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

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

32 files changed, 9153 insertions, 0 deletions

diff --git a/ucbhelper/IwyuFilter_ucbhelper.yaml b/ucbhelper/IwyuFilter_ucbhelper.yaml
new file mode 100644
index 000000000..5193d909b
--- /dev/null
+++ b/ucbhelper/IwyuFilter_ucbhelper.yaml
@@ -0,0 +1,23 @@
+---
+assumeFilename: ucbhelper/source/provider/resultset.cxx
+excludelist:
+    ucbhelper/source/client/content.cxx:
+    # Needed for direct member access
+    - com/sun/star/ucb/XCommandInfo.hpp
+    - com/sun/star/beans/XPropertySetInfo.hpp
+    ucbhelper/source/provider/cancelcommandexecution.cxx:
+    # Needed for linker visibility
+    - ucbhelper/cancelcommandexecution.hxx
+    ucbhelper/source/provider/resultsetmetadata.cxx:
+    # Needed for UnoType types
+    - com/sun/star/io/XInputStream.hpp
+    - com/sun/star/sdbc/XArray.hpp
+    - com/sun/star/sdbc/XBlob.hpp
+    - com/sun/star/sdbc/XClob.hpp
+    - com/sun/star/sdbc/XRef.hpp
+    - com/sun/star/util/Date.hpp
+    - com/sun/star/util/Time.hpp
+    - com/sun/star/util/DateTime.hpp
+    ucbhelper/source/provider/simpleioerrorrequest.cxx:
+    # Actually used
+    - com/sun/star/ucb/XCommandProcessor.hpp
diff --git a/ucbhelper/Library_ucbhelper.mk b/ucbhelper/Library_ucbhelper.mk
new file mode 100644
index 000000000..5b6285d35
--- /dev/null
+++ b/ucbhelper/Library_ucbhelper.mk
@@ -0,0 +1,57 @@
+# -*- 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 $(call gb_Library_Library,ucbhelper))
+
+$(eval $(call gb_Library_use_sdk_api,ucbhelper))
+
+$(eval $(call gb_Library_use_libraries,ucbhelper,\
+    cppu \
+    cppuhelper \
+    sal \
+    salhelper \
+))
+
+$(eval $(call gb_Library_add_defs,ucbhelper,\
+    -DUCBHELPER_DLLIMPLEMENTATION \
+))
+
+$(eval $(call gb_Library_add_exception_objects,ucbhelper,\
+    ucbhelper/source/client/activedatasink \
+    ucbhelper/source/client/activedatastreamer \
+    ucbhelper/source/client/commandenvironment \
+    ucbhelper/source/client/content \
+    ucbhelper/source/client/interceptedinteraction \
+    ucbhelper/source/client/proxydecider \
+	ucbhelper/source/provider/authenticationfallback \
+    ucbhelper/source/provider/cancelcommandexecution \
+    ucbhelper/source/provider/contenthelper \
+    ucbhelper/source/provider/contentidentifier \
+    ucbhelper/source/provider/contentinfo \
+    ucbhelper/source/provider/fd_inputstream \
+    ucbhelper/source/provider/interactionrequest \
+    ucbhelper/source/provider/propertyvalueset \
+    ucbhelper/source/provider/providerhelper \
+    ucbhelper/source/provider/registerucb \
+    ucbhelper/source/provider/resultset \
+    ucbhelper/source/provider/resultsethelper \
+    ucbhelper/source/provider/resultsetmetadata \
+    ucbhelper/source/provider/simpleauthenticationrequest \
+    ucbhelper/source/provider/simplecertificatevalidationrequest \
+    ucbhelper/source/provider/simpleinteractionrequest \
+    ucbhelper/source/provider/simpleioerrorrequest \
+    ucbhelper/source/provider/simplenameclashresolverequest \
+))
+
+$(eval $(call gb_Library_use_system_win32_libs,ucbhelper,\
+    Winhttp \
+))
+
+# vim: set noet sw=4 ts=4:
+
diff --git a/ucbhelper/Makefile b/ucbhelper/Makefile
new file mode 100644
index 000000000..ccb1c85a0
--- /dev/null
+++ b/ucbhelper/Makefile
@@ -0,0 +1,7 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+
+module_directory:=$(dir $(realpath $(firstword $(MAKEFILE_LIST))))
+
+include $(module_directory)/../solenv/gbuild/partial_build.mk
+
+# vim: set noet sw=4 ts=4:
diff --git a/ucbhelper/Module_ucbhelper.mk b/ucbhelper/Module_ucbhelper.mk
new file mode 100644
index 000000000..5f667c36d
--- /dev/null
+++ b/ucbhelper/Module_ucbhelper.mk
@@ -0,0 +1,16 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+$(eval $(call gb_Module_Module,ucbhelper))
+
+$(eval $(call gb_Module_add_targets,ucbhelper,\
+	Library_ucbhelper \
+))
+
+# vim: set noet sw=4 ts=4:
diff --git a/ucbhelper/README.md b/ucbhelper/README.md
new file mode 100644
index 000000000..86ecaf866
--- /dev/null
+++ b/ucbhelper/README.md
@@ -0,0 +1,3 @@
+# C++ Wrappers for UCB
+
+C++ wrappers to help make using content providers easy.
diff --git a/ucbhelper/source/client/activedatasink.cxx b/ucbhelper/source/client/activedatasink.cxx
new file mode 100644
index 000000000..fdbcbdccb
--- /dev/null
+++ b/ucbhelper/source/client/activedatasink.cxx
@@ -0,0 +1,45 @@
+/* -*- 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 .
+ */
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include <ucbhelper/activedatasink.hxx>
+
+using namespace com::sun::star;
+
+namespace ucbhelper
+{
+// ActiveDataSink Implementation.
+// XActiveDataSink methods.
+
+// virtual
+void SAL_CALL ActiveDataSink::setInputStream(const uno::Reference<io::XInputStream>& aStream)
+{
+    m_xStream = aStream;
+}
+
+// virtual
+uno::Reference<io::XInputStream> SAL_CALL ActiveDataSink::getInputStream() { return m_xStream; }
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/client/activedatastreamer.cxx b/ucbhelper/source/client/activedatastreamer.cxx
new file mode 100644
index 000000000..8438cae49
--- /dev/null
+++ b/ucbhelper/source/client/activedatastreamer.cxx
@@ -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 .
+ */
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include "activedatastreamer.hxx"
+
+using namespace com::sun::star;
+
+namespace ucbhelper
+{
+// ActiveDataStreamer Implementation.
+
+// XActiveDataStreamer methods.
+
+// virtual
+void SAL_CALL ActiveDataStreamer::setStream(const uno::Reference<io::XStream>& xStream)
+{
+    m_xStream = xStream;
+}
+
+// virtual
+uno::Reference<io::XStream> SAL_CALL ActiveDataStreamer::getStream() { return m_xStream; }
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/client/activedatastreamer.hxx b/ucbhelper/source/client/activedatastreamer.hxx
new file mode 100644
index 000000000..84ee10ac9
--- /dev/null
+++ b/ucbhelper/source/client/activedatastreamer.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 .
+ */
+
+#ifndef UCBHELPER_SOURCE_CLIENT_ACTIVEDATASTREAMER_HXX
+#define UCBHELPER_SOURCE_CLIENT_ACTIVEDATASTREAMER_HXX
+
+#include <com/sun/star/io/XActiveDataStreamer.hpp>
+#include <cppuhelper/implbase.hxx>
+
+namespace ucbhelper
+{
+/**
+  * This class implements the interface css::io::XActiveDataStreamer.
+  * Instances of this class can be passed with the parameters of an
+  * "open" command.
+  */
+
+class ActiveDataStreamer final : public cppu::WeakImplHelper<css::io::XActiveDataStreamer>
+{
+    css::uno::Reference<css::io::XStream> m_xStream;
+
+public:
+    // XActiveDataStreamer methods.
+    virtual void SAL_CALL setStream(const css::uno::Reference<css::io::XStream>& xStream) override;
+    virtual css::uno::Reference<css::io::XStream> SAL_CALL getStream() override;
+};
+
+} /* namespace ucbhelper */
+
+#endif /* ! UCBHELPER_SOURCE_CLIENT_ACTIVEDATASTREAMER_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/client/commandenvironment.cxx b/ucbhelper/source/client/commandenvironment.cxx
new file mode 100644
index 000000000..13bc254e0
--- /dev/null
+++ b/ucbhelper/source/client/commandenvironment.cxx
@@ -0,0 +1,84 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+
+#include <ucbhelper/commandenvironment.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+
+using namespace com::sun::star::lang;
+using namespace com::sun::star::task;
+using namespace com::sun::star::ucb;
+using namespace com::sun::star::uno;
+
+namespace com::sun::star::task { class XInteractionHandler; }
+namespace com::sun::star::ucb { class XProgressHandler; }
+
+namespace ucbhelper
+{
+// struct CommandEnvironment_Impl.
+
+struct CommandEnvironment_Impl
+{
+    Reference< XInteractionHandler > m_xInteractionHandler;
+    Reference< XProgressHandler > m_xProgressHandler;
+
+    CommandEnvironment_Impl( const Reference< XInteractionHandler >& rxInteractionHandler,
+                             const Reference< XProgressHandler >& rxProgressHandler )
+        : m_xInteractionHandler( rxInteractionHandler )
+        , m_xProgressHandler( rxProgressHandler ) {}
+};
+
+// CommandEnvironment Implementation.
+
+CommandEnvironment::CommandEnvironment(
+        const Reference< XInteractionHandler >& rxInteractionHandler,
+        const Reference< XProgressHandler >& rxProgressHandler )
+    : m_pImpl( new CommandEnvironment_Impl( rxInteractionHandler,
+                                            rxProgressHandler ) )
+{
+}
+
+// virtual
+CommandEnvironment::~CommandEnvironment()
+{
+}
+
+// XCommandEnvironment methods.
+
+// virtual
+Reference< XInteractionHandler > SAL_CALL CommandEnvironment::getInteractionHandler()
+{
+    return m_pImpl->m_xInteractionHandler;
+}
+
+// virtual
+Reference< XProgressHandler > SAL_CALL CommandEnvironment::getProgressHandler()
+{
+    return m_pImpl->m_xProgressHandler;
+}
+
+} /* namespace ucbhelper */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/client/content.cxx b/ucbhelper/source/client/content.cxx
new file mode 100644
index 000000000..4eeeab200
--- /dev/null
+++ b/ucbhelper/source/client/content.cxx
@@ -0,0 +1,1359 @@
+/* -*- 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 <o3tl/unreachable.hxx>
+#include <osl/diagnose.h>
+#include <mutex>
+#include <sal/log.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/queryinterface.hxx>
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/ucb/CheckinArgument.hpp>
+#include <com/sun/star/ucb/ContentCreationError.hpp>
+#include <com/sun/star/ucb/ContentCreationException.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/ucb/XCommandInfo.hpp>
+#include <com/sun/star/ucb/XCommandProcessor.hpp>
+#include <com/sun/star/ucb/Command.hpp>
+#include <com/sun/star/ucb/ContentAction.hpp>
+#include <com/sun/star/ucb/OpenCommandArgument2.hpp>
+#include <com/sun/star/ucb/InsertCommandArgument.hpp>
+#include <com/sun/star/ucb/GlobalTransferCommandArgument2.hpp>
+#include <com/sun/star/ucb/OpenMode.hpp>
+#include <com/sun/star/ucb/XContentCreator.hpp>
+#include <com/sun/star/ucb/XContentEventListener.hpp>
+#include <com/sun/star/ucb/XDynamicResultSet.hpp>
+#include <com/sun/star/ucb/SortedDynamicResultSetFactory.hpp>
+#include <com/sun/star/ucb/UniversalContentBroker.hpp>
+#include <com/sun/star/ucb/XUniversalContentBroker.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/sdbc/XRow.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/beans/UnknownPropertyException.hpp>
+#include <ucbhelper/content.hxx>
+#include <ucbhelper/activedatasink.hxx>
+#include "activedatastreamer.hxx"
+#include <ucbhelper/cancelcommandexecution.hxx>
+
+namespace com::sun::star::ucb { class XCommandEnvironment; }
+namespace com::sun::star::ucb { class XContentProvider; }
+namespace com::sun::star::sdbc { class XResultSet; }
+
+using namespace com::sun::star::container;
+using namespace com::sun::star::beans;
+using namespace com::sun::star::io;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::sdbc;
+using namespace com::sun::star::task;
+using namespace com::sun::star::ucb;
+using namespace com::sun::star::uno;
+
+namespace ucbhelper
+{
+
+namespace {
+
+class EmptyInputStream : public ::cppu::WeakImplHelper< XInputStream >
+{
+public:
+    virtual sal_Int32 SAL_CALL readBytes(
+        Sequence< sal_Int8 > & data, sal_Int32 nBytesToRead ) override;
+    virtual sal_Int32 SAL_CALL readSomeBytes(
+        Sequence< sal_Int8 > & data, sal_Int32 nMaxBytesToRead ) override;
+    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
+    virtual sal_Int32 SAL_CALL available() override;
+    virtual void SAL_CALL closeInput() override;
+};
+
+}
+
+sal_Int32 EmptyInputStream::readBytes(
+    Sequence< sal_Int8 > & data, sal_Int32 )
+{
+    data.realloc( 0 );
+    return 0;
+}
+
+sal_Int32 EmptyInputStream::readSomeBytes(
+    Sequence< sal_Int8 > & data, sal_Int32 )
+{
+    data.realloc( 0 );
+    return 0;
+}
+
+void EmptyInputStream::skipBytes( sal_Int32 )
+{
+}
+
+sal_Int32 EmptyInputStream::available()
+{
+    return 0;
+}
+
+void EmptyInputStream::closeInput()
+{
+}
+
+
+
+namespace {
+
+class ContentEventListener_Impl : public cppu::OWeakObject,
+                                      public XContentEventListener
+{
+    Content_Impl& m_rContent;
+
+public:
+    explicit ContentEventListener_Impl( Content_Impl& rContent )
+        : m_rContent( rContent ) {}
+
+    // XInterface
+    virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type & rType ) override;
+    virtual void SAL_CALL acquire()
+        noexcept override;
+    virtual void SAL_CALL release()
+        noexcept override;
+
+    // XContentEventListener
+    virtual void SAL_CALL contentEvent( const ContentEvent& evt ) override;
+
+    // XEventListener ( base of XContentEventListener )
+    virtual void SAL_CALL disposing( const EventObject& Source ) override;
+};
+
+}
+
+
+
+class Content_Impl : public salhelper::SimpleReferenceObject
+{
+friend ContentEventListener_Impl;
+
+    mutable OUString               m_aURL;
+    Reference< XComponentContext >      m_xCtx;
+    Reference< XContent >               m_xContent;
+    Reference< XCommandProcessor >          m_xCommandProcessor;
+    Reference< XCommandEnvironment >    m_xEnv;
+    Reference< XContentEventListener >  m_xContentEventListener;
+    mutable std::mutex                  m_aMutex;
+
+private:
+    void reinit( const Reference< XContent >& xContent );
+    void disposing(const EventObject& Source);
+    Reference< XContent > getContent_NoLock();
+    const OUString& getURL_NoLock() const;
+
+public:
+    Content_Impl() {};
+    Content_Impl( const Reference< XComponentContext >& rCtx,
+                  const Reference< XContent >& rContent,
+                  const Reference< XCommandEnvironment >& rEnv );
+
+    virtual ~Content_Impl() override;
+
+    const OUString&           getURL() const;
+    Reference< XContent >          getContent();
+    Reference< XCommandProcessor > getCommandProcessor();
+    Reference< XComponentContext > const & getComponentContext() const
+    { assert(m_xCtx.is()); return m_xCtx; }
+
+    Any  executeCommand( const Command& rCommand );
+
+    inline const Reference< XCommandEnvironment >& getEnvironment() const;
+    inline void setEnvironment(
+                        const Reference< XCommandEnvironment >& xNewEnv );
+
+    void inserted();
+};
+
+
+// Helpers.
+
+/// @throws ContentCreationException
+/// @throws RuntimeException
+static void ensureContentProviderForURL( const Reference< XUniversalContentBroker >& rBroker,
+                                         const OUString & rURL )
+{
+    Reference< XContentProvider > xProv
+        = rBroker->queryContentProvider( rURL );
+    if ( !xProv.is() )
+    {
+        throw ContentCreationException(
+            "No Content Provider available for URL: " + rURL,
+            Reference< XInterface >(),
+            ContentCreationError_NO_CONTENT_PROVIDER );
+    }
+}
+
+/// @throws ContentCreationException
+/// @throws RuntimeException
+static Reference< XContentIdentifier > getContentIdentifierThrow(
+                                    const Reference< XUniversalContentBroker > & rBroker,
+                                    const OUString & rURL)
+{
+    Reference< XContentIdentifier > xId
+        = rBroker->createContentIdentifier( rURL );
+
+    if (!xId.is())
+    {
+        ensureContentProviderForURL( rBroker, rURL );
+
+        throw ContentCreationException(
+            "Unable to create Content Identifier!",
+            Reference< XInterface >(),
+            ContentCreationError_IDENTIFIER_CREATION_FAILED );
+    }
+
+    return xId;
+}
+
+/// @throws RuntimeException
+static Reference< XContentIdentifier > getContentIdentifierNoThrow(
+                                    const Reference< XUniversalContentBroker > & rBroker,
+                                    const OUString & rURL)
+{
+    return rBroker->createContentIdentifier(rURL);
+}
+
+/// @throws ContentCreationException
+/// @throws RuntimeException
+static Reference< XContent > getContentThrow(
+                                    const Reference< XUniversalContentBroker > & rBroker,
+                                    const Reference< XContentIdentifier > & xId)
+{
+    Reference< XContent > xContent;
+    OUString msg;
+    try
+    {
+        xContent = rBroker->queryContent( xId );
+    }
+    catch ( IllegalIdentifierException const & e )
+    {
+        msg = e.Message;
+        // handled below.
+    }
+
+    if ( !xContent.is() )
+    {
+        ensureContentProviderForURL( rBroker, xId->getContentIdentifier() );
+
+        throw ContentCreationException(
+            "Unable to create Content for <" + xId->getContentIdentifier() + ">: " + msg,
+            Reference< XInterface >(),
+            ContentCreationError_CONTENT_CREATION_FAILED );
+    }
+
+    return xContent;
+}
+
+/// @throws RuntimeException
+static Reference< XContent > getContentNoThrow(
+                                    const Reference< XUniversalContentBroker > & rBroker,
+                                    const Reference< XContentIdentifier > & xId)
+{
+    Reference< XContent > xContent;
+    try
+    {
+        xContent = rBroker->queryContent( xId );
+    }
+    catch ( IllegalIdentifierException const & e )
+    {
+        SAL_WARN("ucbhelper", "getContentNoThrow: " << e);
+    }
+
+    return xContent;
+}
+
+
+// Content Implementation.
+
+
+Content::Content()
+: m_xImpl( new Content_Impl )
+{
+}
+
+
+Content::Content( const OUString& rURL,
+                  const Reference< XCommandEnvironment >& rEnv,
+                  const Reference< XComponentContext >& rCtx )
+{
+    Reference< XUniversalContentBroker > pBroker(
+        UniversalContentBroker::create( rCtx ) );
+
+    Reference< XContentIdentifier > xId
+        = getContentIdentifierThrow(pBroker, rURL);
+
+    Reference< XContent > xContent = getContentThrow(pBroker, xId);
+
+    m_xImpl = new Content_Impl( rCtx, xContent, rEnv );
+}
+
+
+Content::Content( const Reference< XContent >& rContent,
+                  const Reference< XCommandEnvironment >& rEnv,
+                  const Reference< XComponentContext >& rCtx )
+{
+    m_xImpl = new Content_Impl( rCtx, rContent, rEnv );
+}
+
+
+Content::Content( const Content& rOther )
+{
+    m_xImpl = rOther.m_xImpl;
+}
+
+Content::Content( Content&& rOther ) noexcept
+{
+    m_xImpl = std::move(rOther.m_xImpl);
+}
+
+// static
+bool Content::create( const OUString& rURL,
+                          const Reference< XCommandEnvironment >& rEnv,
+                          const Reference< XComponentContext >& rCtx,
+                          Content& rContent )
+{
+    Reference< XUniversalContentBroker > pBroker(
+        UniversalContentBroker::create( rCtx ) );
+
+    Reference< XContentIdentifier > xId
+        = getContentIdentifierNoThrow(pBroker, rURL);
+    if ( !xId.is() )
+        return false;
+
+    Reference< XContent > xContent = getContentNoThrow(pBroker, xId);
+    if ( !xContent.is() )
+        return false;
+
+    rContent.m_xImpl
+        = new Content_Impl( rCtx, xContent, rEnv );
+
+    return true;
+}
+
+
+Content::~Content()
+{
+}
+
+
+Content& Content::operator=( const Content& rOther )
+{
+    m_xImpl = rOther.m_xImpl;
+    return *this;
+}
+
+Content& Content::operator=( Content&& rOther ) noexcept
+{
+    m_xImpl = std::move(rOther.m_xImpl);
+    return *this;
+}
+
+Reference< XContent > Content::get() const
+{
+    return m_xImpl->getContent();
+}
+
+
+const OUString& Content::getURL() const
+{
+    return m_xImpl->getURL();
+}
+
+
+const Reference< XCommandEnvironment >& Content::getCommandEnvironment() const
+{
+    return m_xImpl->getEnvironment();
+}
+
+
+void Content::setCommandEnvironment(
+                        const Reference< XCommandEnvironment >& xNewEnv )
+{
+    m_xImpl->setEnvironment( xNewEnv );
+}
+
+
+Reference< XCommandInfo > Content::getCommands()
+{
+    Command aCommand;
+    aCommand.Name     = "getCommandInfo";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument = Any();
+
+    Any aResult = m_xImpl->executeCommand( aCommand );
+
+    Reference< XCommandInfo > xInfo;
+    aResult >>= xInfo;
+    return xInfo;
+}
+
+
+Reference< XPropertySetInfo > Content::getProperties()
+{
+    static constexpr OUStringLiteral sgetPropertySetInfo = u"getPropertySetInfo";
+    Command aCommand;
+    aCommand.Name     = sgetPropertySetInfo;
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument = Any();
+
+    Any aResult = m_xImpl->executeCommand( aCommand );
+
+    Reference< XPropertySetInfo > xInfo;
+    aResult >>= xInfo;
+    return xInfo;
+}
+
+
+Any Content::getPropertyValue( const OUString& rPropertyName )
+{
+    Sequence<OUString> aNames { rPropertyName };
+
+    Sequence< Any > aRet = getPropertyValues( aNames );
+    return aRet.getConstArray()[ 0 ];
+}
+
+
+Any Content::setPropertyValue( const OUString& rName,
+                                const Any& rValue )
+{
+    Sequence<OUString> aNames { rName };
+
+    Sequence< Any > aValues( 1 );
+    aValues.getArray()[ 0 ] = rValue;
+
+    Sequence< Any > aErrors = setPropertyValues( aNames, aValues );
+    return aErrors.getConstArray()[ 0 ];
+}
+
+
+Sequence< Any > Content::getPropertyValues(
+                            const Sequence< OUString >& rPropertyNames )
+{
+    Reference< XRow > xRow = getPropertyValuesInterface( rPropertyNames );
+
+    sal_Int32 nCount = rPropertyNames.getLength();
+    Sequence< Any > aValues( nCount );
+
+    if ( xRow.is() )
+    {
+        Any* pValues = aValues.getArray();
+
+        for ( sal_Int32 n = 0; n < nCount; ++n )
+            pValues[ n ] = xRow->getObject( n + 1, Reference< XNameAccess >() );
+    }
+
+    return aValues;
+}
+
+
+Reference< XRow > Content::getPropertyValuesInterface(
+                            const Sequence< OUString >& rPropertyNames )
+{
+    sal_Int32 nCount = rPropertyNames.getLength();
+    Sequence< Property > aProps( nCount );
+    Property* pProps = aProps.getArray();
+
+    const OUString* pNames  = rPropertyNames.getConstArray();
+
+    for ( sal_Int32 n = 0; n< nCount; ++n )
+    {
+        Property& rProp = pProps[ n ];
+
+        rProp.Name       = pNames[ n ];
+        rProp.Handle     = -1; // n/a
+//        rProp.Type       =
+//        rProp.Attributes = ;
+    }
+
+    static constexpr OUStringLiteral sgetPropertyValues = u"getPropertyValues";
+    Command aCommand;
+    aCommand.Name     = sgetPropertyValues;
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aProps;
+
+    Any aResult = m_xImpl->executeCommand( aCommand );
+
+    Reference< XRow > xRow;
+    aResult >>= xRow;
+    return xRow;
+}
+
+
+Sequence< Any > Content::setPropertyValues(
+                            const Sequence< OUString >& rPropertyNames,
+                                const Sequence< Any >& rValues )
+{
+    if ( rPropertyNames.getLength() != rValues.getLength() )
+    {
+        ucbhelper::cancelCommandExecution(
+            Any( IllegalArgumentException(
+                        "Length of property names sequence and value "
+                        "sequence are unequal!",
+                        get(),
+                        -1 ) ),
+            m_xImpl->getEnvironment() );
+        // Unreachable
+    }
+
+    sal_Int32 nCount = rValues.getLength();
+    Sequence< PropertyValue > aProps( nCount );
+    PropertyValue* pProps = aProps.getArray();
+
+    const OUString* pNames  = rPropertyNames.getConstArray();
+    const Any* pValues = rValues.getConstArray();
+
+    for ( sal_Int32 n = 0; n< nCount; ++n )
+    {
+        PropertyValue& rProp = pProps[ n ];
+
+        rProp.Name   = pNames[ n ];
+        rProp.Handle = -1; // n/a
+        rProp.Value  = pValues[ n ];
+//        rProp.State  = ;
+    }
+
+    Command aCommand;
+    aCommand.Name     = "setPropertyValues";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aProps;
+
+    Any aResult = m_xImpl->executeCommand( aCommand );
+
+    Sequence< Any > aErrors;
+    aResult >>= aErrors;
+    return aErrors;
+}
+
+
+Any Content::executeCommand( const OUString& rCommandName,
+                             const Any& rCommandArgument )
+{
+    Command aCommand;
+    aCommand.Name     = rCommandName;
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument = rCommandArgument;
+
+    return m_xImpl->executeCommand( aCommand );
+}
+
+
+Any Content::createCursorAny( const Sequence< OUString >& rPropertyNames,
+                              ResultSetInclude eMode )
+{
+    sal_Int32 nCount = rPropertyNames.getLength();
+    Sequence< Property > aProps( nCount );
+    Property* pProps = aProps.getArray();
+    const OUString* pNames = rPropertyNames.getConstArray();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        Property& rProp = pProps[ n ];
+        rProp.Name   = pNames[ n ];
+        rProp.Handle = -1; // n/a
+    }
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = ( eMode == INCLUDE_FOLDERS_ONLY )
+                        ? OpenMode::FOLDERS
+                        : ( eMode == INCLUDE_DOCUMENTS_ONLY )
+                            ? OpenMode::DOCUMENTS : OpenMode::ALL;
+    aArg.Priority   = 0; // unused
+    aArg.Sink.clear(); // unused
+    aArg.Properties = aProps;
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    return m_xImpl->executeCommand( aCommand );
+}
+
+
+Reference< XResultSet > Content::createCursor(
+                            const Sequence< OUString >& rPropertyNames,
+                            ResultSetInclude eMode )
+{
+    Any aCursorAny = createCursorAny( rPropertyNames, eMode );
+
+    Reference< XDynamicResultSet > xDynSet;
+    Reference< XResultSet > aResult;
+
+    aCursorAny >>= xDynSet;
+    if ( xDynSet.is() )
+        aResult = xDynSet->getStaticResultSet();
+
+    OSL_ENSURE( aResult.is(), "Content::createCursor - no cursor!" );
+
+    if ( !aResult.is() )
+    {
+        // Former, the open command directly returned a XResultSet.
+        aCursorAny >>= aResult;
+
+        OSL_ENSURE( !aResult.is(),
+                    "Content::createCursor - open-Command must "
+                    "return a Reference< XDynnamicResultSet >!" );
+    }
+
+    return aResult;
+}
+
+
+Reference< XDynamicResultSet > Content::createDynamicCursor(
+                            const Sequence< OUString >& rPropertyNames,
+                            ResultSetInclude eMode )
+{
+    Reference< XDynamicResultSet > aResult;
+    createCursorAny( rPropertyNames, eMode ) >>= aResult;
+
+    OSL_ENSURE( aResult.is(), "Content::createDynamicCursor - no cursor!" );
+
+    return aResult;
+}
+
+
+Reference< XResultSet > Content::createSortedCursor(
+                            const Sequence< OUString >& rPropertyNames,
+                            const Sequence< NumberedSortingInfo >& rSortInfo,
+                            const Reference< XAnyCompareFactory >& rAnyCompareFactory,
+                            ResultSetInclude eMode )
+{
+    Reference< XResultSet > aResult;
+    Reference< XDynamicResultSet > aDynSet;
+
+    Any aCursorAny = createCursorAny( rPropertyNames, eMode );
+
+    aCursorAny >>= aDynSet;
+
+    if( aDynSet.is() )
+    {
+        Reference< XDynamicResultSet > aDynResult;
+
+        if( m_xImpl->getComponentContext().is() )
+        {
+            Reference< XSortedDynamicResultSetFactory > aSortFactory =
+                                SortedDynamicResultSetFactory::create( m_xImpl->getComponentContext());
+
+            aDynResult = aSortFactory->createSortedDynamicResultSet( aDynSet,
+                                                              rSortInfo,
+                                                              rAnyCompareFactory );
+        }
+
+        OSL_ENSURE( aDynResult.is(), "Content::createSortedCursor - no sorted cursor!" );
+
+        if( aDynResult.is() )
+            aResult = aDynResult->getStaticResultSet();
+        else
+            aResult = aDynSet->getStaticResultSet();
+    }
+
+    OSL_ENSURE( aResult.is(), "Content::createSortedCursor - no cursor!" );
+
+    if ( !aResult.is() )
+    {
+        // Former, the open command directly returned a XResultSet.
+        aCursorAny >>= aResult;
+
+        OSL_ENSURE( !aResult.is(),
+                    "Content::createCursor - open-Command must "
+                    "return a Reference< XDynnamicResultSet >!" );
+    }
+
+    return aResult;
+}
+
+
+Reference< XInputStream > Content::openStream()
+{
+    if ( !isDocument() )
+        return Reference< XInputStream >();
+
+    Reference< XActiveDataSink > xSink = new ActiveDataSink;
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = OpenMode::DOCUMENT;
+    aArg.Priority   = 0; // unused
+    aArg.Sink       = xSink;
+    aArg.Properties = Sequence< Property >( 0 ); // unused
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    return xSink->getInputStream();
+}
+
+
+Reference< XInputStream > Content::openStreamNoLock()
+{
+    if ( !isDocument() )
+        return Reference< XInputStream >();
+
+    Reference< XActiveDataSink > xSink = new ActiveDataSink;
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = OpenMode::DOCUMENT_SHARE_DENY_NONE;
+    aArg.Priority   = 0; // unused
+    aArg.Sink       = xSink;
+    aArg.Properties = Sequence< Property >( 0 ); // unused
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    return xSink->getInputStream();
+}
+
+
+Reference< XStream > Content::openWriteableStream()
+{
+    if ( !isDocument() )
+        return Reference< XStream >();
+
+    Reference< XActiveDataStreamer > xStreamer = new ActiveDataStreamer;
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = OpenMode::DOCUMENT;
+    aArg.Priority   = 0; // unused
+    aArg.Sink       = xStreamer;
+    aArg.Properties = Sequence< Property >( 0 ); // unused
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    return xStreamer->getStream();
+}
+
+
+Reference< XStream > Content::openWriteableStreamNoLock()
+{
+    if ( !isDocument() )
+        return Reference< XStream >();
+
+    Reference< XActiveDataStreamer > xStreamer = new ActiveDataStreamer;
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = OpenMode::DOCUMENT_SHARE_DENY_NONE;
+    aArg.Priority   = 0; // unused
+    aArg.Sink       = xStreamer;
+    aArg.Properties = Sequence< Property >( 0 ); // unused
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    return xStreamer->getStream();
+}
+
+
+bool Content::openStream( const Reference< XActiveDataSink >& rSink )
+{
+    if ( !isDocument() )
+        return false;
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = OpenMode::DOCUMENT;
+    aArg.Priority   = 0; // unused
+    aArg.Sink       = rSink;
+    aArg.Properties = Sequence< Property >( 0 ); // unused
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    return true;
+}
+
+
+bool Content::openStream( const Reference< XOutputStream >& rStream )
+{
+    if ( !isDocument() )
+        return false;
+
+    OpenCommandArgument2 aArg;
+    aArg.Mode       = OpenMode::DOCUMENT;
+    aArg.Priority   = 0; // unused
+    aArg.Sink       = rStream;
+    aArg.Properties = Sequence< Property >( 0 ); // unused
+
+    Command aCommand;
+    aCommand.Name     = "open";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    return true;
+}
+
+
+void Content::writeStream( const Reference< XInputStream >& rStream,
+                           bool bReplaceExisting )
+{
+    InsertCommandArgument aArg;
+    aArg.Data            = rStream.is() ? rStream : new EmptyInputStream;
+    aArg.ReplaceExisting = bReplaceExisting;
+
+    Command aCommand;
+    aCommand.Name     = "insert";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aArg;
+
+    m_xImpl->executeCommand( aCommand );
+
+    m_xImpl->inserted();
+}
+
+
+Sequence< ContentInfo > Content::queryCreatableContentsInfo()
+{
+    // First, try it using "CreatableContentsInfo" property -> the "new" way.
+    Sequence< ContentInfo > aInfo;
+    if ( getPropertyValue(
+             "CreatableContentsInfo" )
+         >>= aInfo )
+        return aInfo;
+
+    // Second, try it using XContentCreator interface -> the "old" way (not
+    // providing the chance to supply an XCommandEnvironment.
+    Reference< XContentCreator > xCreator( m_xImpl->getContent(), UNO_QUERY );
+    if ( xCreator.is() )
+        aInfo = xCreator->queryCreatableContentsInfo();
+
+    return aInfo;
+}
+
+
+bool Content::insertNewContent( const OUString& rContentType,
+                                    const Sequence< OUString >&
+                                        rPropertyNames,
+                                    const Sequence< Any >& rPropertyValues,
+                                    Content& rNewContent )
+{
+    return insertNewContent( rContentType,
+                             rPropertyNames,
+                             rPropertyValues,
+                             new EmptyInputStream,
+                             rNewContent );
+}
+
+
+bool Content::insertNewContent( const OUString& rContentType,
+                                    const Sequence< OUString >&
+                                        rPropertyNames,
+                                    const Sequence< Any >& rPropertyValues,
+                                    const Reference< XInputStream >& rData,
+                                    Content& rNewContent )
+{
+    if ( rContentType.isEmpty() )
+        return false;
+
+    // First, try it using "createNewContent" command -> the "new" way.
+    ContentInfo aInfo;
+    aInfo.Type = rContentType;
+    aInfo.Attributes = 0;
+
+    Command aCommand;
+    aCommand.Name     = "createNewContent";
+    aCommand.Handle   = -1; // n/a
+    aCommand.Argument <<= aInfo;
+
+    Reference< XContent > xNew;
+    try
+    {
+        m_xImpl->executeCommand( aCommand ) >>= xNew;
+    }
+    catch ( RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( Exception const & )
+    {
+    }
+
+    if ( !xNew.is() )
+    {
+        // Second, try it using XContentCreator interface -> the "old"
+        // way (not providing the chance to supply an XCommandEnvironment.
+        Reference< XContentCreator > xCreator( m_xImpl->getContent(), UNO_QUERY );
+
+        if ( !xCreator.is() )
+            return false;
+
+        xNew = xCreator->createNewContent( aInfo );
+
+        if ( !xNew.is() )
+            return false;
+    }
+
+    Content aNewContent(
+        xNew, m_xImpl->getEnvironment(), m_xImpl->getComponentContext() );
+    aNewContent.setPropertyValues( rPropertyNames, rPropertyValues );
+    aNewContent.executeCommand( "insert",
+                                Any(
+                                    InsertCommandArgument(
+                                        rData.is() ? rData : new EmptyInputStream,
+                                        false /* ReplaceExisting */ ) ) );
+    aNewContent.m_xImpl->inserted();
+
+    rNewContent = aNewContent;
+    return true;
+}
+
+
+void Content::transferContent( const Content& rSourceContent,
+                                   InsertOperation eOperation,
+                                   const OUString & rTitle,
+                                   const sal_Int32 nNameClashAction,
+                                   const OUString & rMimeType,
+                                   bool bMajorVersion,
+                                   const OUString & rVersionComment,
+                                   OUString* pResultURL,
+                                   const OUString & rDocumentId ) const
+{
+    Reference< XUniversalContentBroker > pBroker(
+        UniversalContentBroker::create( m_xImpl->getComponentContext() ) );
+
+    // Execute command "globalTransfer" at UCB.
+
+    TransferCommandOperation eTransOp = TransferCommandOperation();
+    OUString sCommand( "globalTransfer" );
+    bool bCheckIn = false;
+    switch ( eOperation )
+    {
+        case InsertOperation::Copy:
+            eTransOp = TransferCommandOperation_COPY;
+            break;
+
+        case InsertOperation::Move:
+            eTransOp = TransferCommandOperation_MOVE;
+            break;
+
+        case InsertOperation::Checkin:
+            eTransOp = TransferCommandOperation_COPY;
+            sCommand = "checkin";
+            bCheckIn = true;
+            break;
+    }
+    Command aCommand;
+    aCommand.Name     = sCommand;
+    aCommand.Handle   = -1; // n/a
+
+    if ( !bCheckIn )
+    {
+        GlobalTransferCommandArgument2 aTransferArg(
+                                            eTransOp,
+                                            rSourceContent.getURL(), // SourceURL
+                                            getURL(),   // TargetFolderURL,
+                                            rTitle,
+                                            nNameClashAction,
+                                            rMimeType,
+                                            rDocumentId );
+        aCommand.Argument <<= aTransferArg;
+    }
+    else
+    {
+        CheckinArgument aCheckinArg( bMajorVersion, rVersionComment,
+                rSourceContent.getURL(), getURL(), rTitle, rMimeType );
+        aCommand.Argument <<= aCheckinArg;
+    }
+
+    Any aRet = pBroker->execute( aCommand, 0, m_xImpl->getEnvironment() );
+    if ( pResultURL != nullptr )
+        aRet >>= *pResultURL;
+}
+
+
+bool Content::isFolder()
+{
+    bool bFolder = false;
+    if ( getPropertyValue("IsFolder")
+        >>= bFolder )
+        return bFolder;
+
+    ucbhelper::cancelCommandExecution(
+         Any( UnknownPropertyException(
+                    "Unable to retrieve value of property 'IsFolder'!",
+                    get() ) ),
+         m_xImpl->getEnvironment() );
+
+    O3TL_UNREACHABLE;
+}
+
+
+SAL_WNOUNREACHABLE_CODE_PUSH
+
+bool Content::isDocument()
+{
+    bool bDoc = false;
+    if ( getPropertyValue("IsDocument")
+        >>= bDoc )
+        return bDoc;
+
+    ucbhelper::cancelCommandExecution(
+         Any( UnknownPropertyException(
+                    "Unable to retrieve value of property 'IsDocument'!",
+                    get() ) ),
+         m_xImpl->getEnvironment() );
+
+    // Unreachable - cancelCommandExecution always throws an exception,
+    // But some compilers complain...
+    return false;
+}
+
+SAL_WNOUNREACHABLE_CODE_POP
+
+void Content::lock()
+{
+    Command aCommand;
+    aCommand.Name     = "lock";
+    aCommand.Handle   = -1; // n/a
+
+    m_xImpl->executeCommand( aCommand );
+
+}
+
+void Content::unlock()
+{
+
+    Command aCommand;
+    aCommand.Name     = "unlock";
+    aCommand.Handle   = -1; // n/a
+
+    m_xImpl->executeCommand( aCommand );
+
+}
+
+
+// Content_Impl Implementation.
+
+
+Content_Impl::Content_Impl( const Reference< XComponentContext >& rCtx,
+                            const Reference< XContent >& rContent,
+                            const Reference< XCommandEnvironment >& rEnv )
+: m_xCtx( rCtx ),
+  m_xContent( rContent ),
+  m_xEnv( rEnv )
+{
+    assert(rCtx.is());
+    if ( m_xContent.is() )
+    {
+        m_xContentEventListener = new ContentEventListener_Impl( *this );
+        m_xContent->addContentEventListener( m_xContentEventListener );
+
+#if OSL_DEBUG_LEVEL > 0
+        // Only done on demand in product version for performance reasons,
+        // but a nice debug helper.
+        getURL();
+#endif
+    }
+}
+
+
+void Content_Impl::reinit( const Reference< XContent >& xContent )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    m_xCommandProcessor = nullptr;
+
+    // #92581# - Don't reset m_aURL!!!
+
+    if ( m_xContent.is() )
+    {
+        try
+        {
+            m_xContent->removeContentEventListener( m_xContentEventListener );
+        }
+        catch ( RuntimeException const & )
+        {
+        }
+    }
+
+    if ( xContent.is() )
+    {
+        m_xContent = xContent;
+        m_xContent->addContentEventListener( m_xContentEventListener );
+
+#if OSL_DEBUG_LEVEL > 0
+        // Only done on demand in product version for performance reasons,
+        // but a nice debug helper.
+        getURL_NoLock();
+#endif
+    }
+    else
+    {
+        // We need m_xContent's URL in order to be able to create the
+        // content object again if demanded ( --> Content_Impl::getContent() )
+        getURL_NoLock();
+
+        m_xContent = nullptr;
+    }
+}
+
+
+// virtual
+Content_Impl::~Content_Impl()
+{
+    if ( m_xContent.is() )
+    {
+        try
+        {
+            m_xContent->removeContentEventListener( m_xContentEventListener );
+        }
+        catch ( RuntimeException const & )
+        {
+        }
+    }
+}
+
+
+void Content_Impl::disposing( const EventObject& Source )
+{
+    Reference<XContent> xContent;
+
+    {
+        std::unique_lock aGuard( m_aMutex );
+        if(Source.Source != m_xContent)
+            return;
+
+        xContent = m_xContent;
+
+        m_aURL.clear();
+        m_xCommandProcessor = nullptr;
+        m_xContent = nullptr;
+    }
+
+    if ( xContent.is() )
+    {
+        try
+        {
+            xContent->removeContentEventListener( m_xContentEventListener );
+        }
+        catch ( RuntimeException const & )
+        {
+        }
+    }
+}
+
+
+const OUString& Content_Impl::getURL() const
+{
+    if ( m_aURL.isEmpty() && m_xContent.is() )
+    {
+        std::unique_lock aGuard( m_aMutex );
+
+        return getURL_NoLock();
+    }
+
+    return m_aURL;
+}
+
+const OUString& Content_Impl::getURL_NoLock() const
+{
+    if ( m_aURL.isEmpty() && m_xContent.is() )
+    {
+        Reference< XContentIdentifier > xId = m_xContent->getIdentifier();
+        if ( xId.is() )
+            m_aURL = xId->getContentIdentifier();
+    }
+
+    return m_aURL;
+}
+
+Reference< XContent > Content_Impl::getContent()
+{
+    if ( !m_xContent.is() && !m_aURL.isEmpty() )
+    {
+        std::unique_lock aGuard( m_aMutex );
+        return getContent_NoLock();
+    }
+    return m_xContent;
+}
+
+Reference< XContent > Content_Impl::getContent_NoLock()
+{
+    if ( !m_xContent.is() && !m_aURL.isEmpty() )
+    {
+        Reference< XUniversalContentBroker > pBroker(
+            UniversalContentBroker::create( getComponentContext() ) );
+
+        OSL_ENSURE( pBroker->queryContentProviders().hasElements(),
+                    "Content Broker not configured (no providers)!" );
+
+        Reference< XContentIdentifier > xId
+            = pBroker->createContentIdentifier( m_aURL );
+
+        OSL_ENSURE( xId.is(), "No Content Identifier!" );
+
+        if ( xId.is() )
+        {
+            try
+            {
+                m_xContent = pBroker->queryContent( xId );
+            }
+            catch ( IllegalIdentifierException const & )
+            {
+            }
+
+            if ( m_xContent.is() )
+                m_xContent->addContentEventListener(
+                    m_xContentEventListener );
+        }
+    }
+
+    return m_xContent;
+}
+
+
+Reference< XCommandProcessor > Content_Impl::getCommandProcessor()
+{
+    if ( !m_xCommandProcessor.is() )
+    {
+        std::unique_lock aGuard( m_aMutex );
+
+        if ( !m_xCommandProcessor.is() )
+            m_xCommandProcessor.set( getContent_NoLock(), UNO_QUERY );
+    }
+
+    return m_xCommandProcessor;
+}
+
+
+Any Content_Impl::executeCommand( const Command& rCommand )
+{
+    Reference< XCommandProcessor > xProc = getCommandProcessor();
+    if ( !xProc.is() )
+        return Any();
+
+    // Execute command
+    return xProc->execute( rCommand, 0, m_xEnv );
+}
+
+
+inline const Reference< XCommandEnvironment >&
+                                        Content_Impl::getEnvironment() const
+{
+    return m_xEnv;
+}
+
+
+inline void Content_Impl::setEnvironment(
+                        const Reference< XCommandEnvironment >& xNewEnv )
+{
+    std::unique_lock aGuard( m_aMutex );
+    m_xEnv = xNewEnv;
+}
+
+
+void Content_Impl::inserted()
+{
+    // URL might have changed during 'insert' => recalculate in next getURL()
+    std::unique_lock aGuard( m_aMutex );
+    m_aURL.clear();
+}
+
+
+// ContentEventListener_Impl Implementation.
+
+
+// XInterface methods.
+
+void SAL_CALL ContentEventListener_Impl::acquire()
+    noexcept
+{
+    OWeakObject::acquire();
+}
+
+void SAL_CALL ContentEventListener_Impl::release()
+    noexcept
+{
+    OWeakObject::release();
+}
+
+css::uno::Any SAL_CALL ContentEventListener_Impl::queryInterface( const css::uno::Type & rType )
+{
+    css::uno::Any aRet = cppu::queryInterface( rType,
+                                               static_cast< XContentEventListener* >(this),
+                                               static_cast< XEventListener* >(this)
+                                               );
+    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
+}
+
+// XContentEventListener methods.
+
+
+// virtual
+void SAL_CALL ContentEventListener_Impl::contentEvent( const ContentEvent& evt )
+{
+    if ( evt.Source != m_rContent.m_xContent )
+        return;
+
+    switch ( evt.Action )
+    {
+        case ContentAction::DELETED:
+            m_rContent.reinit( Reference< XContent >() );
+            break;
+
+        case ContentAction::EXCHANGED:
+            m_rContent.reinit( evt.Content );
+            break;
+
+        default:
+            break;
+    }
+}
+
+
+// XEventListenr methods.
+
+
+// virtual
+void SAL_CALL ContentEventListener_Impl::disposing( const EventObject& Source )
+{
+    m_rContent.disposing(Source);
+}
+
+} /* namespace ucbhelper */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/client/interceptedinteraction.cxx b/ucbhelper/source/client/interceptedinteraction.cxx
new file mode 100644
index 000000000..96b3fd32c
--- /dev/null
+++ b/ucbhelper/source/client/interceptedinteraction.cxx
@@ -0,0 +1,138 @@
+/* -*- 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 <ucbhelper/interceptedinteraction.hxx>
+
+#include <osl/diagnose.h>
+
+namespace ucbhelper{
+
+InterceptedInteraction::InterceptedInteraction()
+{
+}
+
+void InterceptedInteraction::setInterceptedHandler(const css::uno::Reference< css::task::XInteractionHandler >& xInterceptedHandler)
+{
+    m_xInterceptedHandler = xInterceptedHandler;
+}
+
+void InterceptedInteraction::setInterceptions(::std::vector< InterceptedRequest >&& lInterceptions)
+{
+    m_lInterceptions = std::move(lInterceptions);
+}
+
+InterceptedInteraction::EInterceptionState InterceptedInteraction::intercepted(
+    const InterceptedRequest&,
+    const css::uno::Reference< css::task::XInteractionRequest >&)
+{
+    // default behaviour! see impl_interceptRequest() for further information ...
+    return E_NOT_INTERCEPTED;
+}
+
+css::uno::Reference< css::task::XInteractionContinuation > InterceptedInteraction::extractContinuation(const css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > >& lContinuations,
+                                                                                                       const css::uno::Type&                                                                   aType         )
+{
+    const css::uno::Reference< css::task::XInteractionContinuation >* pContinuations = std::find_if(lContinuations.begin(), lContinuations.end(),
+        [&aType](const css::uno::Reference< css::task::XInteractionContinuation >& rContinuation) {
+            css::uno::Reference< css::uno::XInterface > xCheck(rContinuation, css::uno::UNO_QUERY);
+            return xCheck->queryInterface(aType).hasValue();
+        });
+    if (pContinuations != lContinuations.end())
+        return *pContinuations;
+
+    return css::uno::Reference< css::task::XInteractionContinuation >();
+}
+
+void SAL_CALL InterceptedInteraction::handle(const css::uno::Reference< css::task::XInteractionRequest >& xRequest)
+{
+    impl_handleDefault(xRequest);
+}
+
+void InterceptedInteraction::impl_handleDefault(const css::uno::Reference< css::task::XInteractionRequest >& xRequest)
+{
+    EInterceptionState eState = impl_interceptRequest(xRequest);
+
+    switch(eState)
+    {
+        case E_NOT_INTERCEPTED:
+        {
+            // Non of the intercepted requests match to the given one.
+            // => forward request to the internal wrapped handler - if there is one.
+            if (m_xInterceptedHandler.is())
+                m_xInterceptedHandler->handle(xRequest);
+        }
+        break;
+
+        case E_NO_CONTINUATION_FOUND:
+        {
+            // Runtime error! The defined continuation could not be located
+            // inside the set of available continuations of the incoming request.
+            // What's wrong - the interception list or the request?
+            OSL_FAIL("InterceptedInteraction::handle()\nCould intercept this interaction request - but can't locate the right continuation!");
+        }
+        break;
+
+        case E_INTERCEPTED:
+        break;
+    }
+}
+
+InterceptedInteraction::EInterceptionState InterceptedInteraction::impl_interceptRequest(const css::uno::Reference< css::task::XInteractionRequest >& xRequest)
+{
+    css::uno::Any                                                                    aRequest       = xRequest->getRequest();
+    const css::uno::Type&                                                            aRequestType   = aRequest.getValueType();
+    css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > lContinuations = xRequest->getContinuations();
+
+    // check against the list of static requests
+    auto pIt = std::find_if(m_lInterceptions.begin(), m_lInterceptions.end(),
+        [&aRequestType](const InterceptedRequest& rInterception) {
+            // check the request
+            // don't change intercepted and request type here -> it will check the wrong direction!
+            return rInterception.Request.getValueType().isAssignableFrom(aRequestType);
+        });
+
+    if (pIt != m_lInterceptions.end()) // intercepted ...
+    {
+        const InterceptedRequest& rInterception = *pIt;
+
+        // Call they might existing derived class, so they can handle that by its own.
+        // If it's not interested on that (maybe it's not overwritten and the default implementation
+        // returns E_NOT_INTERCEPTED as default) -> search required continuation
+        EInterceptionState eState = intercepted(rInterception, xRequest);
+        if (eState != E_NOT_INTERCEPTED)
+            return eState;
+
+        css::uno::Reference< css::task::XInteractionContinuation > xContinuation = InterceptedInteraction::extractContinuation(lContinuations, rInterception.Continuation);
+        if (xContinuation.is())
+        {
+            xContinuation->select();
+            return E_INTERCEPTED;
+        }
+
+        // Can be reached only, if the request does not support the given continuation!
+        // => RuntimeError!?
+        return E_NO_CONTINUATION_FOUND;
+    }
+
+    return E_NOT_INTERCEPTED;
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/client/proxydecider.cxx b/ucbhelper/source/client/proxydecider.cxx
new file mode 100644
index 000000000..10228b72a
--- /dev/null
+++ b/ucbhelper/source/client/proxydecider.cxx
@@ -0,0 +1,960 @@
+/* -*- 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 <string_view>
+#include <utility>
+#include <vector>
+#include <deque>
+
+#include <osl/diagnose.h>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+#include <osl/socket.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/util/XChangesListener.hpp>
+#include <com/sun/star/util/XChangesNotifier.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <ucbhelper/proxydecider.hxx>
+#include <o3tl/string_view.hxx>
+
+#ifdef _WIN32
+#include <o3tl/char16_t2wchar_t.hxx>
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+#include <Winhttp.h>
+#endif
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+constexpr OUStringLiteral CONFIG_ROOT_KEY = u"org.openoffice.Inet/Settings";
+constexpr OUStringLiteral PROXY_TYPE_KEY = u"ooInetProxyType";
+constexpr OUStringLiteral NO_PROXY_LIST_KEY = u"ooInetNoProxy";
+constexpr OUStringLiteral HTTP_PROXY_NAME_KEY = u"ooInetHTTPProxyName";
+constexpr OUStringLiteral HTTP_PROXY_PORT_KEY = u"ooInetHTTPProxyPort";
+constexpr OUStringLiteral HTTPS_PROXY_NAME_KEY = u"ooInetHTTPSProxyName";
+constexpr OUStringLiteral HTTPS_PROXY_PORT_KEY = u"ooInetHTTPSProxyPort";
+constexpr OUStringLiteral FTP_PROXY_NAME_KEY = u"ooInetFTPProxyName";
+constexpr OUStringLiteral FTP_PROXY_PORT_KEY = u"ooInetFTPProxyPort";
+
+
+namespace ucbhelper
+{
+
+
+namespace proxydecider_impl
+{
+
+namespace {
+
+// A simple case ignoring wildcard matcher.
+class WildCard
+{
+private:
+    OString m_aWildString;
+
+public:
+    explicit WildCard( std::u16string_view rWildCard )
+    : m_aWildString(
+        OUStringToOString(
+            rWildCard, RTL_TEXTENCODING_UTF8 ).toAsciiLowerCase() ) {}
+
+    bool Matches( std::u16string_view rStr ) const;
+};
+
+}
+
+namespace {
+
+class HostnameCache
+{
+    typedef std::pair< OUString, OUString > HostListEntry;
+
+    std::deque< HostListEntry >    m_aHostList;
+
+public:
+    bool get( std::u16string_view rKey, OUString & rValue ) const
+    {
+        for (auto const& host : m_aHostList)
+        {
+            if ( host.first == rKey )
+            {
+                rValue = host.second;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    void put( const OUString & rKey, const OUString & rValue )
+    {
+        static constexpr sal_uInt32 nCapacity = 256;
+
+        if ( m_aHostList.size() == nCapacity )
+            m_aHostList.resize( nCapacity / 2 );
+
+        m_aHostList.push_front( HostListEntry( rKey, rValue ) );
+    }
+};
+
+}
+
+class InternetProxyDecider_Impl :
+    public cppu::WeakImplHelper< util::XChangesListener >
+{
+    // see officecfg/registry/schema/org/openoffice/Inet.xcs for the definition of these values
+    enum class ProxyType { NoProxy, Automatic, Manual };
+    mutable osl::Mutex                       m_aMutex;
+    InternetProxyServer                      m_aHttpProxy;
+    InternetProxyServer                      m_aHttpsProxy;
+    InternetProxyServer                      m_aFtpProxy;
+    const InternetProxyServer                m_aEmptyProxy;
+    ProxyType                                m_nProxyType;
+    uno::Reference< util::XChangesNotifier > m_xNotifier;
+    typedef std::pair< WildCard, WildCard > NoProxyListEntry;
+    std::vector< NoProxyListEntry >          m_aNoProxyList;
+    mutable HostnameCache                    m_aHostnames;
+
+private:
+    bool shouldUseProxy( std::u16string_view rHost,
+                         sal_Int32 nPort,
+                         bool bUseFullyQualified ) const;
+public:
+    explicit InternetProxyDecider_Impl(
+        const uno::Reference< uno::XComponentContext >& rxContext );
+
+    void dispose();
+
+    InternetProxyServer getProxy(const OUString& rProtocol,
+                                          const OUString & rHost,
+                                          sal_Int32 nPort ) const;
+
+    // XChangesListener
+    virtual void SAL_CALL changesOccurred( const util::ChangesEvent& Event ) override;
+
+    // XEventListener ( base of XChangesLisetenr )
+    virtual void SAL_CALL disposing( const lang::EventObject& Source ) override;
+
+private:
+    void setNoProxyList( const OUString & rNoProxyList );
+};
+
+
+// WildCard Implementation.
+
+
+bool WildCard::Matches( std::u16string_view rString ) const
+{
+    OString aString
+        = OUStringToOString( rString, RTL_TEXTENCODING_UTF8 ).toAsciiLowerCase();
+    const char * pStr  = aString.getStr();
+    const char * pWild = m_aWildString.getStr();
+
+    int pos  = 0;
+    int flag = 0;
+
+    while ( *pWild || flag )
+    {
+        switch ( *pWild )
+        {
+            case '?':
+                if ( *pStr == '\0' )
+                    return false;
+                break;
+
+            default:
+                if ( ( *pWild == '\\' ) && ( ( *( pWild + 1 ) == '?' )
+                                             || ( *( pWild + 1 ) == '*') ) )
+                    pWild++;
+                if ( *pWild != *pStr )
+                    if ( !pos )
+                        return false;
+                    else
+                        pWild += pos;
+                else
+                    break;
+
+                [[fallthrough]];
+
+            case '*':
+                while ( *pWild == '*' )
+                    pWild++;
+                if ( *pWild == '\0' )
+                    return true;
+                flag = 1;
+                pos  = 0;
+                if ( *pStr == '\0' )
+                    return ( *pWild == '\0' );
+                while ( *pStr && *pStr != *pWild )
+                {
+                    if ( *pWild == '?' ) {
+                        pWild++;
+                        while ( *pWild == '*' )
+                            pWild++;
+                    }
+                    pStr++;
+                    if ( *pStr == '\0' )
+                        return ( *pWild == '\0' );
+                }
+                break;
+        }
+        if ( *pWild != '\0' )
+            pWild++;
+        if ( *pStr != '\0' )
+            pStr++;
+        else
+            flag = 0;
+        if ( flag )
+            pos--;
+    }
+    return ( *pStr == '\0' ) && ( *pWild == '\0' );
+}
+
+
+static bool getConfigStringValue(
+    const uno::Reference< container::XNameAccess > & xNameAccess,
+    const OUString& key,
+    OUString & value )
+{
+    try
+    {
+        if ( !( xNameAccess->getByName( key ) >>= value ) )
+        {
+            OSL_FAIL( "InternetProxyDecider - "
+                        "Error getting config item value!" );
+            return false;
+        }
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        return false;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        return false;
+    }
+    return true;
+}
+
+
+static bool getConfigInt32Value(
+    const uno::Reference< container::XNameAccess > & xNameAccess,
+    const OUString& key,
+    sal_Int32 & value )
+{
+    try
+    {
+        uno::Any aValue = xNameAccess->getByName( key );
+        if ( aValue.hasValue() && !( aValue >>= value ) )
+        {
+            OSL_FAIL( "InternetProxyDecider - "
+                        "Error getting config item value!" );
+            return false;
+        }
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        return false;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        return false;
+    }
+    return true;
+}
+
+
+// InternetProxyDecider_Impl Implementation.
+
+
+InternetProxyDecider_Impl::InternetProxyDecider_Impl(
+    const uno::Reference< uno::XComponentContext >& rxContext )
+    : m_nProxyType( ProxyType::NoProxy ),
+      m_aHostnames()
+{
+    try
+    {
+
+        // Read proxy configuration from config db.
+
+
+        uno::Reference< lang::XMultiServiceFactory > xConfigProv =
+                configuration::theDefaultProvider::get( rxContext );
+
+        uno::Sequence< uno::Any > aArguments{ uno::Any(OUString( CONFIG_ROOT_KEY )) };
+        uno::Reference< uno::XInterface > xInterface(
+                    xConfigProv->createInstanceWithArguments(
+                        "com.sun.star.configuration.ConfigurationAccess",
+                        aArguments ) );
+
+        OSL_ENSURE( xInterface.is(),
+                    "InternetProxyDecider - No config access!" );
+
+        if ( xInterface.is() )
+        {
+            uno::Reference< container::XNameAccess > xNameAccess(
+                                            xInterface, uno::UNO_QUERY );
+            OSL_ENSURE( xNameAccess.is(),
+                        "InternetProxyDecider - No name access!" );
+
+            if ( xNameAccess.is() )
+            {
+                // *** Proxy type ***
+                sal_Int32 tmp = 0;
+                getConfigInt32Value(
+                    xNameAccess, PROXY_TYPE_KEY, tmp );
+                m_nProxyType = static_cast<ProxyType>(tmp);
+
+                // *** No proxy list ***
+                OUString aNoProxyList;
+                getConfigStringValue(
+                    xNameAccess, NO_PROXY_LIST_KEY, aNoProxyList );
+                setNoProxyList( aNoProxyList );
+
+                // *** HTTP ***
+                getConfigStringValue(
+                    xNameAccess, HTTP_PROXY_NAME_KEY, m_aHttpProxy.aName );
+
+                m_aHttpProxy.nPort = -1;
+                getConfigInt32Value(
+                    xNameAccess, HTTP_PROXY_PORT_KEY, m_aHttpProxy.nPort );
+                if ( m_aHttpProxy.nPort == -1 )
+                    m_aHttpProxy.nPort = 80; // standard HTTP port.
+
+                // *** HTTPS ***
+                getConfigStringValue(
+                    xNameAccess, HTTPS_PROXY_NAME_KEY, m_aHttpsProxy.aName );
+
+                m_aHttpsProxy.nPort = -1;
+                getConfigInt32Value(
+                    xNameAccess, HTTPS_PROXY_PORT_KEY, m_aHttpsProxy.nPort );
+                if ( m_aHttpsProxy.nPort == -1 )
+                    m_aHttpsProxy.nPort = 443; // standard HTTPS port.
+
+                // *** FTP ***
+                getConfigStringValue(
+                    xNameAccess, FTP_PROXY_NAME_KEY, m_aFtpProxy.aName );
+
+                m_aFtpProxy.nPort = -1;
+                getConfigInt32Value(
+                    xNameAccess, FTP_PROXY_PORT_KEY, m_aFtpProxy.nPort );
+            }
+
+            // Register as listener for config changes.
+
+            m_xNotifier.set( xInterface, uno::UNO_QUERY );
+
+            OSL_ENSURE( m_xNotifier.is(),
+                        "InternetProxyDecider - No notifier!" );
+
+            if ( m_xNotifier.is() )
+                m_xNotifier->addChangesListener( this );
+        }
+    }
+    catch ( uno::Exception const & )
+    {
+        // createInstance, createInstanceWithArguments
+        OSL_FAIL( "InternetProxyDecider - Exception!" );
+    }
+}
+
+void InternetProxyDecider_Impl::dispose()
+{
+    uno::Reference< util::XChangesNotifier > xNotifier;
+
+    if ( m_xNotifier.is() )
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        if ( m_xNotifier.is() )
+        {
+            xNotifier = m_xNotifier;
+            m_xNotifier.clear();
+        }
+    }
+
+    // Do this unguarded!
+    if ( xNotifier.is() )
+        xNotifier->removeChangesListener( this );
+}
+
+
+bool InternetProxyDecider_Impl::shouldUseProxy( std::u16string_view rHost,
+                                                sal_Int32 nPort,
+                                                bool bUseFullyQualified ) const
+{
+    OUStringBuffer aBuffer;
+
+    if ( ( rHost.find( ':' ) != std::u16string_view::npos ) &&
+         ( rHost[ 0 ] != '[' ) )
+    {
+        // host is given as numeric IPv6 address
+        aBuffer.append( "[" );
+        aBuffer.append( rHost );
+        aBuffer.append( "]" );
+    }
+    else
+    {
+        // host is given either as numeric IPv4 address or non-numeric hostname
+        aBuffer.append( rHost );
+    }
+
+    aBuffer.append( ':' );
+    aBuffer.append( nPort );
+    const OUString aHostAndPort( aBuffer.makeStringAndClear() );
+
+    for (auto const& noProxy : m_aNoProxyList)
+    {
+        if ( bUseFullyQualified )
+        {
+            if ( noProxy.second.Matches( aHostAndPort ) )
+                return false;
+        }
+        else
+        {
+            if ( noProxy.first.Matches( aHostAndPort ) )
+                return false;
+        }
+    }
+
+    return true;
+}
+
+namespace
+{
+#ifdef _WIN32
+struct GetPACProxyData
+{
+    const OUString& m_rProtocol;
+    const OUString& m_rHost;
+    sal_Int32 m_nPort;
+    bool m_bAutoDetect = false;
+    OUString m_sAutoConfigUrl;
+    InternetProxyServer m_ProxyServer;
+
+    GetPACProxyData(const OUString& rProtocol, const OUString& rHost, sal_Int32 nPort)
+        : m_rProtocol(rProtocol)
+        , m_rHost(rHost)
+        , m_nPort(nPort)
+    {
+    }
+};
+
+// Tries to get proxy configuration using WinHttpGetProxyForUrl, which supports Web Proxy Auto-Discovery
+// (WPAD) protocol and manually configured address to get Proxy Auto-Configuration (PAC) file.
+// The WinINet/WinHTTP functions cannot correctly run in a STA COM thread, so use a dedicated thread
+DWORD WINAPI GetPACProxyThread(_In_ LPVOID lpParameter)
+{
+    assert(lpParameter);
+    GetPACProxyData* pData = static_cast<GetPACProxyData*>(lpParameter);
+
+    OUString url(pData->m_rProtocol + "://" + pData->m_rHost + ":"
+                 + OUString::number(pData->m_nPort));
+
+    HINTERNET hInternet = WinHttpOpen(L"Mozilla 5.0", WINHTTP_ACCESS_TYPE_NO_PROXY,
+                                      WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
+    DWORD nError = GetLastError();
+    if (!hInternet)
+        return nError;
+
+    WINHTTP_AUTOPROXY_OPTIONS AutoProxyOptions{};
+    if (pData->m_bAutoDetect)
+    {
+        AutoProxyOptions.dwFlags = WINHTTP_AUTOPROXY_AUTO_DETECT;
+        AutoProxyOptions.dwAutoDetectFlags
+            = WINHTTP_AUTO_DETECT_TYPE_DHCP | WINHTTP_AUTO_DETECT_TYPE_DNS_A;
+    }
+    if (!pData->m_sAutoConfigUrl.isEmpty())
+    {
+        AutoProxyOptions.dwFlags |= WINHTTP_AUTOPROXY_CONFIG_URL;
+        AutoProxyOptions.lpszAutoConfigUrl = o3tl::toW(pData->m_sAutoConfigUrl.getStr());
+    }
+    // First, try without autologon. According to
+    // https://github.com/Microsoft/Windows-classic-samples/blob/master/Samples/Win7Samples/web/winhttp/WinhttpProxySample/GetProxy.cpp
+    // autologon prevents caching, and so causes repetitive network traffic.
+    AutoProxyOptions.fAutoLogonIfChallenged = FALSE;
+    WINHTTP_PROXY_INFO ProxyInfo{};
+    bool bResult
+        = WinHttpGetProxyForUrl(hInternet, o3tl::toW(url.getStr()), &AutoProxyOptions, &ProxyInfo);
+    nError = GetLastError();
+    if (!bResult && nError == ERROR_WINHTTP_LOGIN_FAILURE)
+    {
+        AutoProxyOptions.fAutoLogonIfChallenged = TRUE;
+        bResult = WinHttpGetProxyForUrl(hInternet, o3tl::toW(url.getStr()),
+                                        &AutoProxyOptions, &ProxyInfo);
+        nError = GetLastError();
+    }
+    WinHttpCloseHandle(hInternet);
+    if (bResult)
+    {
+        if (ProxyInfo.lpszProxyBypass)
+            GlobalFree(ProxyInfo.lpszProxyBypass);
+        if (ProxyInfo.lpszProxy)
+        {
+            OUString sProxyResult(o3tl::toU(ProxyInfo.lpszProxy));
+            GlobalFree(ProxyInfo.lpszProxy);
+            // Get the first of possibly multiple results
+            sProxyResult = sProxyResult.getToken(0, ';');
+            sal_Int32 nPortSepPos = sProxyResult.indexOf(':');
+            if (nPortSepPos != -1)
+            {
+                pData->m_ProxyServer.nPort = o3tl::toInt32(sProxyResult.subView(nPortSepPos + 1));
+                sProxyResult = sProxyResult.copy(0, nPortSepPos);
+            }
+            else
+            {
+                pData->m_ProxyServer.nPort = 0;
+            }
+            pData->m_ProxyServer.aName = sProxyResult;
+        }
+    }
+
+    return nError;
+}
+
+InternetProxyServer GetPACProxy(const OUString& rProtocol, const OUString& rHost, sal_Int32 nPort)
+{
+    GetPACProxyData aData(rProtocol, rHost, nPort);
+
+    // WinHTTP only supports http(s), so don't try for other protocols
+    if (!(rProtocol.equalsIgnoreAsciiCase("http") || rProtocol.equalsIgnoreAsciiCase("https")))
+        return aData.m_ProxyServer;
+
+    // Only try to get configuration from PAC (with all the overhead, including new thread)
+    // if configured to do so
+    {
+        WINHTTP_CURRENT_USER_IE_PROXY_CONFIG aProxyConfig{};
+        bool bResult = WinHttpGetIEProxyConfigForCurrentUser(&aProxyConfig);
+        if (aProxyConfig.lpszProxy)
+            GlobalFree(aProxyConfig.lpszProxy);
+        if (aProxyConfig.lpszProxyBypass)
+            GlobalFree(aProxyConfig.lpszProxyBypass);
+        // Don't try WPAD if AutoDetection or AutoConfig script URL are not configured
+        if (!bResult || !(aProxyConfig.fAutoDetect || aProxyConfig.lpszAutoConfigUrl))
+            return aData.m_ProxyServer;
+        aData.m_bAutoDetect = aProxyConfig.fAutoDetect;
+        if (aProxyConfig.lpszAutoConfigUrl)
+        {
+            aData.m_sAutoConfigUrl = o3tl::toU(aProxyConfig.lpszAutoConfigUrl);
+            GlobalFree(aProxyConfig.lpszAutoConfigUrl);
+        }
+    }
+
+    HANDLE hThread = CreateThread(nullptr, 0, GetPACProxyThread, &aData, 0, nullptr);
+    if (hThread)
+    {
+        WaitForSingleObject(hThread, INFINITE);
+        CloseHandle(hThread);
+    }
+    return aData.m_ProxyServer;
+}
+
+#else // .. _WIN32
+
+// Read the settings from the OS which are stored in env vars
+//
+InternetProxyServer GetUnixSystemProxy(const OUString & rProtocol)
+{
+    // TODO this could be improved to read the "no_proxy" env variable
+    InternetProxyServer aProxy;
+    OUString protocolLower = rProtocol.toAsciiLowerCase() + "_proxy";
+    OString protocolLowerStr = OUStringToOString( protocolLower, RTL_TEXTENCODING_ASCII_US );
+    const char* pEnvProxy = getenv(protocolLowerStr.getStr());
+    if (!pEnvProxy)
+        return aProxy;
+    // expecting something like "https://example.ct:80"
+    OUString tmp = OUString::createFromAscii(pEnvProxy);
+    if (tmp.getLength() < (rProtocol.getLength() + 3))
+        return aProxy;
+    tmp = tmp.copy(rProtocol.getLength() + 3);
+    sal_Int32 x = tmp.indexOf(':');
+    if (x == -1)
+        return aProxy;
+    int nPort = o3tl::toInt32(tmp.subView(x + 1));
+    if (nPort == 0)
+        return aProxy;
+    aProxy.aName = tmp.copy(0, x);
+    aProxy.nPort = nPort;
+    return aProxy;
+}
+
+#endif // else .. _WIN32
+}
+
+InternetProxyServer InternetProxyDecider_Impl::getProxy(
+                                            const OUString & rProtocol,
+                                            const OUString & rHost,
+                                            sal_Int32 nPort ) const
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( m_nProxyType == ProxyType::NoProxy )
+    {
+        // Never use proxy.
+        return m_aEmptyProxy;
+    }
+
+    // If get from system
+    if (m_nProxyType == ProxyType::Automatic && !rHost.isEmpty())
+    {
+#ifdef _WIN32
+        InternetProxyServer aProxy(GetPACProxy(rProtocol, rHost, nPort));
+#else
+        InternetProxyServer aProxy(GetUnixSystemProxy(rProtocol));
+#endif // _WIN32
+        if (!aProxy.aName.isEmpty())
+            return aProxy;
+    }
+
+    if ( !rHost.isEmpty() && !m_aNoProxyList.empty() )
+    {
+
+        // First, try direct hostname match - #110515#
+
+
+        if ( !shouldUseProxy( rHost, nPort, false ) )
+            return m_aEmptyProxy;
+
+
+        // Second, try match against full qualified hostname - #104401#
+
+
+        OUString aHost;
+
+        if ( ( rHost.getLength() > 1 ) &&
+             ( rHost[ 0 ] == '[' ))
+        {
+            // host is given as numeric IPv6 address. name resolution
+            // functions need hostname without square brackets.
+            aHost = rHost.copy( 1, rHost.getLength() - 2 );
+        }
+        else
+        {
+            aHost = rHost;
+        }
+
+        OUString aFullyQualifiedHost;
+        if ( !m_aHostnames.get( aHost, aFullyQualifiedHost ) )
+        {
+            // This might be quite expensive (DNS lookup).
+            const osl::SocketAddr aAddr( aHost, nPort );
+            aFullyQualifiedHost = aAddr.getHostname().toAsciiLowerCase();
+            m_aHostnames.put( aHost, aFullyQualifiedHost );
+        }
+
+        // Error resolving name? -> fallback.
+        if ( aFullyQualifiedHost.isEmpty() )
+            aFullyQualifiedHost = aHost;
+
+        if ( aFullyQualifiedHost != aHost )
+        {
+            if ( !shouldUseProxy( aFullyQualifiedHost, nPort, false ) )
+                return m_aEmptyProxy;
+        }
+
+
+        // Third, try match of fully qualified entries in no-proxy list
+        // against full qualified hostname
+
+        // Example:
+        // list: staroffice-doc -> full: xyz.germany.sun.com
+        // in:   staroffice-doc.germany.sun.com -> full: xyz.germany.sun.com
+
+
+        if ( !shouldUseProxy( aFullyQualifiedHost, nPort, true ) )
+            return m_aEmptyProxy;
+    }
+
+    if ( rProtocol.toAsciiLowerCase() == "ftp" )
+    {
+        if ( !m_aFtpProxy.aName.isEmpty() && m_aFtpProxy.nPort >= 0 )
+            return m_aFtpProxy;
+    }
+    else if ( rProtocol.toAsciiLowerCase() == "https" )
+    {
+        if ( !m_aHttpsProxy.aName.isEmpty() )
+            return m_aHttpsProxy;
+    }
+    else if ( !m_aHttpProxy.aName.isEmpty() )
+    {
+        // All other protocols use the HTTP proxy.
+        return m_aHttpProxy;
+    }
+    return m_aEmptyProxy;
+}
+
+// virtual
+void SAL_CALL InternetProxyDecider_Impl::changesOccurred(
+                                        const util::ChangesEvent& Event )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    for ( const util::ElementChange& rElem : Event.Changes )
+    {
+        OUString aKey;
+        if ( ( rElem.Accessor >>= aKey ) && !aKey.isEmpty() )
+        {
+            if ( aKey == PROXY_TYPE_KEY )
+            {
+                sal_Int32 tmp;
+                if ( !( rElem.Element >>= tmp ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+                else
+                    m_nProxyType = static_cast<ProxyType>(tmp);
+            }
+            else if ( aKey == NO_PROXY_LIST_KEY )
+            {
+                OUString aNoProxyList;
+                if ( !( rElem.Element >>= aNoProxyList ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+
+                setNoProxyList( aNoProxyList );
+            }
+            else if ( aKey == HTTP_PROXY_NAME_KEY )
+            {
+                if ( !( rElem.Element >>= m_aHttpProxy.aName ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+            }
+            else if ( aKey == HTTP_PROXY_PORT_KEY )
+            {
+                if ( !( rElem.Element >>= m_aHttpProxy.nPort ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+
+                if ( m_aHttpProxy.nPort == -1 )
+                    m_aHttpProxy.nPort = 80; // standard HTTP port.
+            }
+            else if ( aKey == HTTPS_PROXY_NAME_KEY )
+            {
+                if ( !( rElem.Element >>= m_aHttpsProxy.aName ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+            }
+            else if ( aKey == HTTPS_PROXY_PORT_KEY )
+            {
+                if ( !( rElem.Element >>= m_aHttpsProxy.nPort ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+
+                if ( m_aHttpsProxy.nPort == -1 )
+                    m_aHttpsProxy.nPort = 443; // standard HTTPS port.
+            }
+            else if ( aKey == FTP_PROXY_NAME_KEY )
+            {
+                if ( !( rElem.Element >>= m_aFtpProxy.aName ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+            }
+            else if ( aKey == FTP_PROXY_PORT_KEY )
+            {
+                if ( !( rElem.Element >>= m_aFtpProxy.nPort ) )
+                {
+                    OSL_FAIL( "InternetProxyDecider - changesOccurred - "
+                                "Error getting config item value!" );
+                }
+            }
+        }
+    }
+}
+
+
+// virtual
+void SAL_CALL InternetProxyDecider_Impl::disposing(const lang::EventObject&)
+{
+    if ( m_xNotifier.is() )
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        if ( m_xNotifier.is() )
+            m_xNotifier.clear();
+    }
+}
+
+
+void InternetProxyDecider_Impl::setNoProxyList(
+                                        const OUString & rNoProxyList )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    m_aNoProxyList.clear();
+
+    if ( rNoProxyList.isEmpty() )
+        return;
+
+    // List of connection endpoints hostname[:port],
+    // separated by semicolon. Wildcards allowed.
+
+    sal_Int32 nPos = 0;
+    sal_Int32 nEnd = rNoProxyList.indexOf( ';' );
+    sal_Int32 nLen = rNoProxyList.getLength();
+
+    do
+    {
+        if ( nEnd == -1 )
+            nEnd = nLen;
+
+        OUString aToken = rNoProxyList.copy( nPos, nEnd - nPos );
+
+        if ( !aToken.isEmpty() )
+        {
+            OUString aServer;
+            OUString aPort;
+
+            // numerical IPv6 address?
+            bool bIPv6Address = false;
+            sal_Int32 nClosedBracketPos = aToken.indexOf( ']' );
+            if ( nClosedBracketPos == -1 )
+                nClosedBracketPos = 0;
+            else
+                bIPv6Address = true;
+
+            sal_Int32 nColonPos = aToken.indexOf( ':', nClosedBracketPos );
+            if ( nColonPos == -1 )
+            {
+                // No port given, server pattern equals current token
+                aPort = "*";
+                if ( aToken.indexOf( '*' ) == -1 )
+                {
+                    // pattern describes exactly one server
+                    aServer = aToken;
+                }
+
+                aToken += ":*";
+            }
+            else
+            {
+                // Port given, extract server pattern
+                sal_Int32 nAsteriskPos = aToken.indexOf( '*' );
+                aPort = aToken.copy( nColonPos + 1 );
+                if ( nAsteriskPos < nColonPos )
+                {
+                    // pattern describes exactly one server
+                    aServer = aToken.copy( 0, nColonPos );
+                }
+            }
+
+            OUStringBuffer aFullyQualifiedHost;
+            if ( !aServer.isEmpty() )
+            {
+                // Remember fully qualified server name if current list
+                // entry specifies exactly one non-fully qualified server
+                // name.
+
+                // remove square brackets from host name in case it's
+                // a numerical IPv6 address.
+                if ( bIPv6Address )
+                    aServer = aServer.copy( 1, aServer.getLength() - 2 );
+
+                // This might be quite expensive (DNS lookup).
+                const osl::SocketAddr aAddr( aServer, 0 );
+                OUString aTmp = aAddr.getHostname().toAsciiLowerCase();
+                if ( aTmp != aServer.toAsciiLowerCase() )
+                {
+                    if ( bIPv6Address )
+                    {
+                        aFullyQualifiedHost.append( "[" );
+                        aFullyQualifiedHost.append( aTmp );
+                        aFullyQualifiedHost.append( "]" );
+                    }
+                    else
+                    {
+                        aFullyQualifiedHost.append( aTmp );
+                    }
+                    aFullyQualifiedHost.append( ":" );
+                    aFullyQualifiedHost.append( aPort );
+                }
+            }
+
+            m_aNoProxyList.emplace_back( WildCard( aToken ),
+                                  WildCard( aFullyQualifiedHost ) );
+        }
+
+        if ( nEnd != nLen )
+        {
+            nPos = nEnd + 1;
+            nEnd = rNoProxyList.indexOf( ';', nPos );
+        }
+    }
+    while ( nEnd != nLen );
+}
+
+} // namespace proxydecider_impl
+
+
+// InternetProxyDecider Implementation.
+
+
+InternetProxyDecider::InternetProxyDecider(
+    const uno::Reference< uno::XComponentContext>& rxContext )
+: m_xImpl( new proxydecider_impl::InternetProxyDecider_Impl( rxContext ) )
+{
+}
+
+
+InternetProxyDecider::~InternetProxyDecider()
+{
+    // Break circular reference between config listener and notifier.
+    m_xImpl->dispose();
+}
+
+
+bool InternetProxyDecider::shouldUseProxy( const OUString & rProtocol,
+                                           const OUString & rHost,
+                                           sal_Int32 nPort ) const
+{
+    const InternetProxyServer & rData = m_xImpl->getProxy( rProtocol,
+                                                           rHost,
+                                                           nPort );
+    return !rData.aName.isEmpty();
+}
+
+
+InternetProxyServer InternetProxyDecider::getProxy(
+                                            const OUString & rProtocol,
+                                            const OUString & rHost,
+                                            sal_Int32 nPort ) const
+{
+    return m_xImpl->getProxy( rProtocol, rHost, nPort );
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/authenticationfallback.cxx b/ucbhelper/source/provider/authenticationfallback.cxx
new file mode 100644
index 000000000..04491520b
--- /dev/null
+++ b/ucbhelper/source/provider/authenticationfallback.cxx
@@ -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/.
+ */
+
+#include <ucbhelper/authenticationfallback.hxx>
+#include <com/sun/star/ucb/AuthenticationFallbackRequest.hpp>
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+AuthenticationFallbackRequest::AuthenticationFallbackRequest(
+                                      const OUString & rInstructions,
+                                      const OUString & rURL )
+{
+
+    ucb::AuthenticationFallbackRequest aRequest;
+    aRequest.instructions = rInstructions;
+    aRequest.url = rURL;
+
+    setRequest( uno::Any( aRequest ) );
+    m_xAuthFallback = new InteractionAuthFallback( this );
+
+    setContinuations({ new InteractionAbort(this), m_xAuthFallback });
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/cancelcommandexecution.cxx b/ucbhelper/source/provider/cancelcommandexecution.cxx
new file mode 100644
index 000000000..90c0168c6
--- /dev/null
+++ b/ucbhelper/source/provider/cancelcommandexecution.cxx
@@ -0,0 +1,125 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include <osl/diagnose.h>
+#include <rtl/ref.hxx>
+#include <cppuhelper/exc_hlp.hxx>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
+#include <com/sun/star/ucb/XCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XCommandProcessor.hpp>
+#include <ucbhelper/interactionrequest.hxx>
+#include <ucbhelper/cancelcommandexecution.hxx>
+#include "simpleioerrorrequest.hxx"
+
+using namespace com::sun::star;
+
+namespace ucbhelper
+{
+
+
+void cancelCommandExecution( const uno::Any & rException,
+                             const uno::Reference<
+                                        ucb::XCommandEnvironment > & xEnv )
+{
+    if ( xEnv.is() )
+    {
+        uno::Reference<
+            task::XInteractionHandler > xIH = xEnv->getInteractionHandler();
+        if ( xIH.is() )
+        {
+            rtl::Reference< ucbhelper::InteractionRequest > xRequest
+                = new ucbhelper::InteractionRequest( rException );
+
+            xRequest->setContinuations({ new ucbhelper::InteractionAbort(xRequest.get()) });
+
+            xIH->handle( xRequest );
+
+            rtl::Reference< ucbhelper::InteractionContinuation > xSelection
+                = xRequest->getSelection();
+
+            if ( xSelection.is() )
+                throw ucb::CommandFailedException(
+                                    OUString(),
+                                    uno::Reference< uno::XInterface >(),
+                                    rException );
+        }
+    }
+
+    cppu::throwException( rException );
+    OSL_FAIL( "Return from cppu::throwException call!!!" );
+    throw uno::RuntimeException();
+}
+
+
+void cancelCommandExecution( const ucb::IOErrorCode eError,
+                             const uno::Sequence< uno::Any > & rArgs,
+                             const uno::Reference<
+                                ucb::XCommandEnvironment > & xEnv,
+                             const OUString & rMessage,
+                             const uno::Reference<
+                                    ucb::XCommandProcessor > & xContext )
+{
+    if ( !xEnv )
+    {
+        // Fast path
+
+        ucb::InteractiveAugmentedIOException aRequest;
+        aRequest.Message         = rMessage;
+        aRequest.Context         = xContext;
+        aRequest.Classification  = task::InteractionClassification_ERROR;
+        aRequest.Code            = eError;
+        aRequest.Arguments       = rArgs;
+        cppu::throwException( uno::Any( aRequest ) );
+    }
+    else
+    {
+        rtl::Reference< ucbhelper::SimpleIOErrorRequest > xRequest
+            = new ucbhelper::SimpleIOErrorRequest(
+                                        eError, rArgs, rMessage, xContext );
+        uno::Reference<
+            task::XInteractionHandler > xIH = xEnv->getInteractionHandler();
+        if ( xIH.is() )
+        {
+            xIH->handle( xRequest );
+
+            rtl::Reference< ucbhelper::InteractionContinuation > xSelection
+                = xRequest->getSelection();
+
+            if ( xSelection.is() )
+                throw ucb::CommandFailedException( OUString(),
+                                                   xContext,
+                                                   xRequest->getRequest() );
+        }
+        cppu::throwException( xRequest->getRequest() );
+    }
+
+    OSL_FAIL( "Return from cppu::throwException call!!!" );
+    throw uno::RuntimeException();
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/contenthelper.cxx b/ucbhelper/source/provider/contenthelper.cxx
new file mode 100644
index 000000000..75d0a8479
--- /dev/null
+++ b/ucbhelper/source/provider/contenthelper.cxx
@@ -0,0 +1,862 @@
+/* -*- 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/lang/NoSupportException.hpp>
+#include <com/sun/star/ucb/ContentAction.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/ucb/XPersistentPropertySet.hpp>
+#include <com/sun/star/beans/IllegalTypeException.hpp>
+#include <com/sun/star/beans/NotRemoveableException.hpp>
+#include <com/sun/star/beans/PropertyAttribute.hpp>
+#include <com/sun/star/beans/PropertyExistException.hpp>
+#include <com/sun/star/beans/PropertySetInfoChange.hpp>
+#include <comphelper/interfacecontainer3.hxx>
+#include <cppuhelper/interfacecontainer.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <ucbhelper/contenthelper.hxx>
+#include <ucbhelper/contentidentifier.hxx>
+#include "contentinfo.hxx"
+#include <ucbhelper/providerhelper.hxx>
+#include <ucbhelper/macros.hxx>
+
+#include <osl/diagnose.h>
+#include <osl/mutex.hxx>
+#include <rtl/ref.hxx>
+
+#include <unordered_map>
+
+using namespace com::sun::star;
+
+namespace ucbhelper_impl
+{
+
+namespace {
+
+class PropertyEventSequence
+{
+    uno::Sequence< beans::PropertyChangeEvent > m_aSeq;
+    sal_uInt32                                  m_nPos;
+
+public:
+    explicit PropertyEventSequence( sal_uInt32 nSize )
+    : m_aSeq( nSize ), m_nPos( 0 ) {};
+
+    void append( const beans::PropertyChangeEvent& rEvt )
+    { m_aSeq.getArray()[ m_nPos ] = rEvt; ++m_nPos; }
+
+    const uno::Sequence< beans::PropertyChangeEvent >& getEvents()
+    { m_aSeq.realloc( m_nPos ); return m_aSeq; }
+};
+
+}
+
+typedef void* XPropertiesChangeListenerPtr; // -> Compiler problems!
+
+namespace {
+
+struct equalPtr
+{
+    bool operator()( const XPropertiesChangeListenerPtr& rp1,
+                     const XPropertiesChangeListenerPtr& rp2 ) const
+    {
+        return ( rp1 == rp2 );
+    }
+};
+
+struct hashPtr
+{
+    size_t operator()( const XPropertiesChangeListenerPtr& rp ) const
+    {
+        return reinterpret_cast<size_t>(rp);
+    }
+};
+
+}
+
+typedef std::unordered_map
+<
+    XPropertiesChangeListenerPtr,
+    PropertyEventSequence,
+    hashPtr,
+    equalPtr
+>
+PropertiesEventListenerMap;
+
+typedef cppu::OMultiTypeInterfaceContainerHelperVar<OUString>
+    PropertyChangeListeners;
+
+struct ContentImplHelper_Impl
+{
+    rtl::Reference< ::ucbhelper::PropertySetInfo >      m_xPropSetInfo;
+    rtl::Reference< ::ucbhelper::CommandProcessorInfo > m_xCommandsInfo;
+    std::unique_ptr<cppu::OInterfaceContainerHelper>    m_pDisposeEventListeners;
+    std::unique_ptr<comphelper::OInterfaceContainerHelper3<css::ucb::XContentEventListener>>
+                                                        m_pContentEventListeners;
+    std::unique_ptr<comphelper::OInterfaceContainerHelper3<beans::XPropertySetInfoChangeListener>>
+                                                        m_pPropSetChangeListeners;
+    std::unique_ptr<cppu::OInterfaceContainerHelper>    m_pCommandChangeListeners;
+    std::unique_ptr<PropertyChangeListeners>            m_pPropertyChangeListeners;
+};
+
+} // namespace ucbhelper_impl
+
+using namespace ucbhelper_impl;
+
+namespace ucbhelper {
+
+ContentImplHelper::ContentImplHelper(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            const rtl::Reference< ContentProviderImplHelper >& rxProvider,
+            const uno::Reference<
+            css::ucb::XContentIdentifier >& Identifier )
+: m_pImpl( new ContentImplHelper_Impl ),
+  m_xContext( rxContext ),
+  m_xIdentifier( Identifier ),
+  m_xProvider( rxProvider ),
+  m_nCommandId( 0 )
+{
+}
+
+// virtual
+ContentImplHelper::~ContentImplHelper()
+{
+}
+
+void SAL_CALL ContentImplHelper::release()
+    noexcept
+{
+    // #144882# - Call to OWeakObject::release may destroy m_xProvider.
+    //            Prevent this.
+    rtl::Reference< ContentProviderImplHelper > xKeepProviderAlive(
+        m_xProvider );
+
+    osl::MutexGuard aGuard( m_xProvider->m_aMutex );
+    OWeakObject::release();
+}
+
+uno::Any SAL_CALL ContentImplHelper::queryInterface( const uno::Type & rType )
+{
+    css::uno::Any aRet = cppu::queryInterface( rType,
+            static_cast< lang::XTypeProvider * >(this),
+            static_cast< lang::XServiceInfo * >(this),
+            static_cast< lang::XComponent * >(this),
+            static_cast< css::ucb::XContent * >(this),
+            static_cast< css::ucb::XCommandProcessor * >(this),
+            static_cast< beans::XPropertiesChangeNotifier * >(this),
+            static_cast< css::ucb::XCommandInfoChangeNotifier * >(this),
+            static_cast< beans::XPropertyContainer * >(this),
+            static_cast< beans::XPropertySetInfoChangeNotifier * >(this),
+            static_cast< container::XChild * >(this));
+    return aRet.hasValue() ? aRet : cppu::OWeakObject::queryInterface( rType );
+}
+
+XTYPEPROVIDER_IMPL_10( ContentImplHelper,
+                       lang::XTypeProvider,
+                       lang::XServiceInfo,
+                       lang::XComponent,
+                       css::ucb::XContent,
+                       css::ucb::XCommandProcessor,
+                       beans::XPropertiesChangeNotifier,
+                       css::ucb::XCommandInfoChangeNotifier,
+                       beans::XPropertyContainer,
+                       beans::XPropertySetInfoChangeNotifier,
+                       container::XChild );
+
+// virtual
+sal_Bool SAL_CALL ContentImplHelper::supportsService(
+                                            const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::dispose()
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_pImpl->m_pDisposeEventListeners &&
+         m_pImpl->m_pDisposeEventListeners->getLength() )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source = static_cast< lang::XComponent * >( this );
+        m_pImpl->m_pDisposeEventListeners->disposeAndClear( aEvt );
+    }
+
+    if ( m_pImpl->m_pContentEventListeners &&
+         m_pImpl->m_pContentEventListeners->getLength() )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source = static_cast< css::ucb::XContent * >( this );
+        m_pImpl->m_pContentEventListeners->disposeAndClear( aEvt );
+    }
+
+    if ( m_pImpl->m_pPropSetChangeListeners &&
+         m_pImpl->m_pPropSetChangeListeners->getLength() )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source
+            = static_cast< beans::XPropertySetInfoChangeNotifier * >( this );
+        m_pImpl->m_pPropSetChangeListeners->disposeAndClear( aEvt );
+    }
+
+    if ( m_pImpl->m_pCommandChangeListeners &&
+         m_pImpl->m_pCommandChangeListeners->getLength() )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source = static_cast<  css::ucb::XCommandInfoChangeNotifier * >( this );
+        m_pImpl->m_pCommandChangeListeners->disposeAndClear( aEvt );
+    }
+
+    if ( m_pImpl->m_pPropertyChangeListeners )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source
+            = static_cast< beans::XPropertiesChangeNotifier * >( this );
+        m_pImpl->m_pPropertyChangeListeners->disposeAndClear( aEvt );
+    }
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::addEventListener(
+        const uno::Reference< lang::XEventListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_pDisposeEventListeners )
+        m_pImpl->m_pDisposeEventListeners.reset(
+            new cppu::OInterfaceContainerHelper( m_aMutex ));
+
+    m_pImpl->m_pDisposeEventListeners->addInterface( Listener );
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::removeEventListener(
+        const uno::Reference< lang::XEventListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_pImpl->m_pDisposeEventListeners )
+        m_pImpl->m_pDisposeEventListeners->removeInterface( Listener );
+}
+
+// virtual
+uno::Reference< css::ucb::XContentIdentifier > SAL_CALL
+ContentImplHelper::getIdentifier()
+{
+    return m_xIdentifier;
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::addContentEventListener(
+        const uno::Reference< css::ucb::XContentEventListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_pContentEventListeners )
+        m_pImpl->m_pContentEventListeners.reset(
+            new comphelper::OInterfaceContainerHelper3<css::ucb::XContentEventListener>( m_aMutex ));
+
+    m_pImpl->m_pContentEventListeners->addInterface( Listener );
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::removeContentEventListener(
+        const uno::Reference< css::ucb::XContentEventListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_pImpl->m_pContentEventListeners )
+        m_pImpl->m_pContentEventListeners->removeInterface( Listener );
+}
+
+// virtual
+sal_Int32 SAL_CALL ContentImplHelper::createCommandIdentifier()
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    // Just increase counter on every call to generate an identifier.
+    return ++m_nCommandId;
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::addPropertiesChangeListener(
+        const uno::Sequence< OUString >& PropertyNames,
+        const uno::Reference< beans::XPropertiesChangeListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        m_pImpl->m_pPropertyChangeListeners.reset(
+            new PropertyChangeListeners( m_aMutex ));
+
+    if ( !PropertyNames.hasElements() )
+    {
+        // Note: An empty sequence means a listener for "all" properties.
+        m_pImpl->m_pPropertyChangeListeners->addInterface(
+            OUString(), Listener );
+    }
+    else
+    {
+        for ( const OUString& rName : PropertyNames )
+        {
+            if ( !rName.isEmpty() )
+                m_pImpl->m_pPropertyChangeListeners->addInterface(
+                    rName, Listener );
+        }
+    }
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::removePropertiesChangeListener(
+        const uno::Sequence< OUString >& PropertyNames,
+        const uno::Reference< beans::XPropertiesChangeListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        return;
+
+    if ( !PropertyNames.hasElements() )
+    {
+        // Note: An empty sequence means a listener for "all" properties.
+        m_pImpl->m_pPropertyChangeListeners->removeInterface(
+            OUString(), Listener );
+    }
+    else
+    {
+        for ( const OUString& rName : PropertyNames )
+        {
+            if ( !rName.isEmpty() )
+                m_pImpl->m_pPropertyChangeListeners->removeInterface(
+                    rName, Listener );
+        }
+    }
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::addCommandInfoChangeListener(
+        const uno::Reference< css::ucb::XCommandInfoChangeListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_pCommandChangeListeners )
+        m_pImpl->m_pCommandChangeListeners.reset(
+            new cppu::OInterfaceContainerHelper( m_aMutex ));
+
+    m_pImpl->m_pCommandChangeListeners->addInterface( Listener );
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::removeCommandInfoChangeListener(
+        const uno::Reference< css::ucb::XCommandInfoChangeListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_pImpl->m_pCommandChangeListeners )
+        m_pImpl->m_pCommandChangeListeners->removeInterface( Listener );
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::addProperty(
+        const OUString& Name,
+        sal_Int16 Attributes,
+        const uno::Any& DefaultValue )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    // Make sure a property with the requested name does not already
+    // exist in dynamic and static(!) properties.
+
+    // @@@ Need real command environment here, but where to get it from?
+    //     XPropertyContainer interface should be replaced by
+    //     XCommandProcessor commands!
+    uno::Reference< css::ucb::XCommandEnvironment > xEnv;
+
+    if ( getPropertySetInfo( xEnv )->hasPropertyByName( Name ) )
+    {
+        // Property does already exist.
+        throw beans::PropertyExistException();
+    }
+
+    // Add a new dynamic property.
+    // Open/create persistent property set.
+    uno::Reference< css::ucb::XPersistentPropertySet > xSet(
+                                    getAdditionalPropertySet( true ) );
+
+    OSL_ENSURE( xSet.is(),
+                "ContentImplHelper::addProperty - No property set!" );
+
+    if ( !xSet.is() )
+        return;
+
+    uno::Reference< beans::XPropertyContainer > xContainer(
+        xSet, uno::UNO_QUERY );
+
+    OSL_ENSURE(
+        xContainer.is(),
+        "ContentImplHelper::addProperty - No property container!" );
+
+    if ( !xContainer.is() )
+        return;
+
+    // Property is always removable.
+    Attributes |= beans::PropertyAttribute::REMOVABLE;
+
+    try
+    {
+        xContainer->addProperty( Name, Attributes, DefaultValue );
+    }
+    catch ( beans::PropertyExistException const & )
+    {
+        OSL_FAIL( "ContentImplHelper::addProperty - Exists!" );
+        throw;
+    }
+    catch ( beans::IllegalTypeException const & )
+    {
+        OSL_FAIL( "ContentImplHelper::addProperty - Wrong Type!" );
+        throw;
+    }
+    catch ( lang::IllegalArgumentException const & )
+    {
+        OSL_FAIL( "ContentImplHelper::addProperty - Illegal Arg!" );
+        throw;
+    }
+
+    // Success!
+
+    if ( m_pImpl->m_xPropSetInfo.is() )
+    {
+        // Info cached in propertyset info is invalid now!
+        m_pImpl->m_xPropSetInfo->reset();
+    }
+
+    // Notify propertyset info change listeners.
+    if ( m_pImpl->m_pPropSetChangeListeners &&
+         m_pImpl->m_pPropSetChangeListeners->getLength() )
+    {
+        beans::PropertySetInfoChangeEvent evt(
+                    static_cast< cppu::OWeakObject * >( this ),
+                    Name,
+                    -1, // No handle available
+                    beans::PropertySetInfoChange::PROPERTY_INSERTED );
+        notifyPropertySetInfoChange( evt );
+    }
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::removeProperty( const OUString& Name )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    try
+    {
+        // @@@ Need real command environment here, but where to get it from?
+        //     XPropertyContainer interface should be replaced by
+        //     XCommandProcessor commands!
+        uno::Reference< css::ucb::XCommandEnvironment > xEnv;
+
+        beans::Property aProp
+            = getPropertySetInfo( xEnv )->getPropertyByName( Name );
+
+        if ( !( aProp.Attributes & beans::PropertyAttribute::REMOVABLE ) )
+        {
+            // Not removable!
+            throw beans::NotRemoveableException();
+        }
+    }
+    catch ( beans::UnknownPropertyException const & )
+    {
+        OSL_FAIL( "ContentImplHelper::removeProperty - Unknown!" );
+        throw;
+    }
+
+    // Try to remove property from dynamic property set.
+    // Open persistent property set, if exists.
+    uno::Reference< css::ucb::XPersistentPropertySet > xSet(
+        getAdditionalPropertySet( false ) );
+    if ( !xSet.is() )
+        return;
+
+    uno::Reference< beans::XPropertyContainer > xContainer(
+        xSet, uno::UNO_QUERY );
+
+    OSL_ENSURE(
+        xContainer.is(),
+        "ContentImplHelper::removeProperty - No property container!" );
+
+    if ( !xContainer.is() )
+        return;
+
+    try
+    {
+        xContainer->removeProperty( Name );
+    }
+    catch ( beans::UnknownPropertyException const & )
+    {
+        OSL_FAIL( "ContentImplHelper::removeProperty - Unknown!" );
+        throw;
+    }
+    catch ( beans::NotRemoveableException const & )
+    {
+        OSL_FAIL(
+            "ContentImplHelper::removeProperty - Unremovable!" );
+        throw;
+    }
+
+    xContainer = nullptr;
+
+    // Success!
+
+    if ( !xSet->getPropertySetInfo()->getProperties().hasElements() )
+    {
+        // Remove empty propertyset from registry.
+        uno::Reference< css::ucb::XPropertySetRegistry >
+            xReg = xSet->getRegistry();
+        if ( xReg.is() )
+        {
+            OUString aKey( xSet->getKey() );
+            xSet = nullptr;
+            xReg->removePropertySet( aKey );
+        }
+    }
+
+    if ( m_pImpl->m_xPropSetInfo.is() )
+    {
+        // Info cached in propertyset info is invalid now!
+        m_pImpl->m_xPropSetInfo->reset();
+    }
+
+    // Notify propertyset info change listeners.
+    if ( m_pImpl->m_pPropSetChangeListeners &&
+         m_pImpl->m_pPropSetChangeListeners->getLength() )
+    {
+        beans::PropertySetInfoChangeEvent evt(
+                    static_cast< cppu::OWeakObject * >( this ),
+                    Name,
+                    -1, // No handle available
+                    beans::PropertySetInfoChange::PROPERTY_REMOVED );
+        notifyPropertySetInfoChange( evt );
+    }
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::addPropertySetInfoChangeListener(
+        const uno::Reference< beans::XPropertySetInfoChangeListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_pPropSetChangeListeners )
+        m_pImpl->m_pPropSetChangeListeners.reset(
+            new comphelper::OInterfaceContainerHelper3<beans::XPropertySetInfoChangeListener>( m_aMutex ));
+
+    m_pImpl->m_pPropSetChangeListeners->addInterface( Listener );
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::removePropertySetInfoChangeListener(
+        const uno::Reference< beans::XPropertySetInfoChangeListener >& Listener )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_pImpl->m_pPropSetChangeListeners )
+        m_pImpl->m_pPropSetChangeListeners->removeInterface( Listener );
+}
+
+// virtual
+uno::Reference< uno::XInterface > SAL_CALL ContentImplHelper::getParent()
+{
+    uno::Reference< uno::XInterface > xParent;
+    OUString aURL = getParentURL();
+
+    if ( !aURL.isEmpty() )
+    {
+        uno::Reference< css::ucb::XContentIdentifier > xId(
+            new ContentIdentifier( aURL ) );
+        try
+        {
+            xParent.set( m_xProvider->queryContent( xId ) );
+        }
+        catch ( css::ucb::IllegalIdentifierException const & )
+        {
+        }
+    }
+
+    return xParent;
+}
+
+// virtual
+void SAL_CALL ContentImplHelper::setParent(
+                                    const uno::Reference< uno::XInterface >& )
+{
+    throw lang::NoSupportException();
+}
+
+uno::Reference< css::ucb::XPersistentPropertySet >
+ContentImplHelper::getAdditionalPropertySet( bool bCreate )
+{
+    // Get propertyset from provider.
+    return m_xProvider->getAdditionalPropertySet(
+                            m_xIdentifier->getContentIdentifier(), bCreate );
+}
+
+bool ContentImplHelper::renameAdditionalPropertySet(
+    const OUString& rOldKey,
+    const OUString& rNewKey )
+{
+    return m_xProvider->renameAdditionalPropertySet(
+                                            rOldKey, rNewKey, true/*bRecursive*/ );
+}
+
+bool ContentImplHelper::copyAdditionalPropertySet(
+    const OUString& rSourceKey,
+    const OUString& rTargetKey )
+{
+    return m_xProvider->copyAdditionalPropertySet(
+                                        rSourceKey, rTargetKey, true/*bRecursive*/ );
+}
+
+bool ContentImplHelper::removeAdditionalPropertySet()
+{
+    return m_xProvider->removeAdditionalPropertySet(
+                    m_xIdentifier->getContentIdentifier(), true/*bRecursive*/ );
+}
+
+void ContentImplHelper::notifyPropertiesChange(
+    const uno::Sequence< beans::PropertyChangeEvent >& evt ) const
+{
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        return;
+
+    sal_Int32 nCount = evt.getLength();
+    if ( !nCount )
+        return;
+
+    // First, notify listeners interested in changes of every property.
+    cppu::OInterfaceContainerHelper* pAllPropsContainer
+        = m_pImpl->m_pPropertyChangeListeners->getContainer(
+            OUString() );
+    if ( pAllPropsContainer )
+    {
+        cppu::OInterfaceIteratorHelper aIter( *pAllPropsContainer );
+        while ( aIter.hasMoreElements() )
+        {
+            // Propagate event.
+            static_cast< beans::XPropertiesChangeListener* >(
+                aIter.next())->propertiesChange( evt );
+        }
+    }
+
+    PropertiesEventListenerMap aListeners;
+
+    for ( const beans::PropertyChangeEvent& rEvent : evt )
+    {
+        const OUString& rName = rEvent.PropertyName;
+
+        cppu::OInterfaceContainerHelper* pPropsContainer
+            = m_pImpl->m_pPropertyChangeListeners->getContainer( rName );
+        if ( pPropsContainer )
+        {
+            cppu::OInterfaceIteratorHelper aIter( *pPropsContainer );
+            while ( aIter.hasMoreElements() )
+            {
+                PropertyEventSequence* p = nullptr;
+
+                beans::XPropertiesChangeListener* pListener =
+                    static_cast< beans::XPropertiesChangeListener * >(
+                                                        aIter.next() );
+                PropertiesEventListenerMap::iterator it =
+                        aListeners.find( pListener );
+                if ( it == aListeners.end() )
+                {
+                    // Not in map - create and insert new entry.
+                    p = &aListeners.emplace( pListener, PropertyEventSequence(nCount)).first->second;
+                }
+                else
+                    p = &it->second;
+
+                if ( p )
+                    p->append( rEvent );
+            }
+        }
+    }
+
+    // Notify listeners.
+    PropertiesEventListenerMap::iterator it = aListeners.begin();
+    while ( !aListeners.empty() )
+    {
+        beans::XPropertiesChangeListener* pListener =
+            static_cast< beans::XPropertiesChangeListener * >( (*it).first );
+        PropertyEventSequence pSeq = std::move(it->second);
+
+        // Remove current element.
+        aListeners.erase( it );
+
+        // Propagate event.
+        pListener->propertiesChange( pSeq.getEvents() );
+
+        it = aListeners.begin();
+    }
+}
+
+void ContentImplHelper::notifyPropertySetInfoChange(
+    const beans::PropertySetInfoChangeEvent& evt ) const
+{
+    if ( !m_pImpl->m_pPropSetChangeListeners )
+        return;
+
+    // Notify event listeners.
+    m_pImpl->m_pPropSetChangeListeners->notifyEach( &beans::XPropertySetInfoChangeListener::propertySetInfoChange, evt );
+}
+
+void ContentImplHelper::notifyContentEvent(
+    const css::ucb::ContentEvent& evt ) const
+{
+    if ( !m_pImpl->m_pContentEventListeners )
+        return;
+
+    // Notify event listeners.
+    m_pImpl->m_pContentEventListeners->notifyEach( &css::ucb::XContentEventListener::contentEvent, evt);
+}
+
+void ContentImplHelper::inserted()
+{
+    // Content is not yet registered at provider.
+    m_xProvider->registerNewContent( this );
+
+    // If the parent content is currently not instantiated, there can be
+    // no listeners interested in changes ;-)
+
+    rtl::Reference< ContentImplHelper > xParent
+                = m_xProvider->queryExistingContent( getParentURL() );
+
+    if ( xParent.is() )
+    {
+        css::ucb::ContentEvent aEvt(
+            static_cast< cppu::OWeakObject * >( xParent.get() ), // Source
+            css::ucb::ContentAction::INSERTED,        // Action
+            this,                                                // Content
+            xParent->getIdentifier() );                          // Id
+        xParent->notifyContentEvent( aEvt );
+    }
+}
+
+void ContentImplHelper::deleted()
+{
+    uno::Reference< css::ucb::XContent > xThis = this;
+
+    rtl::Reference< ContentImplHelper > xParent
+                    = m_xProvider->queryExistingContent( getParentURL() );
+
+    if ( xParent.is() )
+    {
+        // Let parent notify "REMOVED" event.
+        css::ucb::ContentEvent aEvt(
+            static_cast< cppu::OWeakObject * >( xParent.get() ),
+            css::ucb::ContentAction::REMOVED,
+            this,
+            xParent->getIdentifier()    );
+        xParent->notifyContentEvent( aEvt );
+    }
+
+    // Notify "DELETED" event.
+    css::ucb::ContentEvent aEvt1(
+        static_cast< cppu::OWeakObject * >( this ),
+        css::ucb::ContentAction::DELETED,
+        this,
+        getIdentifier() );
+    notifyContentEvent( aEvt1 );
+
+    m_xProvider->removeContent( this );
+}
+
+bool ContentImplHelper::exchange(
+    const uno::Reference< css::ucb::XContentIdentifier >& rNewId )
+{
+    uno::Reference< css::ucb::XContent > xThis = this;
+
+    osl::ClearableMutexGuard aGuard( m_aMutex );
+
+    rtl::Reference< ContentImplHelper > xContent
+        = m_xProvider->queryExistingContent( rNewId );
+    if ( xContent.is() )
+    {
+        // @@@
+        // Big trouble. Another object with the new identity exists.
+        // How shall I mutate to / merge with the other object?
+        return false;
+    }
+
+    uno::Reference< css::ucb::XContentIdentifier > xOldId
+        = getIdentifier();
+
+    // Re-insert at provider.
+    m_xProvider->removeContent( this );
+    m_xIdentifier = rNewId;
+    m_xProvider->registerNewContent( this );
+
+    aGuard.clear();
+
+    // Notify "EXCHANGED" event.
+    css::ucb::ContentEvent aEvt(
+        static_cast< cppu::OWeakObject * >( this ),
+        css::ucb::ContentAction::EXCHANGED,
+        this,
+        xOldId );
+    notifyContentEvent( aEvt );
+    return true;
+}
+
+uno::Reference< css::ucb::XCommandInfo >
+ContentImplHelper::getCommandInfo(
+    const uno::Reference< css::ucb::XCommandEnvironment > & xEnv,
+    bool bCache )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_xCommandsInfo.is() )
+        m_pImpl->m_xCommandsInfo
+            = new CommandProcessorInfo( xEnv, this );
+    else if ( !bCache )
+        m_pImpl->m_xCommandsInfo->reset();
+
+    return m_pImpl->m_xCommandsInfo;
+}
+
+uno::Reference< beans::XPropertySetInfo >
+ContentImplHelper::getPropertySetInfo(
+    const uno::Reference< css::ucb::XCommandEnvironment > & xEnv,
+    bool bCache )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_xPropSetInfo.is() )
+        m_pImpl->m_xPropSetInfo
+            = new PropertySetInfo( xEnv, this );
+    else if ( !bCache )
+        m_pImpl->m_xPropSetInfo->reset();
+
+    return m_pImpl->m_xPropSetInfo;
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/contentidentifier.cxx b/ucbhelper/source/provider/contentidentifier.cxx
new file mode 100644
index 000000000..d4c13b2c0
--- /dev/null
+++ b/ucbhelper/source/provider/contentidentifier.cxx
@@ -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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include <ucbhelper/contentidentifier.hxx>
+
+using namespace com::sun::star::uno;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::ucb;
+
+
+namespace ucbhelper
+{
+
+
+// struct ContentIdentifier_Impl.
+
+
+struct ContentIdentifier_Impl
+{
+    OUString                          m_aContentId;
+    OUString                          m_aProviderScheme;
+
+    explicit ContentIdentifier_Impl( const OUString& rURL );
+};
+
+
+// ContentIdentifier_Impl Implementation.
+
+
+ContentIdentifier_Impl::ContentIdentifier_Impl(const OUString& rURL )
+{
+    // Normalize URL scheme ( it's case insensitive ).
+
+    // The content provider scheme is the part before the first ':'
+    // within the content id.
+    sal_Int32 nPos = rURL.indexOf( ':' );
+    if ( nPos != -1 )
+    {
+        OUString aScheme( rURL.copy( 0, nPos ) );
+        m_aProviderScheme = aScheme.toAsciiLowerCase();
+        m_aContentId = rURL.replaceAt( 0, nPos, aScheme );
+    }
+}
+
+
+// ContentIdentifier Implementation.
+
+
+ContentIdentifier::ContentIdentifier( const OUString& rURL )
+    : m_pImpl( new ContentIdentifier_Impl( rURL ) )
+{
+}
+
+
+// virtual
+ContentIdentifier::~ContentIdentifier()
+{
+}
+
+
+// XContentIdentifier methods.
+
+
+// virtual
+OUString SAL_CALL ContentIdentifier::getContentIdentifier()
+{
+    return m_pImpl->m_aContentId;
+}
+
+
+// virtual
+OUString SAL_CALL ContentIdentifier::getContentProviderScheme()
+{
+    return m_pImpl->m_aProviderScheme;
+}
+
+} /* namespace ucbhelper */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/contentinfo.cxx b/ucbhelper/source/provider/contentinfo.cxx
new file mode 100644
index 000000000..b5ca80b79
--- /dev/null
+++ b/ucbhelper/source/provider/contentinfo.cxx
@@ -0,0 +1,322 @@
+/* -*- 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 .
+ */
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <com/sun/star/ucb/XPersistentPropertySet.hpp>
+#include <com/sun/star/ucb/XCommandInfo.hpp>
+
+#include <ucbhelper/contenthelper.hxx>
+#include "contentinfo.hxx"
+
+using namespace com::sun::star;
+
+
+// PropertySetInfo Implementation.
+
+
+namespace ucbhelper {
+
+PropertySetInfo::PropertySetInfo(
+    const uno::Reference< css::ucb::XCommandEnvironment >& rxEnv,
+    ContentImplHelper* pContent )
+: m_xEnv( rxEnv ),
+  m_pContent( pContent )
+{
+}
+
+
+// virtual
+PropertySetInfo::~PropertySetInfo()
+{
+}
+
+
+// XPropertySetInfo methods.
+
+
+// virtual
+uno::Sequence< beans::Property > SAL_CALL PropertySetInfo::getProperties()
+{
+    std::unique_lock aGuard( m_aMutex );
+    return getPropertiesImpl();
+}
+
+const uno::Sequence< beans::Property > & PropertySetInfo::getPropertiesImpl()
+{
+    if ( m_xProps )
+        return *m_xProps;
+
+    // Get info for core ( native) properties.
+
+    try
+    {
+        m_xProps = m_pContent->getProperties( m_xEnv );
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( uno::Exception const & )
+    {
+        m_xProps.emplace();
+    }
+
+    // Get info for additional properties.
+
+    uno::Reference< css::ucb::XPersistentPropertySet >
+        xSet ( m_pContent->getAdditionalPropertySet( false ) );
+
+    if ( xSet.is() )
+    {
+        // Get property set info.
+        uno::Reference< beans::XPropertySetInfo > xInfo(
+            xSet->getPropertySetInfo() );
+        if ( xInfo.is() )
+        {
+            const uno::Sequence< beans::Property >& rAddProps
+                = xInfo->getProperties();
+            sal_Int32 nAddProps = rAddProps.getLength();
+            if ( nAddProps > 0 )
+            {
+                sal_Int32 nPos = m_xProps->getLength();
+                m_xProps->realloc( nPos + nAddProps );
+
+                std::copy(rAddProps.begin(), rAddProps.end(),
+                          std::next(m_xProps->getArray(), nPos));
+            }
+        }
+    }
+    return *m_xProps;
+}
+
+
+// virtual
+beans::Property SAL_CALL PropertySetInfo::getPropertyByName(
+        const OUString& aName )
+{
+    beans::Property aProp;
+    if ( queryProperty( aName, aProp ) )
+        return aProp;
+
+    throw beans::UnknownPropertyException(aName);
+}
+
+
+// virtual
+sal_Bool SAL_CALL PropertySetInfo::hasPropertyByName(
+        const OUString& Name )
+{
+    beans::Property aProp;
+    return queryProperty( Name, aProp );
+}
+
+
+// Non-Interface methods.
+
+
+void PropertySetInfo::reset()
+{
+    std::unique_lock aGuard( m_aMutex );
+    m_xProps.reset();
+}
+
+
+bool PropertySetInfo::queryProperty(
+    std::u16string_view rName, beans::Property& rProp )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    getPropertiesImpl();
+
+    const beans::Property* pProps = m_xProps->getConstArray();
+    sal_Int32 nCount = m_xProps->getLength();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const beans::Property& rCurrProp = pProps[ n ];
+        if ( rCurrProp.Name == rName )
+        {
+            rProp = rCurrProp;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+
+// CommandProcessorInfo Implementation.
+
+
+CommandProcessorInfo::CommandProcessorInfo(
+    const uno::Reference< css::ucb::XCommandEnvironment >& rxEnv,
+    ContentImplHelper* pContent )
+: m_xEnv( rxEnv ),
+  m_pContent( pContent )
+{
+}
+
+
+// virtual
+CommandProcessorInfo::~CommandProcessorInfo()
+{
+}
+
+
+// XCommandInfo methods.
+
+
+// virtual
+uno::Sequence< css::ucb::CommandInfo > SAL_CALL CommandProcessorInfo::getCommands()
+{
+    std::unique_lock aGuard( m_aMutex );
+    return getCommandsImpl();
+}
+
+const uno::Sequence< css::ucb::CommandInfo > & CommandProcessorInfo::getCommandsImpl()
+{
+    if ( m_xCommands )
+        return *m_xCommands;
+
+    // Get info for commands.
+
+    try
+    {
+        m_xCommands = m_pContent->getCommands( m_xEnv );
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( uno::Exception const & )
+    {
+        m_xCommands.emplace();
+    }
+    return *m_xCommands;
+}
+
+
+// virtual
+css::ucb::CommandInfo SAL_CALL
+CommandProcessorInfo::getCommandInfoByName(
+        const OUString& Name )
+{
+    css::ucb::CommandInfo aInfo;
+    if ( queryCommand( Name, aInfo ) )
+        return aInfo;
+
+    throw css::ucb::UnsupportedCommandException();
+}
+
+
+// virtual
+css::ucb::CommandInfo SAL_CALL
+CommandProcessorInfo::getCommandInfoByHandle( sal_Int32 Handle )
+{
+    css::ucb::CommandInfo aInfo;
+    if ( queryCommand( Handle, aInfo ) )
+        return aInfo;
+
+    throw css::ucb::UnsupportedCommandException();
+}
+
+
+// virtual
+sal_Bool SAL_CALL CommandProcessorInfo::hasCommandByName(
+       const OUString& Name )
+{
+    css::ucb::CommandInfo aInfo;
+    return queryCommand( Name, aInfo );
+}
+
+
+// virtual
+sal_Bool SAL_CALL CommandProcessorInfo::hasCommandByHandle( sal_Int32 Handle )
+{
+    css::ucb::CommandInfo aInfo;
+    return queryCommand( Handle, aInfo );
+}
+
+
+// Non-Interface methods.
+
+
+void CommandProcessorInfo::reset()
+{
+    std::unique_lock aGuard( m_aMutex );
+    m_xCommands.reset();
+}
+
+
+bool CommandProcessorInfo::queryCommand(
+    std::u16string_view rName,
+    css::ucb::CommandInfo& rCommand )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    getCommandsImpl();
+
+    const css::ucb::CommandInfo* pCommands
+        = m_xCommands->getConstArray();
+    sal_Int32 nCount = m_xCommands->getLength();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const css::ucb::CommandInfo& rCurrCommand = pCommands[ n ];
+        if ( rCurrCommand.Name == rName )
+        {
+            rCommand = rCurrCommand;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+
+bool CommandProcessorInfo::queryCommand(
+    sal_Int32 nHandle,
+    css::ucb::CommandInfo& rCommand )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    getCommandsImpl();
+
+    const css::ucb::CommandInfo* pCommands = m_xCommands->getConstArray();
+    sal_Int32 nCount = m_xCommands->getLength();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const css::ucb::CommandInfo& rCurrCommand = pCommands[ n ];
+        if ( rCurrCommand.Handle == nHandle )
+        {
+            rCommand = rCurrCommand;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/contentinfo.hxx b/ucbhelper/source/provider/contentinfo.hxx
new file mode 100644
index 000000000..922384832
--- /dev/null
+++ b/ucbhelper/source/provider/contentinfo.hxx
@@ -0,0 +1,119 @@
+/* -*- 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 .
+ */
+
+#ifndef UCBHELPER_SOURCE_PROVIDER_CONTENTINFO_HXX
+#define UCBHELPER_SOURCE_PROVIDER_CONTENTINFO_HXX
+
+#include <optional>
+#include <com/sun/star/ucb/XCommandInfo.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+
+#include <mutex>
+
+namespace com::sun::star::ucb { class XCommandEnvironment; }
+
+namespace ucbhelper {
+
+
+
+
+class ContentImplHelper;
+
+/**
+  * This class provides a propertyset info ( the complete implementation of
+  * the interface XPropertySetInfo ) for an object derived from class
+  * ucb::ContentImplHelper. The implementation takes care about Additional
+  * Core Properties that may have been added to the content.
+  */
+class PropertySetInfo :
+                public cppu::WeakImplHelper<css::beans::XPropertySetInfo>
+{
+    css::uno::Reference< css::ucb::XCommandEnvironment >
+                                m_xEnv;
+    std::optional<css::uno::Sequence< css::beans::Property >>
+                                m_xProps;
+    std::mutex                  m_aMutex;
+    ContentImplHelper*          m_pContent;
+
+private:
+    bool queryProperty( std::u16string_view rName,
+                            css::beans::Property& rProp );
+    const css::uno::Sequence< css::beans::Property > & getPropertiesImpl();
+
+public:
+    PropertySetInfo( const css::uno::Reference< css::ucb::XCommandEnvironment >& rxEnv,
+                     ContentImplHelper* pContent );
+    virtual ~PropertySetInfo() override;
+
+    // XPropertySetInfo
+    virtual css::uno::Sequence< css::beans::Property > SAL_CALL getProperties() override;
+    virtual css::beans::Property SAL_CALL getPropertyByName( const OUString& aName ) override;
+    virtual sal_Bool SAL_CALL hasPropertyByName( const OUString& Name ) override;
+
+    // Non-Interface methods.
+    void reset();
+};
+
+
+
+
+/**
+  * This class provides a command info ( the complete implementation of
+  * the interface XCommandInfo ) for an object derived from class
+  * ucb::ContentImplHelper.
+  */
+class CommandProcessorInfo :
+                public cppu::WeakImplHelper<css::ucb::XCommandInfo>
+{
+    css::uno::Reference< css::ucb::XCommandEnvironment >
+                                m_xEnv;
+    std::optional<css::uno::Sequence< css::ucb::CommandInfo >>
+                                m_xCommands;
+    std::mutex                  m_aMutex;
+    ContentImplHelper*          m_pContent;
+
+private:
+    bool queryCommand( std::u16string_view rName,
+                           css::ucb::CommandInfo& rCommand );
+    bool queryCommand( sal_Int32 nHandle,
+                           css::ucb::CommandInfo& rCommand );
+    const css::uno::Sequence< css::ucb::CommandInfo > & getCommandsImpl();
+
+public:
+    CommandProcessorInfo( const css::uno::Reference< css::ucb::XCommandEnvironment >& rxEnv,
+                         ContentImplHelper* pContent );
+    virtual ~CommandProcessorInfo() override;
+
+    // XCommandInfo
+    virtual css::uno::Sequence< css::ucb::CommandInfo > SAL_CALL getCommands() override;
+    virtual css::ucb::CommandInfo SAL_CALL getCommandInfoByName( const OUString& Name ) override;
+    virtual css::ucb::CommandInfo SAL_CALL getCommandInfoByHandle( sal_Int32 Handle ) override;
+    virtual sal_Bool SAL_CALL hasCommandByName( const OUString& Name ) override;
+    virtual sal_Bool SAL_CALL hasCommandByHandle( sal_Int32 Handle ) override;
+
+    // Non-Interface methods.
+    void reset();
+};
+
+} // namespace ucbhelper
+
+#endif /* ! UCBHELPER_SOURCE_PROVIDER_CONTENTINFO_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/fd_inputstream.cxx b/ucbhelper/source/provider/fd_inputstream.cxx
new file mode 100644
index 000000000..795c2dcae
--- /dev/null
+++ b/ucbhelper/source/provider/fd_inputstream.cxx
@@ -0,0 +1,146 @@
+/* -*- 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 <ucbhelper/fd_inputstream.hxx>
+
+#include <com/sun/star/io/IOException.hpp>
+#include <osl/diagnose.h>
+#include <sal/log.hxx>
+#include <algorithm>
+
+using namespace com::sun::star::uno;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::io;
+
+namespace ucbhelper
+{
+    FdInputStream::FdInputStream( oslFileHandle tmpfl )
+        : m_tmpfl(tmpfl)
+        , m_nLength( 0 )
+    {
+        if ( !m_tmpfl )
+            osl_createTempFile( nullptr, &m_tmpfl, nullptr );
+        OSL_ENSURE( m_tmpfl, "input stream without tempfile!" );
+
+        if ( osl_setFilePos( m_tmpfl, osl_Pos_End, 0 ) == osl_File_E_None )
+        {
+            sal_uInt64 nFileSize = 0;
+            if ( osl_getFilePos( m_tmpfl, &nFileSize ) == osl_File_E_None )
+                m_nLength = nFileSize;
+            oslFileError rc = osl_setFilePos( m_tmpfl, osl_Pos_Absolut, 0 );
+            SAL_WARN_IF(rc != osl_File_E_None, "ucbhelper", "osl_setFilePos failed");
+        }
+    }
+
+    FdInputStream::~FdInputStream()
+    {
+        if ( nullptr != m_tmpfl)
+            osl_closeFile(m_tmpfl);
+    }
+
+    sal_Int32 SAL_CALL FdInputStream::readBytes(Sequence< sal_Int8 >& aData,
+                                                 sal_Int32 nBytesToRead)
+    {
+        osl::MutexGuard aGuard(m_aMutex);
+
+        sal_uInt64 nBeforePos( 0 );
+        sal_uInt64 nBytesRequested( nBytesToRead );
+        sal_uInt64 nBytesRead( 0 );
+
+        osl_getFilePos( m_tmpfl, &nBeforePos );
+
+        if ( 0 == ( nBytesRequested = std::min< sal_uInt64 >( m_nLength - nBeforePos, nBytesRequested ) ) )
+            return 0;
+
+        if ( 0 <= nBytesToRead && aData.getLength() < nBytesToRead )
+            aData.realloc( nBytesToRead );
+
+        if ( osl_readFile( m_tmpfl, aData.getArray(), nBytesRequested, &nBytesRead ) != osl_File_E_None )
+            throw IOException();
+
+        return sal_Int32( nBytesRead );
+    }
+
+
+    sal_Int32 SAL_CALL FdInputStream::readSomeBytes( Sequence< sal_Int8 >& aData,
+                                                      sal_Int32 nMaxBytesToRead )
+    {
+        return readBytes(aData,nMaxBytesToRead);
+    }
+
+
+    void SAL_CALL FdInputStream::skipBytes(sal_Int32 nBytesToSkip)
+    {
+        osl::MutexGuard aGuard(m_aMutex);
+        if(!m_tmpfl)
+            throw IOException();
+
+        oslFileError rc = osl_setFilePos( m_tmpfl, osl_Pos_Current, nBytesToSkip );
+        SAL_WARN_IF(rc != osl_File_E_None, "ucbhelper", "osl_setFilePos failed");
+    }
+
+
+    sal_Int32 SAL_CALL FdInputStream::available()
+    {
+        return std::min<sal_Int64>(SAL_MAX_INT32, m_nLength - getPosition());
+    }
+
+
+    void SAL_CALL FdInputStream::closeInput()
+    {
+        osl::MutexGuard aGuard(m_aMutex);
+        if(m_tmpfl)
+        {
+            osl_closeFile(m_tmpfl);
+            m_tmpfl = nullptr;
+        }
+    }
+
+
+    void SAL_CALL FdInputStream::seek(sal_Int64 location)
+    {
+        osl::MutexGuard aGuard(m_aMutex);
+        if(!m_tmpfl)
+            throw IOException();
+
+        oslFileError rc = osl_setFilePos( m_tmpfl, osl_Pos_Absolut, location );
+        SAL_WARN_IF(rc != osl_File_E_None, "ucbhelper", "osl_setFilePos failed");
+    }
+
+
+    sal_Int64 SAL_CALL
+    FdInputStream::getPosition()
+    {
+        osl::MutexGuard aGuard(m_aMutex);
+        if(!m_tmpfl)
+            throw IOException();
+
+        sal_uInt64 nFilePos = 0;
+        osl_getFilePos( m_tmpfl, &nFilePos );
+        return nFilePos;
+    }
+
+
+    sal_Int64 SAL_CALL FdInputStream::getLength()
+    {
+        return m_nLength;
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/interactionrequest.cxx b/ucbhelper/source/provider/interactionrequest.cxx
new file mode 100644
index 000000000..95ed41994
--- /dev/null
+++ b/ucbhelper/source/provider/interactionrequest.cxx
@@ -0,0 +1,631 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include <ucbhelper/interactionrequest.hxx>
+
+#include <rtl/ref.hxx>
+#include <osl/diagnose.h>
+#include <cppuhelper/typeprovider.hxx>
+#include <cppuhelper/queryinterface.hxx>
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+
+// InteractionRequest Implementation.
+
+
+namespace ucbhelper
+{
+
+struct InteractionRequest_Impl
+{
+    rtl::Reference< InteractionContinuation > m_xSelection;
+    css::uno::Any m_aRequest;
+    css::uno::Sequence<
+        css::uno::Reference<
+            css::task::XInteractionContinuation > > m_aContinuations;
+
+    InteractionRequest_Impl() {}
+    explicit InteractionRequest_Impl( const uno::Any & rRequest )
+    : m_aRequest( rRequest ) {}
+};
+
+}
+
+
+InteractionRequest::InteractionRequest()
+: m_pImpl( new InteractionRequest_Impl )
+{
+}
+
+
+InteractionRequest::InteractionRequest( const uno::Any & rRequest )
+: m_pImpl( new InteractionRequest_Impl( rRequest ) )
+{
+}
+
+
+// virtual
+InteractionRequest::~InteractionRequest()
+{
+}
+
+
+void InteractionRequest::setRequest( const uno::Any & rRequest )
+{
+    m_pImpl->m_aRequest = rRequest;
+}
+
+
+void InteractionRequest::setContinuations(
+                const uno::Sequence< uno::Reference<
+                    task::XInteractionContinuation > > & rContinuations )
+{
+    m_pImpl->m_aContinuations = rContinuations;
+}
+
+
+rtl::Reference< InteractionContinuation > const &
+InteractionRequest::getSelection() const
+{
+    return m_pImpl->m_xSelection;
+}
+
+
+void InteractionRequest::setSelection(
+                const rtl::Reference< InteractionContinuation > & rxSelection )
+{
+    m_pImpl->m_xSelection = rxSelection;
+}
+
+
+// XInterface methods.
+
+
+// XInteractionRequest methods.
+
+
+// virtual
+uno::Any SAL_CALL InteractionRequest::getRequest()
+{
+    return m_pImpl->m_aRequest;
+}
+
+
+// virtual
+uno::Sequence< uno::Reference< task::XInteractionContinuation > > SAL_CALL
+InteractionRequest::getContinuations()
+{
+    return m_pImpl->m_aContinuations;
+}
+
+
+// InteractionContinuation Implementation.
+
+
+InteractionContinuation::InteractionContinuation(
+                        InteractionRequest * pRequest )
+: m_pRequest( pRequest )
+{
+}
+
+
+// virtual
+InteractionContinuation::~InteractionContinuation()
+{
+}
+
+
+void InteractionContinuation::recordSelection()
+{
+    m_pRequest->setSelection( this );
+}
+
+
+// InteractionAbort Implementation.
+
+
+// XInterface methods.
+
+
+// virtual
+uno::Any SAL_CALL
+InteractionAbort::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< task::XInteractionContinuation * >( this ),
+                static_cast< task::XInteractionAbort * >( this ) );
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL InteractionAbort::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL InteractionAbort::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<task::XInteractionAbort>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+
+// XInteractionContinuation methods.
+
+
+// virtual
+void SAL_CALL InteractionAbort::select()
+{
+    recordSelection();
+}
+
+
+// InteractionRetry Implementation.
+
+
+// XInterface methods.
+
+
+// virtual
+uno::Any SAL_CALL
+InteractionRetry::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< task::XInteractionContinuation * >( this ),
+                static_cast< task::XInteractionRetry * >( this ) );
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL InteractionRetry::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL InteractionRetry::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<task::XInteractionRetry>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+
+// XInteractionContinuation methods.
+
+
+// virtual
+void SAL_CALL InteractionRetry::select()
+{
+    recordSelection();
+}
+
+
+// InteractionApprove Implementation.
+
+
+// XInterface methods.
+
+
+// virtual
+uno::Any SAL_CALL
+InteractionApprove::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< task::XInteractionContinuation * >( this ),
+                static_cast< task::XInteractionApprove * >( this ) );
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL InteractionApprove::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL InteractionApprove::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<task::XInteractionApprove>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+
+// XInteractionContinuation methods.
+
+
+// virtual
+void SAL_CALL InteractionApprove::select()
+{
+    recordSelection();
+}
+
+
+// InteractionDisapprove Implementation.
+
+
+// XInterface methods.
+
+
+// virtual
+uno::Any SAL_CALL
+InteractionDisapprove::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< task::XInteractionContinuation * >( this ),
+                static_cast< task::XInteractionDisapprove * >( this ) );
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL InteractionDisapprove::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL InteractionDisapprove::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<task::XInteractionDisapprove>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+
+// XInteractionContinuation methods.
+
+
+// virtual
+void SAL_CALL InteractionDisapprove::select()
+{
+    recordSelection();
+}
+
+
+// InteractionSupplyAuthentication Implementation.
+
+
+// XInterface methods.
+
+
+// virtual
+uno::Any SAL_CALL
+InteractionSupplyAuthentication::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+            static_cast< lang::XTypeProvider * >( this ),
+            static_cast< task::XInteractionContinuation * >( this ),
+            static_cast< ucb::XInteractionSupplyAuthentication * >( this ),
+            static_cast< ucb::XInteractionSupplyAuthentication2 * >( this ));
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL
+InteractionSupplyAuthentication::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL InteractionSupplyAuthentication::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<ucb::XInteractionSupplyAuthentication2>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+
+// XInteractionContinuation methods.
+
+
+// virtual
+void SAL_CALL InteractionSupplyAuthentication::select()
+{
+    recordSelection();
+}
+
+
+// XInteractionSupplyAuthentication methods.
+
+
+// virtual
+sal_Bool SAL_CALL
+InteractionSupplyAuthentication::canSetRealm()
+{
+    return m_bCanSetRealm;
+}
+
+
+// virtual
+void SAL_CALL
+InteractionSupplyAuthentication::setRealm( const OUString& Realm )
+{
+    OSL_ENSURE( m_bCanSetPassword,
+        "InteractionSupplyAuthentication::setRealm - Not supported!" );
+
+    if ( m_bCanSetRealm )
+        m_aRealm = Realm;
+}
+
+
+// virtual
+sal_Bool SAL_CALL
+InteractionSupplyAuthentication::canSetUserName()
+{
+    return m_bCanSetUserName;
+}
+
+
+// virtual
+void SAL_CALL
+InteractionSupplyAuthentication::setUserName( const OUString& UserName )
+{
+    OSL_ENSURE( m_bCanSetUserName,
+        "InteractionSupplyAuthentication::setUserName - Not supported!" );
+
+    if ( m_bCanSetUserName )
+        m_aUserName = UserName;
+}
+
+
+// virtual
+sal_Bool SAL_CALL
+InteractionSupplyAuthentication::canSetPassword()
+{
+    return m_bCanSetPassword;
+}
+
+
+// virtual
+void SAL_CALL
+InteractionSupplyAuthentication::setPassword( const OUString& Password )
+{
+    OSL_ENSURE( m_bCanSetPassword,
+        "InteractionSupplyAuthentication::setPassword - Not supported!" );
+
+    if ( m_bCanSetPassword )
+        m_aPassword = Password;
+}
+
+
+// virtual
+uno::Sequence< ucb::RememberAuthentication > SAL_CALL
+InteractionSupplyAuthentication::getRememberPasswordModes(
+                                    ucb::RememberAuthentication& Default )
+{
+    Default = m_eDefaultRememberPasswordMode;
+    return m_aRememberPasswordModes;
+}
+
+
+// virtual
+void SAL_CALL
+InteractionSupplyAuthentication::setRememberPassword(
+                                    ucb::RememberAuthentication Remember )
+{
+    m_eRememberPasswordMode = Remember;
+}
+
+
+// virtual
+sal_Bool SAL_CALL
+InteractionSupplyAuthentication::canSetAccount()
+{
+    return m_bCanSetAccount;
+}
+
+
+// virtual
+void SAL_CALL
+InteractionSupplyAuthentication::setAccount( const OUString& /*Account*/ )
+{
+    OSL_ENSURE( m_bCanSetAccount,
+        "InteractionSupplyAuthentication::setAccount - Not supported!" );
+}
+
+
+// virtual
+uno::Sequence< ucb::RememberAuthentication > SAL_CALL
+InteractionSupplyAuthentication::getRememberAccountModes(
+                                    ucb::RememberAuthentication& Default )
+{
+    Default = m_eDefaultRememberAccountMode;
+    return m_aRememberAccountModes;
+}
+
+
+// virtual
+void SAL_CALL InteractionSupplyAuthentication::setRememberAccount(
+                                    ucb::RememberAuthentication )
+{
+}
+
+
+// XInteractionSupplyAuthentication2 methods.
+
+
+// virtual
+sal_Bool SAL_CALL
+InteractionSupplyAuthentication::canUseSystemCredentials(
+        sal_Bool& Default )
+{
+    Default = false;
+    return m_bCanUseSystemCredentials;
+}
+
+
+// virtual
+void SAL_CALL InteractionSupplyAuthentication::setUseSystemCredentials(
+        sal_Bool UseSystemCredentials )
+{
+    if ( m_bCanUseSystemCredentials )
+        m_bUseSystemCredentials = UseSystemCredentials;
+}
+
+
+// InteractionReplaceExistingData Implementation.
+
+
+// XInterface methods.
+
+
+// virtual
+uno::Any SAL_CALL
+InteractionReplaceExistingData::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< task::XInteractionContinuation * >( this ),
+                static_cast< ucb::XInteractionReplaceExistingData * >( this ) );
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL
+InteractionReplaceExistingData::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL InteractionReplaceExistingData::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<ucb::XInteractionReplaceExistingData>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+
+// XInteractionContinuation methods.
+
+
+// virtual
+void SAL_CALL InteractionReplaceExistingData::select()
+{
+    recordSelection();
+}
+
+// InteractionAuthFallback Implementation
+
+// XInterface methods.
+
+// virtual
+uno::Any SAL_CALL
+InteractionAuthFallback::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+            static_cast< task::XInteractionContinuation * >( this ),
+            static_cast< ucb::XInteractionAuthFallback * >( this ));
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+// XInteractionContinuation methods.
+
+// virtual
+void SAL_CALL InteractionAuthFallback::select()
+{
+    recordSelection();
+}
+
+// XInteractionAuthFallback methods
+
+// virtual
+void SAL_CALL InteractionAuthFallback::setCode( const OUString& code )
+{
+    m_aCode = code;
+}
+
+const OUString& InteractionAuthFallback::getCode() const
+{
+    return m_aCode;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/propertyvalueset.cxx b/ucbhelper/source/provider/propertyvalueset.cxx
new file mode 100644
index 000000000..a6a7312c2
--- /dev/null
+++ b/ucbhelper/source/provider/propertyvalueset.cxx
@@ -0,0 +1,687 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+
+#include <vector>
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/XPropertyAccess.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/script/CannotConvertException.hpp>
+#include <com/sun/star/script/Converter.hpp>
+
+#include <osl/diagnose.h>
+#include <ucbhelper/propertyvalueset.hxx>
+#include <o3tl/safeint.hxx>
+#include <o3tl/typed_flags_set.hxx>
+
+using namespace com::sun::star::beans;
+using namespace com::sun::star::container;
+using namespace com::sun::star::io;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::script;
+using namespace com::sun::star::sdbc;
+using namespace com::sun::star::uno;
+using namespace com::sun::star::util;
+
+enum class PropsSet {
+    NONE             = 0x00000000,
+    String           = 0x00000001,
+    Boolean          = 0x00000002,
+    Byte             = 0x00000004,
+    Short            = 0x00000008,
+    Int              = 0x00000010,
+    Long             = 0x00000020,
+    Float            = 0x00000040,
+    Double           = 0x00000080,
+    Bytes            = 0x00000100,
+    Date             = 0x00000200,
+    Time             = 0x00000400,
+    Timestamp        = 0x00000800,
+    BinaryStream     = 0x00001000,
+    CharacterStream  = 0x00002000,
+    Ref              = 0x00004000,
+    Blob             = 0x00008000,
+    Clob             = 0x00010000,
+    Array            = 0x00020000,
+    Object           = 0x00040000
+};
+namespace o3tl {
+    template<> struct typed_flags<PropsSet> : is_typed_flags<PropsSet, 0x0007ffff> {};
+}
+
+namespace ucbhelper_impl
+{
+
+
+struct PropertyValue
+{
+    OUString    sPropertyName;
+
+    PropsSet    nPropsSet;
+    PropsSet    nOrigValue;
+
+    OUString    aString;    // getString
+    bool        bBoolean;   // getBoolean
+    sal_Int8    nByte;      // getByte
+    sal_Int16   nShort;     // getShort
+    sal_Int32   nInt;       // getInt
+    sal_Int64   nLong;      // getLong
+    float       nFloat;     // getFloat
+    double      nDouble;    // getDouble
+
+    Sequence< sal_Int8 >        aBytes;             // getBytes
+    Date                        aDate;              // getDate
+    Time                        aTime;              // getTime
+    DateTime                    aTimestamp;         // getTimestamp
+    Reference< XInputStream >   xBinaryStream;      // getBinaryStream
+    Reference< XInputStream >   xCharacterStream;   // getCharacterStream
+    Reference< XRef >           xRef;               // getRef
+    Reference< XBlob >          xBlob;              // getBlob
+    Reference< XClob >          xClob;              // getClob
+    Reference< XArray >         xArray;             // getArray
+    Any                         aObject;            // getObject
+
+    PropertyValue()
+        : nPropsSet( PropsSet::NONE ), nOrigValue( PropsSet::NONE ),
+          bBoolean(false),
+          nByte(0),
+          nShort(0),
+          nInt(0),
+          nLong(0),
+          nFloat(0.0),
+          nDouble(0.0)
+        {}
+};
+} // namespace ucbhelper_impl
+
+using namespace ucbhelper_impl;
+
+namespace ucbhelper
+{
+
+class PropertyValues : public std::vector< ucbhelper_impl::PropertyValue > {};
+
+} // namespace ucbhelper
+
+
+namespace ucbhelper {
+
+
+// PropertyValueSet Implementation.
+
+
+PropertyValueSet::PropertyValueSet(
+                    const Reference< XComponentContext >& rxContext )
+:  m_xContext( rxContext ),
+  m_pValues( new PropertyValues ),
+  m_bWasNull( false ),
+  m_bTriedToGetTypeConverter( false )
+
+{
+}
+
+
+// virtual
+PropertyValueSet::~PropertyValueSet()
+{
+}
+
+
+// XRow methods.
+
+
+template <class T, T ucbhelper_impl::PropertyValue::*_member_name_>
+T PropertyValueSet::getValue(PropsSet nTypeName, sal_Int32 columnIndex)
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    T aValue {};   /* default ctor */
+
+    m_bWasNull = true;
+
+    if ( ( columnIndex < 1 ) || ( o3tl::make_unsigned(columnIndex) > m_pValues->size() ) )
+    {
+        OSL_FAIL( "PropertyValueSet - index out of range!" );
+        return aValue;
+    }
+    ucbhelper_impl::PropertyValue& rValue = (*m_pValues)[ columnIndex - 1 ];
+
+    if ( rValue.nOrigValue == PropsSet::NONE )
+        return aValue;
+
+    if ( rValue.nPropsSet & nTypeName )
+    {
+        /* Values is present natively... */
+        aValue = rValue.*_member_name_;
+        m_bWasNull = false;
+        return aValue;
+    }
+
+    if ( !(rValue.nPropsSet & PropsSet::Object) )
+    {
+        /* Value is not (yet) available as Any. Create it. */
+        getObject( columnIndex, Reference< XNameAccess >() );
+    }
+
+    if ( rValue.nPropsSet & PropsSet::Object )
+    {
+        /* Value is available as Any. */
+
+        if ( rValue.aObject.hasValue() )
+        {
+            /* Try to convert into native value. */
+            if ( rValue.aObject >>= aValue )
+            {
+                rValue.*_member_name_ = aValue;
+                rValue.nPropsSet |= nTypeName;
+                m_bWasNull = false;
+            }
+            else
+            {
+                /* Last chance. Try type converter service... */
+
+                Reference< XTypeConverter > xConverter = getTypeConverter();
+                if ( xConverter.is() )
+                {
+                    try
+                    {
+                        Any aConvAny = xConverter->convertTo(
+                                                 rValue.aObject,
+                                                 cppu::UnoType<T>::get() );
+
+                        if ( aConvAny >>= aValue )
+                        {
+                            rValue.*_member_name_ = aValue;
+                            rValue.nPropsSet |= nTypeName;
+                            m_bWasNull = false;
+                        }
+                    }
+                    catch (const IllegalArgumentException&)
+                    {
+                    }
+                    catch (const CannotConvertException&)
+                    {
+                    }
+                }
+            }
+        }
+    }
+
+    return aValue;
+}
+
+
+// virtual
+sal_Bool SAL_CALL PropertyValueSet::wasNull()
+{
+    // This method can not be implemented correctly!!! Imagine different
+    // threads doing a getXYZ - wasNull calling sequence on the same
+    // implementation object...
+    return m_bWasNull;
+}
+
+
+// virtual
+OUString SAL_CALL PropertyValueSet::getString( sal_Int32 columnIndex )
+{
+    return getValue<OUString, &ucbhelper_impl::PropertyValue::aString>(PropsSet::String, columnIndex);
+}
+
+
+// virtual
+sal_Bool SAL_CALL PropertyValueSet::getBoolean( sal_Int32 columnIndex )
+{
+    return getValue<bool, &ucbhelper_impl::PropertyValue::bBoolean>(PropsSet::Boolean, columnIndex);
+}
+
+
+// virtual
+sal_Int8 SAL_CALL PropertyValueSet::getByte( sal_Int32 columnIndex )
+{
+    return getValue<sal_Int8, &ucbhelper_impl::PropertyValue::nByte>(PropsSet::Byte, columnIndex);
+}
+
+
+// virtual
+sal_Int16 SAL_CALL PropertyValueSet::getShort( sal_Int32 columnIndex )
+{
+    return getValue<sal_Int16, &ucbhelper_impl::PropertyValue::nShort>(PropsSet::Short, columnIndex);
+}
+
+
+// virtual
+sal_Int32 SAL_CALL PropertyValueSet::getInt( sal_Int32 columnIndex )
+{
+    return getValue<sal_Int32, &ucbhelper_impl::PropertyValue::nInt>(PropsSet::Int, columnIndex);
+}
+
+
+// virtual
+sal_Int64 SAL_CALL PropertyValueSet::getLong( sal_Int32 columnIndex )
+{
+    return getValue<sal_Int64, &ucbhelper_impl::PropertyValue::nLong>(PropsSet::Long, columnIndex);
+}
+
+
+// virtual
+float SAL_CALL PropertyValueSet::getFloat( sal_Int32 columnIndex )
+{
+    return getValue<float, &ucbhelper_impl::PropertyValue::nFloat>(PropsSet::Float, columnIndex);
+}
+
+
+// virtual
+double SAL_CALL PropertyValueSet::getDouble( sal_Int32 columnIndex )
+{
+    return getValue<double, &ucbhelper_impl::PropertyValue::nDouble>(PropsSet::Double, columnIndex);
+}
+
+
+// virtual
+Sequence< sal_Int8 > SAL_CALL
+PropertyValueSet::getBytes( sal_Int32 columnIndex )
+{
+    return getValue<Sequence< sal_Int8 >, &ucbhelper_impl::PropertyValue::aBytes>(PropsSet::Bytes, columnIndex);
+}
+
+
+// virtual
+Date SAL_CALL PropertyValueSet::getDate( sal_Int32 columnIndex )
+{
+    return getValue<Date, &ucbhelper_impl::PropertyValue::aDate>(PropsSet::Date, columnIndex);
+}
+
+
+// virtual
+Time SAL_CALL PropertyValueSet::getTime( sal_Int32 columnIndex )
+{
+    return getValue<Time, &ucbhelper_impl::PropertyValue::aTime>(PropsSet::Time, columnIndex);
+}
+
+
+// virtual
+DateTime SAL_CALL PropertyValueSet::getTimestamp( sal_Int32 columnIndex )
+{
+    return getValue<DateTime, &ucbhelper_impl::PropertyValue::aTimestamp>(PropsSet::Timestamp, columnIndex);
+}
+
+
+// virtual
+Reference< XInputStream > SAL_CALL
+PropertyValueSet::getBinaryStream( sal_Int32 columnIndex )
+{
+    return getValue<Reference< XInputStream >, &ucbhelper_impl::PropertyValue::xBinaryStream>(PropsSet::BinaryStream, columnIndex);
+}
+
+
+// virtual
+Reference< XInputStream > SAL_CALL
+PropertyValueSet::getCharacterStream( sal_Int32 columnIndex )
+{
+    return getValue<Reference< XInputStream >, &ucbhelper_impl::PropertyValue::xCharacterStream>(PropsSet::CharacterStream, columnIndex);
+}
+
+
+// virtual
+Any SAL_CALL PropertyValueSet::getObject(
+                                    sal_Int32 columnIndex,
+                                         const Reference< XNameAccess >& )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    Any aValue;
+
+    m_bWasNull = true;
+
+    if ( ( columnIndex < 1 )
+         || ( o3tl::make_unsigned(columnIndex) > m_pValues->size() ) )
+    {
+        OSL_FAIL( "PropertyValueSet - index out of range!" );
+    }
+    else
+    {
+        ucbhelper_impl::PropertyValue& rValue
+            = (*m_pValues)[ columnIndex - 1 ];
+
+        if ( rValue.nPropsSet & PropsSet::Object )
+        {
+            // Values is present natively...
+            aValue = rValue.aObject;
+            m_bWasNull = false;
+        }
+        else
+        {
+            // Make Any from original value.
+
+            switch ( rValue.nOrigValue )
+            {
+                case PropsSet::NONE:
+                    break;
+
+                case PropsSet::String:
+                    aValue <<= rValue.aString;
+                    break;
+
+                case PropsSet::Boolean:
+                    aValue <<= rValue.bBoolean;
+                    break;
+
+                case PropsSet::Byte:
+                    aValue <<= rValue.nByte;
+                    break;
+
+                case PropsSet::Short:
+                    aValue <<= rValue.nShort;
+                    break;
+
+                case PropsSet::Int:
+                    aValue <<= rValue.nInt;
+                    break;
+
+                case PropsSet::Long:
+                    aValue <<= rValue.nLong;
+                    break;
+
+                case PropsSet::Float:
+                    aValue <<= rValue.nFloat;
+                    break;
+
+                case PropsSet::Double:
+                    aValue <<= rValue.nDouble;
+                    break;
+
+                case PropsSet::Bytes:
+                    aValue <<= rValue.aBytes;
+                    break;
+
+                case PropsSet::Date:
+                    aValue <<= rValue.aDate;
+                    break;
+
+                case PropsSet::Time:
+                    aValue <<= rValue.aTime;
+                    break;
+
+                case PropsSet::Timestamp:
+                    aValue <<= rValue.aTimestamp;
+                    break;
+
+                case PropsSet::BinaryStream:
+                    aValue <<= rValue.xBinaryStream;
+                    break;
+
+                case PropsSet::CharacterStream:
+                    aValue <<= rValue.xCharacterStream;
+                    break;
+
+                case PropsSet::Ref:
+                    aValue <<= rValue.xRef;
+                    break;
+
+                case PropsSet::Blob:
+                    aValue <<= rValue.xBlob;
+                    break;
+
+                case PropsSet::Clob:
+                    aValue <<= rValue.xClob;
+                    break;
+
+                case PropsSet::Array:
+                    aValue <<= rValue.xArray;
+                    break;
+
+                case PropsSet::Object:
+                    // Fall-through is intended!
+                default:
+                    OSL_FAIL( "PropertyValueSet::getObject - "
+                                "Wrong original type" );
+                    break;
+            }
+
+            if ( aValue.hasValue() )
+            {
+                rValue.aObject = aValue;
+                rValue.nPropsSet |= PropsSet::Object;
+                m_bWasNull = false;
+            }
+        }
+     }
+
+    return aValue;
+}
+
+
+// virtual
+Reference< XRef > SAL_CALL PropertyValueSet::getRef( sal_Int32 columnIndex )
+{
+    return getValue<Reference< XRef >, &ucbhelper_impl::PropertyValue::xRef>(PropsSet::Ref, columnIndex);
+}
+
+
+// virtual
+Reference< XBlob > SAL_CALL PropertyValueSet::getBlob( sal_Int32 columnIndex )
+{
+    return getValue<Reference< XBlob >, &ucbhelper_impl::PropertyValue::xBlob>(PropsSet::Blob, columnIndex);
+}
+
+
+// virtual
+Reference< XClob > SAL_CALL PropertyValueSet::getClob( sal_Int32 columnIndex )
+{
+    return getValue<Reference< XClob >, &ucbhelper_impl::PropertyValue::xClob>(PropsSet::Clob, columnIndex);
+}
+
+
+// virtual
+Reference< XArray > SAL_CALL PropertyValueSet::getArray( sal_Int32 columnIndex )
+{
+    return getValue<Reference< XArray >, &ucbhelper_impl::PropertyValue::xArray>(PropsSet::Array, columnIndex);
+}
+
+
+// XColumnLocate methods.
+
+
+// virtual
+sal_Int32 SAL_CALL PropertyValueSet::findColumn( const OUString& columnName )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( !columnName.isEmpty() )
+    {
+        sal_Int32 nCount = m_pValues->size();
+        for ( sal_Int32 n = 0; n < nCount; ++n )
+        {
+            if ( (*m_pValues)[ n ].sPropertyName == columnName  )
+                return n + 1; // Index is 1-based.
+        }
+    }
+    return 0;
+}
+
+
+// Non-interface methods.
+
+
+const Reference< XTypeConverter >& PropertyValueSet::getTypeConverter()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( !m_bTriedToGetTypeConverter && !m_xTypeConverter.is() )
+    {
+        m_bTriedToGetTypeConverter = true;
+        m_xTypeConverter = Converter::create(m_xContext);
+
+        OSL_ENSURE( m_xTypeConverter.is(),
+                    "PropertyValueSet::getTypeConverter() - "
+                    "Service 'com.sun.star.script.Converter' n/a!" );
+    }
+    return m_xTypeConverter;
+}
+
+
+template <class T, T ucbhelper_impl::PropertyValue::*_member_name_>
+void PropertyValueSet::appendValue(const OUString& rPropName, PropsSet nTypeName, const T& rValue)
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    ucbhelper_impl::PropertyValue aNewValue;
+    aNewValue.sPropertyName = rPropName;
+    aNewValue.nPropsSet     = nTypeName;
+    aNewValue.nOrigValue    = nTypeName;
+    aNewValue.*_member_name_ = rValue;
+
+    m_pValues->push_back( aNewValue );
+}
+
+
+void PropertyValueSet::appendString( const OUString& rPropName,
+                                     const OUString& rValue )
+{
+    appendValue<OUString, &ucbhelper_impl::PropertyValue::aString>(rPropName, PropsSet::String, rValue);
+}
+
+
+void PropertyValueSet::appendBoolean( const OUString& rPropName,
+                                      bool bValue )
+{
+    appendValue<bool, &ucbhelper_impl::PropertyValue::bBoolean>(rPropName, PropsSet::Boolean, bValue);
+}
+
+
+void PropertyValueSet::appendLong( const OUString& rPropName,
+                                   sal_Int64 nValue )
+{
+    appendValue<sal_Int64, &ucbhelper_impl::PropertyValue::nLong>(rPropName, PropsSet::Long, nValue);
+}
+
+
+void PropertyValueSet::appendTimestamp( const OUString& rPropName,
+                                        const DateTime& rValue )
+{
+    appendValue<DateTime, &ucbhelper_impl::PropertyValue::aTimestamp>(rPropName, PropsSet::Timestamp, rValue);
+}
+
+
+void PropertyValueSet::appendObject( const OUString& rPropName,
+                                     const Any& rValue )
+{
+    appendValue<Any, &ucbhelper_impl::PropertyValue::aObject>(rPropName, PropsSet::Object, rValue);
+}
+
+
+void PropertyValueSet::appendVoid( const OUString& rPropName )
+{
+    appendValue<Any, &ucbhelper_impl::PropertyValue::aObject>(rPropName, PropsSet::NONE, Any());
+}
+
+
+void PropertyValueSet::appendPropertySet(
+                                const Reference< XPropertySet >& rxSet )
+{
+    if ( !rxSet.is() )
+        return;
+
+    Reference< XPropertySetInfo > xInfo = rxSet->getPropertySetInfo();
+    if ( !xInfo.is() )
+        return;
+
+    const Sequence< Property > aProps = xInfo->getProperties();
+
+    Reference< XPropertyAccess > xPropertyAccess( rxSet, UNO_QUERY );
+    if ( xPropertyAccess.is() )
+    {
+        // Efficient: Get all prop values with one ( remote) call.
+
+        const Sequence< css::beans::PropertyValue > aPropValues
+            = xPropertyAccess->getPropertyValues();
+
+        for ( const css::beans::PropertyValue& rPropValue : aPropValues )
+        {
+            // Find info for current property value.
+            auto pProp = std::find_if(aProps.begin(), aProps.end(),
+                [&rPropValue](const Property& rProp) { return rProp.Name == rPropValue.Name; });
+            if (pProp != aProps.end())
+            {
+                // Found!
+                appendObject( *pProp, rPropValue.Value );
+            }
+        }
+    }
+    else
+    {
+        // Get every single prop value with one ( remote) call.
+
+        for ( const Property& rProp : aProps )
+        {
+            try
+            {
+                Any aValue = rxSet->getPropertyValue( rProp.Name );
+
+                if ( aValue.hasValue() )
+                    appendObject( rProp, aValue );
+            }
+            catch (const UnknownPropertyException&)
+            {
+            }
+            catch (const WrappedTargetException&)
+            {
+            }
+        }
+    }
+}
+
+
+bool PropertyValueSet::appendPropertySetValue(
+                                const Reference< XPropertySet >& rxSet,
+                                const Property& rProperty )
+{
+    if ( rxSet.is() )
+    {
+        try
+        {
+            Any aValue = rxSet->getPropertyValue( rProperty.Name );
+            if ( aValue.hasValue() )
+            {
+                appendObject( rProperty, aValue );
+                return true;
+            }
+        }
+        catch (const UnknownPropertyException&)
+        {
+        }
+        catch (const WrappedTargetException&)
+        {
+        }
+    }
+
+    // Error.
+    return false;
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/providerhelper.cxx b/ucbhelper/source/provider/providerhelper.cxx
new file mode 100644
index 000000000..c0bbc8616
--- /dev/null
+++ b/ucbhelper/source/provider/providerhelper.cxx
@@ -0,0 +1,496 @@
+/* -*- 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/IllegalTypeException.hpp>
+#include <com/sun/star/beans/PropertyExistException.hpp>
+#include <com/sun/star/beans/XPropertyAccess.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/ucb/Store.hpp>
+#include <com/sun/star/ucb/XPropertySetRegistry.hpp>
+#include <com/sun/star/ucb/XPropertySetRegistryFactory.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/contenthelper.hxx>
+#include <ucbhelper/providerhelper.hxx>
+
+#include <osl/diagnose.h>
+#include <osl/mutex.hxx>
+#include <cppuhelper/weakref.hxx>
+
+#include <unordered_map>
+
+using namespace com::sun::star;
+
+namespace ucbhelper_impl
+{
+
+typedef std::unordered_map
+<
+    OUString,
+    uno::WeakReference< ucb::XContent >
+>
+Contents;
+
+struct ContentProviderImplHelper_Impl
+{
+    uno::Reference< css::ucb::XPropertySetRegistry >  m_xPropertySetRegistry;
+    Contents                                          m_aContents;
+};
+
+} // namespace ucbhelper_impl
+
+namespace ucbhelper {
+
+ContentProviderImplHelper::ContentProviderImplHelper(
+    const uno::Reference< uno::XComponentContext >& rxContext )
+: m_pImpl( new ucbhelper_impl::ContentProviderImplHelper_Impl ),
+  m_xContext( rxContext )
+{
+}
+
+// virtual
+ContentProviderImplHelper::~ContentProviderImplHelper()
+{
+}
+
+// virtual
+sal_Bool SAL_CALL ContentProviderImplHelper::supportsService(
+                                            const OUString& ServiceName )
+{
+    return cppu::supportsService(this, ServiceName);
+}
+
+// virtual
+sal_Int32 SAL_CALL ContentProviderImplHelper::compareContentIds(
+        const uno::Reference< css::ucb::XContentIdentifier >& Id1,
+        const uno::Reference< css::ucb::XContentIdentifier >& Id2 )
+{
+    // Simply do a string compare.
+
+    OUString aURL1( Id1->getContentIdentifier() );
+    OUString aURL2( Id2->getContentIdentifier() );
+
+    return aURL1.compareTo( aURL2 );
+}
+
+void ContentProviderImplHelper::cleanupRegisteredContents()
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    ucbhelper_impl::Contents::iterator it
+        = m_pImpl->m_aContents.begin();
+    while( it != m_pImpl->m_aContents.end() )
+    {
+        uno::Reference< ucb::XContent > xContent( (*it).second );
+        if ( !xContent.is() )
+        {
+            ucbhelper_impl::Contents::iterator tmp = it;
+            ++it;
+            m_pImpl->m_aContents.erase( tmp );
+        }
+        else
+        {
+            ++it;
+        }
+    }
+}
+
+void ContentProviderImplHelper::removeContent( ContentImplHelper* pContent )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    cleanupRegisteredContents();
+
+    const OUString aURL(
+        pContent->getIdentifier()->getContentIdentifier() );
+
+    ucbhelper_impl::Contents::iterator it = m_pImpl->m_aContents.find( aURL );
+
+    if ( it != m_pImpl->m_aContents.end() )
+        m_pImpl->m_aContents.erase( it );
+}
+
+rtl::Reference< ContentImplHelper >
+ContentProviderImplHelper::queryExistingContent(
+    const uno::Reference< css::ucb::XContentIdentifier >& Identifier )
+{
+    return queryExistingContent( Identifier->getContentIdentifier() );
+}
+
+rtl::Reference< ContentImplHelper >
+ContentProviderImplHelper::queryExistingContent( const OUString& rURL )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    cleanupRegisteredContents();
+
+    // Check, if a content with given id already exists...
+
+    ucbhelper_impl::Contents::const_iterator it
+        = m_pImpl->m_aContents.find( rURL );
+    if ( it != m_pImpl->m_aContents.end() )
+    {
+        uno::Reference< ucb::XContent > xContent( (*it).second );
+        if ( xContent.is() )
+        {
+            return rtl::Reference< ContentImplHelper >(
+                static_cast< ContentImplHelper * >( xContent.get() ) );
+        }
+    }
+    return rtl::Reference< ContentImplHelper >();
+}
+
+void ContentProviderImplHelper::queryExistingContents(
+        ContentRefList& rContents )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    cleanupRegisteredContents();
+
+    for ( const auto& rContent : m_pImpl->m_aContents )
+    {
+        uno::Reference< ucb::XContent > xContent( rContent.second );
+        if ( xContent.is() )
+        {
+            rContents.emplace_back(
+                    static_cast< ContentImplHelper * >( xContent.get() ) );
+        }
+    }
+}
+
+void ContentProviderImplHelper::registerNewContent(
+    const uno::Reference< ucb::XContent > & xContent )
+{
+    if ( !xContent.is() )
+        return;
+
+    osl::MutexGuard aGuard( m_aMutex );
+
+    cleanupRegisteredContents();
+
+    const OUString aURL(
+        xContent->getIdentifier()->getContentIdentifier() );
+    ucbhelper_impl::Contents::const_iterator it
+        = m_pImpl->m_aContents.find( aURL );
+    if ( it == m_pImpl->m_aContents.end() )
+        m_pImpl->m_aContents[ aURL ] = xContent;
+}
+
+uno::Reference< css::ucb::XPropertySetRegistry >
+ContentProviderImplHelper::getAdditionalPropertySetRegistry()
+{
+    // Get propertyset registry.
+
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( !m_pImpl->m_xPropertySetRegistry.is() )
+    {
+        uno::Reference< css::ucb::XPropertySetRegistryFactory >
+            xRegFac = css::ucb::Store::create( m_xContext );
+
+        // Open/create a registry.
+        m_pImpl->m_xPropertySetRegistry
+            = xRegFac->createPropertySetRegistry( OUString() );
+
+        OSL_ENSURE( m_pImpl->m_xPropertySetRegistry.is(),
+                "ContentProviderImplHelper::getAdditionalPropertySet - "
+                "Error opening registry!" );
+    }
+
+    return m_pImpl->m_xPropertySetRegistry;
+}
+
+uno::Reference< css::ucb::XPersistentPropertySet >
+ContentProviderImplHelper::getAdditionalPropertySet(
+    const OUString& rKey, bool bCreate )
+{
+    // Get propertyset registry.
+    getAdditionalPropertySetRegistry();
+
+    if ( m_pImpl->m_xPropertySetRegistry.is() )
+    {
+        // Open/create persistent property set.
+        return m_pImpl->m_xPropertySetRegistry->openPropertySet(
+                rKey, bCreate );
+    }
+
+    return uno::Reference< css::ucb::XPersistentPropertySet >();
+}
+
+bool ContentProviderImplHelper::renameAdditionalPropertySet(
+    const OUString& rOldKey,
+    const OUString& rNewKey,
+    bool bRecursive )
+{
+    if ( rOldKey == rNewKey )
+        return true;
+
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( bRecursive )
+    {
+        // Get propertyset registry.
+        getAdditionalPropertySetRegistry();
+
+        if ( !m_pImpl->m_xPropertySetRegistry.is() )
+            return false;
+
+        uno::Reference< container::XNameAccess > xNameAccess(
+            m_pImpl->m_xPropertySetRegistry, uno::UNO_QUERY );
+        if ( !xNameAccess.is() )
+            return false;
+
+        const uno::Sequence< OUString > aKeys
+            = xNameAccess->getElementNames();
+        if ( aKeys.hasElements() )
+        {
+            OUString aOldKeyWithSlash = rOldKey;
+            OUString aOldKeyWithoutSlash;
+            if ( !aOldKeyWithSlash.endsWith("/") )
+            {
+                aOldKeyWithSlash += "/";
+                aOldKeyWithoutSlash = rOldKey;
+            }
+            else if ( !rOldKey.isEmpty() )
+                aOldKeyWithoutSlash
+                    = rOldKey.copy( 0, rOldKey.getLength() - 1 );
+
+            for ( const OUString& rKey : aKeys )
+            {
+                if ( rKey.startsWith( aOldKeyWithSlash )
+                     || rKey == aOldKeyWithoutSlash )
+                {
+                    OUString aNewKey
+                        = rKey.replaceAt(
+                            0, rOldKey.getLength(), rNewKey );
+                    if ( !renameAdditionalPropertySet(
+                            rKey, aNewKey, false ) )
+                        return false;
+                }
+            }
+        }
+    }
+    else
+    {
+        // Get old property set, if exists.
+        uno::Reference< css::ucb::XPersistentPropertySet > xOldSet
+            = getAdditionalPropertySet( rOldKey, false );
+        if ( xOldSet.is() )
+        {
+            // Rename property set.
+            uno::Reference< container::XNamed > xNamed(
+                xOldSet, uno::UNO_QUERY );
+            if ( !xNamed.is() )
+                return false;
+
+            // ??? throws no exceptions and has no return value ???
+            xNamed->setName( rNewKey );
+        }
+    }
+    return true;
+}
+
+bool ContentProviderImplHelper::copyAdditionalPropertySet(
+    const OUString& rSourceKey,
+    const OUString& rTargetKey,
+    bool bRecursive )
+{
+    if ( rSourceKey == rTargetKey )
+        return true;
+
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( bRecursive )
+    {
+        // Get propertyset registry.
+        getAdditionalPropertySetRegistry();
+
+        if ( !m_pImpl->m_xPropertySetRegistry.is() )
+            return false;
+
+        uno::Reference< container::XNameAccess > xNameAccess(
+            m_pImpl->m_xPropertySetRegistry, uno::UNO_QUERY );
+        if ( !xNameAccess.is() )
+            return false;
+
+        const uno::Sequence< OUString > aKeys
+            = xNameAccess->getElementNames();
+        if ( aKeys.hasElements() )
+        {
+            OUString aSrcKeyWithSlash = rSourceKey;
+            OUString aSrcKeyWithoutSlash;
+            if ( !aSrcKeyWithSlash.endsWith("/") )
+            {
+                aSrcKeyWithSlash += "/";
+                aSrcKeyWithoutSlash = rSourceKey;
+            }
+            else if ( !rSourceKey.isEmpty() )
+                aSrcKeyWithoutSlash = rSourceKey.copy(
+                    0, rSourceKey.getLength() - 1 );
+
+            for ( const OUString& rKey : aKeys )
+            {
+                if ( rKey.startsWith(aSrcKeyWithSlash )
+                     || rKey == aSrcKeyWithoutSlash )
+                {
+                    OUString aNewKey
+                        = rKey.replaceAt(
+                            0, rSourceKey.getLength(), rTargetKey );
+                    if ( !copyAdditionalPropertySet(
+                            rKey, aNewKey, false ) )
+                        return false;
+                }
+            }
+        }
+    }
+    else
+    {
+        // Get old property set, if exists.
+        uno::Reference< css::ucb::XPersistentPropertySet >
+            xOldPropSet = getAdditionalPropertySet( rSourceKey, false );
+        if ( !xOldPropSet.is() )
+            return false;
+
+        uno::Reference< beans::XPropertySetInfo > xPropSetInfo
+            = xOldPropSet->getPropertySetInfo();
+        if ( !xPropSetInfo.is() )
+            return false;
+
+        uno::Reference< beans::XPropertyAccess > xOldPropAccess(
+            xOldPropSet, uno::UNO_QUERY );
+        if ( !xOldPropAccess.is() )
+            return false;
+
+        // Obtain all values from old set.
+        const uno::Sequence< beans::PropertyValue > aValues
+            = xOldPropAccess->getPropertyValues();
+
+        const uno::Sequence< beans::Property > aProps
+            = xPropSetInfo->getProperties();
+
+        if ( aValues.hasElements() )
+        {
+            // Fail, if property set with new key already exists.
+            uno::Reference< css::ucb::XPersistentPropertySet >
+                xNewPropSet
+                    = getAdditionalPropertySet( rTargetKey, false );
+            if ( xNewPropSet.is() )
+                return false;
+
+            // Create new, empty set.
+            xNewPropSet = getAdditionalPropertySet( rTargetKey, true );
+            if ( !xNewPropSet.is() )
+                return false;
+
+            uno::Reference< beans::XPropertyContainer > xNewPropContainer(
+                xNewPropSet, uno::UNO_QUERY );
+            if ( !xNewPropContainer.is() )
+                return false;
+
+            for ( const beans::PropertyValue& rValue : aValues )
+            {
+                sal_Int16 nAttribs = 0;
+                auto pProp = std::find_if(aProps.begin(), aProps.end(),
+                    [&rValue](const beans::Property& rProp) { return rProp.Name == rValue.Name; });
+                if (pProp != aProps.end())
+                    nAttribs = pProp->Attributes;
+
+                try
+                {
+                    xNewPropContainer->addProperty(
+                        rValue.Name, nAttribs, rValue.Value );
+                }
+                catch ( beans::PropertyExistException & )
+                {
+                }
+                   catch ( beans::IllegalTypeException & )
+                {
+                }
+                catch ( lang::IllegalArgumentException & )
+                {
+                }
+            }
+        }
+    }
+    return true;
+}
+
+bool ContentProviderImplHelper::removeAdditionalPropertySet(
+    const OUString& rKey, bool bRecursive )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( bRecursive )
+    {
+        // Get propertyset registry.
+        getAdditionalPropertySetRegistry();
+
+        if ( !m_pImpl->m_xPropertySetRegistry.is() )
+            return false;
+
+        uno::Reference< container::XNameAccess > xNameAccess(
+            m_pImpl->m_xPropertySetRegistry, uno::UNO_QUERY );
+        if ( !xNameAccess.is() )
+            return false;
+
+        const uno::Sequence< OUString > aKeys
+            = xNameAccess->getElementNames();
+        if ( aKeys.hasElements() )
+        {
+            OUString aKeyWithSlash = rKey;
+            OUString aKeyWithoutSlash;
+            if ( !aKeyWithSlash.endsWith("/") )
+            {
+                aKeyWithSlash += "/";
+                aKeyWithoutSlash = rKey;
+            }
+            else if ( !rKey.isEmpty() )
+                aKeyWithoutSlash
+                    = rKey.copy( 0, rKey.getLength() - 1 );
+
+            for ( const OUString& rCurrKey : aKeys )
+            {
+                if ( rCurrKey.startsWith(aKeyWithSlash )
+                     || rCurrKey == aKeyWithoutSlash )
+                {
+                    if ( !removeAdditionalPropertySet(
+                             rCurrKey, false ) )
+                        return false;
+                }
+            }
+        }
+    }
+    else
+    {
+        // Get propertyset registry.
+        getAdditionalPropertySetRegistry();
+
+        if ( !m_pImpl->m_xPropertySetRegistry.is() )
+            return false;
+
+        m_pImpl->m_xPropertySetRegistry->removePropertySet( rKey );
+    }
+    return true;
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/registerucb.cxx b/ucbhelper/source/provider/registerucb.cxx
new file mode 100644
index 000000000..842fc0083
--- /dev/null
+++ b/ucbhelper/source/provider/registerucb.cxx
@@ -0,0 +1,143 @@
+/* -*- 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 <ucbhelper/registerucb.hxx>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/ucb/DuplicateProviderException.hpp>
+#include <com/sun/star/ucb/XContentProviderManager.hpp>
+#include <com/sun/star/ucb/XParameterizedContentProvider.hpp>
+#include <com/sun/star/ucb/ContentProviderProxyFactory.hpp>
+#include <com/sun/star/ucb/XContentProviderFactory.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/uno/RuntimeException.hpp>
+
+#include <osl/diagnose.h>
+
+using namespace com::sun::star;
+
+namespace ucbhelper {
+
+
+//  registerAtUcb
+
+
+bool
+registerAtUcb(
+    uno::Reference< ucb::XContentProviderManager > const & rManager,
+    uno::Reference< uno::XComponentContext > const & rxContext,
+    OUString const & rName,
+    OUString const & rArguments,
+    OUString const & rTemplate)
+{
+    OSL_ENSURE(rxContext.is(),
+               "ucb::registerAtUcb(): No service factory");
+
+    bool bNoProxy = rArguments.startsWith("{noproxy}");
+    OUString
+        aProviderArguments(bNoProxy ?
+                               rArguments.
+                                   copy(RTL_CONSTASCII_LENGTH("{noproxy}")) :
+                               rArguments);
+
+    uno::Reference< ucb::XContentProvider > xProvider;
+
+    if (!rName.isEmpty())
+    {
+        // First, try to instantiate proxy for provider:
+        if (!bNoProxy)
+        {
+            uno::Reference< ucb::XContentProviderFactory > xProxyFactory;
+            try
+            {
+                xProxyFactory = ucb::ContentProviderProxyFactory::create( rxContext );
+            }
+            catch (uno::Exception const &) {}
+            OSL_ENSURE(xProxyFactory.is(), "No ContentProviderProxyFactory");
+            if (xProxyFactory.is())
+                xProvider = xProxyFactory->createContentProvider(rName);
+        }
+
+        // Then, try to instantiate provider directly:
+        if (!xProvider.is())
+            try
+            {
+                xProvider.set(
+                    rxContext->getServiceManager()->createInstanceWithContext(rName, rxContext),
+                    uno::UNO_QUERY);
+            }
+            catch (uno::RuntimeException const &) { throw; }
+            catch (uno::Exception const &) {}
+    }
+
+    uno::Reference< ucb::XParameterizedContentProvider >
+        xParameterized(xProvider, uno::UNO_QUERY);
+    if (xParameterized.is())
+    {
+        uno::Reference< ucb::XContentProvider > xInstance;
+        try
+        {
+            xInstance = xParameterized->registerInstance(rTemplate,
+                                                         aProviderArguments,
+                                                         true);
+                //@@@ if this call replaces an old instance, the commit-or-
+                // rollback code below will not work
+        }
+        catch (lang::IllegalArgumentException const &) {}
+
+        if (xInstance.is())
+            xProvider = xInstance;
+    }
+
+    bool bSuccess = false;
+    if (rManager.is() && (rName.isEmpty() || xProvider.is()))
+    {
+        try
+        {
+            rManager->registerContentProvider(xProvider, rTemplate, true);
+            bSuccess = true;
+        }
+        catch (ucb::DuplicateProviderException const &)
+        {
+            if (xParameterized.is())
+                try
+                {
+                    xParameterized->deregisterInstance(rTemplate,
+                                                       aProviderArguments);
+                }
+                catch (lang::IllegalArgumentException const &) {}
+        }
+        catch (...)
+        {
+            if (xParameterized.is())
+                try
+                {
+                    xParameterized->deregisterInstance(rTemplate,
+                                                       aProviderArguments);
+                }
+                catch (lang::IllegalArgumentException const &) {}
+                catch (uno::RuntimeException const &) {}
+            throw;
+        }
+    }
+    return bSuccess;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/resultset.cxx b/ucbhelper/source/provider/resultset.cxx
new file mode 100644
index 000000000..eff10d5d2
--- /dev/null
+++ b/ucbhelper/source/provider/resultset.cxx
@@ -0,0 +1,1495 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+#include <memory>
+#include <mutex>
+#include <comphelper/interfacecontainer4.hxx>
+#include <comphelper/multiinterfacecontainer4.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <com/sun/star/beans/PropertyAttribute.hpp>
+#include <com/sun/star/sdbc/SQLException.hpp>
+#include <ucbhelper/resultset.hxx>
+#include <ucbhelper/resultsetmetadata.hxx>
+#include <ucbhelper/macros.hxx>
+#include <osl/diagnose.h>
+
+using namespace com::sun::star;
+
+
+namespace ucbhelper_impl
+{
+
+namespace {
+
+struct PropertyInfo
+{
+    const char* pName;
+    sal_Int32   nHandle;
+    sal_Int16   nAttributes;
+    const uno::Type& (*pGetCppuType)();
+};
+
+}
+
+static const uno::Type& sal_Int32_getCppuType()
+{
+    return cppu::UnoType<sal_Int32>::get();
+}
+
+static const uno::Type& sal_Bool_getCppuType()
+{
+    return cppu::UnoType<bool>::get();
+}
+
+const PropertyInfo aPropertyTable[] =
+{
+    { "IsRowCountFinal",
+      1000,
+      beans::PropertyAttribute::BOUND | beans::PropertyAttribute::READONLY,
+      &sal_Bool_getCppuType
+    },
+    { "RowCount",
+      1001,
+      beans::PropertyAttribute::BOUND | beans::PropertyAttribute::READONLY,
+      &sal_Int32_getCppuType
+    },
+    { nullptr,
+      0,
+      0,
+      nullptr
+    }
+};
+
+#define RESULTSET_PROPERTY_COUNT 2
+
+
+
+namespace {
+
+class PropertySetInfo :
+        public cppu::OWeakObject,
+        public lang::XTypeProvider,
+        public beans::XPropertySetInfo
+{
+    uno::Sequence< beans::Property >  m_aProps;
+
+private:
+    bool queryProperty(
+        std::u16string_view aName, beans::Property& rProp ) const;
+
+public:
+    PropertySetInfo(
+        const PropertyInfo* pProps,
+        sal_Int32 nProps );
+
+    // XInterface
+    virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type & rType ) override;
+    virtual void SAL_CALL acquire()
+        noexcept override;
+    virtual void SAL_CALL release()
+        noexcept override;
+
+    // XTypeProvider
+    virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId() override;
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes() override;
+
+    // XPropertySetInfo
+    virtual uno::Sequence< beans::Property > SAL_CALL getProperties() override;
+    virtual beans::Property SAL_CALL getPropertyByName(
+            const OUString& aName ) override;
+    virtual sal_Bool SAL_CALL hasPropertyByName( const OUString& Name ) override;
+};
+
+}
+
+typedef comphelper::OMultiTypeInterfaceContainerHelperVar4<OUString, css::beans::XPropertyChangeListener>
+    PropertyChangeListeners;
+
+} // namespace ucbhelper_impl
+
+using namespace ucbhelper_impl;
+
+namespace ucbhelper
+{
+
+
+// struct ResultSet_Impl.
+
+
+struct ResultSet_Impl
+{
+    uno::Reference< uno::XComponentContext >        m_xContext;
+    uno::Reference< css::ucb::XCommandEnvironment > m_xEnv;
+    uno::Reference< beans::XPropertySetInfo >       m_xPropSetInfo;
+    uno::Reference< sdbc::XResultSetMetaData >      m_xMetaData;
+    uno::Sequence< beans::Property >                m_aProperties;
+    rtl::Reference< ResultSetDataSupplier >         m_xDataSupplier;
+    std::mutex                          m_aMutex;
+    comphelper::OInterfaceContainerHelper4<lang::XEventListener> m_aDisposeEventListeners;
+    std::unique_ptr<PropertyChangeListeners>        m_pPropertyChangeListeners;
+    sal_Int32                           m_nPos;
+    bool                            m_bWasNull;
+    bool                            m_bAfterLast;
+
+    inline ResultSet_Impl(
+        const uno::Reference< uno::XComponentContext >& rxContext,
+        const uno::Sequence< beans::Property >& rProperties,
+        const rtl::Reference< ResultSetDataSupplier >& rDataSupplier,
+        const uno::Reference< css::ucb::XCommandEnvironment >& rxEnv );
+};
+
+inline ResultSet_Impl::ResultSet_Impl(
+    const uno::Reference< uno::XComponentContext >& rxContext,
+    const uno::Sequence< beans::Property >& rProperties,
+    const rtl::Reference< ResultSetDataSupplier >& rDataSupplier,
+    const uno::Reference< css::ucb::XCommandEnvironment >& rxEnv )
+: m_xContext( rxContext ),
+  m_xEnv( rxEnv ),
+  m_aProperties( rProperties ),
+  m_xDataSupplier( rDataSupplier ),
+  m_nPos( 0 ), // Position is one-based. Zero means: before first element.
+  m_bWasNull( false ),
+  m_bAfterLast( false )
+{
+}
+
+
+// ResultSet Implementation.
+
+
+ResultSet::ResultSet(
+    const uno::Reference< uno::XComponentContext >& rxContext,
+    const uno::Sequence< beans::Property >& rProperties,
+    const rtl::Reference< ResultSetDataSupplier >& rDataSupplier )
+: m_pImpl( new ResultSet_Impl(
+               rxContext,
+               rProperties,
+               rDataSupplier,
+               uno::Reference< css::ucb::XCommandEnvironment >() ) )
+{
+    rDataSupplier->m_pResultSet = this;
+}
+
+
+ResultSet::ResultSet(
+    const uno::Reference< uno::XComponentContext >& rxContext,
+    const uno::Sequence< beans::Property >& rProperties,
+    const rtl::Reference< ResultSetDataSupplier >& rDataSupplier,
+    const uno::Reference< css::ucb::XCommandEnvironment >& rxEnv )
+: m_pImpl( new ResultSet_Impl( rxContext, rProperties, rDataSupplier, rxEnv ) )
+{
+    rDataSupplier->m_pResultSet = this;
+}
+
+
+// virtual
+ResultSet::~ResultSet()
+{
+}
+
+
+// XServiceInfo methods.
+
+OUString SAL_CALL ResultSet::getImplementationName()
+{
+    return "ResultSet";
+}
+
+sal_Bool SAL_CALL ResultSet::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService( this, ServiceName );
+}
+
+css::uno::Sequence< OUString > SAL_CALL ResultSet::getSupportedServiceNames()
+{
+    return { RESULTSET_SERVICE_NAME };
+}
+
+
+// XComponent methods.
+
+
+// virtual
+void SAL_CALL ResultSet::dispose()
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( m_pImpl->m_aDisposeEventListeners.getLength(aGuard) )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source = static_cast< lang::XComponent * >( this );
+        m_pImpl->m_aDisposeEventListeners.disposeAndClear( aGuard, aEvt );
+    }
+
+    if ( m_pImpl->m_pPropertyChangeListeners )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source = static_cast< beans::XPropertySet * >( this );
+        m_pImpl->m_pPropertyChangeListeners->disposeAndClear( aGuard, aEvt );
+    }
+
+    m_pImpl->m_xDataSupplier->close();
+}
+
+
+// virtual
+void SAL_CALL ResultSet::addEventListener(
+        const uno::Reference< lang::XEventListener >& Listener )
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    m_pImpl->m_aDisposeEventListeners.addInterface( aGuard, Listener );
+}
+
+
+// virtual
+void SAL_CALL ResultSet::removeEventListener(
+        const uno::Reference< lang::XEventListener >& Listener )
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    m_pImpl->m_aDisposeEventListeners.removeInterface( aGuard, Listener );
+}
+
+
+// XResultSetMetaDataSupplier methods.
+
+
+// virtual
+uno::Reference< sdbc::XResultSetMetaData > SAL_CALL ResultSet::getMetaData()
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( !m_pImpl->m_xMetaData.is() )
+        m_pImpl->m_xMetaData = new ResultSetMetaData( m_pImpl->m_xContext,
+                                                      m_pImpl->m_aProperties );
+
+    return m_pImpl->m_xMetaData;
+}
+
+
+// XResultSet methods.
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::next()
+{
+    // Note: Cursor is initially positioned before the first row.
+    //       First call to 'next()' moves it to first row.
+
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( m_pImpl->m_bAfterLast )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    // getResult works zero-based!
+    if ( !m_pImpl->m_xDataSupplier->getResult( m_pImpl->m_nPos ) )
+    {
+        m_pImpl->m_bAfterLast = true;
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    m_pImpl->m_nPos++;
+    m_pImpl->m_xDataSupplier->validate();
+    return true;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::isBeforeFirst()
+{
+    if ( m_pImpl->m_bAfterLast )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    // getResult works zero-based!
+    if ( !m_pImpl->m_xDataSupplier->getResult( 0 ) )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return ( m_pImpl->m_nPos == 0 );
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::isAfterLast()
+{
+    m_pImpl->m_xDataSupplier->validate();
+    return m_pImpl->m_bAfterLast;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::isFirst()
+{
+    if ( m_pImpl->m_bAfterLast )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return ( m_pImpl->m_nPos == 1 );
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::isLast()
+{
+    if ( m_pImpl->m_bAfterLast )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    sal_Int32 nCount = m_pImpl->m_xDataSupplier->totalCount();
+    if ( !nCount )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return false;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return ( m_pImpl->m_nPos == nCount );
+}
+
+
+// virtual
+void SAL_CALL ResultSet::beforeFirst()
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+    m_pImpl->m_bAfterLast = false;
+    m_pImpl->m_nPos = 0;
+    m_pImpl->m_xDataSupplier->validate();
+}
+
+
+// virtual
+void SAL_CALL ResultSet::afterLast()
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+    m_pImpl->m_bAfterLast = true;
+    m_pImpl->m_xDataSupplier->validate();
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::first()
+{
+    // getResult works zero-based!
+    if ( m_pImpl->m_xDataSupplier->getResult( 0 ) )
+    {
+        std::unique_lock aGuard( m_pImpl->m_aMutex );
+        m_pImpl->m_bAfterLast = false;
+        m_pImpl->m_nPos = 1;
+        m_pImpl->m_xDataSupplier->validate();
+        return true;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::last()
+{
+    sal_Int32 nCount = m_pImpl->m_xDataSupplier->totalCount();
+    if ( nCount )
+    {
+        std::unique_lock aGuard( m_pImpl->m_aMutex );
+        m_pImpl->m_bAfterLast = false;
+        m_pImpl->m_nPos = nCount;
+        m_pImpl->m_xDataSupplier->validate();
+        return true;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSet::getRow()
+{
+    if ( m_pImpl->m_bAfterLast )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return 0;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return m_pImpl->m_nPos;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::absolute( sal_Int32 row )
+{
+/*
+    If the row number is positive, the cursor moves to the given row number
+    with respect to the beginning of the result set. The first row is row 1,
+    the second is row 2, and so on.
+
+    If the given row number is negative, the cursor moves to an absolute row
+    position with respect to the end of the result set. For example, calling
+    absolute( -1 ) positions the cursor on the last row, absolute( -2 )
+    indicates the next-to-last row, and so on.
+
+    An attempt to position the cursor beyond the first/last row in the result
+    set leaves the cursor before/after the first/last row, respectively.
+
+    Calling absolute( 1 ) is the same as calling first().
+
+    Calling absolute( -1 ) is the same as calling last().
+*/
+    if ( row < 0 )
+    {
+        sal_Int32 nCount = m_pImpl->m_xDataSupplier->totalCount();
+
+        if ( ( row * -1 ) > nCount )
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = false;
+            m_pImpl->m_nPos = 0;
+            m_pImpl->m_xDataSupplier->validate();
+            return false;
+        }
+        else // |row| <= nCount
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = false;
+            m_pImpl->m_nPos = ( nCount + row + 1 );
+            m_pImpl->m_xDataSupplier->validate();
+            return true;
+        }
+    }
+    else if ( row == 0 )
+    {
+        // @throws SQLException
+        //      ... if row is 0 ...
+        throw sdbc::SQLException();
+    }
+    else // row > 0
+    {
+        sal_Int32 nCount = m_pImpl->m_xDataSupplier->totalCount();
+
+        if ( row <= nCount )
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = false;
+            m_pImpl->m_nPos = row;
+            m_pImpl->m_xDataSupplier->validate();
+            return true;
+        }
+        else // row > nCount
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = true;
+            m_pImpl->m_xDataSupplier->validate();
+            return false;
+        }
+    }
+
+    // unreachable...
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::relative( sal_Int32 rows )
+{
+/*
+    Attempting to move beyond the first/last row in the result set
+    positions the cursor before/after the first/last row.
+
+    Calling relative( 0 ) is valid, but does not change the cursor position.
+
+    Calling relative( 1 ) is different from calling next() because it makes
+    sense to call next() when there is no current row, for example, when
+    the cursor is positioned before the first row or after the last row of
+    the result set.
+*/
+    if ( m_pImpl->m_bAfterLast || ( m_pImpl->m_nPos == 0 ) )
+    {
+        // "No current row".
+        throw sdbc::SQLException();
+    }
+
+    if ( rows < 0 )
+    {
+        if ( ( m_pImpl->m_nPos + rows ) > 0 )
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = false;
+            m_pImpl->m_nPos = ( m_pImpl->m_nPos + rows );
+            m_pImpl->m_xDataSupplier->validate();
+            return true;
+        }
+        else
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = false;
+            m_pImpl->m_nPos = 0;
+            m_pImpl->m_xDataSupplier->validate();
+            return false;
+        }
+    }
+    else if ( rows == 0 )
+    {
+        // nop.
+        m_pImpl->m_xDataSupplier->validate();
+        return true;
+    }
+    else // rows > 0
+    {
+        sal_Int32 nCount = m_pImpl->m_xDataSupplier->totalCount();
+        if ( ( m_pImpl->m_nPos + rows ) <= nCount )
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = false;
+            m_pImpl->m_nPos = ( m_pImpl->m_nPos + rows );
+            m_pImpl->m_xDataSupplier->validate();
+            return true;
+        }
+        else
+        {
+            std::unique_lock aGuard( m_pImpl->m_aMutex );
+            m_pImpl->m_bAfterLast = true;
+            m_pImpl->m_xDataSupplier->validate();
+            return false;
+        }
+    }
+
+    // unreachable...
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::previous()
+{
+/*
+    previous() is not the same as relative( -1 ) because it makes sense
+    to call previous() when there is no current row.
+*/
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( m_pImpl->m_bAfterLast )
+    {
+        m_pImpl->m_bAfterLast = false;
+        sal_Int32 nCount = m_pImpl->m_xDataSupplier->totalCount();
+        m_pImpl->m_nPos = nCount;
+    }
+    else if ( m_pImpl->m_nPos )
+        m_pImpl->m_nPos--;
+
+    if ( m_pImpl->m_nPos )
+    {
+        m_pImpl->m_xDataSupplier->validate();
+        return true;
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+void SAL_CALL ResultSet::refreshRow()
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+    if ( m_pImpl->m_bAfterLast || ( m_pImpl->m_nPos == 0 ) )
+        return;
+
+    m_pImpl->m_xDataSupplier->releasePropertyValues( m_pImpl->m_nPos );
+    m_pImpl->m_xDataSupplier->validate();
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::rowUpdated()
+{
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::rowInserted()
+{
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::rowDeleted()
+{
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+uno::Reference< uno::XInterface > SAL_CALL ResultSet::getStatement()
+{
+/*
+    returns the Statement that produced this ResultSet object. If the
+    result set was generated some other way, ... this method returns null.
+*/
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< uno::XInterface >();
+}
+
+
+// XRow methods.
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::wasNull()
+{
+    // This method can not be implemented correctly!!! Imagine different
+    // threads doing a getXYZ - wasNull calling sequence on the same
+    // implementation object...
+
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->wasNull();
+        }
+    }
+
+    m_pImpl->m_xDataSupplier->validate();
+    return m_pImpl->m_bWasNull;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSet::getString( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getString( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return OUString();
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSet::getBoolean( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getBoolean( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return false;
+}
+
+
+// virtual
+sal_Int8 SAL_CALL ResultSet::getByte( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getByte( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return 0;
+}
+
+
+// virtual
+sal_Int16 SAL_CALL ResultSet::getShort( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getShort( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return 0;
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSet::getInt( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getInt( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return 0;
+}
+
+
+// virtual
+sal_Int64 SAL_CALL ResultSet::getLong( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getLong( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return 0;
+}
+
+
+// virtual
+float SAL_CALL ResultSet::getFloat( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getFloat( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return 0;
+}
+
+
+// virtual
+double SAL_CALL ResultSet::getDouble( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getDouble( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return 0;
+}
+
+
+// virtual
+uno::Sequence< sal_Int8 > SAL_CALL
+ResultSet::getBytes( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getBytes( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Sequence< sal_Int8 >();
+}
+
+
+// virtual
+util::Date SAL_CALL ResultSet::getDate( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getDate( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return util::Date();
+}
+
+
+// virtual
+util::Time SAL_CALL ResultSet::getTime( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getTime( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return util::Time();
+}
+
+
+// virtual
+util::DateTime SAL_CALL
+ResultSet::getTimestamp( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getTimestamp( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return util::DateTime();
+}
+
+
+// virtual
+uno::Reference< io::XInputStream > SAL_CALL
+ResultSet::getBinaryStream( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getBinaryStream( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< io::XInputStream >();
+}
+
+
+// virtual
+uno::Reference< io::XInputStream > SAL_CALL
+ResultSet::getCharacterStream( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getCharacterStream( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< io::XInputStream >();
+}
+
+
+// virtual
+uno::Any SAL_CALL ResultSet::getObject(
+        sal_Int32 columnIndex,
+        const uno::Reference< container::XNameAccess >& typeMap )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getObject( columnIndex, typeMap );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Any();
+}
+
+
+// virtual
+uno::Reference< sdbc::XRef > SAL_CALL
+ResultSet::getRef( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getRef( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< sdbc::XRef >();
+}
+
+
+// virtual
+uno::Reference< sdbc::XBlob > SAL_CALL
+ResultSet::getBlob( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getBlob( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< sdbc::XBlob >();
+}
+
+
+// virtual
+uno::Reference< sdbc::XClob > SAL_CALL
+ResultSet::getClob( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getClob( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< sdbc::XClob >();
+}
+
+
+// virtual
+uno::Reference< sdbc::XArray > SAL_CALL
+ResultSet::getArray( sal_Int32 columnIndex )
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+    {
+        uno::Reference< sdbc::XRow > xValues
+            = m_pImpl->m_xDataSupplier->queryPropertyValues(
+                                                        m_pImpl->m_nPos - 1 );
+        if ( xValues.is() )
+        {
+            m_pImpl->m_bWasNull = false;
+            m_pImpl->m_xDataSupplier->validate();
+            return xValues->getArray( columnIndex );
+        }
+    }
+
+    m_pImpl->m_bWasNull = true;
+    m_pImpl->m_xDataSupplier->validate();
+    return uno::Reference< sdbc::XArray >();
+}
+
+
+// XCloseable methods.
+
+
+// virtual
+void SAL_CALL ResultSet::close()
+{
+    m_pImpl->m_xDataSupplier->close();
+    m_pImpl->m_xDataSupplier->validate();
+}
+
+
+// XContentAccess methods.
+
+
+// virtual
+OUString SAL_CALL ResultSet::queryContentIdentifierString()
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+        return m_pImpl->m_xDataSupplier->queryContentIdentifierString(
+                                                        m_pImpl->m_nPos - 1 );
+
+    return OUString();
+}
+
+
+// virtual
+uno::Reference< css::ucb::XContentIdentifier > SAL_CALL
+ResultSet::queryContentIdentifier()
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+        return m_pImpl->m_xDataSupplier->queryContentIdentifier(
+                                                        m_pImpl->m_nPos - 1 );
+
+    return uno::Reference< css::ucb::XContentIdentifier >();
+}
+
+
+// virtual
+uno::Reference< css::ucb::XContent > SAL_CALL
+ResultSet::queryContent()
+{
+    if ( m_pImpl->m_nPos && !m_pImpl->m_bAfterLast )
+        return m_pImpl->m_xDataSupplier->queryContent( m_pImpl->m_nPos - 1 );
+
+    return uno::Reference< css::ucb::XContent >();
+}
+
+
+// XPropertySet methods.
+
+
+// virtual
+uno::Reference< beans::XPropertySetInfo > SAL_CALL
+ResultSet::getPropertySetInfo()
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( !m_pImpl->m_xPropSetInfo.is() )
+        m_pImpl->m_xPropSetInfo
+            = new PropertySetInfo( aPropertyTable,
+                                   RESULTSET_PROPERTY_COUNT );
+    return m_pImpl->m_xPropSetInfo;
+}
+
+
+// virtual
+void SAL_CALL ResultSet::setPropertyValue( const OUString& aPropertyName,
+                                           const uno::Any& )
+{
+    if ( aPropertyName == "RowCount" )
+    {
+        // property is read-only.
+        throw lang::IllegalArgumentException();
+    }
+    else if ( aPropertyName == "IsRowCountFinal" )
+    {
+        // property is read-only.
+        throw lang::IllegalArgumentException();
+    }
+    else
+    {
+        throw beans::UnknownPropertyException(aPropertyName);
+    }
+}
+
+
+// virtual
+uno::Any SAL_CALL ResultSet::getPropertyValue(
+        const OUString& PropertyName )
+{
+    uno::Any aValue;
+
+    if ( PropertyName == "RowCount" )
+    {
+        aValue <<= m_pImpl->m_xDataSupplier->currentCount();
+    }
+    else if ( PropertyName == "IsRowCountFinal" )
+    {
+        aValue <<= m_pImpl->m_xDataSupplier->isCountFinal();
+    }
+    else
+    {
+        throw beans::UnknownPropertyException(PropertyName);
+    }
+
+    return aValue;
+}
+
+
+// virtual
+void SAL_CALL ResultSet::addPropertyChangeListener(
+        const OUString& aPropertyName,
+        const uno::Reference< beans::XPropertyChangeListener >& xListener )
+{
+    // Note: An empty property name means a listener for "all" properties.
+
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( !aPropertyName.isEmpty() &&
+         aPropertyName != "RowCount" &&
+         aPropertyName != "IsRowCountFinal" )
+        throw beans::UnknownPropertyException(aPropertyName);
+
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        m_pImpl->m_pPropertyChangeListeners.reset(
+             new PropertyChangeListeners());
+
+    m_pImpl->m_pPropertyChangeListeners->addInterface(aGuard,
+                                                aPropertyName, xListener );
+}
+
+
+// virtual
+void SAL_CALL ResultSet::removePropertyChangeListener(
+        const OUString& aPropertyName,
+        const uno::Reference< beans::XPropertyChangeListener >& xListener )
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( !aPropertyName.isEmpty() &&
+         aPropertyName != "RowCount" &&
+         aPropertyName != "IsRowCountFinal" )
+        throw beans::UnknownPropertyException(aPropertyName);
+
+    if ( m_pImpl->m_pPropertyChangeListeners )
+        m_pImpl->m_pPropertyChangeListeners->removeInterface(aGuard,
+                                                    aPropertyName, xListener );
+
+}
+
+
+// virtual
+void SAL_CALL ResultSet::addVetoableChangeListener(
+        const OUString&,
+        const uno::Reference< beans::XVetoableChangeListener >& )
+{
+    //  No constrained props, at the moment.
+}
+
+
+// virtual
+void SAL_CALL ResultSet::removeVetoableChangeListener(
+        const OUString&,
+        const uno::Reference< beans::XVetoableChangeListener >& )
+{
+    //  No constrained props, at the moment.
+}
+
+
+// Non-interface methods.
+
+
+void ResultSet::propertyChanged( const beans::PropertyChangeEvent& rEvt ) const
+{
+    std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        return;
+
+    // Notify listeners interested especially in the changed property.
+    comphelper::OInterfaceContainerHelper4<beans::XPropertyChangeListener>* pPropsContainer
+        = m_pImpl->m_pPropertyChangeListeners->getContainer(
+                                                        rEvt.PropertyName );
+    if ( pPropsContainer )
+    {
+        pPropsContainer->notifyEach(aGuard, &beans::XPropertyChangeListener::propertyChange, rEvt);
+    }
+
+    // Notify listeners interested in all properties.
+    pPropsContainer
+        = m_pImpl->m_pPropertyChangeListeners->getContainer( OUString() );
+    if ( pPropsContainer )
+    {
+        comphelper::OInterfaceIteratorHelper4 aIter( aGuard, *pPropsContainer );
+        while ( aIter.hasMoreElements() )
+        {
+            aIter.next()->propertyChange( rEvt );
+        }
+    }
+}
+
+
+void ResultSet::rowCountChanged( sal_uInt32 nOld, sal_uInt32 nNew )
+{
+    OSL_ENSURE( nOld < nNew, "ResultSet::rowCountChanged - nOld >= nNew!" );
+
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        return;
+
+    propertyChanged(
+        beans::PropertyChangeEvent(
+            static_cast< cppu::OWeakObject * >( this ),
+            "RowCount",
+            false,
+            1001,
+            uno::Any( nOld ),     // old value
+            uno::Any( nNew ) ) ); // new value
+}
+
+
+void ResultSet::rowCountFinal()
+{
+    if ( !m_pImpl->m_pPropertyChangeListeners )
+        return;
+
+    propertyChanged(
+        beans::PropertyChangeEvent(
+            static_cast< cppu::OWeakObject * >( this ),
+            "IsRowCountFinal",
+            false,
+            1000,
+            uno:: Any( false ),   // old value
+            uno::Any( true ) ) ); // new value
+}
+
+
+const uno::Sequence< beans::Property >& ResultSet::getProperties() const
+{
+    return m_pImpl->m_aProperties;
+}
+
+
+const uno::Reference< css::ucb::XCommandEnvironment >&
+ResultSet::getEnvironment() const
+{
+    return m_pImpl->m_xEnv;
+}
+
+} // namespace ucbhelper
+
+namespace ucbhelper_impl {
+
+
+// PropertySetInfo Implementation.
+
+
+PropertySetInfo::PropertySetInfo(
+    const PropertyInfo* pProps,
+    sal_Int32 nProps )
+    : m_aProps( nProps )
+{
+
+    if ( !nProps )
+        return;
+
+    const PropertyInfo* pEntry = pProps;
+    beans::Property* pProperties = m_aProps.getArray();
+
+    for ( sal_Int32 n = 0; n < nProps; ++n )
+    {
+        beans::Property& rProp = pProperties[ n ];
+
+        rProp.Name       = OUString::createFromAscii( pEntry->pName );
+        rProp.Handle     = pEntry->nHandle;
+        rProp.Type       = pEntry->pGetCppuType();
+        rProp.Attributes = pEntry->nAttributes;
+
+        pEntry++;
+    }
+}
+
+
+
+// XInterface methods.
+void SAL_CALL PropertySetInfo::acquire()
+    noexcept
+{
+    OWeakObject::acquire();
+}
+
+void SAL_CALL PropertySetInfo::release()
+    noexcept
+{
+    OWeakObject::release();
+}
+
+css::uno::Any SAL_CALL PropertySetInfo::queryInterface(
+                                const css::uno::Type & rType )
+{
+    css::uno::Any aRet = cppu::queryInterface( rType,
+                                               static_cast< lang::XTypeProvider* >(this),
+                                               static_cast< beans::XPropertySetInfo* >(this)
+                                               );
+    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
+}
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_IMPL_2( PropertySetInfo,
+                         lang::XTypeProvider,
+                         beans::XPropertySetInfo );
+
+
+// XPropertySetInfo methods.
+
+
+// virtual
+uno::Sequence< beans::Property > SAL_CALL PropertySetInfo::getProperties()
+{
+    return m_aProps;
+}
+
+
+// virtual
+beans::Property SAL_CALL PropertySetInfo::getPropertyByName(
+        const OUString& aName )
+{
+    beans::Property aProp;
+    if ( queryProperty( aName, aProp ) )
+        return aProp;
+
+    throw beans::UnknownPropertyException(aName);
+}
+
+
+// virtual
+sal_Bool SAL_CALL PropertySetInfo::hasPropertyByName(
+        const OUString& Name )
+{
+    beans::Property aProp;
+    return queryProperty( Name, aProp );
+}
+
+
+bool PropertySetInfo::queryProperty(
+    std::u16string_view aName, beans::Property& rProp ) const
+{
+    sal_Int32 nCount = m_aProps.getLength();
+    const beans::Property* pProps = m_aProps.getConstArray();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const beans::Property& rCurr = pProps[ n ];
+        if ( rCurr.Name == aName )
+        {
+            rProp = rCurr;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+} // namespace ucbhelper_impl
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/resultsethelper.cxx b/ucbhelper/source/provider/resultsethelper.cxx
new file mode 100644
index 000000000..60f8977d1
--- /dev/null
+++ b/ucbhelper/source/provider/resultsethelper.cxx
@@ -0,0 +1,254 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ - This implementation is far away from completion. It has no interface
+   for changes notifications etc.
+
+ *************************************************************************/
+#include <com/sun/star/ucb/ListActionType.hpp>
+#include <com/sun/star/ucb/ListenerAlreadySetException.hpp>
+#include <com/sun/star/ucb/ServiceNotFoundException.hpp>
+#include <com/sun/star/ucb/WelcomeDynamicResultSetStruct.hpp>
+#include <com/sun/star/ucb/CachedDynamicResultSetStubFactory.hpp>
+#include <com/sun/star/ucb/XSourceInitialization.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <ucbhelper/resultsethelper.hxx>
+
+#include <osl/diagnose.h>
+
+using namespace com::sun::star;
+
+
+// ResultSetImplHelper Implementation.
+
+
+namespace ucbhelper {
+
+
+ResultSetImplHelper::ResultSetImplHelper(
+    const uno::Reference< uno::XComponentContext >& rxContext,
+    const css::ucb::OpenCommandArgument2& rCommand )
+: m_bStatic( false ),
+  m_bInitDone( false ),
+  m_aCommand( rCommand ),
+  m_xContext( rxContext )
+{
+}
+
+
+// virtual
+ResultSetImplHelper::~ResultSetImplHelper()
+{
+}
+
+
+// XServiceInfo methods.
+
+OUString SAL_CALL ResultSetImplHelper::getImplementationName()
+{
+    return "ResultSetImplHelper";
+}
+
+sal_Bool SAL_CALL ResultSetImplHelper::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService( this, ServiceName );
+}
+
+css::uno::Sequence< OUString > SAL_CALL ResultSetImplHelper::getSupportedServiceNames()
+{
+    return { DYNAMICRESULTSET_SERVICE_NAME };
+}
+
+// XComponent methods.
+
+
+// virtual
+void SAL_CALL ResultSetImplHelper::dispose()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( m_aDisposeEventListeners.getLength(aGuard) )
+    {
+        lang::EventObject aEvt;
+        aEvt.Source = static_cast< lang::XComponent * >( this );
+        m_aDisposeEventListeners.disposeAndClear( aGuard, aEvt );
+    }
+}
+
+
+// virtual
+void SAL_CALL ResultSetImplHelper::addEventListener(
+        const uno::Reference< lang::XEventListener >& Listener )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    m_aDisposeEventListeners.addInterface( aGuard, Listener );
+}
+
+
+// virtual
+void SAL_CALL ResultSetImplHelper::removeEventListener(
+        const uno::Reference< lang::XEventListener >& Listener )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    m_aDisposeEventListeners.removeInterface( aGuard, Listener );
+}
+
+
+// XDynamicResultSet methods.
+
+
+// virtual
+uno::Reference< sdbc::XResultSet > SAL_CALL
+ResultSetImplHelper::getStaticResultSet()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( m_xListener.is() )
+        throw css::ucb::ListenerAlreadySetException();
+
+    init( true );
+    return m_xResultSet1;
+}
+
+
+// virtual
+void SAL_CALL ResultSetImplHelper::setListener(
+        const uno::Reference< css::ucb::XDynamicResultSetListener >& Listener )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( m_bStatic || m_xListener.is() )
+        throw css::ucb::ListenerAlreadySetException();
+
+    m_xListener = Listener;
+
+
+    // Create "welcome event" and send it to listener.
+
+
+    // Note: We only have the implementation for a static result set at the
+    //       moment (src590). The dynamic result sets passed to the listener
+    //       are a fake. This implementation will never call "notify" at the
+    //       listener to propagate any changes!!!
+
+    init( false );
+
+    uno::Any aInfo;
+    aInfo <<= css::ucb::WelcomeDynamicResultSetStruct(
+        m_xResultSet1 /* "old" */,
+        m_xResultSet2 /* "new" */ );
+
+    uno::Sequence< css::ucb::ListAction > aActions {
+         css::ucb::ListAction(
+            0, // Position; not used
+            0, // Count; not used
+            css::ucb::ListActionType::WELCOME,
+            aInfo ) };
+    aGuard.unlock();
+
+    Listener->notify(
+        css::ucb::ListEvent(
+            static_cast< cppu::OWeakObject * >( this ), aActions ) );
+}
+
+
+// virtual
+sal_Int16 SAL_CALL ResultSetImplHelper::getCapabilities()
+{
+    // ! css::ucb::ContentResultSetCapability::SORTED
+    return 0;
+}
+
+
+// virtual
+void SAL_CALL ResultSetImplHelper::connectToCache(
+        const uno::Reference< css::ucb::XDynamicResultSet > & xCache )
+{
+    if ( m_xListener.is() )
+        throw css::ucb::ListenerAlreadySetException();
+
+    if ( m_bStatic )
+        throw css::ucb::ListenerAlreadySetException();
+
+    uno::Reference< css::ucb::XSourceInitialization > xTarget( xCache, uno::UNO_QUERY );
+    if ( xTarget.is() )
+    {
+        uno::Reference< css::ucb::XCachedDynamicResultSetStubFactory >  xStubFactory;
+        try
+        {
+            xStubFactory
+                = css::ucb::CachedDynamicResultSetStubFactory::create(
+                      m_xContext );
+        }
+        catch ( uno::Exception const & )
+        {
+        }
+
+        if ( xStubFactory.is() )
+        {
+            xStubFactory->connectToCache(
+                                  this, xCache, m_aCommand.SortingInfo, nullptr );
+            return;
+        }
+    }
+    throw css::ucb::ServiceNotFoundException();
+}
+
+
+// Non-interface methods.
+
+
+void ResultSetImplHelper::init( bool bStatic )
+{
+    if ( m_bInitDone )
+        return;
+
+    if ( bStatic )
+    {
+        // virtual... derived class fills m_xResultSet1
+        initStatic();
+
+        OSL_ENSURE( m_xResultSet1.is(),
+                    "ResultSetImplHelper::init - No 1st result set!" );
+        m_bStatic = true;
+    }
+    else
+    {
+        // virtual... derived class fills m_xResultSet1 and m_xResultSet2
+        initDynamic();
+
+        OSL_ENSURE( m_xResultSet1.is(),
+                    "ResultSetImplHelper::init - No 1st result set!" );
+        OSL_ENSURE( m_xResultSet2.is(),
+                    "ResultSetImplHelper::init - No 2nd result set!" );
+        m_bStatic = false;
+    }
+    m_bInitDone = true;
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/resultsetmetadata.cxx b/ucbhelper/source/provider/resultsetmetadata.cxx
new file mode 100644
index 000000000..40f69053f
--- /dev/null
+++ b/ucbhelper/source/provider/resultsetmetadata.cxx
@@ -0,0 +1,404 @@
+/* -*- 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 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+
+#include <osl/diagnose.h>
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/sdbc/ColumnValue.hpp>
+#include <com/sun/star/sdbc/DataType.hpp>
+#include <com/sun/star/sdbc/XArray.hpp>
+#include <com/sun/star/sdbc/XBlob.hpp>
+#include <com/sun/star/sdbc/XClob.hpp>
+#include <com/sun/star/sdbc/XRef.hpp>
+#include <com/sun/star/util/Date.hpp>
+#include <com/sun/star/util/Time.hpp>
+#include <com/sun/star/util/DateTime.hpp>
+#include <com/sun/star/ucb/PropertiesManager.hpp>
+#include <ucbhelper/resultsetmetadata.hxx>
+#include <mutex>
+
+using namespace com::sun::star::beans;
+using namespace com::sun::star::io;
+using namespace com::sun::star::lang;
+using namespace com::sun::star::sdbc;
+using namespace com::sun::star::ucb;
+using namespace com::sun::star::uno;
+using namespace com::sun::star::util;
+
+
+namespace ucbhelper_impl {
+
+struct ResultSetMetaData_Impl
+{
+    std::mutex                                  m_aMutex;
+    std::vector< ::ucbhelper::ResultSetColumnData > m_aColumnData;
+    bool                                        m_bObtainedTypes;
+
+    explicit ResultSetMetaData_Impl( sal_Int32 nSize )
+    : m_aColumnData( nSize ), m_bObtainedTypes( false ) {}
+
+    explicit ResultSetMetaData_Impl(
+        std::vector< ::ucbhelper::ResultSetColumnData >&& rColumnData )
+    : m_aColumnData( std::move(rColumnData) ), m_bObtainedTypes( false ) {}
+};
+
+}
+
+using namespace ucbhelper_impl;
+
+namespace ucbhelper {
+
+
+// ResultSetMetaData Implementation.
+
+
+ResultSetMetaData::ResultSetMetaData(
+                        const Reference< XComponentContext >& rxContext,
+                        const Sequence< Property >& rProps )
+: m_pImpl( new ResultSetMetaData_Impl( rProps.getLength() ) ),
+  m_xContext( rxContext ),
+  m_aProps( rProps )
+{
+}
+
+
+ResultSetMetaData::ResultSetMetaData(
+                        const Reference< XComponentContext >& rxContext,
+                        const Sequence< Property >& rProps,
+                        std::vector< ResultSetColumnData >&& rColumnData )
+: m_pImpl( new ResultSetMetaData_Impl( std::move(rColumnData) ) ),
+  m_xContext( rxContext ),
+  m_aProps( rProps )
+{
+    OSL_ENSURE( m_pImpl->m_aColumnData.size() == sal_uInt32( rProps.getLength() ),
+                "ResultSetMetaData ctor - different array sizes!" );
+}
+
+
+// virtual
+ResultSetMetaData::~ResultSetMetaData()
+{
+}
+
+
+// XResultSetMetaData methods.
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSetMetaData::getColumnCount()
+{
+    return m_aProps.getLength();
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isAutoIncrement( sal_Int32 /*column*/ )
+{
+    /*
+        Checks whether column is automatically numbered, which makes it
+        read-only.
+     */
+    return false;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isCaseSensitive( sal_Int32 column )
+{
+    if ( ( column < 1 ) || ( column > m_aProps.getLength() ) )
+        return false;
+
+    return m_pImpl->m_aColumnData[ column - 1 ].isCaseSensitive;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isSearchable( sal_Int32 /*column*/ )
+{
+    return false;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isCurrency( sal_Int32 /*column*/ )
+{
+    return false;
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSetMetaData::isNullable( sal_Int32 /*column*/ )
+{
+    return ColumnValue::NULLABLE;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isSigned( sal_Int32 /*column*/ )
+{
+    return false;
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSetMetaData::getColumnDisplaySize( sal_Int32 /*column*/ )
+{
+    /*
+        Gets the normal maximum width in characters for column.
+     */
+    return 16;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getColumnLabel( sal_Int32 column )
+{
+    /*
+        Gets the suggested column title for column, to be used in print-
+        outs and displays.
+     */
+
+    if ( ( column < 1 ) || ( column > m_aProps.getLength() ) )
+        return OUString();
+
+    return m_aProps.getConstArray()[ column - 1 ].Name;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getColumnName( sal_Int32 column )
+{
+    /*
+        Gets the name of column.
+     */
+
+    if ( ( column < 1 ) || ( column > m_aProps.getLength() ) )
+        return OUString();
+
+    return m_aProps.getConstArray()[ column - 1 ].Name;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getSchemaName( sal_Int32 /*column*/ )
+{
+    /*
+        Gets the schema name for the table from which column of this
+        result set was derived.
+        Because this feature is not widely supported, the return value
+        for many DBMSs will be an empty string.
+     */
+    return OUString();
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSetMetaData::getPrecision( sal_Int32 /*column*/ )
+{
+    return -1;
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSetMetaData::getScale( sal_Int32 /*column*/ )
+{
+    return 0;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getTableName( sal_Int32 /*column*/ )
+{
+    /*
+        Gets the name of the table from which column of this result set
+        was derived or "" if there is none (for example, for a join).
+        Because this feature is not widely supported, the return value
+        for many DBMSs will be an empty string.
+     */
+    return OUString();
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getCatalogName( sal_Int32 /*column*/ )
+{
+    /*
+        Gets the catalog name for the table from which column of this
+        result set was derived.
+        Because this feature is not widely supported, the return value
+        for many DBMSs will be an empty string.
+     */
+    return OUString();
+}
+
+
+// virtual
+sal_Int32 SAL_CALL ResultSetMetaData::getColumnType( sal_Int32 column )
+{
+    /*
+        Gets the JDBC type for the value stored in column. ... The STRUCT
+        and DISTINCT type codes are always returned for structured and
+        distinct types, regardless of whether the value will be mapped
+        according to the standard mapping or be a custom mapping.
+     */
+
+    if ( ( column < 1 ) || ( column > m_aProps.getLength() ) )
+        return DataType::SQLNULL;
+
+    if ( m_aProps.getConstArray()[ column - 1 ].Type
+            == cppu::UnoType<void>::get() )
+    {
+        // No type given. Try UCB's Properties Manager...
+
+        std::unique_lock aGuard( m_pImpl->m_aMutex );
+
+        if ( !m_pImpl->m_bObtainedTypes )
+        {
+            try
+            {
+                Reference< XPropertySetInfo > xInfo = PropertiesManager::create( m_xContext );
+    // Less (remote) calls...
+
+                const Sequence< Property > aProps = xInfo->getProperties();
+
+                for ( Property& rProp : asNonConstRange(m_aProps) )
+                {
+                    auto pProp = std::find_if(aProps.begin(), aProps.end(),
+                        [&rProp](const Property& rProp1) { return rProp.Name == rProp1.Name; });
+                    if (pProp != aProps.end())
+                    {
+                        // Found...
+                        rProp.Type = pProp->Type;
+                    }
+                }
+            }
+            catch ( RuntimeException& )
+            {
+                throw;
+            }
+            catch ( Exception& )
+            {
+                // createInstance
+            }
+
+            m_pImpl->m_bObtainedTypes = true;
+        }
+    }
+
+    const Type& rType = m_aProps.getConstArray()[ column - 1 ].Type;
+    sal_Int32 nType = DataType::OTHER;
+
+    if ( rType == cppu::UnoType<OUString>::get() )
+        nType = DataType::VARCHAR;  // XRow::getString
+    else if ( rType == cppu::UnoType<bool>::get() )
+        nType = DataType::BIT;      // XRow::getBoolean
+    else if ( rType == cppu::UnoType<sal_Int32>::get() )
+        nType = DataType::INTEGER;  // XRow::getInt
+    else if ( rType == cppu::UnoType<sal_Int64>::get() )
+        nType = DataType::BIGINT;   // XRow::getLong
+    else if ( rType == cppu::UnoType<sal_Int16>::get() )
+        nType = DataType::SMALLINT; // XRow::getShort
+    else if ( rType == cppu::UnoType<sal_Int8>::get() )
+        nType = DataType::TINYINT;  // XRow::getByte
+    else if ( rType == cppu::UnoType<float>::get() )
+        nType = DataType::REAL;     // XRow::getFloat
+    else if ( rType == cppu::UnoType<double>::get() )
+        nType = DataType::DOUBLE;   // XRow::getDouble
+    else if ( rType == cppu::UnoType<Sequence<sal_Int8>>::get() )
+        nType = DataType::VARBINARY;// XRow::getBytes
+    else if ( rType == cppu::UnoType<Date>::get() )
+        nType = DataType::DATE;     // XRow::getDate
+    else if ( rType == cppu::UnoType<Time>::get() )
+        nType = DataType::TIME;     // XRow::getTime
+    else if ( rType == cppu::UnoType<DateTime>::get() )
+        nType = DataType::TIMESTAMP;// XRow::getTimestamp
+    else if ( rType == cppu::UnoType<XInputStream>::get() )
+        nType = DataType::LONGVARBINARY;    // XRow::getBinaryStream
+//      nType = DataType::LONGVARCHAR;      // XRow::getCharacterStream
+    else if ( rType == cppu::UnoType<XClob>::get() )
+        nType = DataType::CLOB; // XRow::getClob
+    else if ( rType == cppu::UnoType<XBlob>::get() )
+        nType = DataType::BLOB; // XRow::getBlob
+    else if ( rType == cppu::UnoType<XArray>::get() )
+        nType = DataType::ARRAY;// XRow::getArray
+    else if ( rType == cppu::UnoType<XRef>::get() )
+        nType = DataType::REF;// XRow::getRef
+    else
+        nType = DataType::OBJECT;// XRow::getObject
+
+    return nType;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getColumnTypeName( sal_Int32 /*column*/ )
+{
+    /*
+        Gets the type name used by this particular data source for the
+        values stored in column. If the type code for the type of value
+        stored in column is STRUCT, DISTINCT or JAVA_OBJECT, this method
+        returns a fully-qualified SQL type name.
+     */
+    return OUString();
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isReadOnly( sal_Int32 /*column*/ )
+{
+    return true;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isWritable( sal_Int32 /*column*/ )
+{
+    return false;
+}
+
+
+// virtual
+sal_Bool SAL_CALL ResultSetMetaData::isDefinitelyWritable( sal_Int32 /*column*/ )
+{
+    return false;
+}
+
+
+// virtual
+OUString SAL_CALL ResultSetMetaData::getColumnServiceName( sal_Int32 /*column*/ )
+{
+    /*
+          Returns the fully-qualified name of the service whose instances
+         are manufactured if XResultSet::getObject is called to retrieve
+        a value from the column.
+     */
+    return OUString();
+}
+
+} // namespace ucbhelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/simpleauthenticationrequest.cxx b/ucbhelper/source/provider/simpleauthenticationrequest.cxx
new file mode 100644
index 000000000..972864d9a
--- /dev/null
+++ b/ucbhelper/source/provider/simpleauthenticationrequest.cxx
@@ -0,0 +1,147 @@
+/* -*- 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 <com/sun/star/ucb/URLAuthenticationRequest.hpp>
+#include <ucbhelper/simpleauthenticationrequest.hxx>
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+
+SimpleAuthenticationRequest::SimpleAuthenticationRequest(
+                                      const OUString & rURL,
+                                      const OUString & rServerName,
+                                      const OUString & rRealm,
+                                      const OUString & rUserName,
+                                      const OUString & rPassword,
+                                      bool bAllowUseSystemCredentials,
+                                      bool bAllowSessionStoring )
+{
+
+    // Fill request...
+    ucb::URLAuthenticationRequest aRequest;
+//    aRequest.Message        = // OUString
+//    aRequest.Context        = // XInterface
+    aRequest.Classification = task::InteractionClassification_ERROR;
+    aRequest.ServerName     = rServerName;
+//    aRequest.Diagnostic     = // OUString
+    aRequest.HasRealm       = !rRealm.isEmpty();
+    if ( aRequest.HasRealm )
+        aRequest.Realm = rRealm;
+    aRequest.HasUserName    = true;
+    aRequest.UserName       = rUserName;
+    aRequest.HasPassword    = true;
+    aRequest.Password       = rPassword;
+    aRequest.HasAccount     = false;
+    aRequest.URL = rURL;
+
+    initialize(aRequest,
+       false,
+       true,
+       true,
+       aRequest.HasAccount,
+       bAllowUseSystemCredentials,
+       bAllowSessionStoring );
+}
+
+
+SimpleAuthenticationRequest::SimpleAuthenticationRequest(
+                                      const OUString & rURL,
+                                      const OUString & rServerName,
+                                      EntityType eRealmType,
+                                      const OUString & rRealm,
+                                      EntityType eUserNameType,
+                                      const OUString & rUserName,
+                                      EntityType ePasswordType,
+                                      const OUString & rPassword)
+{
+    // Fill request...
+    ucb::URLAuthenticationRequest aRequest;
+//    aRequest.Message        = // OUString
+//    aRequest.Context        = // XInterface
+    aRequest.Classification = task::InteractionClassification_ERROR;
+    aRequest.ServerName     = rServerName;
+//    aRequest.Diagnostic     = // OUString
+    aRequest.HasRealm       = eRealmType != ENTITY_NA;
+    if ( aRequest.HasRealm )
+        aRequest.Realm = rRealm;
+    aRequest.HasUserName    = eUserNameType != ENTITY_NA;
+    if ( aRequest.HasUserName )
+        aRequest.UserName = rUserName;
+    aRequest.HasPassword    = ePasswordType != ENTITY_NA;
+    if ( aRequest.HasPassword )
+        aRequest.Password = rPassword;
+    aRequest.HasAccount     = false;
+    aRequest.URL = rURL;
+
+    initialize(aRequest,
+       eRealmType == ENTITY_MODIFY,
+       eUserNameType == ENTITY_MODIFY,
+       ePasswordType == ENTITY_MODIFY,
+       false,
+       false,
+       true );
+}
+
+
+void SimpleAuthenticationRequest::initialize(
+      const ucb::URLAuthenticationRequest & rRequest,
+      bool bCanSetRealm,
+      bool bCanSetUserName,
+      bool bCanSetPassword,
+      bool bCanSetAccount,
+      bool bAllowUseSystemCredentials,
+      bool bAllowSessionStoring )
+{
+    setRequest( uno::Any( rRequest ) );
+
+    // Fill continuations...
+    unsigned int nSize = 2;
+
+    if( bAllowSessionStoring )
+        nSize++;
+
+    uno::Sequence< ucb::RememberAuthentication > aRememberModes( nSize );
+    auto it = aRememberModes.getArray();
+    *it++ = ucb::RememberAuthentication_NO;
+
+    if( bAllowSessionStoring )
+        *it++ = ucb::RememberAuthentication_SESSION;
+
+    *it = ucb::RememberAuthentication_PERSISTENT;
+
+    m_xAuthSupplier
+        = new InteractionSupplyAuthentication(
+                this,
+                bCanSetRealm,
+                bCanSetUserName,
+                bCanSetPassword,
+                bCanSetAccount,
+                aRememberModes, // rRememberPasswordModes
+                ucb::RememberAuthentication_SESSION, // eDefaultRememberPasswordMode
+                aRememberModes, // rRememberAccountModes
+                ucb::RememberAuthentication_SESSION, // eDefaultRememberAccountMode
+                bAllowUseSystemCredentials // bCanUseSystemCredentials,
+            );
+
+    setContinuations(
+        { new InteractionAbort(this), new InteractionRetry(this), m_xAuthSupplier });
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/simplecertificatevalidationrequest.cxx b/ucbhelper/source/provider/simplecertificatevalidationrequest.cxx
new file mode 100644
index 000000000..e1dba7a35
--- /dev/null
+++ b/ucbhelper/source/provider/simplecertificatevalidationrequest.cxx
@@ -0,0 +1,42 @@
+/* -*- 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 <com/sun/star/ucb/CertificateValidationRequest.hpp>
+#include <ucbhelper/simplecertificatevalidationrequest.hxx>
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+
+SimpleCertificateValidationRequest::SimpleCertificateValidationRequest( sal_Int32 lCertificateValidity,
+                                                                        const css::uno::Reference<css::security::XCertificate>& certificate,
+                                                                        const OUString & hostname)
+{
+    // Fill request...
+    ucb::CertificateValidationRequest aRequest;
+    aRequest.CertificateValidity = lCertificateValidity;
+    aRequest.Certificate = certificate;
+    aRequest.HostName = hostname;
+
+    setRequest( uno::Any( aRequest ) );
+
+    setContinuations({ new InteractionAbort(this), new InteractionApprove(this) });
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/simpleinteractionrequest.cxx b/ucbhelper/source/provider/simpleinteractionrequest.cxx
new file mode 100644
index 000000000..d846be5d3
--- /dev/null
+++ b/ucbhelper/source/provider/simpleinteractionrequest.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 <ucbhelper/simpleinteractionrequest.hxx>
+#include <comphelper/sequence.hxx>
+
+#include <osl/diagnose.h>
+#include <rtl/ref.hxx>
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+
+SimpleInteractionRequest::SimpleInteractionRequest(
+                                    const uno::Any & rRequest,
+                                    const ContinuationFlags nContinuations )
+: InteractionRequest( rRequest )
+{
+    // Set continuations.
+    OSL_ENSURE( nContinuations != ContinuationFlags::NONE,
+                "SimpleInteractionRequest - No continuation!" );
+
+    std::vector< uno::Reference< task::XInteractionContinuation > > aContinuations;
+    if ( nContinuations & ContinuationFlags::Abort )
+    {
+        aContinuations.push_back( new InteractionAbort( this ) );
+    }
+    if ( nContinuations & ContinuationFlags::Retry )
+    {
+        aContinuations.push_back( new InteractionRetry( this ) );
+    }
+    if ( nContinuations & ContinuationFlags::Approve )
+    {
+        aContinuations.push_back( new InteractionApprove( this ) );
+    }
+    if (  nContinuations & ContinuationFlags::Disapprove )
+    {
+        aContinuations.push_back( new InteractionDisapprove( this ) );
+    }
+    setContinuations( comphelper::containerToSequence(aContinuations) );
+}
+
+
+ContinuationFlags SimpleInteractionRequest::getResponse() const
+{
+    rtl::Reference< InteractionContinuation > xSelection = getSelection();
+    if ( xSelection.is() )
+    {
+        InteractionContinuation * pSelection = xSelection.get();
+
+        uno::Reference< task::XInteractionAbort > xAbort(
+                                        pSelection, uno::UNO_QUERY );
+        if ( xAbort.is() )
+            return ContinuationFlags::Abort;
+
+        uno::Reference< task::XInteractionRetry > xRetry(
+                                        pSelection, uno::UNO_QUERY );
+        if ( xRetry.is() )
+            return ContinuationFlags::Retry;
+
+        uno::Reference< task::XInteractionApprove > xApprove(
+                                        pSelection, uno::UNO_QUERY );
+        if ( xApprove.is() )
+            return ContinuationFlags::Approve;
+
+        uno::Reference< task::XInteractionDisapprove > xDisapprove(
+                                        pSelection, uno::UNO_QUERY );
+        if ( xDisapprove.is() )
+            return ContinuationFlags::Disapprove;
+
+        OSL_FAIL( "SimpleInteractionRequest::getResponse - Unknown continuation!" );
+    }
+    return ContinuationFlags::NONE;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/simpleioerrorrequest.cxx b/ucbhelper/source/provider/simpleioerrorrequest.cxx
new file mode 100644
index 000000000..df28f6352
--- /dev/null
+++ b/ucbhelper/source/provider/simpleioerrorrequest.cxx
@@ -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 .
+ */
+
+#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
+#include <com/sun/star/ucb/XCommandProcessor.hpp>
+#include "simpleioerrorrequest.hxx"
+
+using namespace com::sun::star;
+using namespace ucbhelper;
+
+
+SimpleIOErrorRequest::SimpleIOErrorRequest(
+                const ucb::IOErrorCode eError,
+                const uno::Sequence< uno::Any > & rArgs,
+                const OUString & rMessage,
+                const uno::Reference< ucb::XCommandProcessor > & xContext )
+{
+    // Fill request...
+    ucb::InteractiveAugmentedIOException aRequest;
+    aRequest.Message         = rMessage;
+    aRequest.Context         = xContext;
+    aRequest.Classification  = task::InteractionClassification_ERROR;
+    aRequest.Code            = eError;
+    aRequest.Arguments       = rArgs;
+
+    setRequest( uno::Any( aRequest ) );
+
+    // Fill continuations...
+    setContinuations({ new InteractionAbort(this) });
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/simpleioerrorrequest.hxx b/ucbhelper/source/provider/simpleioerrorrequest.hxx
new file mode 100644
index 000000000..134f10a9a
--- /dev/null
+++ b/ucbhelper/source/provider/simpleioerrorrequest.hxx
@@ -0,0 +1,65 @@
+/* -*- 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 .
+ */
+
+#ifndef UCBHELPER_SOURCE_PROVIDER_SIMPLEIOERRORREQUEST_HXX
+#define UCBHELPER_SOURCE_PROVIDER_SIMPLEIOERRORREQUEST_HXX
+
+#include <com/sun/star/ucb/IOErrorCode.hpp>
+#include <ucbhelper/interactionrequest.hxx>
+
+namespace com::sun::star::ucb { class XCommandProcessor; }
+
+namespace ucbhelper {
+
+/**
+  * This class implements a simple IO error interaction request. Instances
+  * can be passed directly to XInteractionHandler::handle(...). Each
+  * instance contains an InteractiveIOException and one interaction
+  * continuation: "Abort".
+  *
+  * @see css::ucb::InteractiveIOException
+  * @see InteractionAbort
+  */
+class SimpleIOErrorRequest final : public ucbhelper::InteractionRequest
+{
+public:
+    /**
+      * Constructor.
+      *
+      * @param xContext contains the command processor that executes the
+      *        command related to the request.
+      *
+      * @param eError is the error code to pass along with the request.
+      *
+      * qparam rArgs are additional parameters according to the specification
+      *        of the error code. Refer to com/sun/star/ucb/IOErrorCode.idl
+      *        for details.
+      */
+    SimpleIOErrorRequest( const css::ucb::IOErrorCode eError,
+                          const css::uno::Sequence< css::uno::Any > & rArgs,
+                          const OUString & rMessage,
+                          const css::uno::Reference< css::ucb::XCommandProcessor > & xContext
+                         );
+};
+
+} // namespace ucbhelper
+
+#endif /* ! UCBHELPER_SOURCE_PROVIDER_SIMPLEIOERRORREQUEST_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucbhelper/source/provider/simplenameclashresolverequest.cxx b/ucbhelper/source/provider/simplenameclashresolverequest.cxx
new file mode 100644
index 000000000..652bdcdbb
--- /dev/null
+++ b/ucbhelper/source/provider/simplenameclashresolverequest.cxx
@@ -0,0 +1,157 @@
+/* -*- 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 <com/sun/star/ucb/NameClashResolveRequest.hpp>
+#include <com/sun/star/ucb/XInteractionSupplyName.hpp>
+#include <cppuhelper/typeprovider.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <ucbhelper/simplenameclashresolverequest.hxx>
+
+using namespace com::sun::star;
+
+namespace ucbhelper {
+
+/**
+  * This class implements a standard interaction continuation, namely the
+  * interface XInteractionSupplyName. Instances of this class can be passed
+  * along with an interaction request to indicate the possibility to
+  * supply a new name.
+  */
+class InteractionSupplyName : public InteractionContinuation,
+                              public css::lang::XTypeProvider,
+                              public css::ucb::XInteractionSupplyName
+{
+    OUString m_aName;
+
+public:
+    explicit InteractionSupplyName( InteractionRequest * pRequest )
+    : InteractionContinuation( pRequest ) {}
+
+    // XInterface
+    virtual css::uno::Any SAL_CALL
+    queryInterface( const css::uno::Type & rType ) override;
+    virtual void SAL_CALL acquire()
+        noexcept override;
+    virtual void SAL_CALL release()
+        noexcept override;
+
+    // XTypeProvider
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL
+    getTypes() override;
+    virtual css::uno::Sequence< sal_Int8 > SAL_CALL
+    getImplementationId() override;
+
+    // XInteractionContinuation
+    virtual void SAL_CALL select() override;
+
+    // XInteractionSupplyName
+    virtual void SAL_CALL setName( const OUString& Name ) override;
+
+    // Non-interface methods.
+
+    /**
+      * This method returns the name that was supplied by the interaction
+      * handler.
+      *
+      * @return the name.
+      */
+    const OUString & getName() const { return m_aName; }
+};
+
+void SAL_CALL InteractionSupplyName::acquire()
+    noexcept
+{
+    OWeakObject::acquire();
+}
+
+void SAL_CALL InteractionSupplyName::release()
+    noexcept
+{
+    OWeakObject::release();
+}
+
+uno::Any SAL_CALL
+InteractionSupplyName::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = cppu::queryInterface( rType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< task::XInteractionContinuation * >( this ),
+                static_cast< ucb::XInteractionSupplyName * >( this ) );
+
+    return aRet.hasValue()
+            ? aRet : InteractionContinuation::queryInterface( rType );
+}
+
+uno::Sequence< sal_Int8 > SAL_CALL InteractionSupplyName::getImplementationId()
+{
+    return css::uno::Sequence<sal_Int8>();
+}
+
+uno::Sequence< uno::Type > SAL_CALL InteractionSupplyName::getTypes()
+{
+    static cppu::OTypeCollection s_aCollection(
+                cppu::UnoType<lang::XTypeProvider>::get(),
+                cppu::UnoType<ucb::XInteractionSupplyName>::get() );
+
+    return s_aCollection.getTypes();
+}
+
+void SAL_CALL InteractionSupplyName::select()
+{
+    recordSelection();
+}
+
+void SAL_CALL
+InteractionSupplyName::setName( const OUString& Name )
+{
+    m_aName = Name;
+}
+
+SimpleNameClashResolveRequest::~SimpleNameClashResolveRequest() {}
+
+SimpleNameClashResolveRequest::SimpleNameClashResolveRequest(
+                                    const OUString & rTargetFolderURL,
+                                    const OUString & rClashingName )
+{
+    // Fill request...
+    ucb::NameClashResolveRequest aRequest;
+//    aRequest.Message        = // OUString
+//    aRequest.Context        = // XInterface
+    aRequest.Classification  = task::InteractionClassification_QUERY;
+    aRequest.TargetFolderURL = rTargetFolderURL;
+    aRequest.ClashingName    = rClashingName;
+    aRequest.ProposedNewName = OUString();
+
+    setRequest( uno::Any( aRequest ) );
+
+    // Fill continuations...
+    m_xNameSupplier = new InteractionSupplyName( this );
+
+    setContinuations({ new InteractionAbort(this), m_xNameSupplier,
+                       new InteractionReplaceExistingData(this) });
+}
+
+OUString const & SimpleNameClashResolveRequest::getNewName() const
+{
+    return m_xNameSupplier->getName();
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */