno::RuntimeException(
+            "no component-schema package attribute in " + reader.getUrl());
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no component-schema name attribute in " + reader.getUrl());
+    }
+    componentName_ = xmlreader::Span(buf.getStr(), buf.getLength()).
+        convertFromUtf8();
+}
+
+void XcsParser::handleNodeRef(xmlreader::XmlReader & reader) {
+    bool hasName = false;
+    OUString name;
+    OUString component(componentName_);
+    bool hasNodeType = false;
+    OUString nodeType;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "component")
+        {
+            component = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "node-type")
+        {
+            hasNodeType = true;
+            nodeType = reader.getAttributeValue(false).convertFromUtf8();
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no node-ref name attribute in " + reader.getUrl());
+    }
+    rtl::Reference< Node > tmpl(
+        data_.getTemplate(
+            valueParser_.getLayer(),
+            xmldata::parseTemplateReference(
+                component, hasNodeType, nodeType, nullptr)));
+    if (!tmpl.is()) {
+        //TODO: this can erroneously happen as long as import/uses attributes
+        // are not correctly processed
+        throw css::uno::RuntimeException(
+            "unknown node-ref " + name + " in " + reader.getUrl());
+    }
+    rtl::Reference< Node > node(tmpl->clone(false));
+    node->setLayer(valueParser_.getLayer());
+    elements_.push(Element(node, name));
+}
+
+void XcsParser::handleProp(xmlreader::XmlReader & reader) {
+    bool hasName = false;
+    OUString name;
+    valueParser_.type_ = TYPE_ERROR;
+    bool localized = false;
+    bool nillable = true;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "type")
+        {
+            valueParser_.type_ = xmldata::parseType(
+                reader, reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "localized")
+        {
+            localized = xmldata::parseBoolean(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "nillable")
+        {
+            nillable = xmldata::parseBoolean(reader.getAttributeValue(true));
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no prop name attribute in " + reader.getUrl());
+    }
+    if (valueParser_.type_ == TYPE_ERROR) {
+        throw css::uno::RuntimeException(
+            "no prop type attribute in " + reader.getUrl());
+    }
+    elements_.push(
+        Element(
+            (localized
+             ? rtl::Reference< Node >(
+                 new LocalizedPropertyNode(
+                     valueParser_.getLayer(), valueParser_.type_, nillable))
+             : rtl::Reference< Node >(
+                 new PropertyNode(
+                     valueParser_.getLayer(), valueParser_.type_, nillable,
+                     css::uno::Any(), false))),
+            name));
+}
+
+void XcsParser::handlePropValue(
+    xmlreader::XmlReader & reader, rtl::Reference< Node > const & property)
+{
+    xmlreader::Span attrSeparator;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR &&
+            attrLn == "separator")
+        {
+            attrSeparator = reader.getAttributeValue(false);
+            if (attrSeparator.length == 0) {
+                throw css::uno::RuntimeException(
+                    "bad oor:separator attribute in " + reader.getUrl());
+            }
+        }
+    }
+    valueParser_.separator_ = OString(
+        attrSeparator.begin, attrSeparator.length);
+    valueParser_.start(property);
+}
+
+void XcsParser::handleGroup(xmlreader::XmlReader & reader, bool isTemplate) {
+    bool hasName = false;
+    OUString name;
+    bool extensible = false;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "extensible")
+        {
+            extensible = xmldata::parseBoolean(reader.getAttributeValue(true));
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no group name attribute in " + reader.getUrl());
+    }
+    if (isTemplate) {
+        name = Data::fullTemplateName(componentName_, name);
+    }
+    elements_.push(
+        Element(
+            new GroupNode(
+                valueParser_.getLayer(), extensible,
+                isTemplate ? name : OUString()),
+            name));
+}
+
+void XcsParser::handleSet(xmlreader::XmlReader & reader, bool isTemplate) {
+    bool hasName = false;
+    OUString name;
+    OUString component(componentName_);
+    bool hasNodeType = false;
+    OUString nodeType;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "component")
+        {
+            component = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "node-type")
+        {
+            hasNodeType = true;
+            nodeType = reader.getAttributeValue(false).convertFromUtf8();
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no set name attribute in " + reader.getUrl());
+    }
+    if (isTemplate) {
+        name = Data::fullTemplateName(componentName_, name);
+    }
+    elements_.push(
+        Element(
+            new SetNode(
+                valueParser_.getLayer(),
+                xmldata::parseTemplateReference(
+                    component, hasNodeType, nodeType, nullptr),
+                isTemplate ? name : OUString()),
+            name));
+}
+
+void XcsParser::handleSetItem(xmlreader::XmlReader & reader, SetNode * set) {
+    OUString component(componentName_);
+    bool hasNodeType = false;
+    OUString nodeType;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR &&
+            attrLn == "component")
+        {
+            component = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "node-type")
+        {
+            hasNodeType = true;
+            nodeType = reader.getAttributeValue(false).convertFromUtf8();
+        }
+    }
+    set->getAdditionalTemplateNames().push_back(
+        xmldata::parseTemplateReference(component, hasNodeType, nodeType, nullptr));
+    elements_.push(Element(rtl::Reference< Node >(), ""));
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xcsparser.hxx b/configmgr/source/xcsparser.hxx
new file mode 100644
index 000000000..f2c5c7742
--- /dev/null
+++ b/configmgr/source/xcsparser.hxx
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+#include <stack>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+#include <xmlreader/xmlreader.hxx>
+
+#include "node.hxx"
+#include "parser.hxx"
+#include "valueparser.hxx"
+
+namespace xmlreader { struct Span; }
+
+namespace configmgr {
+
+class SetNode;
+struct Data;
+
+class XcsParser: public Parser {
+public:
+    XcsParser(int layer, Data & data);
+
+private:
+    virtual ~XcsParser() override;
+
+    virtual xmlreader::XmlReader::Text getTextMode() override;
+
+    virtual bool startElement(
+        xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+        std::set< OUString > const * existingDependencies) override;
+
+    virtual void endElement(xmlreader::XmlReader const & reader) override;
+
+    virtual void characters(xmlreader::Span const & text) override;
+
+    void handleComponentSchema(xmlreader::XmlReader & reader);
+
+    void handleNodeRef(xmlreader::XmlReader & reader);
+
+    void handleProp(xmlreader::XmlReader & reader);
+
+    void handlePropValue(
+        xmlreader::XmlReader & reader, rtl::Reference< Node > const & property);
+
+    void handleGroup(xmlreader::XmlReader & reader, bool isTemplate);
+
+    void handleSet(xmlreader::XmlReader & reader, bool isTemplate);
+
+    void handleSetItem(xmlreader::XmlReader & reader, SetNode * set);
+
+    enum State {
+        STATE_START, STATE_COMPONENT_SCHEMA, STATE_TEMPLATES,
+        STATE_TEMPLATES_DONE, STATE_COMPONENT, STATE_COMPONENT_DONE };
+
+    struct Element {
+        rtl::Reference< Node > node;
+        OUString name;
+
+        Element(
+            rtl::Reference< Node > theNode,
+            OUString theName):
+            node(std::move(theNode)), name(std::move(theName)) {}
+    };
+
+    typedef std::stack< Element > ElementStack;
+
+    ValueParser valueParser_;
+    Data & data_;
+    OUString componentName_;
+    State state_;
+    long ignoring_;
+    ElementStack elements_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xcuparser.cxx b/configmgr/source/xcuparser.cxx
new file mode 100644
index 000000000..af21518ab
--- /dev/null
+++ b/configmgr/source/xcuparser.cxx
@@ -0,0 +1,968 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <cassert>
+#include <set>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/ref.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/string.hxx>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "data.hxx"
+#include "localizedpropertynode.hxx"
+#include "localizedvaluenode.hxx"
+#include "groupnode.hxx"
+#include "modifications.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "parsemanager.hxx"
+#include "partial.hxx"
+#include "propertynode.hxx"
+#include "setnode.hxx"
+#include "xcuparser.hxx"
+#include "xmldata.hxx"
+
+namespace configmgr {
+
+XcuParser::XcuParser(
+    int layer, Data & data, Partial const * partial,
+    Modifications * broadcastModifications, Additions * additions):
+    valueParser_(layer), data_(data),
+    partial_(partial), broadcastModifications_(broadcastModifications),
+    additions_(additions), recordModifications_(layer == Data::NO_LAYER),
+    trackPath_(
+        partial_ != nullptr || broadcastModifications_ != nullptr || additions_ != nullptr ||
+        recordModifications_)
+{}
+
+XcuParser::~XcuParser() {}
+
+xmlreader::XmlReader::Text XcuParser::getTextMode() {
+    return valueParser_.getTextMode();
+}
+
+bool XcuParser::startElement(
+    xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+    std::set< OUString > const * /*existingDependencies*/)
+{
+    if (valueParser_.startElement(reader, nsId, name)) {
+        return true;
+    }
+    if (state_.empty()) {
+        if (nsId == ParseManager::NAMESPACE_OOR &&
+            name == "component-data")
+        {
+            handleComponentData(reader);
+        } else if (nsId == ParseManager::NAMESPACE_OOR && name == "items")
+        {
+            state_.push(State::Modify(rtl::Reference< Node >()));
+        } else {
+            throw css::uno::RuntimeException(
+                "bad root element <" + name.convertFromUtf8() + "> in " +
+                reader.getUrl());
+        }
+    } else if (state_.top().ignore) {
+        state_.push(State::Ignore(false));
+    } else if (!state_.top().node.is()) {
+        if (nsId != xmlreader::XmlReader::NAMESPACE_NONE || name != "item")
+        {
+            throw css::uno::RuntimeException(
+                "bad items node member <" + name.convertFromUtf8() + "> in " +
+                reader.getUrl());
+        }
+        handleItem(reader);
+    } else {
+        switch (state_.top().node->kind()) {
+        case Node::KIND_PROPERTY:
+            if (nsId != xmlreader::XmlReader::NAMESPACE_NONE ||
+                name != "value")
+            {
+                throw css::uno::RuntimeException(
+                    "bad property node member <" + name.convertFromUtf8() +
+                    "> in " + reader.getUrl());
+            }
+            handlePropValue(
+                reader,
+                static_cast< PropertyNode * >(state_.top().node.get()));
+            break;
+        case Node::KIND_LOCALIZED_PROPERTY:
+            if (nsId != xmlreader::XmlReader::NAMESPACE_NONE ||
+                name != "value")
+            {
+                throw css::uno::RuntimeException(
+                    "bad localized property node member <" +
+                    name.convertFromUtf8() + "> in " + reader.getUrl());
+            }
+            handleLocpropValue(
+                reader,
+                static_cast< LocalizedPropertyNode * >(
+                    state_.top().node.get()));
+            break;
+        case Node::KIND_LOCALIZED_VALUE:
+            throw css::uno::RuntimeException(
+                "bad member <" + name.convertFromUtf8() + "> in " +
+                reader.getUrl());
+        case Node::KIND_GROUP:
+            if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                name == "prop")
+            {
+                handleGroupProp(
+                    reader,
+                    static_cast< GroupNode * >(state_.top().node.get()));
+            } else if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                       name == "node")
+            {
+                handleGroupNode(reader, state_.top().node);
+            } else {
+                throw css::uno::RuntimeException(
+                    "bad group node member <" + name.convertFromUtf8() +
+                    "> in " + reader.getUrl());
+            }
+            break;
+        case Node::KIND_SET:
+            if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                name == "node")
+            {
+                handleSetNode(
+                    reader, static_cast< SetNode * >(state_.top().node.get()));
+            } else if (nsId == xmlreader::XmlReader::NAMESPACE_NONE &&
+                       name == "prop")
+            {
+                SAL_WARN(
+                    "configmgr",
+                    "bad set node <prop> member in \"" << reader.getUrl()
+                        << '"');
+                state_.push(State::Ignore(false));
+            } else {
+                throw css::uno::RuntimeException(
+                    "bad set node member <" + name.convertFromUtf8() +
+                    "> in " + reader.getUrl());
+            }
+            break;
+        case Node::KIND_ROOT:
+            assert(false); // this cannot happen
+            break;
+        }
+    }
+    return true;
+}
+
+void XcuParser::endElement(xmlreader::XmlReader const &) {
+    if (valueParser_.endElement()) {
+        return;
+    }
+    assert(!state_.empty());
+    bool pop = state_.top().pop;
+    rtl::Reference< Node > insert;
+    OUString name;
+    if (state_.top().insert) {
+        insert = state_.top().node;
+        assert(insert.is());
+        name = state_.top().name;
+    }
+    state_.pop();
+    if (insert.is()) {
+        assert(!state_.empty() && state_.top().node.is());
+        state_.top().node->getMembers()[name] = insert;
+    }
+    if (pop && !path_.empty()) {
+        path_.pop_back();
+            // </item> will pop less than <item> pushed, but that is harmless,
+            // as the next <item> will reset path_
+    }
+}
+
+void XcuParser::characters(xmlreader::Span const & text) {
+    valueParser_.characters(text);
+}
+
+XcuParser::Operation XcuParser::parseOperation(xmlreader::Span const & text) {
+    assert(text.is());
+    if (text == "modify") {
+        return OPERATION_MODIFY;
+    }
+    if (text == "replace") {
+        return OPERATION_REPLACE;
+    }
+    if (text == "fuse") {
+        return OPERATION_FUSE;
+    }
+    if (text == "remove") {
+        return OPERATION_REMOVE;
+    }
+    throw css::uno::RuntimeException(
+        "invalid op " + text.convertFromUtf8());
+}
+
+void XcuParser::handleComponentData(xmlreader::XmlReader & reader) {
+    OStringBuffer buf(256);
+    buf.append('.');
+    bool hasPackage = false;
+    bool hasName = false;
+    Operation op = OPERATION_MODIFY;
+    bool finalized = false;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "package")
+        {
+            if (hasPackage) {
+                throw css::uno::RuntimeException(
+                    "multiple component-update package attributes in " +
+                    reader.getUrl());
+            }
+            hasPackage = true;
+            xmlreader::Span s(reader.getAttributeValue(false));
+            buf.insert(0, s.begin, s.length);
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "name")
+        {
+            if (hasName) {
+                throw css::uno::RuntimeException(
+                    "multiple component-update name attributes in " +
+                    reader.getUrl());
+            }
+            hasName = true;
+            xmlreader::Span s(reader.getAttributeValue(false));
+            buf.append(s.begin, s.length);
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "op")
+        {
+            op = parseOperation(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "finalized")
+        {
+            finalized = xmldata::parseBoolean(reader.getAttributeValue(true));
+        }
+    }
+    if (!hasPackage) {
+        throw css::uno::RuntimeException(
+            "no component-data package attribute in " + reader.getUrl());
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no component-data name attribute in " + reader.getUrl());
+    }
+    componentName_ = xmlreader::Span(buf.getStr(), buf.getLength()).
+        convertFromUtf8();
+    if (trackPath_) {
+        assert(path_.empty());
+        path_.push_back(componentName_);
+        if (partial_ != nullptr && partial_->contains(path_) == Partial::CONTAINS_NOT)
+        {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    }
+    rtl::Reference< Node > node(
+        data_.getComponents().findNode(valueParser_.getLayer(),
+                                       componentName_));
+    if (!node.is()) {
+        SAL_WARN(
+            "configmgr",
+            "unknown component \"" << componentName_ << "\" in \""
+                << reader.getUrl() << '"');
+        state_.push(State::Ignore(true));
+        return;
+    }
+    switch (op) {
+    case OPERATION_MODIFY:
+    case OPERATION_FUSE:
+        break;
+    default:
+        throw css::uno::RuntimeException(
+            "invalid operation on root node in " + reader.getUrl());
+    }
+    int finalizedLayer = std::min(
+        finalized ? valueParser_.getLayer() : Data::NO_LAYER,
+        node->getFinalized());
+    node->setFinalized(finalizedLayer);
+    if (finalizedLayer < valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    state_.push(State::Modify(node));
+}
+
+void XcuParser::handleItem(xmlreader::XmlReader & reader) {
+    xmlreader::Span attrPath;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "path") {
+            attrPath = reader.getAttributeValue(false);
+        }
+    }
+    if (!attrPath.is()) {
+        throw css::uno::RuntimeException(
+            "missing path attribute in " + reader.getUrl());
+    }
+    OUString path(attrPath.convertFromUtf8());
+    int finalizedLayer;
+    rtl::Reference< Node > node(
+        data_.resolvePathRepresentation(
+            path, nullptr, &path_, &finalizedLayer));
+    if (!node.is()) {
+        SAL_WARN(
+            "configmgr",
+            "unknown item \"" << path << "\" in \"" << reader.getUrl() << '"');
+        state_.push(State::Ignore(true));
+        return;
+    }
+    assert(!path_.empty());
+    componentName_ = path_.front();
+    if (trackPath_) {
+        if (partial_ != nullptr && partial_->contains(path_) == Partial::CONTAINS_NOT)
+        {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    } else {
+        path_.clear();
+    }
+    switch (node->kind()) {
+    case Node::KIND_PROPERTY:
+    case Node::KIND_LOCALIZED_VALUE:
+        SAL_WARN(
+            "configmgr",
+            "item of bad type \"" << path << "\" in \"" << reader.getUrl()
+                << '"');
+        state_.push(State::Ignore(true));
+        return;
+    case Node::KIND_LOCALIZED_PROPERTY:
+        valueParser_.type_ = static_cast< LocalizedPropertyNode * >(
+            node.get())->getStaticType();
+        break;
+    default:
+        break;
+    }
+    if (finalizedLayer < valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    state_.push(State::Modify(node));
+}
+
+void XcuParser::handlePropValue(
+    xmlreader::XmlReader & reader, PropertyNode * prop)
+ {
+    bool nil = false;
+    OString separator;
+    OUString external;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_XSI && attrLn == "nil") {
+            nil = xmldata::parseBoolean(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "type")
+        {
+            Type type = xmldata::parseType(
+                reader, reader.getAttributeValue(true));
+            if (valueParser_.type_ != TYPE_ANY && type != valueParser_.type_) {
+                throw css::uno::RuntimeException(
+                    "invalid value type in " + reader.getUrl());
+            }
+            valueParser_.type_ = type;
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "separator")
+        {
+            xmlreader::Span s(reader.getAttributeValue(false));
+            if (s.length == 0) {
+                throw css::uno::RuntimeException(
+                    "bad oor:separator attribute in " + reader.getUrl());
+            }
+            separator = OString(s.begin, s.length);
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "external")
+        {
+            external = reader.getAttributeValue(true).convertFromUtf8();
+            if (external.isEmpty()) {
+                throw css::uno::RuntimeException(
+                    "bad oor:external attribute value in " + reader.getUrl());
+            }
+        }
+    }
+    if (nil) {
+        if (!prop->isNillable()) {
+            throw css::uno::RuntimeException(
+                "xsi:nil attribute for non-nillable prop in " + reader.getUrl());
+        }
+        if (!external.isEmpty()) {
+            throw css::uno::RuntimeException(
+                "xsi:nil and oor:external attributes for prop in " +
+                reader.getUrl());
+        }
+        prop->setValue(valueParser_.getLayer(), css::uno::Any());
+        state_.push(State::Ignore(false));
+    } else if (external.isEmpty()) {
+        valueParser_.separator_ = separator;
+        valueParser_.start(prop);
+    } else {
+        prop->setExternal(valueParser_.getLayer(), external);
+        state_.push(State::Ignore(false));
+    }
+}
+
+void XcuParser::handleLocpropValue(
+    xmlreader::XmlReader & reader, LocalizedPropertyNode * locprop)
+{
+    OUString name;
+    bool nil = false;
+    OString separator;
+    Operation op = OPERATION_FUSE;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == xmlreader::XmlReader::NAMESPACE_XML &&
+            attrLn == "lang")
+        {
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_XSI &&
+                   attrLn == "nil")
+        {
+            nil = xmldata::parseBoolean(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "type")
+        {
+            Type type = xmldata::parseType(
+                reader, reader.getAttributeValue(true));
+            if (valueParser_.type_ != TYPE_ANY && type != valueParser_.type_) {
+                throw css::uno::RuntimeException(
+                    "invalid value type in " + reader.getUrl());
+            }
+            valueParser_.type_ = type;
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "separator")
+        {
+            xmlreader::Span s(reader.getAttributeValue(false));
+            if (s.length == 0) {
+                throw css::uno::RuntimeException(
+                    "bad oor:separator attribute in " + reader.getUrl());
+            }
+            separator = OString(s.begin, s.length);
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "op")
+        {
+            op = parseOperation(reader.getAttributeValue(true));
+        }
+    }
+    if (trackPath_) {
+        path_.push_back(name);
+        if (partial_ != nullptr &&
+            partial_->contains(path_) != Partial::CONTAINS_NODE)
+        {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    }
+    NodeMap & members = locprop->getMembers();
+    NodeMap::iterator i(members.find(name));
+    if (i != members.end() && i->second->getLayer() > valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    if (nil && !locprop->isNillable()) {
+        throw css::uno::RuntimeException(
+            "xsi:nil attribute for non-nillable prop in " + reader.getUrl());
+    }
+    switch (op) {
+    case OPERATION_FUSE:
+        {
+            bool pop = false;
+            if (nil) {
+                if (i == members.end()) {
+                    members[name] = new LocalizedValueNode(
+                        valueParser_.getLayer(), css::uno::Any());
+                } else {
+                    static_cast< LocalizedValueNode * >(
+                        i->second.get())->setValue(
+                            valueParser_.getLayer(), css::uno::Any());
+                }
+                state_.push(State::Ignore(true));
+            } else {
+                valueParser_.separator_ = separator;
+                valueParser_.start(locprop, name);
+                pop = true;
+            }
+            if (trackPath_) {
+                recordModification(false);
+                if (pop) {
+                    path_.pop_back();
+                }
+            }
+        }
+        break;
+    case OPERATION_REMOVE:
+        //TODO: only allow if parent.op == OPERATION_FUSE
+        //TODO: disallow removing when e.g. lang=""?
+        if (i != members.end()) {
+            members.erase(i);
+        }
+        state_.push(State::Ignore(true));
+        recordModification(false);
+        break;
+    default:
+        throw css::uno::RuntimeException(
+            "bad op attribute for value element in " + reader.getUrl());
+    }
+}
+
+void XcuParser::handleGroupProp(
+    xmlreader::XmlReader & reader, GroupNode * group)
+{
+    bool hasName = false;
+    OUString name;
+    Type type = TYPE_ERROR;
+    Operation op = OPERATION_MODIFY;
+    bool finalized = false;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "type")
+        {
+            type = xmldata::parseType(reader, reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "op")
+        {
+            op = parseOperation(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "finalized")
+        {
+            finalized = xmldata::parseBoolean(reader.getAttributeValue(true));
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no prop name attribute in " + reader.getUrl());
+    }
+    if (trackPath_) {
+        path_.push_back(name);
+        //TODO: This ignores locprop values for which specific include paths
+        // exist (i.e., for which contains(locprop path) = CONTAINS_SUBNODES):
+        if (partial_ != nullptr &&
+            partial_->contains(path_) != Partial::CONTAINS_NODE)
+        {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    }
+    NodeMap & members = group->getMembers();
+    NodeMap::iterator i(members.find(name));
+    if (i == members.end()) {
+        handleUnknownGroupProp(reader, group, name, type, op, finalized);
+    } else {
+        switch (i->second->kind()) {
+        case Node::KIND_PROPERTY:
+            handlePlainGroupProp(reader, group, i, name, type, op, finalized);
+            break;
+        case Node::KIND_LOCALIZED_PROPERTY:
+            handleLocalizedGroupProp(
+                reader,
+                static_cast< LocalizedPropertyNode * >(i->second.get()), name,
+                type, op, finalized);
+            break;
+        default:
+            throw css::uno::RuntimeException(
+                "inappropriate prop " + name + " in " + reader.getUrl());
+        }
+    }
+}
+
+void XcuParser::handleUnknownGroupProp(
+    xmlreader::XmlReader const & reader, GroupNode const * group,
+    OUString const & name, Type type, Operation operation, bool finalized)
+{
+    switch (operation) {
+    case OPERATION_REPLACE:
+    case OPERATION_FUSE:
+        if (group->isExtensible()) {
+            if (type == TYPE_ERROR) {
+                throw css::uno::RuntimeException(
+                    "missing type attribute for prop " + name + " in " +
+                    reader.getUrl());
+            }
+            valueParser_.type_ = type;
+            rtl::Reference< Node > prop(
+                new PropertyNode(
+                    valueParser_.getLayer(), TYPE_ANY, true, css::uno::Any(),
+                    true));
+            if (finalized) {
+                prop->setFinalized(valueParser_.getLayer());
+            }
+            state_.push(State::Insert(prop, name));
+            recordModification(false);
+            break;
+        }
+        [[fallthrough]];
+    default:
+        SAL_WARN(
+            "configmgr",
+            "unknown property \"" << name << "\" in \"" << reader.getUrl()
+                << '"');
+        state_.push(State::Ignore(true));
+        break;
+    }
+}
+
+void XcuParser::handlePlainGroupProp(
+    xmlreader::XmlReader const & reader, GroupNode * group,
+    NodeMap::iterator const & propertyIndex, std::u16string_view name,
+    Type type, Operation operation, bool finalized)
+{
+    PropertyNode * property = static_cast< PropertyNode * >(
+        propertyIndex->second.get());
+    if (property->getLayer() > valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    int finalizedLayer = std::min(
+        finalized ? valueParser_.getLayer() : Data::NO_LAYER,
+        property->getFinalized());
+    property->setFinalized(finalizedLayer);
+    if (finalizedLayer < valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    if (type != TYPE_ERROR && property->getStaticType() != TYPE_ANY &&
+        type != property->getStaticType())
+    {
+        throw css::uno::RuntimeException(
+            OUString::Concat("invalid type for prop ") + name + " in " + reader.getUrl());
+    }
+    valueParser_.type_ = type == TYPE_ERROR ? property->getStaticType() : type;
+    switch (operation) {
+    case OPERATION_MODIFY:
+    case OPERATION_REPLACE:
+    case OPERATION_FUSE:
+        state_.push(State::Modify(property));
+        recordModification(false);
+        break;
+    case OPERATION_REMOVE:
+        if (!property->isExtension()) {
+            throw css::uno::RuntimeException(
+                OUString::Concat("invalid remove of non-extension prop ") + name + " in " +
+                reader.getUrl());
+        }
+        group->getMembers().erase(propertyIndex);
+        state_.push(State::Ignore(true));
+        recordModification(false);
+        break;
+    }
+}
+
+void XcuParser::handleLocalizedGroupProp(
+    xmlreader::XmlReader const & reader, LocalizedPropertyNode * property,
+    OUString const & name, Type type, Operation operation, bool finalized)
+{
+    if (property->getLayer() > valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    int finalizedLayer = std::min(
+        finalized ? valueParser_.getLayer() : Data::NO_LAYER,
+        property->getFinalized());
+    property->setFinalized(finalizedLayer);
+    if (finalizedLayer < valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    if (type != TYPE_ERROR && property->getStaticType() != TYPE_ANY &&
+        type != property->getStaticType())
+    {
+        throw css::uno::RuntimeException(
+            "invalid type for prop " + name + " in " + reader.getUrl());
+    }
+    valueParser_.type_ = type == TYPE_ERROR ? property->getStaticType() : type;
+    switch (operation) {
+    case OPERATION_MODIFY:
+    case OPERATION_FUSE:
+        state_.push(State::Modify(property));
+        break;
+    case OPERATION_REPLACE:
+        {
+            rtl::Reference< Node > replacement(
+                new LocalizedPropertyNode(
+                    valueParser_.getLayer(), property->getStaticType(),
+                    property->isNillable()));
+            replacement->setFinalized(property->getFinalized());
+            state_.push(State::Insert(replacement, name));
+            recordModification(false);
+        }
+        break;
+    case OPERATION_REMOVE:
+        throw css::uno::RuntimeException(
+            "invalid remove of non-extension prop " + name + " in " +
+            reader.getUrl());
+    }
+}
+
+void XcuParser::handleGroupNode(
+    xmlreader::XmlReader & reader, rtl::Reference< Node > const & group)
+{
+    bool hasName = false;
+    OUString name;
+    Operation op = OPERATION_MODIFY;
+    bool finalized = false;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "op")
+        {
+            op = parseOperation(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "finalized")
+        {
+            finalized = xmldata::parseBoolean(reader.getAttributeValue(true));
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no node name attribute in " + reader.getUrl());
+    }
+    if (trackPath_) {
+        path_.push_back(name);
+        if (partial_ != nullptr && partial_->contains(path_) == Partial::CONTAINS_NOT)
+        {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    }
+    rtl::Reference< Node > child(
+        group->getMembers().findNode(valueParser_.getLayer(), name));
+    if (!child.is()) {
+        SAL_WARN(
+            "configmgr",
+            "unknown node \"" << name << "\" in \"" << reader.getUrl() << '"');
+        state_.push(State::Ignore(true));
+        return;
+    }
+    Node::Kind kind = child->kind();
+    if (kind != Node::KIND_GROUP && kind != Node::KIND_SET) {
+        throw css::uno::RuntimeException(
+            "bad <node> \"" + name + "\" of non group/set kind in " +
+            reader.getUrl());
+    }
+    if (op != OPERATION_MODIFY && op != OPERATION_FUSE) {
+        throw css::uno::RuntimeException(
+            "invalid operation on group node in " + reader.getUrl());
+    }
+    int finalizedLayer = std::min(
+        finalized ? valueParser_.getLayer() : Data::NO_LAYER,
+        child->getFinalized());
+    child->setFinalized(finalizedLayer);
+    if (finalizedLayer < valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    state_.push(State::Modify(child));
+}
+
+void XcuParser::handleSetNode(xmlreader::XmlReader & reader, SetNode * set) {
+    bool hasName = false;
+    OUString name;
+    OUString component(componentName_);
+    bool hasNodeType = false;
+    OUString nodeType;
+    Operation op = OPERATION_MODIFY;
+    bool finalized = false;
+    bool mandatory = false;
+    for (;;) {
+        int attrNsId;
+        xmlreader::Span attrLn;
+        if (!reader.nextAttribute(&attrNsId, &attrLn)) {
+            break;
+        }
+        if (attrNsId == ParseManager::NAMESPACE_OOR && attrLn == "name") {
+            hasName = true;
+            name = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "component")
+        {
+            component = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "node-type")
+        {
+            hasNodeType = true;
+            nodeType = reader.getAttributeValue(false).convertFromUtf8();
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "op")
+        {
+            op = parseOperation(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "finalized")
+        {
+            finalized = xmldata::parseBoolean(reader.getAttributeValue(true));
+        } else if (attrNsId == ParseManager::NAMESPACE_OOR &&
+                   attrLn == "mandatory")
+        {
+            mandatory = xmldata::parseBoolean(reader.getAttributeValue(true));
+        }
+    }
+    if (!hasName) {
+        throw css::uno::RuntimeException(
+            "no node name attribute in " + reader.getUrl());
+    }
+    if (trackPath_) {
+        path_.push_back(name);
+        if (partial_ != nullptr && partial_->contains(path_) == Partial::CONTAINS_NOT)
+        {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    }
+    OUString templateName(
+        xmldata::parseTemplateReference(
+            component, hasNodeType, nodeType, &set->getDefaultTemplateName()));
+    if (!set->isValidTemplate(templateName)) {
+        throw css::uno::RuntimeException(
+            "set member node " + name + " references invalid template " +
+            templateName + " in " + reader.getUrl());
+    }
+    rtl::Reference< Node > tmpl(
+        data_.getTemplate(valueParser_.getLayer(), templateName));
+    if (!tmpl.is()) {
+        throw css::uno::RuntimeException(
+            "set member node " + name + " references undefined template " +
+            templateName + " in " + reader.getUrl());
+    }
+    int finalizedLayer = finalized ? valueParser_.getLayer() : Data::NO_LAYER;
+    int mandatoryLayer = mandatory ? valueParser_.getLayer() : Data::NO_LAYER;
+    NodeMap & members = set->getMembers();
+    NodeMap::iterator i(members.find(name));
+    if (i != members.end()) {
+        finalizedLayer = std::min(finalizedLayer, i->second->getFinalized());
+        i->second->setFinalized(finalizedLayer);
+        mandatoryLayer = std::min(mandatoryLayer, i->second->getMandatory());
+        i->second->setMandatory(mandatoryLayer);
+        if (i->second->getLayer() > valueParser_.getLayer()) {
+            state_.push(State::Ignore(true));
+            return;
+        }
+    }
+    if (finalizedLayer < valueParser_.getLayer()) {
+        state_.push(State::Ignore(true));
+        return;
+    }
+    switch (op) {
+    case OPERATION_MODIFY:
+        if (i == members.end()) {
+            SAL_WARN(
+                "configmgr",
+                "ignoring modify of unknown set member node \"" << name
+                    << "\" in \"" << reader.getUrl() << '"');
+            state_.push(State::Ignore(true));
+        } else {
+            state_.push(State::Modify(i->second));
+        }
+        break;
+    case OPERATION_REPLACE:
+        {
+            rtl::Reference< Node > member(tmpl->clone(true));
+            member->setLayer(valueParser_.getLayer());
+            member->setFinalized(finalizedLayer);
+            member->setMandatory(mandatoryLayer);
+            state_.push(State::Insert(member, name));
+            recordModification(i == members.end());
+        }
+        break;
+    case OPERATION_FUSE:
+        if (i == members.end()) {
+            rtl::Reference< Node > member(tmpl->clone(true));
+            member->setLayer(valueParser_.getLayer());
+            member->setFinalized(finalizedLayer);
+            member->setMandatory(mandatoryLayer);
+            state_.push(State::Insert(member, name));
+            recordModification(true);
+        } else {
+            state_.push(State::Modify(i->second));
+        }
+        break;
+    case OPERATION_REMOVE:
+        {
+            // Ignore removal of unknown members and members made mandatory in
+            // this or a lower layer; forget about user-layer removals that no
+            // longer remove anything (so that paired additions/removals in the
+            // user layer do not grow registrymodifications.xcu unbounded):
+            bool known = i != members.end();
+            if (known &&
+                (mandatoryLayer == Data::NO_LAYER ||
+                 mandatoryLayer > valueParser_.getLayer()))
+            {
+                members.erase(i);
+            }
+            state_.push(State::Ignore(true));
+            if (known) {
+                recordModification(false);
+            }
+            break;
+        }
+    }
+}
+
+void XcuParser::recordModification(bool addition) {
+    if (broadcastModifications_ != nullptr) {
+        broadcastModifications_->add(path_);
+    }
+    if (addition && additions_ != nullptr) {
+        additions_->push_back(path_);
+    }
+    if (recordModifications_) {
+        data_.modifications.add(path_);
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xcuparser.hxx b/configmgr/source/xcuparser.hxx
new file mode 100644
index 000000000..e50b7b5a0
--- /dev/null
+++ b/configmgr/source/xcuparser.hxx
@@ -0,0 +1,152 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <set>
+#include <stack>
+#include <string_view>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <utility>
+#include <xmlreader/xmlreader.hxx>
+
+#include "additions.hxx"
+#include "node.hxx"
+#include "nodemap.hxx"
+#include "parser.hxx"
+#include "type.hxx"
+#include "valueparser.hxx"
+
+namespace xmlreader { struct Span; }
+
+namespace configmgr {
+
+class GroupNode;
+class LocalizedPropertyNode;
+class Modifications;
+class Partial;
+class PropertyNode;
+class SetNode;
+struct Data;
+
+class XcuParser: public Parser {
+public:
+    XcuParser(
+        int layer, Data & data, Partial const * partial,
+        Modifications * broadcastModifications, Additions * additions);
+
+private:
+    virtual ~XcuParser() override;
+
+    virtual xmlreader::XmlReader::Text getTextMode() override;
+
+    virtual bool startElement(
+        xmlreader::XmlReader & reader, int nsId, xmlreader::Span const & name,
+        std::set< OUString > const * existingDependencies) override;
+
+    virtual void endElement(xmlreader::XmlReader const & reader) override;
+
+    virtual void characters(xmlreader::Span const & span) override;
+
+    enum Operation {
+        OPERATION_MODIFY, OPERATION_REPLACE, OPERATION_FUSE, OPERATION_REMOVE };
+
+    static Operation parseOperation(xmlreader::Span const & text);
+
+    void handleComponentData(xmlreader::XmlReader & reader);
+
+    void handleItem(xmlreader::XmlReader & reader);
+
+    void handlePropValue(xmlreader::XmlReader & reader, PropertyNode * prop);
+
+    void handleLocpropValue(
+        xmlreader::XmlReader & reader, LocalizedPropertyNode * locprop);
+
+    void handleGroupProp(xmlreader::XmlReader & reader, GroupNode * group);
+
+    void handleUnknownGroupProp(
+        xmlreader::XmlReader const & reader, GroupNode const * group,
+        OUString const & name, Type type, Operation operation,
+        bool finalized);
+
+    void handlePlainGroupProp(
+        xmlreader::XmlReader const & reader, GroupNode * group,
+        NodeMap::iterator const & propertyIndex, std::u16string_view name,
+        Type type, Operation operation, bool finalized);
+
+    void handleLocalizedGroupProp(
+        xmlreader::XmlReader const & reader, LocalizedPropertyNode * property,
+        OUString const & name, Type type, Operation operation,
+        bool finalized);
+
+    void handleGroupNode(
+        xmlreader::XmlReader & reader, rtl::Reference< Node > const & group);
+
+    void handleSetNode(xmlreader::XmlReader & reader, SetNode * set);
+
+    void recordModification(bool addition);
+
+    struct State {
+        rtl::Reference< Node > node; // empty if ignore or <items>
+        OUString name; // empty and ignored if !insert
+        bool ignore;
+        bool insert;
+        bool pop;
+
+        static State Ignore(bool thePop) { return State(thePop); }
+
+        static State Modify(rtl::Reference< Node > const & theNode)
+        { return State(theNode); }
+
+        static State Insert(
+            rtl::Reference< Node > const & theNode, OUString const & theName)
+        { return State(theNode, theName); }
+
+    private:
+        explicit State(bool thePop): ignore(true), insert(false), pop(thePop) {}
+
+        explicit State(rtl::Reference< Node > theNode):
+            node(std::move(theNode)), ignore(false), insert(false), pop(true)
+        {}
+
+        State(
+            rtl::Reference< Node > theNode, OUString theName):
+            node(std::move(theNode)), name(std::move(theName)), ignore(false), insert(true), pop(true)
+        {}
+    };
+
+    ValueParser valueParser_;
+    Data & data_;
+    Partial const * partial_;
+    Modifications * broadcastModifications_;
+    Additions * additions_;
+    bool recordModifications_;
+    bool trackPath_;
+    OUString componentName_;
+    std::stack< State > state_;
+    std::vector<OUString> path_;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xmldata.cxx b/configmgr/source/xmldata.cxx
new file mode 100644
index 000000000..ecb4dacab
--- /dev/null
+++ b/configmgr/source/xmldata.cxx
@@ -0,0 +1,133 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <rtl/string.h>
+#include <rtl/ustring.hxx>
+#include <sal/types.h>
+#include <xmlreader/span.hxx>
+#include <xmlreader/xmlreader.hxx>
+
+#include "data.hxx"
+#include "parsemanager.hxx"
+#include "type.hxx"
+#include "xmldata.hxx"
+
+namespace configmgr::xmldata {
+
+Type parseType(
+    xmlreader::XmlReader const & reader, xmlreader::Span const & text)
+{
+    assert(text.is());
+    sal_Int32 i = rtl_str_indexOfChar_WithLength(text.begin, text.length, ':');
+    if (i >= 0) {
+        xmlreader::Span token(text.begin + i + 1, text.length - (i + 1));
+        switch (reader.getNamespaceId(xmlreader::Span(text.begin, i))) {
+        case ParseManager::NAMESPACE_OOR:
+            if (token == "any")
+            {
+                return TYPE_ANY;
+            } else if (token == "boolean-list")
+            {
+                return TYPE_BOOLEAN_LIST;
+            } else if (token == "short-list")
+            {
+                return TYPE_SHORT_LIST;
+            } else if (token == "int-list")
+            {
+                return TYPE_INT_LIST;
+            } else if (token == "long-list")
+            {
+                return TYPE_LONG_LIST;
+            } else if (token == "double-list")
+            {
+                return TYPE_DOUBLE_LIST;
+            } else if (token == "string-list")
+            {
+                return TYPE_STRING_LIST;
+            } else if (token == "hexBinary-list")
+            {
+                return TYPE_HEXBINARY_LIST;
+            }
+            break;
+        case ParseManager::NAMESPACE_XS:
+            if (token == "boolean")
+            {
+                return TYPE_BOOLEAN;
+            } else if (token =="short")
+            {
+                return TYPE_SHORT;
+            } else if (token =="int")
+            {
+                return TYPE_INT;
+            } else if (token =="long")
+            {
+                return TYPE_LONG;
+            } else if (token =="double")
+            {
+                return TYPE_DOUBLE;
+            } else if (token =="string")
+            {
+                return TYPE_STRING;
+            } else if (token =="hexBinary")
+            {
+                return TYPE_HEXBINARY;
+            }
+            break;
+        default:
+            break;
+        }
+    }
+    throw css::uno::RuntimeException(
+        "invalid type " + text.convertFromUtf8());
+}
+
+bool parseBoolean(xmlreader::Span const & text) {
+    assert(text.is());
+    if (text == "true") {
+        return true;
+    }
+    if (text == "false") {
+        return false;
+    }
+    throw css::uno::RuntimeException(
+        "invalid boolean " + text.convertFromUtf8());
+}
+
+OUString parseTemplateReference(
+    std::u16string_view component, bool hasNodeType,
+    std::u16string_view nodeType, OUString const * defaultTemplateName)
+{
+    if (!hasNodeType) {
+        if (defaultTemplateName != nullptr) {
+            return *defaultTemplateName;
+        }
+        throw css::uno::RuntimeException(
+            "missing node-type attribute");
+    }
+    return Data::fullTemplateName(component, nodeType);
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/configmgr/source/xmldata.hxx b/configmgr/source/xmldata.hxx
new file mode 100644
index 000000000..44296b38d
--- /dev/null
+++ b/configmgr/source/xmldata.hxx
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <rtl/ustring.hxx>
+
+#include "type.hxx"
+
+namespace xmlreader {
+    class XmlReader;
+    struct Span;
+}
+
+namespace configmgr::xmldata {
+
+Type parseType(
+    xmlreader::XmlReader const & reader, xmlreader::Span const & text);
+
+bool parseBoolean(xmlreader::Span const & text);
+
+OUString parseTemplateReference(
+    std::u16string_view component, bool hasNodeType,
+    std::u16string_view nodeType, OUString const * defaultTemplateName);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */