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

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

16 files changed, 6141 insertions, 0 deletions

diff --git a/ucb/source/ucp/hierarchy/dynamicresultset.cxx b/ucb/source/ucp/hierarchy/dynamicresultset.cxx
new file mode 100644
index 000000000..e5d863bee
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/dynamicresultset.cxx
@@ -0,0 +1,76 @@
+/* -*- 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 not a dynamic result set!!! It only implements
+   the necessary interfaces, but never recognizes/notifies changes!!!
+
+ *************************************************************************/
+#include "hierarchydatasupplier.hxx"
+#include "dynamicresultset.hxx"
+
+using namespace com::sun::star;
+using namespace hierarchy_ucp;
+
+
+// DynamicResultSet Implementation.
+
+
+DynamicResultSet::DynamicResultSet(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            const rtl::Reference< HierarchyContent >& rxContent,
+            const ucb::OpenCommandArgument2& rCommand )
+: ResultSetImplHelper( rxContext, rCommand ),
+  m_xContent( rxContent )
+{
+}
+
+
+// Non-interface methods.
+
+
+void DynamicResultSet::initStatic()
+{
+    m_xResultSet1
+        = new ::ucbhelper::ResultSet(
+            m_xContext,
+            m_aCommand.Properties,
+            new  HierarchyResultSetDataSupplier( m_xContext,
+                                                 m_xContent,
+                                                 m_aCommand.Mode ) );
+}
+
+
+void DynamicResultSet::initDynamic()
+{
+    m_xResultSet1
+        = new ::ucbhelper::ResultSet(
+            m_xContext,
+            m_aCommand.Properties,
+            new  HierarchyResultSetDataSupplier( m_xContext,
+                                                 m_xContent,
+                                                 m_aCommand.Mode ) );
+    m_xResultSet2 = m_xResultSet1;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/dynamicresultset.hxx b/ucb/source/ucp/hierarchy/dynamicresultset.hxx
new file mode 100644
index 000000000..6452c26ea
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/dynamicresultset.hxx
@@ -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 .
+ */
+
+#pragma once
+
+#include <rtl/ref.hxx>
+#include <ucbhelper/resultsethelper.hxx>
+#include "hierarchycontent.hxx"
+
+namespace hierarchy_ucp {
+
+class DynamicResultSet : public ::ucbhelper::ResultSetImplHelper
+{
+    rtl::Reference< HierarchyContent > m_xContent;
+
+private:
+    virtual void initStatic() override;
+    virtual void initDynamic() override;
+
+public:
+    DynamicResultSet(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            const rtl::Reference< HierarchyContent >& rxContent,
+            const css::ucb::OpenCommandArgument2& rCommand );
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchycontent.cxx b/ucb/source/ucp/hierarchy/hierarchycontent.cxx
new file mode 100644
index 000000000..1a773cd24
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchycontent.cxx
@@ -0,0 +1,1776 @@
+/* -*- 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
+ **************************************************************************
+
+ - optimize transfer command. "Move" should be implementable much more
+   efficient!
+
+ **************************************************************************
+
+ - Root Folder vs. 'normal' Folder
+    - root doesn't support command 'delete'
+    - root doesn't support command 'insert'
+    - root needs not created via XContentCreator - queryContent with root
+      folder id ( HIERARCHY_ROOT_FOLDER_URL ) always returns a value != 0
+    - root has no parent.
+
+ *************************************************************************/
+#include <osl/diagnose.h>
+
+#include <rtl/ustring.hxx>
+#include <com/sun/star/beans/IllegalTypeException.hpp>
+#include <com/sun/star/beans/PropertyAttribute.hpp>
+#include <com/sun/star/beans/PropertyExistException.hpp>
+#include <com/sun/star/beans/PropertyState.hpp>
+#include <com/sun/star/lang/IllegalAccessException.hpp>
+#include <com/sun/star/ucb/ContentInfoAttribute.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/ucb/InsertCommandArgument.hpp>
+#include <com/sun/star/ucb/InteractiveBadTransferURLException.hpp>
+#include <com/sun/star/ucb/MissingPropertiesException.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/ucb/NameClashException.hpp>
+#include <com/sun/star/ucb/OpenCommandArgument2.hpp>
+#include <com/sun/star/ucb/TransferInfo.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <com/sun/star/ucb/UnsupportedNameClashException.hpp>
+#include <com/sun/star/ucb/XCommandInfo.hpp>
+#include <com/sun/star/ucb/XPersistentPropertySet.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <comphelper/propertysequence.hxx>
+#include <comphelper/sequence.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <ucbhelper/contentidentifier.hxx>
+#include <ucbhelper/propertyvalueset.hxx>
+#include <ucbhelper/cancelcommandexecution.hxx>
+#include <ucbhelper/macros.hxx>
+#include "hierarchycontent.hxx"
+#include "hierarchyprovider.hxx"
+#include "dynamicresultset.hxx"
+#include "hierarchyuri.hxx"
+
+#include "../inc/urihelper.hxx"
+
+using namespace com::sun::star;
+using namespace hierarchy_ucp;
+
+
+// HierarchyContent Implementation.
+
+
+// static ( "virtual" ctor )
+rtl::Reference<HierarchyContent> HierarchyContent::create(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier )
+{
+    // Fail, if content does not exist.
+    HierarchyContentProperties aProps;
+    if ( !loadData( rxContext, pProvider, Identifier, aProps ) )
+        return nullptr;
+
+    return new HierarchyContent( rxContext, pProvider, Identifier, aProps );
+}
+
+
+// static ( "virtual" ctor )
+rtl::Reference<HierarchyContent> HierarchyContent::create(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier,
+            const ucb::ContentInfo& Info )
+{
+    if ( Info.Type.isEmpty() )
+        return nullptr;
+
+    if ( Info.Type != HIERARCHY_FOLDER_CONTENT_TYPE && Info.Type != HIERARCHY_LINK_CONTENT_TYPE )
+        return nullptr;
+
+    return new HierarchyContent( rxContext, pProvider, Identifier, Info );
+}
+
+
+HierarchyContent::HierarchyContent(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier,
+            const HierarchyContentProperties& rProps )
+: ContentImplHelper( rxContext, pProvider, Identifier ),
+  m_aProps( rProps ),
+  m_eState( PERSISTENT ),
+  m_pProvider( pProvider ),
+  m_bCheckedReadOnly( false ),
+  m_bIsReadOnly( true )
+{
+    setKind( Identifier );
+}
+
+
+HierarchyContent::HierarchyContent(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier,
+            const ucb::ContentInfo& Info )
+  : ContentImplHelper( rxContext, pProvider, Identifier ),
+  m_aProps( Info.Type == HIERARCHY_FOLDER_CONTENT_TYPE ? HierarchyEntryData::FOLDER : HierarchyEntryData::LINK ),
+  m_eState( TRANSIENT ),
+  m_pProvider( pProvider ),
+  m_bCheckedReadOnly( false ),
+  m_bIsReadOnly( true )
+{
+    setKind( Identifier );
+}
+
+
+// virtual
+HierarchyContent::~HierarchyContent()
+{
+}
+
+
+// XInterface methods.
+
+
+// virtual
+void SAL_CALL HierarchyContent::acquire()
+    noexcept
+{
+    ContentImplHelper::acquire();
+}
+
+
+// virtual
+void SAL_CALL HierarchyContent::release()
+    noexcept
+{
+    ContentImplHelper::release();
+}
+
+
+// virtual
+uno::Any SAL_CALL HierarchyContent::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet = ContentImplHelper::queryInterface( rType );
+
+    if ( !aRet.hasValue() )
+    {
+        // Note: isReadOnly may be relative expensive. So avoid calling it
+        //       unless it is really necessary.
+        aRet = cppu::queryInterface(
+                rType, static_cast< ucb::XContentCreator * >( this ) );
+        if ( aRet.hasValue() )
+        {
+            if ( !isFolder() || isReadOnly() )
+                return uno::Any();
+        }
+    }
+
+    return aRet;
+}
+
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_COMMON_IMPL( HierarchyContent );
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL HierarchyContent::getTypes()
+{
+    if ( isFolder() && !isReadOnly() )
+    {
+        static cppu::OTypeCollection s_aFolderTypes(
+                    CPPU_TYPE_REF( lang::XTypeProvider ),
+                    CPPU_TYPE_REF( lang::XServiceInfo ),
+                    CPPU_TYPE_REF( lang::XComponent ),
+                    CPPU_TYPE_REF( ucb::XContent ),
+                    CPPU_TYPE_REF( ucb::XCommandProcessor ),
+                    CPPU_TYPE_REF( beans::XPropertiesChangeNotifier ),
+                    CPPU_TYPE_REF( ucb::XCommandInfoChangeNotifier ),
+                    CPPU_TYPE_REF( beans::XPropertyContainer ),
+                    CPPU_TYPE_REF( beans::XPropertySetInfoChangeNotifier ),
+                    CPPU_TYPE_REF( container::XChild ),
+                    CPPU_TYPE_REF( ucb::XContentCreator ) );
+
+
+        return s_aFolderTypes.getTypes();
+    }
+    else
+    {
+        static cppu::OTypeCollection s_aDocumentTypes(
+                    CPPU_TYPE_REF( lang::XTypeProvider ),
+                    CPPU_TYPE_REF( lang::XServiceInfo ),
+                    CPPU_TYPE_REF( lang::XComponent ),
+                    CPPU_TYPE_REF( ucb::XContent ),
+                    CPPU_TYPE_REF( ucb::XCommandProcessor ),
+                    CPPU_TYPE_REF( beans::XPropertiesChangeNotifier ),
+                    CPPU_TYPE_REF( ucb::XCommandInfoChangeNotifier ),
+                    CPPU_TYPE_REF( beans::XPropertyContainer ),
+                    CPPU_TYPE_REF( beans::XPropertySetInfoChangeNotifier ),
+                    CPPU_TYPE_REF( container::XChild ) );
+
+        return s_aDocumentTypes.getTypes();
+    }
+}
+
+
+// XServiceInfo methods.
+
+
+// virtual
+OUString SAL_CALL HierarchyContent::getImplementationName()
+{
+    return "com.sun.star.comp.ucb.HierarchyContent";
+}
+
+
+// virtual
+uno::Sequence< OUString > SAL_CALL
+HierarchyContent::getSupportedServiceNames()
+{
+    uno::Sequence< OUString > aSNS( 1 );
+
+    if ( m_eKind == LINK )
+        aSNS.getArray()[ 0 ] = "com.sun.star.ucb.HierarchyLinkContent";
+    else if ( m_eKind == FOLDER )
+        aSNS.getArray()[ 0 ] = "com.sun.star.ucb.HierarchyFolderContent";
+    else
+        aSNS.getArray()[ 0 ] = "com.sun.star.ucb.HierarchyRootFolderContent";
+
+    return aSNS;
+}
+
+
+// XContent methods.
+
+
+// virtual
+OUString SAL_CALL HierarchyContent::getContentType()
+{
+    return m_aProps.getContentType();
+}
+
+
+// virtual
+uno::Reference< ucb::XContentIdentifier > SAL_CALL
+HierarchyContent::getIdentifier()
+{
+    // Transient?
+    if ( m_eState == TRANSIENT )
+    {
+        // Transient contents have no identifier.
+        return uno::Reference< ucb::XContentIdentifier >();
+    }
+
+    return ContentImplHelper::getIdentifier();
+}
+
+
+// XCommandProcessor methods.
+
+
+// virtual
+uno::Any SAL_CALL HierarchyContent::execute(
+        const ucb::Command& aCommand,
+        sal_Int32 /*CommandId*/,
+        const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    uno::Any aRet;
+
+    if ( aCommand.Name == "getPropertyValues" )
+    {
+
+        // getPropertyValues
+
+
+        uno::Sequence< beans::Property > Properties;
+        if ( !( aCommand.Argument >>= Properties ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= getPropertyValues( Properties );
+    }
+    else if ( aCommand.Name == "setPropertyValues" )
+    {
+
+        // setPropertyValues
+
+
+        uno::Sequence< beans::PropertyValue > aProperties;
+        if ( !( aCommand.Argument >>= aProperties ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        if ( !aProperties.hasElements() )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "No properties!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= setPropertyValues( aProperties, Environment );
+    }
+    else if ( aCommand.Name == "getPropertySetInfo" )
+    {
+
+        // getPropertySetInfo
+
+
+        aRet <<= getPropertySetInfo( Environment );
+    }
+    else if ( aCommand.Name == "getCommandInfo" )
+    {
+
+        // getCommandInfo
+
+
+        aRet <<= getCommandInfo( Environment );
+    }
+    else if ( aCommand.Name == "open" && isFolder() )
+    {
+
+        // open command for a folder content
+
+
+        ucb::OpenCommandArgument2 aOpenCommand;
+        if ( !( aCommand.Argument >>= aOpenCommand ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        uno::Reference< ucb::XDynamicResultSet > xSet
+                = new DynamicResultSet( m_xContext, this, aOpenCommand );
+        aRet <<= xSet;
+    }
+    else if ( aCommand.Name == "insert" && ( m_eKind != ROOT ) && !isReadOnly() )
+    {
+
+        // insert
+        //  ( Not available at root folder )
+
+
+        ucb::InsertCommandArgument aArg;
+        if ( !( aCommand.Argument >>= aArg ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        sal_Int32 nNameClash = aArg.ReplaceExisting
+                             ? ucb::NameClash::OVERWRITE
+                             : ucb::NameClash::ERROR;
+        insert( nNameClash, Environment );
+    }
+    else if ( aCommand.Name == "delete" && ( m_eKind != ROOT ) && !isReadOnly() )
+    {
+
+        // delete
+        //  ( Not available at root folder )
+
+
+        bool bDeletePhysical = false;
+        aCommand.Argument >>= bDeletePhysical;
+        destroy( bDeletePhysical, Environment );
+
+        // Remove own and all children's persistent data.
+        if ( !removeData() )
+        {
+            uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+            {
+                {"Uri", uno::Any(m_xIdentifier->getContentIdentifier())}
+            }));
+            ucbhelper::cancelCommandExecution(
+                ucb::IOErrorCode_CANT_WRITE,
+                aArgs,
+                Environment,
+                "Cannot remove persistent data!",
+                this );
+            // Unreachable
+        }
+
+        // Remove own and all children's Additional Core Properties.
+        removeAdditionalPropertySet();
+    }
+    else if ( aCommand.Name == "transfer" && isFolder() && !isReadOnly() )
+    {
+
+        // transfer
+        //      ( Not available at link objects )
+
+
+        ucb::TransferInfo aInfo;
+        if ( !( aCommand.Argument >>= aInfo ) )
+        {
+            OSL_FAIL( "Wrong argument type!" );
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        transfer( aInfo, Environment );
+    }
+    else if ( aCommand.Name == "createNewContent" && isFolder() && !isReadOnly() )
+    {
+
+        // createNewContent
+        //      ( Not available at link objects )
+
+
+        ucb::ContentInfo aInfo;
+        if ( !( aCommand.Argument >>= aInfo ) )
+        {
+            OSL_FAIL( "Wrong argument type!" );
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= createNewContent( aInfo );
+    }
+    else
+    {
+
+        // Unsupported command
+
+
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::UnsupportedCommandException(
+                                OUString(),
+                                static_cast< cppu::OWeakObject * >( this ) ) ),
+            Environment );
+        // Unreachable
+    }
+
+    return aRet;
+}
+
+
+// virtual
+void SAL_CALL HierarchyContent::abort( sal_Int32 /*CommandId*/ )
+{
+    // @@@ Generally, no action takes much time...
+}
+
+
+// XContentCreator methods.
+
+
+// virtual
+uno::Sequence< ucb::ContentInfo > SAL_CALL
+HierarchyContent::queryCreatableContentsInfo()
+{
+    return m_aProps.getCreatableContentsInfo();
+}
+
+
+// virtual
+uno::Reference< ucb::XContent > SAL_CALL
+HierarchyContent::createNewContent( const ucb::ContentInfo& Info )
+{
+    if ( isFolder() )
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        if ( Info.Type.isEmpty() )
+            return uno::Reference< ucb::XContent >();
+
+        bool bCreateFolder = Info.Type == HIERARCHY_FOLDER_CONTENT_TYPE;
+
+        if ( !bCreateFolder && Info.Type != HIERARCHY_LINK_CONTENT_TYPE )
+            return uno::Reference< ucb::XContent >();
+
+        OUString aURL = m_xIdentifier->getContentIdentifier();
+
+        OSL_ENSURE( !aURL.isEmpty(),
+                    "HierarchyContent::createNewContent - empty identifier!" );
+
+        if ( ( aURL.lastIndexOf( '/' ) + 1 ) != aURL.getLength() )
+            aURL += "/";
+
+        if ( bCreateFolder )
+            aURL += "New_Folder";
+        else
+            aURL += "New_Link";
+
+        uno::Reference< ucb::XContentIdentifier > xId
+            = new ::ucbhelper::ContentIdentifier( aURL );
+
+        return create( m_xContext, m_pProvider, xId, Info );
+    }
+    else
+    {
+        OSL_FAIL( "createNewContent called on non-folder object!" );
+        return uno::Reference< ucb::XContent >();
+    }
+}
+
+
+// virtual
+OUString HierarchyContent::getParentURL()
+{
+    HierarchyUri aUri( m_xIdentifier->getContentIdentifier() );
+    return aUri.getParentUri();
+}
+
+
+//static
+bool HierarchyContent::hasData(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier )
+{
+    OUString aURL = Identifier->getContentIdentifier();
+
+    // Am I a root folder?
+    HierarchyUri aUri( aURL );
+    if ( aUri.isRootFolder() )
+    {
+        // hasData must always return 'true' for root folder
+        // even if no persistent data exist!!!
+        return true;
+    }
+
+    return HierarchyEntry( rxContext, pProvider, aURL ).hasData();
+}
+
+
+//static
+bool HierarchyContent::loadData(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier,
+            HierarchyContentProperties& rProps )
+{
+    OUString aURL = Identifier->getContentIdentifier();
+
+    // Am I a root folder?
+    HierarchyUri aUri( aURL );
+    if ( aUri.isRootFolder() )
+    {
+        rProps = HierarchyContentProperties( HierarchyEntryData::FOLDER );
+    }
+    else
+    {
+        HierarchyEntry aEntry( rxContext, pProvider, aURL );
+        HierarchyEntryData aData;
+        if ( !aEntry.getData( aData ) )
+            return false;
+
+        rProps = HierarchyContentProperties( aData );
+    }
+    return true;
+}
+
+
+bool HierarchyContent::storeData()
+{
+    HierarchyEntry aEntry(
+            m_xContext, m_pProvider, m_xIdentifier->getContentIdentifier() );
+    return aEntry.setData( m_aProps.getHierarchyEntryData() );
+}
+
+
+void HierarchyContent::renameData(
+            const uno::Reference< ucb::XContentIdentifier >& xOldId,
+            const uno::Reference< ucb::XContentIdentifier >& xNewId )
+{
+    HierarchyEntry aEntry(
+            m_xContext, m_pProvider, xOldId->getContentIdentifier() );
+    aEntry.move( xNewId->getContentIdentifier(),
+                        m_aProps.getHierarchyEntryData() );
+}
+
+
+bool HierarchyContent::removeData()
+{
+    HierarchyEntry aEntry(
+        m_xContext, m_pProvider, m_xIdentifier->getContentIdentifier() );
+    return aEntry.remove();
+}
+
+
+void HierarchyContent::setKind(
+            const uno::Reference< ucb::XContentIdentifier >& Identifier )
+{
+    if ( m_aProps.getIsFolder() )
+    {
+        // Am I a root folder?
+        HierarchyUri aUri( Identifier->getContentIdentifier() );
+        if ( aUri.isRootFolder() )
+            m_eKind = ROOT;
+        else
+            m_eKind = FOLDER;
+    }
+    else
+        m_eKind = LINK;
+}
+
+
+bool HierarchyContent::isReadOnly()
+{
+    if ( !m_bCheckedReadOnly )
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+        if ( !m_bCheckedReadOnly )
+        {
+            m_bCheckedReadOnly = true;
+            m_bIsReadOnly      = true;
+
+            HierarchyUri aUri( m_xIdentifier->getContentIdentifier() );
+            uno::Reference< lang::XMultiServiceFactory > xConfigProv
+                = m_pProvider->getConfigProvider( aUri.getService() );
+            if ( xConfigProv.is() )
+            {
+                uno::Sequence< OUString > aNames
+                    = xConfigProv->getAvailableServiceNames();
+                m_bIsReadOnly = comphelper::findValue(aNames, "com.sun.star.ucb.HierarchyDataReadWriteAccess") == -1;
+            }
+        }
+    }
+
+    return m_bIsReadOnly;
+}
+
+
+uno::Reference< ucb::XContentIdentifier >
+HierarchyContent::makeNewIdentifier( const OUString& rTitle )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    // Assemble new content identifier...
+    HierarchyUri aUri( m_xIdentifier->getContentIdentifier() );
+    OUString aNewURL = aUri.getParentUri() + "/";
+    aNewURL += ::ucb_impl::urihelper::encodeSegment( rTitle );
+
+    return uno::Reference< ucb::XContentIdentifier >(
+        new ::ucbhelper::ContentIdentifier( aNewURL ) );
+}
+
+
+void HierarchyContent::queryChildren( HierarchyContentRefVector& rChildren )
+{
+    if ( ( m_eKind != FOLDER ) && ( m_eKind != ROOT ) )
+        return;
+
+    // Obtain a list with a snapshot of all currently instantiated contents
+    // from provider and extract the contents which are direct children
+    // of this content.
+
+    ::ucbhelper::ContentRefList aAllContents;
+    m_xProvider->queryExistingContents( aAllContents );
+
+    OUString aURL = m_xIdentifier->getContentIdentifier();
+    sal_Int32 nURLPos = aURL.lastIndexOf( '/' );
+
+    if ( nURLPos != ( aURL.getLength() - 1 ) )
+    {
+        // No trailing slash found. Append.
+        aURL += "/";
+    }
+
+    sal_Int32 nLen = aURL.getLength();
+
+    for ( const auto& rContent : aAllContents )
+    {
+        ::ucbhelper::ContentImplHelperRef xChild = rContent;
+        OUString aChildURL
+            = xChild->getIdentifier()->getContentIdentifier();
+
+        // Is aURL a prefix of aChildURL?
+        if ( ( aChildURL.getLength() > nLen ) &&
+             ( aChildURL.startsWith( aURL ) ) )
+        {
+            sal_Int32 nPos = aChildURL.indexOf( '/', nLen );
+
+            if ( ( nPos == -1 ) ||
+                 ( nPos == ( aChildURL.getLength() - 1 ) ) )
+            {
+                // No further slashes/ only a final slash. It's a child!
+                rChildren.emplace_back(
+                        static_cast< HierarchyContent * >( xChild.get() ) );
+            }
+        }
+    }
+}
+
+
+bool HierarchyContent::exchangeIdentity(
+            const uno::Reference< ucb::XContentIdentifier >& xNewId )
+{
+    if ( !xNewId.is() )
+        return false;
+
+    osl::ClearableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< ucb::XContent > xThis = this;
+
+    // Already persistent?
+    if ( m_eState != PERSISTENT )
+    {
+        OSL_FAIL( "HierarchyContent::exchangeIdentity - Not persistent!" );
+        return false;
+    }
+
+    // Am I the root folder?
+    if ( m_eKind == ROOT )
+    {
+        OSL_FAIL( "HierarchyContent::exchangeIdentity - "
+                               "Not supported by root folder!" );
+        return false;
+    }
+
+    // Exchange own identity.
+
+    // Fail, if a content with given id already exists.
+    if ( !hasData( xNewId ) )
+    {
+        OUString aOldURL = m_xIdentifier->getContentIdentifier();
+
+        aGuard.clear();
+        if ( exchange( xNewId ) )
+        {
+            if ( m_eKind == FOLDER )
+            {
+                // Process instantiated children...
+
+                HierarchyContentRefVector aChildren;
+                queryChildren( aChildren );
+
+                for ( const auto& rChild : aChildren )
+                {
+                    HierarchyContentRef xChild = rChild;
+
+                    // Create new content identifier for the child...
+                    uno::Reference< ucb::XContentIdentifier > xOldChildId
+                                                    = xChild->getIdentifier();
+                    OUString aOldChildURL
+                        = xOldChildId->getContentIdentifier();
+                    OUString aNewChildURL
+                        = aOldChildURL.replaceAt(
+                                        0,
+                                        aOldURL.getLength(),
+                                        xNewId->getContentIdentifier() );
+                    uno::Reference< ucb::XContentIdentifier > xNewChildId
+                        = new ::ucbhelper::ContentIdentifier( aNewChildURL );
+
+                    if ( !xChild->exchangeIdentity( xNewChildId ) )
+                        return false;
+                }
+            }
+            return true;
+        }
+    }
+
+    OSL_FAIL( "HierarchyContent::exchangeIdentity - "
+                "Panic! Cannot exchange identity!" );
+    return false;
+}
+
+
+// static
+uno::Reference< sdbc::XRow > HierarchyContent::getPropertyValues(
+                const uno::Reference< uno::XComponentContext >& rxContext,
+                const uno::Sequence< beans::Property >& rProperties,
+                const HierarchyContentProperties& rData,
+                HierarchyContentProvider* pProvider,
+                const OUString& rContentId )
+{
+    // Note: Empty sequence means "get values of all supported properties".
+
+    rtl::Reference< ::ucbhelper::PropertyValueSet > xRow
+        = new ::ucbhelper::PropertyValueSet( rxContext );
+
+    if ( rProperties.hasElements() )
+    {
+        uno::Reference< beans::XPropertySet > xAdditionalPropSet;
+        bool bTriedToGetAdditionalPropSet = false;
+
+        for ( const beans::Property& rProp : rProperties )
+        {
+            // Process Core properties.
+
+            if ( rProp.Name == "ContentType" )
+            {
+                xRow->appendString ( rProp, rData.getContentType() );
+            }
+            else if ( rProp.Name == "Title" )
+            {
+                xRow->appendString ( rProp, rData.getTitle() );
+            }
+            else if ( rProp.Name == "IsDocument" )
+            {
+                xRow->appendBoolean( rProp, rData.getIsDocument() );
+            }
+            else if ( rProp.Name == "IsFolder" )
+            {
+                xRow->appendBoolean( rProp, rData.getIsFolder() );
+            }
+            else if ( rProp.Name == "CreatableContentsInfo" )
+            {
+                xRow->appendObject(
+                    rProp, uno::Any( rData.getCreatableContentsInfo() ) );
+            }
+            else if ( rProp.Name == "TargetURL" )
+            {
+                // TargetURL is only supported by links.
+
+                if ( rData.getIsDocument() )
+                    xRow->appendString( rProp, rData.getTargetURL() );
+                else
+                    xRow->appendVoid( rProp );
+            }
+            else
+            {
+                // Not a Core Property! Maybe it's an Additional Core Property?!
+
+                if ( !bTriedToGetAdditionalPropSet && !xAdditionalPropSet.is() )
+                {
+                    xAdditionalPropSet =
+                            pProvider->getAdditionalPropertySet( rContentId,
+                                                                 false );
+                    bTriedToGetAdditionalPropSet = true;
+                }
+
+                if ( xAdditionalPropSet.is() )
+                {
+                    if ( !xRow->appendPropertySetValue(
+                                                xAdditionalPropSet,
+                                                rProp ) )
+                    {
+                        // Append empty entry.
+                        xRow->appendVoid( rProp );
+                    }
+                }
+                else
+                {
+                    // Append empty entry.
+                    xRow->appendVoid( rProp );
+                }
+            }
+        }
+    }
+    else
+    {
+        // Append all Core Properties.
+        xRow->appendString (
+            beans::Property( "ContentType",
+                      -1,
+                      cppu::UnoType<OUString>::get(),
+                      beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY ),
+            rData.getContentType() );
+        xRow->appendString (
+            beans::Property( "Title",
+                      -1,
+                      cppu::UnoType<OUString>::get(),
+                          // @@@ Might actually be read-only!
+                      beans::PropertyAttribute::BOUND ),
+            rData.getTitle() );
+        xRow->appendBoolean(
+            beans::Property( "IsDocument",
+                      -1,
+                      cppu::UnoType<bool>::get(),
+                      beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY ),
+            rData.getIsDocument() );
+        xRow->appendBoolean(
+            beans::Property( "IsFolder",
+                      -1,
+                      cppu::UnoType<bool>::get(),
+                      beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY ),
+            rData.getIsFolder() );
+
+        if ( rData.getIsDocument() )
+            xRow->appendString(
+                beans::Property( "TargetURL",
+                          -1,
+                          cppu::UnoType<OUString>::get(),
+                          // @@@ Might actually be read-only!
+                          beans::PropertyAttribute::BOUND ),
+                rData.getTargetURL() );
+        xRow->appendObject(
+            beans::Property(
+                "CreatableContentsInfo",
+                -1,
+                cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                beans::PropertyAttribute::BOUND
+                | beans::PropertyAttribute::READONLY ),
+            uno::Any( rData.getCreatableContentsInfo() ) );
+
+        // Append all Additional Core Properties.
+
+        uno::Reference< beans::XPropertySet > xSet =
+            pProvider->getAdditionalPropertySet( rContentId, false );
+        xRow->appendPropertySet( xSet );
+    }
+
+    return xRow;
+}
+
+
+uno::Reference< sdbc::XRow > HierarchyContent::getPropertyValues(
+                        const uno::Sequence< beans::Property >& rProperties )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+    return getPropertyValues( m_xContext,
+                              rProperties,
+                              m_aProps,
+                              m_pProvider,
+                              m_xIdentifier->getContentIdentifier() );
+}
+
+
+uno::Sequence< uno::Any > HierarchyContent::setPropertyValues(
+        const uno::Sequence< beans::PropertyValue >& rValues,
+        const uno::Reference< ucb::XCommandEnvironment > & xEnv )
+{
+    osl::ResettableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Sequence< uno::Any > aRet( rValues.getLength() );
+    auto aRetRange = asNonConstRange(aRet);
+    uno::Sequence< beans::PropertyChangeEvent > aChanges( rValues.getLength() );
+    sal_Int32 nChanged = 0;
+
+    beans::PropertyChangeEvent aEvent;
+    aEvent.Source         = static_cast< cppu::OWeakObject * >( this );
+    aEvent.Further        = false;
+//    aEvent.PropertyName   =
+    aEvent.PropertyHandle = -1;
+//    aEvent.OldValue       =
+//    aEvent.NewValue       =
+
+    const beans::PropertyValue* pValues = rValues.getConstArray();
+    sal_Int32 nCount = rValues.getLength();
+
+    uno::Reference< ucb::XPersistentPropertySet > xAdditionalPropSet;
+    bool bTriedToGetAdditionalPropSet = false;
+
+    bool bExchange = false;
+    OUString aOldTitle;
+    OUString aOldName;
+    sal_Int32 nTitlePos = -1;
+
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const beans::PropertyValue& rValue = pValues[ n ];
+
+        if ( rValue.Name == "ContentType" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rValue.Name == "IsDocument" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rValue.Name == "IsFolder" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rValue.Name == "CreatableContentsInfo" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rValue.Name == "Title" )
+        {
+            if ( isReadOnly() )
+            {
+                aRetRange[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            else
+            {
+                OUString aNewValue;
+                if ( rValue.Value >>= aNewValue )
+                {
+                    // No empty titles!
+                    if ( !aNewValue.isEmpty() )
+                    {
+                        if ( aNewValue != m_aProps.getTitle() )
+                        {
+                            // modified title -> modified URL -> exchange !
+                            if ( m_eState == PERSISTENT )
+                                bExchange = true;
+
+                            aOldTitle = m_aProps.getTitle();
+                            aOldName  = m_aProps.getName();
+
+                            m_aProps.setTitle( aNewValue );
+                            m_aProps.setName(
+                                ::ucb_impl::urihelper::encodeSegment(
+                                    aNewValue ) );
+
+                            // property change event will be set later...
+
+                            // remember position within sequence of values
+                            // (for error handling).
+                            nTitlePos = n;
+                        }
+                    }
+                    else
+                    {
+                        aRetRange[ n ] <<= lang::IllegalArgumentException(
+                                    "Empty title not allowed!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 );
+                    }
+                }
+                else
+                {
+                    aRetRange[ n ] <<= beans::IllegalTypeException(
+                                "Property value has wrong type!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+                }
+            }
+        }
+        else if ( rValue.Name == "TargetURL" )
+        {
+            if ( isReadOnly() )
+            {
+                aRetRange[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            else
+            {
+                // TargetURL is only supported by links.
+
+                if ( m_eKind == LINK )
+                {
+                    OUString aNewValue;
+                    if ( rValue.Value >>= aNewValue )
+                    {
+                        // No empty target URL's!
+                        if ( !aNewValue.isEmpty() )
+                        {
+                            if ( aNewValue != m_aProps.getTargetURL() )
+                            {
+                                aEvent.PropertyName = rValue.Name;
+                                aEvent.OldValue <<= m_aProps.getTargetURL();
+                                aEvent.NewValue <<= aNewValue;
+
+                                aChanges.getArray()[ nChanged ] = aEvent;
+
+                                m_aProps.setTargetURL( aNewValue );
+                                nChanged++;
+                            }
+                        }
+                        else
+                        {
+                            aRetRange[ n ] <<= lang::IllegalArgumentException(
+                                    "Empty target URL not allowed!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 );
+                        }
+                    }
+                    else
+                    {
+                        aRetRange[ n ] <<= beans::IllegalTypeException(
+                                "Property value has wrong type!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+                    }
+                }
+                else
+                {
+                    aRetRange[ n ] <<= beans::UnknownPropertyException(
+                                "TargetURL only supported by links!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+                }
+            }
+        }
+        else
+        {
+            // Not a Core Property! Maybe it's an Additional Core Property?!
+
+            if ( !bTriedToGetAdditionalPropSet && !xAdditionalPropSet.is() )
+            {
+                xAdditionalPropSet = getAdditionalPropertySet( false );
+                bTriedToGetAdditionalPropSet = true;
+            }
+
+            if ( xAdditionalPropSet.is() )
+            {
+                try
+                {
+                    uno::Any aOldValue = xAdditionalPropSet->getPropertyValue(
+                                                                rValue.Name );
+                    if ( aOldValue != rValue.Value )
+                    {
+                        xAdditionalPropSet->setPropertyValue(
+                                                rValue.Name, rValue.Value );
+
+                        aEvent.PropertyName = rValue.Name;
+                        aEvent.OldValue     = aOldValue;
+                        aEvent.NewValue     = rValue.Value;
+
+                        aChanges.getArray()[ nChanged ] = aEvent;
+                        nChanged++;
+                    }
+                }
+                catch ( beans::UnknownPropertyException const & e )
+                {
+                    aRetRange[ n ] <<= e;
+                }
+                catch ( lang::WrappedTargetException const & e )
+                {
+                    aRetRange[ n ] <<= e;
+                }
+                catch ( beans::PropertyVetoException const & e )
+                {
+                    aRetRange[ n ] <<= e;
+                }
+                catch ( lang::IllegalArgumentException const & e )
+                {
+                    aRetRange[ n ] <<= e;
+                }
+            }
+            else
+            {
+                aRetRange[ n ] <<= uno::Exception(
+                                "No property set for storing the value!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+        }
+    }
+
+    if ( bExchange )
+    {
+        uno::Reference< ucb::XContentIdentifier > xOldId
+            = m_xIdentifier;
+        uno::Reference< ucb::XContentIdentifier > xNewId
+            = makeNewIdentifier( m_aProps.getTitle() );
+
+        aGuard.clear();
+        if ( exchangeIdentity( xNewId ) )
+        {
+            // Adapt persistent data.
+            renameData( xOldId, xNewId );
+
+            // Adapt Additional Core Properties.
+            renameAdditionalPropertySet( xOldId->getContentIdentifier(),
+                                         xNewId->getContentIdentifier() );
+        }
+        else
+        {
+            // Roll-back.
+            m_aProps.setTitle( aOldTitle );
+            m_aProps.setName ( aOldName );
+
+            aOldTitle.clear();
+            aOldName.clear();
+
+            // Set error .
+            aRetRange[ nTitlePos ] <<= uno::Exception(
+                    "Exchange failed!",
+                    static_cast< cppu::OWeakObject * >( this ) );
+        }
+        aGuard.reset();
+    }
+
+    if ( !aOldTitle.isEmpty() )
+    {
+        aEvent.PropertyName = "Title";
+        aEvent.OldValue     <<= aOldTitle;
+        aEvent.NewValue     <<= m_aProps.getTitle();
+
+        aChanges.getArray()[ nChanged ] = aEvent;
+        nChanged++;
+    }
+
+    if ( nChanged > 0 )
+    {
+        // Save changes, if content was already made persistent.
+        if ( !bExchange && ( m_eState == PERSISTENT ) )
+        {
+            if ( !storeData() )
+            {
+                uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+                {
+                    {"Uri", uno::Any(m_xIdentifier->getContentIdentifier())}
+                }));
+                ucbhelper::cancelCommandExecution(
+                    ucb::IOErrorCode_CANT_WRITE,
+                    aArgs,
+                    xEnv,
+                    "Cannot store persistent data!",
+                    this );
+                // Unreachable
+            }
+        }
+
+        aChanges.realloc( nChanged );
+
+        aGuard.clear();
+        notifyPropertiesChange( aChanges );
+    }
+
+    return aRet;
+}
+
+
+void HierarchyContent::insert( sal_Int32 nNameClashResolve,
+                               const uno::Reference<
+                                    ucb::XCommandEnvironment > & xEnv )
+{
+    osl::ClearableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    // Am I the root folder?
+    if ( m_eKind == ROOT )
+    {
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::UnsupportedCommandException(
+                                "Not supported by root folder!",
+                                static_cast< cppu::OWeakObject * >( this ) ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Check, if all required properties were set.
+    if ( m_aProps.getTitle().isEmpty() )
+    {
+        uno::Sequence<OUString> aProps { "Title" };
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::MissingPropertiesException(
+                                OUString(),
+                                static_cast< cppu::OWeakObject * >( this ),
+                                aProps ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Assemble new content identifier...
+
+    uno::Reference< ucb::XContentIdentifier > xId
+        = makeNewIdentifier( m_aProps.getTitle() );
+
+    // Handle possible name clash...
+
+    switch ( nNameClashResolve )
+    {
+        // fail.
+        case ucb::NameClash::ERROR:
+            if ( hasData( xId ) )
+            {
+                ucbhelper::cancelCommandExecution(
+                    uno::Any(
+                        ucb::NameClashException(
+                            OUString(),
+                            static_cast< cppu::OWeakObject * >( this ),
+                            task::InteractionClassification_ERROR,
+                            m_aProps.getTitle() ) ),
+                    xEnv );
+                // Unreachable
+            }
+            break;
+
+        // replace existing object.
+        case ucb::NameClash::OVERWRITE:
+            break;
+
+        // "invent" a new valid title.
+        case ucb::NameClash::RENAME:
+            if ( hasData( xId ) )
+            {
+                sal_Int32 nTry = 0;
+
+                do
+                {
+                    OUString aNewId = xId->getContentIdentifier() + "_";
+                    aNewId += OUString::number( ++nTry );
+                    xId = new ::ucbhelper::ContentIdentifier( aNewId );
+                }
+                while ( hasData( xId ) && ( nTry < 1000 ) );
+
+                if ( nTry == 1000 )
+                {
+                    ucbhelper::cancelCommandExecution(
+                        uno::Any(
+                            ucb::UnsupportedNameClashException(
+                                "Unable to resolve name clash!",
+                                static_cast< cppu::OWeakObject * >( this ),
+                                nNameClashResolve ) ),
+                    xEnv );
+                // Unreachable
+                }
+                else
+                {
+                    OUString aNewTitle( m_aProps.getTitle() + "_" + OUString::number( nTry ) );
+                    m_aProps.setTitle( aNewTitle );
+                }
+            }
+            break;
+
+        case ucb::NameClash::KEEP: // deprecated
+        case ucb::NameClash::ASK:
+        default:
+            if ( hasData( xId ) )
+            {
+                ucbhelper::cancelCommandExecution(
+                    uno::Any(
+                        ucb::UnsupportedNameClashException(
+                                OUString(),
+                                static_cast< cppu::OWeakObject * >( this ),
+                                nNameClashResolve ) ),
+                    xEnv );
+                // Unreachable
+            }
+            break;
+    }
+
+    // Identifier changed?
+    bool bNewId = ( xId->getContentIdentifier()
+                            != m_xIdentifier->getContentIdentifier() );
+    m_xIdentifier = xId;
+
+    if ( !storeData() )
+    {
+        uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+        {
+            {"Uri", uno::Any(m_xIdentifier->getContentIdentifier())}
+        }));
+        ucbhelper::cancelCommandExecution(
+            ucb::IOErrorCode_CANT_WRITE,
+            aArgs,
+            xEnv,
+            "Cannot store persistent data!",
+            this );
+        // Unreachable
+    }
+
+    m_eState = PERSISTENT;
+
+    if ( bNewId )
+    {
+        aGuard.clear();
+        inserted();
+    }
+}
+
+
+void HierarchyContent::destroy( bool bDeletePhysical,
+                                const uno::Reference<
+                                    ucb::XCommandEnvironment > & xEnv )
+{
+    // @@@ take care about bDeletePhysical -> trashcan support
+
+    osl::ClearableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< ucb::XContent > xThis = this;
+
+    // Persistent?
+    if ( m_eState != PERSISTENT )
+    {
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::UnsupportedCommandException(
+                                "Not persistent!",
+                                static_cast< cppu::OWeakObject * >( this ) ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Am I the root folder?
+    if ( m_eKind == ROOT )
+    {
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::UnsupportedCommandException(
+                                "Not supported by root folder!",
+                                static_cast< cppu::OWeakObject * >( this ) ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    m_eState = DEAD;
+
+    aGuard.clear();
+    deleted();
+
+    if ( m_eKind == FOLDER )
+    {
+        // Process instantiated children...
+
+        HierarchyContentRefVector aChildren;
+        queryChildren( aChildren );
+
+        for ( auto & child : aChildren)
+        {
+            child->destroy( bDeletePhysical, xEnv );
+        }
+    }
+}
+
+
+void HierarchyContent::transfer(
+            const ucb::TransferInfo& rInfo,
+            const uno::Reference< ucb::XCommandEnvironment > & xEnv )
+{
+    osl::ClearableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    // Persistent?
+    if ( m_eState != PERSISTENT )
+    {
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::UnsupportedCommandException(
+                                "Not persistent!",
+                                static_cast< cppu::OWeakObject * >( this ) ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Is source a hierarchy content?
+    if ( !rInfo.SourceURL.startsWith( HIERARCHY_URL_SCHEME ":/" ) )
+    {
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::InteractiveBadTransferURLException(
+                            OUString(),
+                            static_cast< cppu::OWeakObject * >( this ) ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Is source not a parent of me / not me?
+    OUString aId = m_xIdentifier->getContentIdentifier();
+    sal_Int32 nPos = aId.lastIndexOf( '/' );
+    if ( nPos != ( aId.getLength() - 1 ) )
+    {
+        // No trailing slash found. Append.
+        aId += "/";
+    }
+
+    if ( rInfo.SourceURL.getLength() <= aId.getLength() )
+    {
+        if ( aId.startsWith( rInfo.SourceURL ) )
+        {
+            uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+            {
+                {"Uri", uno::Any(rInfo.SourceURL)}
+            }));
+            ucbhelper::cancelCommandExecution(
+                ucb::IOErrorCode_RECURSIVE,
+                aArgs,
+                xEnv,
+                "Target is equal to or is a child of source!",
+                this );
+            // Unreachable
+        }
+    }
+
+
+    // 0) Obtain content object for source.
+
+
+    uno::Reference< ucb::XContentIdentifier > xId
+        = new ::ucbhelper::ContentIdentifier( rInfo.SourceURL );
+
+    // Note: The static cast is okay here, because its sure that
+    //       m_xProvider is always the HierarchyContentProvider.
+    rtl::Reference< HierarchyContent > xSource;
+
+    try
+    {
+        xSource = static_cast< HierarchyContent * >(
+                        m_xProvider->queryContent( xId ).get() );
+    }
+    catch ( ucb::IllegalIdentifierException const & )
+    {
+        // queryContent
+    }
+
+    if ( !xSource.is() )
+    {
+        uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+        {
+            {"Uri", uno::Any(xId->getContentIdentifier())}
+        }));
+        ucbhelper::cancelCommandExecution(
+            ucb::IOErrorCode_CANT_READ,
+            aArgs,
+            xEnv,
+            "Cannot instantiate source object!",
+            this );
+        // Unreachable
+    }
+
+
+    // 1) Create new child content.
+
+
+    OUString aType = xSource->isFolder()
+        ? OUString( HIERARCHY_FOLDER_CONTENT_TYPE )
+        : OUString( HIERARCHY_LINK_CONTENT_TYPE );
+    ucb::ContentInfo aContentInfo;
+    aContentInfo.Type = aType;
+    aContentInfo.Attributes = 0;
+
+    // Note: The static cast is okay here, because its sure that
+    //       createNewContent always creates a HierarchyContent.
+    rtl::Reference< HierarchyContent > xTarget
+        = static_cast< HierarchyContent * >(
+            createNewContent( aContentInfo ).get() );
+    if ( !xTarget.is() )
+    {
+        uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+        {
+            {"Folder", uno::Any(aId)}
+        }));
+        ucbhelper::cancelCommandExecution(
+            ucb::IOErrorCode_CANT_CREATE,
+            aArgs,
+            xEnv,
+            "XContentCreator::createNewContent failed!",
+            this );
+        // Unreachable
+    }
+
+
+    // 2) Copy data from source content to child content.
+
+
+    uno::Sequence< beans::Property > aSourceProps
+                    = xSource->getPropertySetInfo( xEnv )->getProperties();
+    sal_Int32 nCount = aSourceProps.getLength();
+
+    if ( nCount )
+    {
+        bool bHadTitle = rInfo.NewTitle.isEmpty();
+
+        // Get all source values.
+        uno::Reference< sdbc::XRow > xRow
+            = xSource->getPropertyValues( aSourceProps );
+
+        uno::Sequence< beans::PropertyValue > aValues( nCount );
+        beans::PropertyValue* pValues = aValues.getArray();
+
+        const beans::Property* pProps = aSourceProps.getConstArray();
+        for ( sal_Int32 n = 0; n < nCount; ++n )
+        {
+            const beans::Property& rProp  = pProps[ n ];
+            beans::PropertyValue&  rValue = pValues[ n ];
+
+            rValue.Name   = rProp.Name;
+            rValue.Handle = rProp.Handle;
+
+            if ( !bHadTitle && rProp.Name == "Title" )
+            {
+                // Set new title instead of original.
+                bHadTitle = true;
+                rValue.Value <<= rInfo.NewTitle;
+            }
+            else
+                rValue.Value = xRow->getObject(
+                                n + 1,
+                                uno::Reference< container::XNameAccess >() );
+
+            rValue.State = beans::PropertyState_DIRECT_VALUE;
+
+            if ( rProp.Attributes & beans::PropertyAttribute::REMOVABLE )
+            {
+                // Add Additional Core Property.
+                try
+                {
+                    xTarget->addProperty( rProp.Name,
+                                          rProp.Attributes,
+                                          rValue.Value );
+                }
+                catch ( beans::PropertyExistException const & )
+                {
+                }
+                catch ( beans::IllegalTypeException const & )
+                {
+                }
+                catch ( lang::IllegalArgumentException const & )
+                {
+                }
+            }
+        }
+
+        // Set target values.
+        xTarget->setPropertyValues( aValues, xEnv );
+    }
+
+
+    // 3) Commit (insert) child.
+
+
+    xTarget->insert( rInfo.NameClash, xEnv );
+
+
+    // 4) Transfer (copy) children of source.
+
+
+    if ( xSource->isFolder() )
+    {
+        HierarchyEntry aFolder(
+            m_xContext, m_pProvider, xId->getContentIdentifier() );
+        HierarchyEntry::iterator it;
+
+        while ( aFolder.next( it ) )
+        {
+            const HierarchyEntryData& rResult = *it;
+
+            OUString aChildId = xId->getContentIdentifier();
+            if ( ( aChildId.lastIndexOf( '/' ) + 1 ) != aChildId.getLength() )
+                aChildId += "/";
+
+            aChildId += rResult.getName();
+
+            ucb::TransferInfo aInfo;
+            aInfo.MoveData  = false;
+            aInfo.NewTitle.clear();
+            aInfo.SourceURL = aChildId;
+            aInfo.NameClash = rInfo.NameClash;
+
+            // Transfer child to target.
+            xTarget->transfer( aInfo, xEnv );
+        }
+    }
+
+
+    // 5) Destroy source ( when moving only ) .
+
+
+    if ( !rInfo.MoveData )
+        return;
+
+    xSource->destroy( true, xEnv );
+
+    // Remove all persistent data of source and its children.
+    if ( !xSource->removeData() )
+    {
+        uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+        {
+            {"Uri", uno::Any(xSource->m_xIdentifier->getContentIdentifier())}
+        }));
+        ucbhelper::cancelCommandExecution(
+            ucb::IOErrorCode_CANT_WRITE,
+            aArgs,
+            xEnv,
+            "Cannot remove persistent data of source object!",
+            this );
+        // Unreachable
+    }
+
+    // Remove own and all children's Additional Core Properties.
+    xSource->removeAdditionalPropertySet();
+}
+
+
+// HierarchyContentProperties Implementation.
+
+
+uno::Sequence< ucb::ContentInfo >
+HierarchyContentProperties::getCreatableContentsInfo() const
+{
+    if ( getIsFolder() )
+    {
+        uno::Sequence< ucb::ContentInfo > aSeq( 2 );
+
+        // Folder.
+        aSeq.getArray()[ 0 ].Type = HIERARCHY_FOLDER_CONTENT_TYPE;
+        aSeq.getArray()[ 0 ].Attributes = ucb::ContentInfoAttribute::KIND_FOLDER;
+
+        uno::Sequence< beans::Property > aFolderProps( 1 );
+        aFolderProps.getArray()[ 0 ] = beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND );
+        aSeq.getArray()[ 0 ].Properties = aFolderProps;
+
+        // Link.
+        aSeq.getArray()[ 1 ].Type = HIERARCHY_LINK_CONTENT_TYPE;
+        aSeq.getArray()[ 1 ].Attributes = ucb::ContentInfoAttribute::KIND_LINK;
+
+        uno::Sequence< beans::Property > aLinkProps( 2 );
+        aLinkProps.getArray()[ 0 ] = beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND );
+        aLinkProps.getArray()[ 1 ] = beans::Property(
+                    "TargetURL",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND );
+        aSeq.getArray()[ 1 ].Properties = aLinkProps;
+
+        return aSeq;
+    }
+    else
+    {
+        return uno::Sequence< ucb::ContentInfo >( 0 );
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchycontent.hxx b/ucb/source/ucp/hierarchy/hierarchycontent.hxx
new file mode 100644
index 000000000..94e75730a
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchycontent.hxx
@@ -0,0 +1,255 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vector>
+#include <rtl/ref.hxx>
+#include <com/sun/star/ucb/XContentCreator.hpp>
+#include <ucbhelper/contenthelper.hxx>
+#include "hierarchydata.hxx"
+#include "hierarchyprovider.hxx"
+
+namespace com::sun::star::beans {
+    struct Property;
+    struct PropertyValue;
+}
+
+namespace com::sun::star::sdbc {
+    class XRow;
+}
+
+namespace com::sun::star::ucb {
+    struct TransferInfo;
+}
+
+namespace hierarchy_ucp
+{
+
+
+class HierarchyContentProperties
+{
+public:
+    HierarchyContentProperties() {};
+
+    explicit HierarchyContentProperties( const HierarchyEntryData::Type & rType )
+    : m_aData( rType ),
+      m_aContentType( rType == HierarchyEntryData::FOLDER
+        ? OUString( HIERARCHY_FOLDER_CONTENT_TYPE )
+        : OUString( HIERARCHY_LINK_CONTENT_TYPE ) ) {}
+
+    explicit HierarchyContentProperties( const HierarchyEntryData & rData )
+    : m_aData( rData ),
+      m_aContentType( rData.getType() == HierarchyEntryData::FOLDER
+        ? OUString( HIERARCHY_FOLDER_CONTENT_TYPE )
+        : OUString( HIERARCHY_LINK_CONTENT_TYPE ) ) {}
+
+    const OUString & getName() const { return m_aData.getName(); }
+    void setName( const OUString & rName ) { m_aData.setName( rName ); };
+
+    const OUString & getTitle() const { return m_aData.getTitle(); }
+    void setTitle( const OUString & rTitle )
+    { m_aData.setTitle( rTitle ); };
+
+    const OUString & getTargetURL() const
+    { return m_aData.getTargetURL(); }
+    void setTargetURL( const OUString & rURL )
+    { m_aData.setTargetURL( rURL ); };
+
+    const OUString & getContentType() const { return m_aContentType; }
+
+    bool getIsFolder() const
+    { return m_aData.getType() == HierarchyEntryData::FOLDER; }
+
+    bool getIsDocument() const { return !getIsFolder(); }
+
+    css::uno::Sequence< css::ucb::ContentInfo >
+    getCreatableContentsInfo() const;
+
+    const HierarchyEntryData & getHierarchyEntryData() const { return m_aData; }
+
+private:
+    HierarchyEntryData m_aData;
+    OUString m_aContentType;
+};
+
+
+class HierarchyContentProvider;
+
+class HierarchyContent : public ::ucbhelper::ContentImplHelper,
+                         public css::ucb::XContentCreator
+{
+    enum ContentKind  { LINK, FOLDER, ROOT };
+    enum ContentState { TRANSIENT,  // created via CreateNewContent,
+                                        // but did not process "insert" yet
+                        PERSISTENT, // processed "insert"
+                        DEAD        // processed "delete"
+                      };
+
+    HierarchyContentProperties m_aProps;
+    ContentKind                m_eKind;
+    ContentState               m_eState;
+    HierarchyContentProvider*  m_pProvider;
+    bool                       m_bCheckedReadOnly;
+    bool                       m_bIsReadOnly;
+
+private:
+    HierarchyContent(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+            const HierarchyContentProperties& rProps );
+    HierarchyContent(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+            const css::ucb::ContentInfo& Info );
+
+    virtual css::uno::Sequence< css::beans::Property >
+    getProperties( const css::uno::Reference<css::ucb::XCommandEnvironment > & xEnv ) override;
+    virtual css::uno::Sequence< css::ucb::CommandInfo >
+    getCommands( const css::uno::Reference< css::ucb::XCommandEnvironment > & xEnv ) override;
+    virtual OUString getParentURL() override;
+
+    static bool hasData(
+            const css::uno::Reference<  css::uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier );
+    bool hasData(
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier )
+    { return hasData( m_xContext, m_pProvider, Identifier ); }
+    static bool loadData(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+            HierarchyContentProperties& rProps );
+    bool storeData();
+    void renameData( const css::uno::Reference< css::ucb::XContentIdentifier >& xOldId,
+                     const css::uno::Reference< css::ucb::XContentIdentifier >& xNewId );
+    bool removeData();
+
+    void setKind( const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier );
+
+    bool isReadOnly();
+
+    bool isFolder() const { return ( m_eKind > LINK ); }
+
+    css::uno::Reference< css::ucb::XContentIdentifier >
+    makeNewIdentifier( const OUString& rTitle );
+
+    typedef rtl::Reference< HierarchyContent > HierarchyContentRef;
+    typedef std::vector< HierarchyContentRef > HierarchyContentRefVector;
+    void queryChildren( HierarchyContentRefVector& rChildren );
+
+    bool exchangeIdentity(
+                const css::uno::Reference< css::ucb::XContentIdentifier >& xNewId );
+
+    css::uno::Reference< css::sdbc::XRow >
+    getPropertyValues( const css::uno::Sequence< css::beans::Property >& rProperties );
+    /// @throws css::uno::Exception
+    css::uno::Sequence< css::uno::Any >
+    setPropertyValues(
+            const css::uno::Sequence< css::beans::PropertyValue >& rValues,
+            const css::uno::Reference< css::ucb::XCommandEnvironment > & xEnv );
+
+    /// @throws css::uno::Exception
+    void insert( sal_Int32 nNameClashResolve,
+                 const css::uno::Reference< css::ucb::XCommandEnvironment > & xEnv );
+
+    /// @throws css::uno::Exception
+    void destroy( bool bDeletePhysical,
+                  const css::uno::Reference< css::ucb::XCommandEnvironment > & xEnv );
+
+    /// @throws css::uno::Exception
+    void transfer( const css::ucb::TransferInfo& rInfo,
+                   const css::uno::Reference< css::ucb::XCommandEnvironment > & xEnv );
+
+public:
+    // Create existing content. Fail, if not already exists.
+    static rtl::Reference<HierarchyContent> create(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const css::uno::Reference<
+                css::ucb::XContentIdentifier >& Identifier );
+
+    // Create new content. Fail, if already exists.
+    static rtl::Reference<HierarchyContent> create(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            HierarchyContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+            const css::ucb::ContentInfo& Info );
+
+    virtual ~HierarchyContent() override;
+
+    // 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;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL
+    getImplementationName() override;
+    virtual css::uno::Sequence< OUString > SAL_CALL
+    getSupportedServiceNames() override;
+
+    // XContent
+    virtual OUString SAL_CALL
+    getContentType() override;
+    virtual css::uno::Reference< css::ucb::XContentIdentifier > SAL_CALL
+    getIdentifier() override;
+
+    // XCommandProcessor
+    virtual css::uno::Any SAL_CALL
+    execute( const css::ucb::Command& aCommand,
+             sal_Int32 CommandId,
+             const css::uno::Reference< css::ucb::XCommandEnvironment >& Environment ) override;
+    virtual void SAL_CALL
+    abort( sal_Int32 CommandId ) override;
+
+
+    // Additional interfaces
+
+
+    // XContentCreator
+    virtual css::uno::Sequence< css::ucb::ContentInfo > SAL_CALL
+    queryCreatableContentsInfo() override;
+    virtual css::uno::Reference< css::ucb::XContent > SAL_CALL
+    createNewContent( const css::ucb::ContentInfo& Info ) override;
+
+
+    // Non-interface methods.
+
+
+    static css::uno::Reference< css::sdbc::XRow >
+    getPropertyValues( const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                       const css::uno::Sequence< css::beans::Property >& rProperties,
+                       const HierarchyContentProperties& rData,
+                       HierarchyContentProvider* pProvider,
+                       const OUString& rContentId );
+};
+
+} // namespace hierarchy_ucp
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchycontentcaps.cxx b/ucb/source/ucp/hierarchy/hierarchycontentcaps.cxx
new file mode 100644
index 000000000..836a136f6
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchycontentcaps.cxx
@@ -0,0 +1,681 @@
+/* -*- 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
+ **************************************************************************
+
+ **************************************************************************
+
+    Props/Commands:
+
+                           root    folder  folder  link    link
+                                   (new)           (new)
+    ----------------------------------------------------------------
+    ContentType            x       x       x       x       x
+    IsDocument             x       x       x       x       x
+    IsFolder               x       x       x       x       x
+    Title                  x       x       x       x       x
+    TargetURL                                      x       x
+    CreatableContentsInfo  x       x       x       x       x
+
+    getCommandInfo         x       x       x       x       x
+    getPropertySetInfo     x       x       x       x       x
+    getPropertyValues      x       x       x       x       x
+    setPropertyValues      x       x       x       x       x
+    createNewContent       x               x
+    insert                                 x               x
+    delete                         x               x
+    open                   x       x
+    transfer               x       x
+
+ *************************************************************************/
+
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/PropertyAttribute.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/ucb/CommandInfo.hpp>
+#include <com/sun/star/ucb/OpenCommandArgument2.hpp>
+#include <com/sun/star/ucb/TransferInfo.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <sal/macros.h>
+#include "hierarchycontent.hxx"
+
+using namespace com::sun::star;
+using namespace hierarchy_ucp;
+
+
+// HierarchyContent implementation.
+
+
+#define MAKEPROPSEQUENCE( a ) \
+    uno::Sequence< beans::Property >( a, SAL_N_ELEMENTS( a ) )
+
+#define MAKECMDSEQUENCE( a ) \
+    uno::Sequence< ucb::CommandInfo >( a, SAL_N_ELEMENTS( a ) )
+
+
+// IMPORTANT: If any property data ( name / type / ... ) are changed, then
+//            HierarchyContent::getPropertyValues(...) must be adapted too!
+
+
+// virtual
+uno::Sequence< beans::Property > HierarchyContent::getProperties(
+            const uno::Reference< ucb::XCommandEnvironment > & /*xEnv*/ )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( m_eKind == LINK )
+    {
+
+
+        // Link: Supported properties
+
+
+        if ( isReadOnly() )
+        {
+            static const beans::Property aLinkPropertyInfoTable[] =
+            {
+
+                // Required properties
+
+                beans::Property(
+                    "ContentType",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsDocument",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsFolder",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+
+                // Optional standard properties
+
+                beans::Property(
+                    "TargetURL",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "CreatableContentsInfo",
+                    -1,
+                    cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY )
+
+                // New properties
+
+            };
+            return MAKEPROPSEQUENCE( aLinkPropertyInfoTable );
+        }
+        else
+        {
+            static const beans::Property aLinkPropertyInfoTable[] =
+            {
+
+                // Required properties
+
+                beans::Property(
+                    "ContentType",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsDocument",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsFolder",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                ),
+
+                // Optional standard properties
+
+                beans::Property(
+                    "TargetURL",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                ),
+                beans::Property(
+                    "CreatableContentsInfo",
+                    -1,
+                    cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY )
+
+                // New properties
+
+            };
+            return MAKEPROPSEQUENCE( aLinkPropertyInfoTable );
+        }
+    }
+    else if ( m_eKind == FOLDER )
+    {
+
+
+        // Folder: Supported properties
+
+
+        if ( isReadOnly() )
+        {
+            static const beans::Property aFolderPropertyInfoTable[] =
+            {
+
+                // Required properties
+
+                beans::Property(
+                    "ContentType",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsDocument",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsFolder",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+
+                // Optional standard properties
+
+                beans::Property(
+                    "CreatableContentsInfo",
+                    -1,
+                    cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY )
+
+                // New properties
+
+            };
+            return MAKEPROPSEQUENCE( aFolderPropertyInfoTable );
+        }
+        else
+        {
+            static const beans::Property aFolderPropertyInfoTable[] =
+            {
+
+                // Required properties
+
+                beans::Property(
+                    "ContentType",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsDocument",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "IsFolder",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                ),
+                beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND
+                ),
+
+                // Optional standard properties
+
+                beans::Property(
+                    "CreatableContentsInfo",
+                    -1,
+                    cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY )
+
+                // New properties
+
+            };
+            return MAKEPROPSEQUENCE( aFolderPropertyInfoTable );
+        }
+    }
+    else
+    {
+
+
+        // Root Folder: Supported properties
+
+
+        // Currently no difference between read-only/read-write
+        // -> all props are read-only
+
+        static const beans::Property aRootFolderPropertyInfoTable[] =
+        {
+
+            // Required properties
+
+            beans::Property(
+                "ContentType",
+                -1,
+                cppu::UnoType<OUString>::get(),
+                beans::PropertyAttribute::BOUND
+                    | beans::PropertyAttribute::READONLY
+            ),
+            beans::Property(
+                "IsDocument",
+                -1,
+                cppu::UnoType<bool>::get(),
+                beans::PropertyAttribute::BOUND
+                    | beans::PropertyAttribute::READONLY
+            ),
+            beans::Property(
+                "IsFolder",
+                -1,
+                cppu::UnoType<bool>::get(),
+                beans::PropertyAttribute::BOUND
+                    | beans::PropertyAttribute::READONLY
+            ),
+            beans::Property(
+                "Title",
+                -1,
+                cppu::UnoType<OUString>::get(),
+                beans::PropertyAttribute::BOUND
+                    | beans::PropertyAttribute::READONLY
+            ),
+
+            // Optional standard properties
+
+            beans::Property(
+                    "CreatableContentsInfo",
+                    -1,
+                    cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY )
+
+            // New properties
+
+        };
+        return MAKEPROPSEQUENCE( aRootFolderPropertyInfoTable );
+    }
+}
+
+
+// virtual
+uno::Sequence< ucb::CommandInfo > HierarchyContent::getCommands(
+            const uno::Reference< ucb::XCommandEnvironment > & /*xEnv*/ )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( m_eKind == LINK )
+    {
+
+
+        // Link: Supported commands
+
+
+        if ( isReadOnly() )
+        {
+            static const ucb::CommandInfo aLinkCommandInfoTable[] =
+            {
+
+                // Required commands
+
+                ucb::CommandInfo(
+                    "getCommandInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertySetInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::Property >>::get()
+                ),
+                ucb::CommandInfo(
+                    "setPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::PropertyValue >>::get()
+                )
+
+                // Optional standard commands
+
+
+                // New commands
+
+            };
+            return MAKECMDSEQUENCE( aLinkCommandInfoTable );
+        }
+        else
+        {
+            static const ucb::CommandInfo aLinkCommandInfoTable[] =
+            {
+
+                // Required commands
+
+                ucb::CommandInfo(
+                    "getCommandInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertySetInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::Property >>::get()
+                ),
+                ucb::CommandInfo(
+                    "setPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::PropertyValue >>::get()
+                ),
+
+                // Optional standard commands
+
+                ucb::CommandInfo(
+                    "delete",
+                    -1,
+                    cppu::UnoType<bool>::get()
+                ),
+                ucb::CommandInfo(
+                    "insert",
+                    -1,
+                    cppu::UnoType<void>::get()
+                )
+
+                // New commands
+
+            };
+            return MAKECMDSEQUENCE( aLinkCommandInfoTable );
+        }
+    }
+    else if ( m_eKind == FOLDER )
+    {
+
+
+        // Folder: Supported commands
+
+
+        if ( isReadOnly() )
+        {
+            static const ucb::CommandInfo aFolderCommandInfoTable[] =
+            {
+
+                // Required commands
+
+                ucb::CommandInfo(
+                    "getCommandInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertySetInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::Property >>::get()
+                ),
+                ucb::CommandInfo(
+                    "setPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::PropertyValue >>::get()
+                ),
+
+                // Optional standard commands
+
+                ucb::CommandInfo(
+                    "open",
+                    -1,
+                    cppu::UnoType<ucb::OpenCommandArgument2>::get()
+                )
+
+                // New commands
+
+            };
+            return MAKECMDSEQUENCE( aFolderCommandInfoTable );
+        }
+        else
+        {
+            static const ucb::CommandInfo aFolderCommandInfoTable[] =
+            {
+
+                // Required commands
+
+                ucb::CommandInfo(
+                    "getCommandInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertySetInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::Property >>::get()
+                ),
+                ucb::CommandInfo(
+                    "setPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::PropertyValue >>::get()
+                ),
+
+                // Optional standard commands
+
+                ucb::CommandInfo(
+                    "delete",
+                    -1,
+                    cppu::UnoType<bool>::get()
+                ),
+                ucb::CommandInfo(
+                    "insert",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "open",
+                    -1,
+                    cppu::UnoType<ucb::OpenCommandArgument2>::get()
+                ),
+                ucb::CommandInfo(
+                    "transfer",
+                    -1,
+                    cppu::UnoType<ucb::TransferInfo>::get()
+                ),
+                ucb::CommandInfo(
+                    "createNewContent",
+                    -1,
+                    cppu::UnoType<ucb::ContentInfo>::get()
+                )
+
+                // New commands
+
+            };
+            return MAKECMDSEQUENCE( aFolderCommandInfoTable );
+        }
+    }
+    else
+    {
+
+
+        // Root Folder: Supported commands
+
+
+        if ( isReadOnly() )
+        {
+            static const ucb::CommandInfo aRootFolderCommandInfoTable[] =
+            {
+
+                // Required commands
+
+                ucb::CommandInfo(
+                    "getCommandInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertySetInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::Property >>::get()
+                ),
+                ucb::CommandInfo(
+                    "setPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::PropertyValue >>::get()
+                ),
+
+                // Optional standard commands
+
+                ucb::CommandInfo(
+                    "open",
+                    -1,
+                    cppu::UnoType<ucb::OpenCommandArgument2>::get()
+                )
+
+                // New commands
+
+            };
+            return MAKECMDSEQUENCE( aRootFolderCommandInfoTable );
+        }
+        else
+        {
+            static const ucb::CommandInfo aRootFolderCommandInfoTable[] =
+            {
+
+                // Required commands
+
+                ucb::CommandInfo(
+                    "getCommandInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertySetInfo",
+                    -1,
+                    cppu::UnoType<void>::get()
+                ),
+                ucb::CommandInfo(
+                    "getPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::Property >>::get()
+                ),
+                ucb::CommandInfo(
+                    "setPropertyValues",
+                    -1,
+                    cppu::UnoType<uno::Sequence< beans::PropertyValue >>::get()
+                ),
+
+                // Optional standard commands
+
+                ucb::CommandInfo(
+                    "open",
+                    -1,
+                    cppu::UnoType<ucb::OpenCommandArgument2>::get()
+                ),
+                ucb::CommandInfo(
+                    "transfer",
+                    -1,
+                    cppu::UnoType<ucb::TransferInfo>::get()
+                ),
+                ucb::CommandInfo(
+                    "createNewContent",
+                    -1,
+                    cppu::UnoType<ucb::ContentInfo>::get()
+                )
+
+                // New commands
+
+            };
+            return MAKECMDSEQUENCE( aRootFolderCommandInfoTable );
+        }
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchydata.cxx b/ucb/source/ucp/hierarchy/hierarchydata.cxx
new file mode 100644
index 000000000..3e802a4fd
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchydata.cxx
@@ -0,0 +1,1098 @@
+/* -*- 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
+ **************************************************************************
+
+ - HierarchyEntry::move
+   --> Rewrite to use XNamed ( once this is supported by config db api ).
+
+ *************************************************************************/
+#include "hierarchydata.hxx"
+
+#include <tools/diagnose_ex.h>
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XNameReplace.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/util/XOfficeInstallationDirectories.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <comphelper/propertysequence.hxx>
+#include "hierarchyprovider.hxx"
+#include "hierarchyuri.hxx"
+
+using namespace com::sun::star;
+
+namespace hierarchy_ucp
+{
+
+
+static void makeXMLName( const OUString & rIn, OUStringBuffer & rBuffer  )
+{
+    sal_Int32 nCount = rIn.getLength();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const sal_Unicode c = rIn[ n ];
+        switch ( c )
+        {
+            case '&':
+                rBuffer.append( "&amp;" );
+                break;
+
+            case '"':
+                rBuffer.append( "&quot;" );
+                break;
+
+            case '\'':
+                rBuffer.append( "&apos;" );
+                break;
+
+            case '<':
+                rBuffer.append( "&lt;" );
+                break;
+
+            case '>':
+                rBuffer.append( "&gt;" );
+                break;
+
+            default:
+                rBuffer.append( c );
+                break;
+        }
+    }
+}
+
+
+// HierarchyEntry Implementation.
+
+
+constexpr OUStringLiteral READ_SERVICE_NAME = u"com.sun.star.ucb.HierarchyDataReadAccess";
+constexpr OUStringLiteral READWRITE_SERVICE_NAME = u"com.sun.star.ucb.HierarchyDataReadWriteAccess";
+
+// describe path of cfg entry
+constexpr OUStringLiteral CFGPROPERTY_NODEPATH = u"nodepath";
+
+
+HierarchyEntry::HierarchyEntry(
+                const uno::Reference< uno::XComponentContext >& rxContext,
+                HierarchyContentProvider* pProvider,
+                const OUString& rURL )
+: m_xContext( rxContext ),
+  m_xOfficeInstDirs( pProvider->getOfficeInstallationDirectories() ),
+  m_bTriedToGetRootReadAccess( false )
+{
+    HierarchyUri aUri( rURL );
+    m_aServiceSpecifier = aUri.getService();
+
+    m_xConfigProvider
+        = pProvider->getConfigProvider( m_aServiceSpecifier );
+    m_xRootReadAccess
+        = pProvider->getRootConfigReadNameAccess( m_aServiceSpecifier );
+
+    // Note: do not init m_aPath in init list. createPathFromHierarchyURL
+    //       needs m_xContext and m_aMutex.
+    m_aPath = createPathFromHierarchyURL( aUri );
+
+    // Extract language independent name from URL.
+    sal_Int32 nPos = rURL.lastIndexOf( '/' );
+    if ( nPos > HIERARCHY_URL_SCHEME_LENGTH )
+        m_aName = rURL.copy( nPos + 1 );
+    else
+        OSL_FAIL( "HierarchyEntry - Invalid URL!" );
+}
+
+
+bool HierarchyEntry::hasData()
+{
+    uno::Reference< container::XHierarchicalNameAccess > xRootReadAccess
+        = getRootReadAccess();
+
+    OSL_ENSURE( xRootReadAccess.is(), "HierarchyEntry::hasData - No root!" );
+
+    if ( xRootReadAccess.is() )
+        return xRootReadAccess->hasByHierarchicalName( m_aPath );
+
+    return false;
+}
+
+
+bool HierarchyEntry::getData( HierarchyEntryData& rData )
+{
+    try
+    {
+        uno::Reference< container::XHierarchicalNameAccess > xRootReadAccess
+            = getRootReadAccess();
+
+        OSL_ENSURE( xRootReadAccess.is(),
+                    "HierarchyEntry::getData - No root!" );
+
+        if ( xRootReadAccess.is() )
+        {
+            OUString aTitlePath = m_aPath + "/Title";
+
+            // Note: Avoid NoSuchElementExceptions, because exceptions are
+            //       relatively 'expensive'. Checking for availability of
+            //       title value is sufficient here, because if it is
+            //       there, the other values will be available too.
+            if ( !xRootReadAccess->hasByHierarchicalName( aTitlePath ) )
+                return false;
+
+            OUString aValue;
+
+            // Get Title value.
+            if ( !( xRootReadAccess->getByHierarchicalName( aTitlePath )
+                    >>= aValue ) )
+            {
+                OSL_FAIL( "HierarchyEntry::getData - "
+                            "Got no Title value!" );
+                return false;
+            }
+
+            rData.setTitle( aValue );
+
+            // Get TargetURL value.
+            OUString aTargetURLPath = m_aPath + "/TargetURL";
+            if ( !( xRootReadAccess->getByHierarchicalName( aTargetURLPath )
+                    >>= aValue ) )
+            {
+                OSL_FAIL( "HierarchyEntry::getData - "
+                            "Got no TargetURL value!" );
+                return false;
+            }
+
+            // TargetURL property may contain a reference to the Office
+            // installation directory. To ensure a reloctable office
+            // installation, the path to the office installation directory must
+            // never be stored directly. A placeholder is used instead. Replace
+            // it by actual installation directory.
+            if ( m_xOfficeInstDirs.is() &&  !aValue.isEmpty()  )
+                aValue = m_xOfficeInstDirs->makeAbsoluteURL( aValue );
+            rData.setTargetURL( aValue );
+
+            OUString aTypePath = m_aPath + "/Type";
+            if ( xRootReadAccess->hasByHierarchicalName( aTypePath ) )
+            {
+                // Might not be present since it was introduced long after
+                // Title and TargetURL (#82433#)... So not getting it is
+                // not an error.
+
+                // Get Type value.
+                sal_Int32 nType = 0;
+                if ( xRootReadAccess->getByHierarchicalName( aTypePath )
+                     >>= nType )
+                {
+                    if ( nType == 0 )
+                    {
+                        rData.setType( HierarchyEntryData::LINK );
+                    }
+                    else if ( nType == 1 )
+                    {
+                        rData.setType( HierarchyEntryData::FOLDER );
+                    }
+                    else
+                    {
+                        OSL_FAIL( "HierarchyEntry::getData - "
+                                    "Unknown Type value!" );
+                        return false;
+                    }
+                }
+            }
+
+            rData.setName( m_aName );
+            return true;
+        }
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+    return false;
+}
+
+
+bool HierarchyEntry::setData( const HierarchyEntryData& rData )
+{
+    try
+    {
+        std::unique_lock aGuard( m_aMutex );
+
+        if ( !m_xConfigProvider.is() )
+            m_xConfigProvider.set(
+                m_xContext->getServiceManager()->createInstanceWithContext(m_aServiceSpecifier, m_xContext),
+                uno::UNO_QUERY );
+
+        if ( m_xConfigProvider.is() )
+        {
+            // Create parent's key. It must exist!
+
+            OUString aParentPath;
+            bool bRoot = true;
+
+            sal_Int32 nPos = m_aPath.lastIndexOf( '/' );
+            if ( nPos != -1 )
+            {
+                // Skip "/Children" segment of the path, too.
+                nPos = m_aPath.lastIndexOf( '/', nPos - 1 );
+
+                OSL_ENSURE( nPos != -1,
+                            "HierarchyEntry::setData - Wrong path!" );
+
+                aParentPath += m_aPath.subView( 0, nPos );
+                bRoot = false;
+            }
+
+            uno::Sequence<uno::Any> aArguments(comphelper::InitAnyPropertySequence(
+            {
+                {CFGPROPERTY_NODEPATH, uno::Any(aParentPath)}
+            }));
+
+            uno::Reference< util::XChangesBatch > xBatch(
+                    m_xConfigProvider->createInstanceWithArguments(
+                        READWRITE_SERVICE_NAME,
+                        aArguments ),
+                    uno::UNO_QUERY );
+
+            OSL_ENSURE( xBatch.is(),
+                        "HierarchyEntry::setData - No batch!" );
+
+            uno::Reference< container::XNameAccess > xParentNameAccess(
+                xBatch, uno::UNO_QUERY );
+
+            OSL_ENSURE( xParentNameAccess.is(),
+                        "HierarchyEntry::setData - No name access!" );
+
+            if ( xBatch.is() && xParentNameAccess.is() )
+            {
+                // Try to create own key. It must not exist!
+
+                bool bExists = true;
+                uno::Any aMyKey;
+
+                try
+                {
+                    uno::Reference< container::XNameAccess > xNameAccess;
+
+                    if ( bRoot )
+                    {
+                        xNameAccess = xParentNameAccess;
+                    }
+                    else
+                    {
+                        xParentNameAccess->getByName("Children") >>= xNameAccess;
+                    }
+
+                    if ( xNameAccess->hasByName( m_aName ) )
+                        aMyKey = xNameAccess->getByName( m_aName );
+                    else
+                        bExists = false;
+                }
+                catch ( container::NoSuchElementException const & )
+                {
+                    bExists = false;
+                }
+
+                uno::Reference< container::XNameReplace >   xNameReplace;
+                uno::Reference< container::XNameContainer > xContainer;
+
+                if ( bExists )
+                {
+                    // Key exists. Replace values.
+
+                    aMyKey >>= xNameReplace;
+
+                    OSL_ENSURE( xNameReplace.is(),
+                                "HierarchyEntry::setData - No name replace!" );
+                }
+                else
+                {
+                    // Key does not exist. Create / fill / insert it.
+
+                    uno::Reference< lang::XSingleServiceFactory > xFac;
+
+                    if ( bRoot )
+                    {
+                        // Special handling for children of root,
+                        // which is not an entry. It's only a set
+                        // of entries.
+                        xFac.set( xParentNameAccess, uno::UNO_QUERY );
+                    }
+                    else
+                    {
+                        // Append new entry to parents child list,
+                        // which is a set of entries.
+                        xParentNameAccess->getByName("Children") >>= xFac;
+                    }
+
+                    OSL_ENSURE( xFac.is(),
+                                "HierarchyEntry::setData - No factory!" );
+
+                    if ( xFac.is() )
+                    {
+                        xNameReplace.set( xFac->createInstance(), uno::UNO_QUERY );
+
+                        OSL_ENSURE( xNameReplace.is(),
+                                "HierarchyEntry::setData - No name replace!" );
+
+                        if ( xNameReplace.is() )
+                        {
+                            xContainer.set( xFac, uno::UNO_QUERY );
+
+                            OSL_ENSURE( xContainer.is(),
+                                "HierarchyEntry::setData - No container!" );
+                        }
+                    }
+                }
+
+                if ( xNameReplace.is() )
+                {
+                    // Set Title value.
+                    xNameReplace->replaceByName(
+                        "Title",
+                        uno::Any( rData.getTitle() ) );
+
+                    // Set TargetURL value.
+
+                    // TargetURL property may contain a reference to the Office
+                    // installation directory. To ensure a reloctable office
+                    // installation, the path to the office installation
+                    // directory must never be stored directly. Use a
+                    // placeholder instead.
+                    OUString aValue( rData.getTargetURL() );
+                    if ( m_xOfficeInstDirs.is() &&  !aValue.isEmpty() )
+                        aValue
+                            = m_xOfficeInstDirs->makeRelocatableURL( aValue );
+
+                    xNameReplace->replaceByName(
+                        "TargetURL",
+                        uno::Any( aValue ) );
+
+                    // Set Type value.
+                    sal_Int32 nType
+                        = rData.getType() == HierarchyEntryData::LINK ? 0 : 1;
+                    xNameReplace->replaceByName(
+                        "Type",
+                        uno::Any( nType ) );
+
+                    if ( xContainer.is() )
+                        xContainer->insertByName(
+                            m_aName, uno::Any( xNameReplace ) );
+
+                    // Commit changes.
+                    xBatch->commitChanges();
+                    return true;
+                }
+            }
+        }
+    }
+    catch ( lang::IllegalArgumentException const & )
+    {
+        // replaceByName, insertByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // replaceByName, getByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+    catch ( container::ElementExistException const & )
+    {
+        // insertByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        // replaceByName, insertByName, getByName, commitChanges
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+    catch ( uno::Exception const & )
+    {
+        // createInstance, createInstanceWithArguments
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+
+    return false;
+}
+
+
+bool HierarchyEntry::move(
+    const OUString& rNewURL, const HierarchyEntryData& rData )
+{
+    OUString aNewPath = createPathFromHierarchyURL( HierarchyUri(rNewURL) );
+
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( aNewPath == m_aPath )
+        return true;
+
+    bool bOldRoot = true;
+    uno::Reference< util::XChangesBatch > xOldParentBatch;
+
+    OUString aNewKey;
+    sal_Int32 nURLPos = rNewURL.lastIndexOf( '/' );
+    if ( nURLPos > HIERARCHY_URL_SCHEME_LENGTH )
+        aNewKey = rNewURL.copy( nURLPos + 1 );
+    else
+    {
+        OSL_FAIL( "HierarchyEntry::move - Invalid URL!" );
+        return false;
+    }
+
+    bool bNewRoot = true;
+    uno::Reference< util::XChangesBatch > xNewParentBatch;
+
+    bool bDifferentParents = true;
+
+    try
+    {
+        if ( !m_xConfigProvider.is() )
+            m_xConfigProvider.set(
+                m_xContext->getServiceManager()->createInstanceWithContext(m_aServiceSpecifier, m_xContext),
+                uno::UNO_QUERY );
+
+        if ( !m_xConfigProvider.is() )
+            return false;
+
+        OUString aOldParentPath;
+        sal_Int32 nPos = m_aPath.lastIndexOf( '/' );
+        if ( nPos != -1 )
+        {
+            // Skip "/Children" segment of the path, too.
+            nPos = m_aPath.lastIndexOf( '/', nPos - 1 );
+
+            OSL_ENSURE( nPos != -1, "HierarchyEntry::move - Wrong path!" );
+
+            aOldParentPath += m_aPath.subView( 0, nPos );
+            bOldRoot = false;
+        }
+
+        OUString aNewParentPath;
+        nPos = aNewPath.lastIndexOf( '/' );
+        if ( nPos != -1 )
+        {
+            // Skip "/Children" segment of the path, too.
+            nPos = aNewPath.lastIndexOf( '/', nPos - 1 );
+
+            OSL_ENSURE( nPos != -1, "HierarchyEntry::move - Wrong path!" );
+
+            aNewParentPath += aNewPath.subView( 0, nPos );
+            bNewRoot = false;
+        }
+
+        uno::Sequence<uno::Any> aArguments(comphelper::InitAnyPropertySequence(
+        {
+            {CFGPROPERTY_NODEPATH, uno::Any(aOldParentPath)}
+        }));
+
+        xOldParentBatch.set(
+            m_xConfigProvider->createInstanceWithArguments(
+                READWRITE_SERVICE_NAME,
+                aArguments ),
+            uno::UNO_QUERY );
+
+        OSL_ENSURE( xOldParentBatch.is(), "HierarchyEntry::move - No batch!" );
+
+        if ( !xOldParentBatch.is() )
+            return false;
+
+        if ( aOldParentPath == aNewParentPath )
+        {
+            bDifferentParents = false;
+            xNewParentBatch = xOldParentBatch;
+        }
+        else
+        {
+            bDifferentParents = true;
+
+            uno::Sequence<uno::Any> aArguments2(comphelper::InitAnyPropertySequence(
+            {
+                {CFGPROPERTY_NODEPATH, uno::Any(aNewParentPath)}
+            }));
+
+            xNewParentBatch.set(
+                m_xConfigProvider->createInstanceWithArguments(
+                    READWRITE_SERVICE_NAME,
+                    aArguments2 ),
+                uno::UNO_QUERY );
+
+            OSL_ENSURE(
+                xNewParentBatch.is(), "HierarchyEntry::move - No batch!" );
+
+            if ( !xNewParentBatch.is() )
+                return false;
+        }
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( uno::Exception const & )
+    {
+        // createInstance, createInstanceWithArguments
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+
+
+    // (1) Get entry...
+
+
+    uno::Any aEntry;
+    uno::Reference< container::XNameAccess >    xOldParentNameAccess;
+    uno::Reference< container::XNameContainer > xOldNameContainer;
+
+    try
+    {
+        xOldParentNameAccess.set( xOldParentBatch, uno::UNO_QUERY );
+
+        OSL_ENSURE( xOldParentNameAccess.is(),
+                    "HierarchyEntry::move - No name access!" );
+
+        if ( !xOldParentNameAccess.is() )
+            return false;
+
+        if ( bOldRoot )
+        {
+            xOldNameContainer.set( xOldParentNameAccess, uno::UNO_QUERY );
+        }
+        else
+        {
+            xOldParentNameAccess->getByName("Children") >>= xOldNameContainer;
+        }
+
+        aEntry = xOldNameContainer->getByName( m_aName );
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        // getByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+
+
+    // (2) Remove entry... Note: Insert BEFORE remove does not work!
+
+
+    try
+    {
+        xOldNameContainer->removeByName( m_aName );
+        xOldParentBatch->commitChanges();
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByName, removeByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+
+
+    // (3) Insert entry at new parent...
+
+
+    try
+    {
+        uno::Reference< container::XNameReplace > xNewNameReplace;
+        aEntry >>= xNewNameReplace;
+
+        OSL_ENSURE( xNewNameReplace.is(),
+                    "HierarchyEntry::move - No name replace!" );
+
+        if ( !xNewNameReplace.is() )
+            return false;
+
+        uno::Reference< container::XNameAccess > xNewParentNameAccess;
+        if ( bDifferentParents )
+            xNewParentNameAccess.set( xNewParentBatch, uno::UNO_QUERY );
+        else
+            xNewParentNameAccess = xOldParentNameAccess;
+
+        OSL_ENSURE( xNewParentNameAccess.is(),
+                    "HierarchyEntry::move - No name access!" );
+
+        if ( !xNewParentNameAccess.is() )
+            return false;
+
+        uno::Reference< container::XNameContainer > xNewNameContainer;
+        if ( bDifferentParents )
+        {
+            if ( bNewRoot )
+            {
+                xNewNameContainer.set( xNewParentNameAccess, uno::UNO_QUERY );
+            }
+            else
+            {
+                xNewParentNameAccess->getByName("Children") >>= xNewNameContainer;
+            }
+        }
+        else
+            xNewNameContainer = xOldNameContainer;
+
+        if ( !xNewNameContainer.is() )
+            return false;
+
+        xNewNameReplace->replaceByName(
+            "Title",
+            uno::Any( rData.getTitle() ) );
+
+        // TargetURL property may contain a reference to the Office
+        // installation directory. To ensure a reloctable office
+        // installation, the path to the office installation
+        // directory must never be stored directly. Use a placeholder
+        // instead.
+        OUString aValue( rData.getTargetURL() );
+        if ( m_xOfficeInstDirs.is() &&  !aValue.isEmpty() )
+            aValue = m_xOfficeInstDirs->makeRelocatableURL( aValue );
+        xNewNameReplace->replaceByName(
+            "TargetURL",
+            uno::Any( aValue ) );
+        sal_Int32 nType = rData.getType() == HierarchyEntryData::LINK ? 0 : 1;
+        xNewNameReplace->replaceByName(
+            "Type",
+            uno::Any( nType ) );
+
+        xNewNameContainer->insertByName( aNewKey, aEntry );
+        xNewParentBatch->commitChanges();
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // replaceByName, insertByName, getByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+    catch ( lang::IllegalArgumentException const & )
+    {
+        // replaceByName, insertByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+    catch ( container::ElementExistException const & )
+    {
+        // insertByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        // replaceByName, insertByName, getByName
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        return false;
+    }
+
+    return true;
+}
+
+
+bool HierarchyEntry::remove()
+{
+    try
+    {
+        std::unique_lock aGuard( m_aMutex );
+
+        if ( !m_xConfigProvider.is() )
+            m_xConfigProvider.set(
+                m_xContext->getServiceManager()->createInstanceWithContext(m_aServiceSpecifier, m_xContext),
+                uno::UNO_QUERY );
+
+        if ( m_xConfigProvider.is() )
+        {
+            // Create parent's key. It must exist!
+
+            OUString aParentPath;
+            bool bRoot = true;
+
+            sal_Int32 nPos = m_aPath.lastIndexOf( '/' );
+            if ( nPos != -1 )
+            {
+                // Skip "/Children" segment of the path, too.
+                nPos = m_aPath.lastIndexOf( '/', nPos - 1 );
+
+                OSL_ENSURE( nPos != -1,
+                            "HierarchyEntry::remove - Wrong path!" );
+
+                aParentPath += m_aPath.subView( 0, nPos );
+                bRoot = false;
+            }
+
+            uno::Sequence<uno::Any> aArguments(comphelper::InitAnyPropertySequence(
+            {
+                {CFGPROPERTY_NODEPATH, uno::Any(aParentPath)}
+            }));
+
+            uno::Reference< util::XChangesBatch > xBatch(
+                m_xConfigProvider->createInstanceWithArguments(
+                    READWRITE_SERVICE_NAME,
+                    aArguments ),
+                uno::UNO_QUERY );
+
+            OSL_ENSURE( xBatch.is(),
+                        "HierarchyEntry::remove - No batch!" );
+
+            uno::Reference< container::XNameAccess > xParentNameAccess(
+                xBatch, uno::UNO_QUERY );
+
+            OSL_ENSURE( xParentNameAccess.is(),
+                        "HierarchyEntry::remove - No name access!" );
+
+            if ( xBatch.is() && xParentNameAccess.is() )
+            {
+                uno::Reference< container::XNameContainer > xContainer;
+
+                if ( bRoot )
+                {
+                    // Special handling for children of root,
+                    // which is not an entry. It's only a set
+                    // of entries.
+                    xContainer.set( xParentNameAccess, uno::UNO_QUERY );
+                }
+                else
+                {
+                    // Append new entry to parents child list,
+                    // which is a set of entries.
+                     xParentNameAccess->getByName("Children") >>= xContainer;
+                }
+
+                OSL_ENSURE( xContainer.is(),
+                            "HierarchyEntry::remove - No container!" );
+
+                if ( xContainer.is() )
+                {
+                    xContainer->removeByName( m_aName );
+                    xBatch->commitChanges();
+                    return true;
+                }
+            }
+        }
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByName, removeByName
+
+        OSL_FAIL(
+            "HierarchyEntry::remove - caught NoSuchElementException!" );
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        // getByName, commitChanges
+
+        OSL_FAIL(
+            "HierarchyEntry::remove - caught WrappedTargetException!" );
+    }
+    catch ( uno::Exception const & )
+    {
+        // createInstance, createInstanceWithArguments
+
+        TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+    }
+
+    return false;
+}
+
+
+bool HierarchyEntry::first( iterator & it )
+{
+    if ( it.pos == -1 )
+    {
+        // Init...
+
+        try
+        {
+            uno::Reference< container::XHierarchicalNameAccess >
+                xRootHierNameAccess = getRootReadAccess();
+
+            if ( xRootHierNameAccess.is() )
+            {
+                uno::Reference< container::XNameAccess > xNameAccess;
+
+                if ( !m_aPath.isEmpty() )
+                {
+                    OUString aPath = m_aPath + "/Children";
+
+                    xRootHierNameAccess->getByHierarchicalName( aPath )
+                        >>= xNameAccess;
+                }
+                else
+                    xNameAccess.set( xRootHierNameAccess, uno::UNO_QUERY );
+
+                OSL_ENSURE( xNameAccess.is(),
+                            "HierarchyEntry::first - No name access!" );
+
+                if ( xNameAccess.is() )
+                    it.names = xNameAccess->getElementNames();
+
+                uno::Reference< container::XHierarchicalNameAccess >
+                    xHierNameAccess( xNameAccess, uno::UNO_QUERY );
+
+                OSL_ENSURE( xHierNameAccess.is(),
+                            "HierarchyEntry::first - No hier. name access!" );
+
+                it.dir = xHierNameAccess;
+
+                it.officeDirs = m_xOfficeInstDirs;
+            }
+        }
+        catch ( uno::RuntimeException const & )
+        {
+            throw;
+        }
+        catch ( container::NoSuchElementException const& )
+        {
+            // getByHierarchicalName
+
+            TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        }
+        catch ( uno::Exception const & )
+        {
+            TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+        }
+    }
+
+    if ( !it.names.hasElements() )
+        return false;
+
+    it.pos = 0;
+    return true;
+}
+
+
+bool HierarchyEntry::next( iterator& it )
+{
+    if ( it.pos == -1 )
+        return first( it );
+
+    ++it.pos;
+
+    return ( it.pos < it.names.getLength() );
+}
+
+
+OUString HierarchyEntry::createPathFromHierarchyURL(
+    const HierarchyUri& rURI )
+{
+    // Transform path...
+    // folder/subfolder/subsubfolder
+    //      --> ['folder']/Children/['subfolder']/Children/['subsubfolder']
+
+    const OUString aPath = rURI.getPath().copy( 1 ); // skip leading slash.
+    sal_Int32 nLen = aPath.getLength();
+
+    if ( nLen )
+    {
+        OUStringBuffer aNewPath;
+        aNewPath.append( "['" );
+
+        sal_Int32 nStart = 0;
+        sal_Int32 nEnd   = aPath.indexOf( '/' );
+
+        do
+        {
+            if ( nEnd == -1 )
+                nEnd = nLen;
+
+            OUString aToken = aPath.copy( nStart, nEnd - nStart );
+            makeXMLName( aToken, aNewPath );
+
+            if ( nEnd != nLen )
+            {
+                aNewPath.append( "']/Children/['" );
+                nStart = nEnd + 1;
+                nEnd   = aPath.indexOf( '/', nStart );
+            }
+            else
+                aNewPath.append( "']" );
+        }
+        while ( nEnd != nLen );
+
+        return aNewPath.makeStringAndClear();
+    }
+
+    return aPath;
+}
+
+
+uno::Reference< container::XHierarchicalNameAccess >
+HierarchyEntry::getRootReadAccess()
+{
+    if ( !m_xRootReadAccess.is() )
+    {
+        std::unique_lock aGuard( m_aMutex );
+        if ( !m_xRootReadAccess.is() )
+        {
+            if ( m_bTriedToGetRootReadAccess )
+            {
+                OSL_FAIL( "HierarchyEntry::getRootReadAccess - "
+                            "Unable to read any config data! -> #82494#" );
+                return uno::Reference< container::XHierarchicalNameAccess >();
+            }
+
+            try
+            {
+                if ( !m_xConfigProvider.is() )
+                    m_xConfigProvider.set(
+                            m_xContext->getServiceManager()->createInstanceWithContext(m_aServiceSpecifier, m_xContext),
+                            uno::UNO_QUERY );
+
+                if ( m_xConfigProvider.is() )
+                {
+                    // Create Root object.
+
+                    uno::Sequence<uno::Any> aArguments(comphelper::InitAnyPropertySequence(
+                    {
+                        {CFGPROPERTY_NODEPATH, uno::Any(OUString())} // root path
+                    }));
+
+                    m_bTriedToGetRootReadAccess = true;
+
+                    m_xRootReadAccess.set(
+                            m_xConfigProvider->createInstanceWithArguments(
+                                READ_SERVICE_NAME,
+                                aArguments ),
+                            uno::UNO_QUERY );
+                }
+            }
+            catch ( uno::RuntimeException const & )
+            {
+                throw;
+            }
+            catch ( uno::Exception const & )
+            {
+                // createInstance, createInstanceWithArguments
+
+                TOOLS_WARN_EXCEPTION("ucb.ucp", "");
+            }
+        }
+    }
+    return m_xRootReadAccess;
+}
+
+
+// HierarchyEntry::iterator Implementation.
+
+
+const HierarchyEntryData& HierarchyEntry::iterator::operator*()
+{
+    if ( ( pos != -1 )
+         && ( dir.is() )
+         && ( pos < names.getLength() ) )
+    {
+        try
+        {
+            OUStringBuffer aKey;
+            aKey.append( "['" );
+            makeXMLName( names.getConstArray()[ pos ], aKey );
+            aKey.append( "']" );
+
+            OUString aTitle     = aKey.makeStringAndClear();
+            OUString aTargetURL = aTitle;
+            OUString aType      = aTitle;
+
+            aTitle     += "/Title";
+            aTargetURL += "/TargetURL";
+            aType      += "/Type";
+
+            OUString aValue;
+            dir->getByHierarchicalName( aTitle ) >>= aValue;
+            entry.setTitle( aValue );
+
+            dir->getByHierarchicalName( aTargetURL ) >>= aValue;
+
+            // TargetURL property may contain a reference to the Office
+            // installation directory. To ensure a reloctable office
+            // installation, the path to the office installation directory must
+            // never be stored directly. A placeholder is used instead. Replace
+            // it by actual installation directory.
+            if ( officeDirs.is() && !aValue.isEmpty() )
+                aValue = officeDirs->makeAbsoluteURL( aValue );
+            entry.setTargetURL( aValue );
+
+            if ( dir->hasByHierarchicalName( aType ) )
+            {
+                // Might not be present since it was introduced long
+                // after Title and TargetURL (#82433#)... So not getting
+                // it is not an error.
+
+                // Get Type value.
+                sal_Int32 nType = 0;
+                if ( dir->getByHierarchicalName( aType ) >>= nType )
+                {
+                    if ( nType == 0 )
+                    {
+                        entry.setType( HierarchyEntryData::LINK );
+                    }
+                    else if ( nType == 1 )
+                    {
+                        entry.setType( HierarchyEntryData::FOLDER );
+                    }
+                    else
+                    {
+                        OSL_FAIL( "HierarchyEntry::getData - "
+                                    "Unknown Type value!" );
+                    }
+                }
+            }
+
+            entry.setName(
+                names.getConstArray()[ pos ] );
+        }
+        catch ( container::NoSuchElementException const & )
+        {
+            entry = HierarchyEntryData();
+        }
+    }
+
+    return entry;
+}
+
+} // namespace hierarchy_ucp
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchydata.hxx b/ucb/source/ucp/hierarchy/hierarchydata.hxx
new file mode 100644
index 000000000..e81364243
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchydata.hxx
@@ -0,0 +1,134 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <mutex>
+
+namespace com::sun::star {
+    namespace container {
+        class XHierarchicalNameAccess;
+    }
+    namespace util {
+        class XOfficeInstallationDirectories;
+    }
+}
+
+namespace hierarchy_ucp
+{
+
+
+class HierarchyEntryData
+{
+public:
+    enum Type { NONE, LINK, FOLDER };
+
+    HierarchyEntryData() : m_aType( NONE ) {}
+    explicit HierarchyEntryData( const Type & rType ) : m_aType( rType ) {}
+
+    const OUString & getName() const { return m_aName; }
+    void setName( const OUString & rName ) { m_aName = rName; }
+
+    const OUString & getTitle() const { return m_aTitle; }
+    void setTitle( const OUString & rTitle ) { m_aTitle = rTitle; }
+
+    const OUString & getTargetURL() const { return m_aTargetURL; }
+    void setTargetURL( const OUString & rURL ) { m_aTargetURL = rURL; }
+
+    Type getType() const
+    { return ( m_aType != NONE ) ? m_aType
+                                 : m_aTargetURL.getLength()
+                                    ? LINK
+                                    : FOLDER; }
+    void setType( const Type & rType ) { m_aType = rType; }
+
+private:
+    OUString m_aName;      // Name (language independent)
+    OUString m_aTitle;     // Title (language dependent)
+    OUString m_aTargetURL; // Target URL ( links only )
+    Type          m_aType;      // Type
+};
+
+
+class HierarchyContentProvider;
+class HierarchyUri;
+
+class HierarchyEntry
+{
+    OUString m_aServiceSpecifier;
+    OUString m_aName;
+    OUString m_aPath;
+    std::mutex m_aMutex;
+    css::uno::Reference< css::uno::XComponentContext >     m_xContext;
+    css::uno::Reference< css::lang::XMultiServiceFactory > m_xConfigProvider;
+    css::uno::Reference< css::container::XHierarchicalNameAccess >
+                                                           m_xRootReadAccess;
+    css::uno::Reference< css::util::XOfficeInstallationDirectories >
+                                                           m_xOfficeInstDirs;
+    bool m_bTriedToGetRootReadAccess;
+
+private:
+    static OUString createPathFromHierarchyURL( const HierarchyUri & rURI );
+    css::uno::Reference< css::container::XHierarchicalNameAccess >
+    getRootReadAccess();
+
+public:
+    HierarchyEntry( const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                    HierarchyContentProvider* pProvider,
+                    const OUString& rURL );
+
+    bool hasData();
+
+    bool getData( HierarchyEntryData& rData );
+
+    bool setData( const HierarchyEntryData& rData );
+
+    bool move( const OUString& rNewURL,
+                   const HierarchyEntryData& rData );
+
+    bool remove();
+
+    // Iteration.
+
+    class iterator
+    {
+    friend class HierarchyEntry;
+
+    public:
+        iterator() : pos( -1 /* before first */ ) {};
+
+        const HierarchyEntryData& operator*();
+    private:
+        HierarchyEntryData                                     entry;
+        css::uno::Reference< css::container::XHierarchicalNameAccess >   dir;
+        css::uno::Reference< css::util::XOfficeInstallationDirectories > officeDirs;
+        css::uno::Sequence< OUString>                          names;
+        sal_Int32                                              pos;
+    };
+
+    bool first( iterator& it );
+    bool next ( iterator& it );
+};
+
+} // namespace hierarchy_ucp
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchydatasource.cxx b/ucb/source/ucp/hierarchy/hierarchydatasource.cxx
new file mode 100644
index 000000000..9c5fa97ae
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchydatasource.cxx
@@ -0,0 +1,864 @@
+/* -*- 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
+ **************************************************************************
+
+ Note: Configuration Management classes do not support XAggregation.
+       So I have to wrap the interesting interfaces manually.
+
+ *************************************************************************/
+#include "hierarchydatasource.hxx"
+#include <osl/diagnose.h>
+
+#include <comphelper/propertyvalue.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <cppuhelper/weak.hxx>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/util/XChangesNotifier.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <o3tl/string_view.hxx>
+#include <ucbhelper/macros.hxx>
+#include <mutex>
+
+using namespace com::sun::star;
+using namespace hierarchy_ucp;
+
+
+// describe path of cfg entry
+constexpr OUStringLiteral CFGPROPERTY_NODEPATH = u"nodepath";
+
+constexpr OUStringLiteral READ_SERVICE_NAME = u"com.sun.star.ucb.HierarchyDataReadAccess";
+constexpr OUStringLiteral READWRITE_SERVICE_NAME = u"com.sun.star.ucb.HierarchyDataReadWriteAccess";
+
+constexpr OUStringLiteral CONFIG_DATA_ROOT_KEY =  u"/org.openoffice.ucb.Hierarchy/Root";
+
+
+namespace hcp_impl
+{
+
+
+// HierarchyDataReadAccess Implementation.
+
+namespace {
+
+class HierarchyDataAccess : public cppu::OWeakObject,
+                            public lang::XServiceInfo,
+                            public lang::XTypeProvider,
+                            public lang::XComponent,
+                            public lang::XSingleServiceFactory,
+                            public container::XHierarchicalNameAccess,
+                            public container::XNameContainer,
+                            public util::XChangesNotifier,
+                            public util::XChangesBatch
+{
+    std::mutex m_aMutex;
+    uno::Reference< uno::XInterface > m_xConfigAccess;
+    uno::Reference< lang::XComponent >                   m_xCfgC;
+    uno::Reference< lang::XSingleServiceFactory >        m_xCfgSSF;
+    uno::Reference< container::XHierarchicalNameAccess > m_xCfgHNA;
+    uno::Reference< container::XNameContainer >          m_xCfgNC;
+    uno::Reference< container::XNameReplace >            m_xCfgNR;
+    uno::Reference< container::XNameAccess >             m_xCfgNA;
+    uno::Reference< container::XElementAccess >          m_xCfgEA;
+    uno::Reference< util::XChangesNotifier >             m_xCfgCN;
+    uno::Reference< util::XChangesBatch >                m_xCfgCB;
+    bool m_bReadOnly;
+
+public:
+    HierarchyDataAccess( const uno::Reference<
+                                        uno::XInterface > & xConfigAccess,
+                         bool bReadOnly );
+
+    // 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;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XTypeProvider
+    virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId() override;
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes() override;
+
+    // XComponent
+    virtual void SAL_CALL
+    dispose() override;
+    virtual void SAL_CALL
+    addEventListener( const uno::Reference< lang::XEventListener > & xListener ) override;
+    virtual void SAL_CALL
+    removeEventListener( const uno::Reference<
+                            lang::XEventListener > & aListener ) override;
+
+    // XSingleServiceFactory
+    virtual uno::Reference< uno::XInterface > SAL_CALL
+    createInstance() override;
+    virtual uno::Reference< uno::XInterface > SAL_CALL
+    createInstanceWithArguments( const uno::Sequence< uno::Any > & aArguments ) override;
+
+    // XHierarchicalNameAccess
+    virtual uno::Any SAL_CALL
+    getByHierarchicalName( const OUString & aName ) override;
+    virtual sal_Bool SAL_CALL
+    hasByHierarchicalName( const OUString & aName ) override;
+
+    // XNameContainer
+    virtual void SAL_CALL
+    insertByName( const OUString & aName, const uno::Any & aElement ) override;
+    virtual void SAL_CALL
+    removeByName( const OUString & Name ) override;
+
+    // XNameReplace ( base of XNameContainer )
+    virtual void SAL_CALL
+    replaceByName( const OUString & aName, const uno::Any & aElement ) override;
+
+    // XNameAccess ( base of XNameReplace )
+    virtual uno::Any SAL_CALL
+    getByName( const OUString & aName ) override;
+    virtual uno::Sequence< OUString > SAL_CALL
+    getElementNames() override;
+    virtual sal_Bool SAL_CALL
+    hasByName( const OUString & aName ) override;
+
+    // XElementAccess ( base of XNameAccess )
+    virtual uno::Type SAL_CALL
+    getElementType() override;
+    virtual sal_Bool SAL_CALL
+    hasElements() override;
+
+    // XChangesNotifier
+    virtual void SAL_CALL
+    addChangesListener( const uno::Reference<
+                            util::XChangesListener > & aListener ) override;
+    virtual void SAL_CALL
+    removeChangesListener( const uno::Reference<
+                            util::XChangesListener > & aListener ) override;
+
+    // XChangesBatch
+    virtual void SAL_CALL
+    commitChanges() override;
+    virtual sal_Bool SAL_CALL
+    hasPendingChanges() override;
+    virtual uno::Sequence< util::ElementChange > SAL_CALL
+    getPendingChanges() override;
+private:
+    template<class T>
+    css::uno::Reference<T> ensureOrigInterface(css::uno::Reference<T>& x);
+};
+
+}
+
+} // namespace hcp_impl
+
+using namespace hcp_impl;
+
+
+// HierarchyDataSource Implementation.
+
+
+HierarchyDataSource::HierarchyDataSource(
+        const uno::Reference< uno::XComponentContext > & rxContext )
+: m_xContext( rxContext )
+{
+}
+
+
+// virtual
+HierarchyDataSource::~HierarchyDataSource()
+{
+}
+
+// XServiceInfo methods.
+OUString SAL_CALL HierarchyDataSource::getImplementationName()                       \
+{
+    return "com.sun.star.comp.ucb.HierarchyDataSource";
+}
+sal_Bool SAL_CALL HierarchyDataSource::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService( this, ServiceName );
+}
+css::uno::Sequence< OUString > HierarchyDataSource::getSupportedServiceNames()
+{
+    return { "com.sun.star.ucb.DefaultHierarchyDataSource", "com.sun.star.ucb.HierarchyDataSource" };
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+ucb_HierarchyDataSource_get_implementation(
+    css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new HierarchyDataSource(context));
+}
+
+
+// XComponent methods.
+
+
+// virtual
+void SAL_CALL HierarchyDataSource::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 HierarchyDataSource::addEventListener(
+                    const uno::Reference< lang::XEventListener > & Listener )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    m_aDisposeEventListeners.addInterface( aGuard, Listener );
+}
+
+
+// virtual
+void SAL_CALL HierarchyDataSource::removeEventListener(
+                    const uno::Reference< lang::XEventListener > & Listener )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    m_aDisposeEventListeners.removeInterface( aGuard, Listener );
+}
+
+
+// XMultiServiceFactory methods.
+
+
+// virtual
+uno::Reference< uno::XInterface > SAL_CALL
+HierarchyDataSource::createInstance( const OUString & aServiceSpecifier )
+{
+    // Create view to root node.
+
+    beans::PropertyValue aProp = comphelper::makePropertyValue(CFGPROPERTY_NODEPATH,
+                                                               OUString( CONFIG_DATA_ROOT_KEY  ));
+
+    uno::Sequence< uno::Any > aArguments{ uno::Any(aProp) };
+
+    return createInstanceWithArguments( aServiceSpecifier, aArguments, false );
+}
+
+
+// virtual
+uno::Reference< uno::XInterface > SAL_CALL
+HierarchyDataSource::createInstanceWithArguments(
+                                const OUString & ServiceSpecifier,
+                                const uno::Sequence< uno::Any > & Arguments )
+{
+    return createInstanceWithArguments( ServiceSpecifier, Arguments, true );
+}
+
+
+// virtual
+uno::Sequence< OUString > SAL_CALL
+HierarchyDataSource::getAvailableServiceNames()
+{
+    return { READ_SERVICE_NAME, READWRITE_SERVICE_NAME };
+}
+
+
+// Non-interface methods
+
+
+uno::Reference< uno::XInterface >
+HierarchyDataSource::createInstanceWithArguments(
+                                std::u16string_view ServiceSpecifier,
+                                const uno::Sequence< uno::Any > & Arguments,
+                                bool bCheckArgs )
+{
+    // Check service specifier.
+    bool bReadOnly  = ServiceSpecifier == READ_SERVICE_NAME;
+    bool bReadWrite = !bReadOnly && ServiceSpecifier == READWRITE_SERVICE_NAME;
+
+    if ( !bReadOnly && !bReadWrite )
+    {
+        OSL_FAIL( "HierarchyDataSource::createInstanceWithArguments - "
+                    "Unsupported service specifier!" );
+        return uno::Reference< uno::XInterface >();
+    }
+
+    uno::Sequence< uno::Any > aNewArgs( Arguments );
+    auto aNewArgsRange = asNonConstRange(aNewArgs);
+
+    if ( bCheckArgs )
+    {
+        // Check arguments.
+        bool bHasNodePath = false;
+        sal_Int32 nCount = Arguments.getLength();
+        for ( sal_Int32 n = 0; n < nCount; ++n )
+        {
+            beans::PropertyValue aProp;
+            if ( Arguments[ n ] >>= aProp )
+            {
+                if ( aProp.Name == CFGPROPERTY_NODEPATH )
+                {
+                    OUString aPath;
+                    if ( aProp.Value >>= aPath )
+                    {
+                        bHasNodePath = true;
+
+                        // Create path to data inside the configuration.
+                        OUString aConfigPath;
+                        if ( !createConfigPath( aPath, aConfigPath ) )
+                        {
+                            OSL_FAIL( "HierarchyDataSource::"
+                                "createInstanceWithArguments - "
+                                "Invalid node path!" );
+                            return uno::Reference< uno::XInterface >();
+                        }
+
+                        aProp.Value <<= aConfigPath;
+
+                        // Set new path in arguments.
+                        aNewArgsRange[ n ] <<= aProp;
+
+                        break;
+                    }
+                    else
+                    {
+                        OSL_FAIL( "HierarchyDataSource::createInstanceWithArguments - "
+                            "Invalid type for property 'nodepath'!" );
+                        return uno::Reference< uno::XInterface >();
+                    }
+                }
+            }
+        }
+
+        if ( !bHasNodePath )
+        {
+            OSL_FAIL( "HierarchyDataSource::createInstanceWithArguments - "
+                        "No 'nodepath' property!" );
+            return uno::Reference< uno::XInterface >();
+        }
+    }
+
+    // Create Configuration Provider.
+    uno::Reference< lang::XMultiServiceFactory > xProv = getConfigProvider();
+    if ( !xProv.is() )
+        return uno::Reference< uno::XInterface >();
+
+    uno::Reference< uno::XInterface > xConfigAccess;
+    try
+    {
+        if ( bReadOnly )
+        {
+            // Create configuration read-only access object.
+            xConfigAccess = xProv->createInstanceWithArguments(
+                                "com.sun.star.configuration.ConfigurationAccess",
+                                aNewArgs );
+        }
+        else
+        {
+            // Create configuration read-write access object.
+            xConfigAccess = xProv->createInstanceWithArguments(
+                                "com.sun.star.configuration.ConfigurationUpdateAccess",
+                                aNewArgs );
+        }
+    }
+    catch ( uno::Exception const & )
+    {
+        OSL_FAIL( "HierarchyDataSource::createInstanceWithArguments - "
+                    "Cannot instantiate configuration access!" );
+        throw;
+    }
+
+    if ( !xConfigAccess.is() )
+    {
+        OSL_FAIL( "HierarchyDataSource::createInstanceWithArguments - "
+                    "Cannot instantiate configuration access!" );
+        return xConfigAccess;
+    }
+
+    return uno::Reference< uno::XInterface >(
+                static_cast< cppu::OWeakObject * >(
+                    new HierarchyDataAccess( xConfigAccess, bReadOnly ) ) );
+}
+
+
+uno::Reference< lang::XMultiServiceFactory >
+HierarchyDataSource::getConfigProvider()
+{
+    if ( !m_xConfigProvider.is() )
+    {
+        std::unique_lock aGuard( m_aMutex );
+        if ( !m_xConfigProvider.is() )
+        {
+            try
+            {
+                m_xConfigProvider = configuration::theDefaultProvider::get( m_xContext );
+            }
+            catch ( uno::Exception const & )
+            {
+                OSL_FAIL( "HierarchyDataSource::getConfigProvider - "
+                               "caught exception!" );
+            }
+        }
+    }
+
+    return m_xConfigProvider;
+}
+
+
+bool HierarchyDataSource::createConfigPath(
+                std::u16string_view rInPath, OUString & rOutPath )
+{
+    if ( !rInPath.empty() )
+    {
+        if ( o3tl::starts_with( rInPath, u"/" ) )
+        {
+            OSL_FAIL( "HierarchyDataSource::createConfigPath - "
+                        "Leading slash in node path!" );
+            return false;
+        }
+
+        if ( o3tl::ends_with( rInPath, u"/" ) )
+        {
+            OSL_FAIL( "HierarchyDataSource::createConfigPath - "
+                        "Trailing slash in node path!" );
+            return false;
+        }
+
+        rOutPath = CONFIG_DATA_ROOT_KEY + "/" + rInPath;
+    }
+    else
+    {
+        rOutPath = CONFIG_DATA_ROOT_KEY;
+    }
+
+    return true;
+}
+
+
+// HierarchyDataAccess Implementation.
+
+template<class T>
+css::uno::Reference<T> HierarchyDataAccess::ensureOrigInterface(css::uno::Reference<T>& x)
+{
+    if ( x.is() )
+        return x;
+    std::scoped_lock aGuard( m_aMutex );
+    if ( !x.is() )
+       x.set( m_xConfigAccess, uno::UNO_QUERY );
+    return x;
+}
+
+
+HierarchyDataAccess::HierarchyDataAccess( const uno::Reference<
+                                            uno::XInterface > & xConfigAccess,
+                                          bool bReadOnly )
+: m_xConfigAccess( xConfigAccess ),
+  m_bReadOnly( bReadOnly )
+{
+}
+
+// XInterface methods.
+void SAL_CALL HierarchyDataAccess::acquire()
+    noexcept
+{
+    OWeakObject::acquire();
+}
+
+void SAL_CALL HierarchyDataAccess::release()
+    noexcept
+{
+    OWeakObject::release();
+}
+
+// virtual
+uno::Any SAL_CALL HierarchyDataAccess::queryInterface( const uno::Type & aType )
+{
+    // Interfaces supported in read-only and read-write mode.
+    uno::Any aRet = cppu::queryInterface( aType,
+                static_cast< lang::XTypeProvider * >( this ),
+                static_cast< lang::XServiceInfo * >( this ),
+                static_cast< lang::XComponent * >( this ),
+                static_cast< container::XHierarchicalNameAccess * >( this ),
+                static_cast< container::XNameAccess * >( this ),
+                static_cast< container::XElementAccess * >( this ),
+                static_cast< util::XChangesNotifier * >( this ) );
+
+    // Interfaces supported only in read-write mode.
+    if ( !aRet.hasValue() && !m_bReadOnly )
+    {
+        aRet = cppu::queryInterface( aType,
+                static_cast< lang::XSingleServiceFactory * >( this ),
+                static_cast< container::XNameContainer * >( this ),
+                static_cast< container::XNameReplace * >( this ),
+                static_cast< util::XChangesBatch * >( this ) );
+    }
+
+    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( aType );
+}
+
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_COMMON_IMPL( HierarchyDataAccess );
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL HierarchyDataAccess::getTypes()
+{
+    if ( m_bReadOnly )
+    {
+        static cppu::OTypeCollection s_aReadOnlyTypes(
+                    CPPU_TYPE_REF( lang::XTypeProvider ),
+                    CPPU_TYPE_REF( lang::XServiceInfo ),
+                    CPPU_TYPE_REF( lang::XComponent ),
+                    CPPU_TYPE_REF( container::XHierarchicalNameAccess ),
+                    CPPU_TYPE_REF( container::XNameAccess ),
+                    CPPU_TYPE_REF( util::XChangesNotifier ) );
+
+        return s_aReadOnlyTypes.getTypes();
+    }
+    else
+    {
+        static cppu::OTypeCollection s_aReadWriteTypes(
+                    CPPU_TYPE_REF( lang::XTypeProvider ),
+                    CPPU_TYPE_REF( lang::XServiceInfo ),
+                    CPPU_TYPE_REF( lang::XComponent ),
+                    CPPU_TYPE_REF( lang::XSingleServiceFactory ),
+                    CPPU_TYPE_REF( container::XHierarchicalNameAccess ),
+                    CPPU_TYPE_REF( container::XNameContainer ),
+                    CPPU_TYPE_REF( util::XChangesBatch ),
+                    CPPU_TYPE_REF( util::XChangesNotifier ) );
+
+        return s_aReadWriteTypes.getTypes();
+    }
+}
+
+
+// XServiceInfo methods.
+
+OUString SAL_CALL HierarchyDataAccess::getImplementationName()
+{
+    return "com.sun.star.comp.ucb.HierarchyDataAccess";
+}
+
+sal_Bool SAL_CALL HierarchyDataAccess::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService( this, ServiceName );
+}
+
+css::uno::Sequence< OUString > SAL_CALL HierarchyDataAccess::getSupportedServiceNames()
+{
+    return { READ_SERVICE_NAME, READWRITE_SERVICE_NAME };
+}
+
+
+// XComponent methods.
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::dispose()
+{
+    uno::Reference< lang::XComponent > xOrig
+        = ensureOrigInterface( m_xCfgC );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XComponent!" );
+    xOrig->dispose();
+}
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::addEventListener(
+                    const uno::Reference< lang::XEventListener > & xListener )
+{
+    uno::Reference< lang::XComponent > xOrig
+        = ensureOrigInterface( m_xCfgC );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XComponent!" );
+    xOrig->addEventListener( xListener );
+}
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::removeEventListener(
+                    const uno::Reference< lang::XEventListener > & aListener )
+{
+    uno::Reference< lang::XComponent > xOrig
+        = ensureOrigInterface( m_xCfgC );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XComponent!" );
+    xOrig->removeEventListener( aListener );
+}
+
+
+// XHierarchicalNameAccess methods.
+
+
+// virtual
+uno::Any SAL_CALL HierarchyDataAccess::getByHierarchicalName(
+                                                const OUString & aName )
+{
+    uno::Reference< container::XHierarchicalNameAccess > xOrig
+        = ensureOrigInterface( m_xCfgHNA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : "
+                "Data source is not an XHierarchicalNameAccess!" );
+    return xOrig->getByHierarchicalName( aName );
+}
+
+
+// virtual
+sal_Bool SAL_CALL HierarchyDataAccess::hasByHierarchicalName(
+                                                const OUString & aName )
+{
+    uno::Reference< container::XHierarchicalNameAccess > xOrig
+        = ensureOrigInterface( m_xCfgHNA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : "
+                "Data source is not an XHierarchicalNameAccess!" );
+    return xOrig->hasByHierarchicalName( aName );
+}
+
+
+// XNameAccess methods.
+
+
+// virtual
+uno::Any SAL_CALL HierarchyDataAccess::getByName( const OUString & aName )
+{
+    uno::Reference< container::XNameAccess > xOrig
+        = ensureOrigInterface( m_xCfgNA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XNameAccess!" );
+    return xOrig->getByName( aName );
+}
+
+
+// virtual
+uno::Sequence< OUString > SAL_CALL HierarchyDataAccess::getElementNames()
+{
+    uno::Reference< container::XNameAccess > xOrig
+        = ensureOrigInterface( m_xCfgNA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XNameAccess!" );
+    return xOrig->getElementNames();
+}
+
+
+// virtual
+sal_Bool SAL_CALL HierarchyDataAccess::hasByName( const OUString & aName )
+{
+    uno::Reference< container::XNameAccess > xOrig
+        = ensureOrigInterface( m_xCfgNA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XNameAccess!" );
+    return xOrig->hasByName( aName );
+}
+
+
+// XElementAccess methods.
+
+
+// virtual
+uno::Type SAL_CALL HierarchyDataAccess::getElementType()
+{
+    uno::Reference< container::XElementAccess > xOrig
+        = ensureOrigInterface( m_xCfgEA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XElementAccess!" );
+    return xOrig->getElementType();
+}
+
+
+// virtual
+sal_Bool SAL_CALL HierarchyDataAccess::hasElements()
+{
+    uno::Reference< container::XElementAccess > xOrig
+        = ensureOrigInterface( m_xCfgEA );
+
+    OSL_ENSURE( xOrig.is(),
+                "HierarchyDataAccess : Data source is not an XElementAccess!" );
+    return xOrig->hasElements();
+}
+
+
+// XChangesNotifier methods.
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::addChangesListener(
+                const uno::Reference< util::XChangesListener > & aListener )
+{
+    uno::Reference< util::XChangesNotifier > xOrig
+        = ensureOrigInterface( m_xCfgCN );
+
+    OSL_ENSURE( xOrig.is(),
+            "HierarchyDataAccess : Data source is not an XChangesNotifier!" );
+    xOrig->addChangesListener( aListener );
+}
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::removeChangesListener(
+                const uno::Reference< util::XChangesListener > & aListener )
+{
+    uno::Reference< util::XChangesNotifier > xOrig
+        = ensureOrigInterface( m_xCfgCN );
+
+    OSL_ENSURE( xOrig.is(),
+            "HierarchyDataAccess : Data source is not an XChangesNotifier!" );
+    xOrig->removeChangesListener( aListener );
+}
+
+
+// XSingleServiceFactory methods.
+
+
+// virtual
+uno::Reference< uno::XInterface > SAL_CALL HierarchyDataAccess::createInstance()
+{
+    uno::Reference< lang::XSingleServiceFactory > xOrig
+        = ensureOrigInterface( m_xCfgSSF );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XSingleServiceFactory!" );
+    return xOrig->createInstance();
+}
+
+
+// virtual
+uno::Reference< uno::XInterface > SAL_CALL
+HierarchyDataAccess::createInstanceWithArguments(
+                            const uno::Sequence< uno::Any > & aArguments )
+{
+    uno::Reference< lang::XSingleServiceFactory > xOrig
+        = ensureOrigInterface( m_xCfgSSF );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XSingleServiceFactory!" );
+    return xOrig->createInstanceWithArguments( aArguments );
+}
+
+
+// XNameContainer methods.
+
+
+// virtual
+void SAL_CALL
+HierarchyDataAccess::insertByName( const OUString & aName,
+                                   const uno::Any & aElement )
+{
+    uno::Reference< container::XNameContainer > xOrig
+        = ensureOrigInterface( m_xCfgNC );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XNameContainer!" );
+    xOrig->insertByName( aName, aElement );
+}
+
+
+// virtual
+void SAL_CALL
+HierarchyDataAccess::removeByName( const OUString & Name )
+{
+    uno::Reference< container::XNameContainer > xOrig
+        = ensureOrigInterface( m_xCfgNC );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XNameContainer!" );
+    xOrig->removeByName( Name );
+}
+
+
+// XNameReplace methods.
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::replaceByName( const OUString & aName,
+                                                  const uno::Any & aElement )
+{
+    uno::Reference< container::XNameReplace > xOrig
+        = ensureOrigInterface( m_xCfgNR );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XNameReplace!" );
+    xOrig->replaceByName( aName, aElement );
+}
+
+
+// XChangesBatch methods.
+
+
+// virtual
+void SAL_CALL HierarchyDataAccess::commitChanges()
+{
+    uno::Reference< util::XChangesBatch > xOrig
+        = ensureOrigInterface( m_xCfgCB );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XChangesBatch!" );
+    xOrig->commitChanges();
+}
+
+
+// virtual
+sal_Bool SAL_CALL HierarchyDataAccess::hasPendingChanges()
+{
+    uno::Reference< util::XChangesBatch > xOrig
+        = ensureOrigInterface( m_xCfgCB );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XChangesBatch!" );
+    return xOrig->hasPendingChanges();
+}
+
+
+// virtual
+uno::Sequence< util::ElementChange > SAL_CALL
+HierarchyDataAccess::getPendingChanges()
+{
+    uno::Reference< util::XChangesBatch > xOrig
+        = ensureOrigInterface( m_xCfgCB );
+
+    OSL_ENSURE( xOrig.is(),
+        "HierarchyDataAccess : Data source is not an XChangesBatch!" );
+    return xOrig->getPendingChanges();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchydatasource.hxx b/ucb/source/ucp/hierarchy/hierarchydatasource.hxx
new file mode 100644
index 000000000..b4bff294d
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchydatasource.hxx
@@ -0,0 +1,83 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <comphelper/interfacecontainer4.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <memory>
+#include <mutex>
+#include <string_view>
+
+
+namespace hierarchy_ucp {
+
+
+class HierarchyDataSource : public cppu::WeakImplHelper<
+                                css::lang::XServiceInfo,
+                                css::lang::XComponent,
+                                css::lang::XMultiServiceFactory>
+{
+    std::mutex m_aMutex;
+    css::uno::Reference< css::uno::XComponentContext >     m_xContext;
+    css::uno::Reference< css::lang::XMultiServiceFactory >  m_xConfigProvider;
+    comphelper::OInterfaceContainerHelper4<css::lang::XEventListener> m_aDisposeEventListeners;
+
+public:
+    explicit HierarchyDataSource( const css::uno::Reference< css::uno::XComponentContext > & rxContext );
+    virtual ~HierarchyDataSource() override;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL addEventListener( const css::uno::Reference< css::lang::XEventListener > & xListener ) override;
+    virtual void SAL_CALL removeEventListener( const css::uno::Reference< css::lang::XEventListener > & aListener ) override;
+
+    // XMultiServiceFactory
+    virtual css::uno::Reference< css::uno::XInterface > SAL_CALL createInstance( const OUString & aServiceSpecifier ) override;
+    virtual css::uno::Reference< css::uno::XInterface > SAL_CALL createInstanceWithArguments( const OUString & ServiceSpecifier,
+                                 const css::uno::Sequence<
+                                    css::uno::Any > & Arguments ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getAvailableServiceNames() override;
+
+    // Non-Interface methods
+
+private:
+    /// @throws css::uno::Exception
+    css::uno::Reference< css::uno::XInterface > createInstanceWithArguments( std::u16string_view ServiceSpecifier,
+                                 const css::uno::Sequence<
+                                    css::uno::Any > & Arguments,
+                                 bool bCheckArgs );
+
+    css::uno::Reference< css::lang::XMultiServiceFactory > getConfigProvider();
+
+    static bool createConfigPath( std::u16string_view rInPath, OUString & rOutPath );
+};
+
+} // namespace hierarchy_ucp
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchydatasupplier.cxx b/ucb/source/ucp/hierarchy/hierarchydatasupplier.cxx
new file mode 100644
index 000000000..1a2f29f6b
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchydatasupplier.cxx
@@ -0,0 +1,369 @@
+/* -*- 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/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/ucb/OpenMode.hpp>
+#include <ucbhelper/contentidentifier.hxx>
+#include "hierarchydatasupplier.hxx"
+#include "hierarchyprovider.hxx"
+#include "hierarchycontent.hxx"
+
+using namespace com::sun::star;
+using namespace hierarchy_ucp;
+
+
+
+HierarchyResultSetDataSupplier::HierarchyResultSetDataSupplier(
+                const uno::Reference< uno::XComponentContext >& rxContext,
+                const rtl::Reference< HierarchyContent >& rContent,
+                sal_Int32 nOpenMode )
+: m_xContent( rContent ), m_xContext( rxContext ),
+  m_aFolder( rxContext,
+             static_cast< HierarchyContentProvider * >(
+                 rContent->getProvider().get() ),
+             rContent->getIdentifier()->getContentIdentifier() ),
+  m_nOpenMode( nOpenMode ), m_bCountFinal( false )
+{
+}
+
+
+// virtual
+HierarchyResultSetDataSupplier::~HierarchyResultSetDataSupplier()
+{
+}
+
+
+// virtual
+OUString HierarchyResultSetDataSupplier::queryContentIdentifierString(
+                                                        sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+    return queryContentIdentifierStringImpl(aGuard, nIndex);
+}
+
+OUString HierarchyResultSetDataSupplier::queryContentIdentifierStringImpl(
+                                            std::unique_lock<std::mutex>& rGuard,
+                                            sal_uInt32 nIndex )
+{
+    if ( nIndex < m_aResults.size() )
+    {
+        OUString aId = m_aResults[ nIndex ]->aId;
+        if ( !aId.isEmpty() )
+        {
+            // Already cached.
+            return aId;
+        }
+    }
+
+    if ( getResultImpl( rGuard, nIndex ) )
+    {
+        OUString aId
+            = m_xContent->getIdentifier()->getContentIdentifier();
+
+        if ( ( aId.lastIndexOf( '/' ) + 1 ) != aId.getLength() )
+            aId += "/";
+
+        aId += m_aResults[ nIndex ]->aData.getName();
+
+        m_aResults[ nIndex ]->aId = aId;
+        return aId;
+    }
+    return OUString();
+}
+
+
+// virtual
+uno::Reference< ucb::XContentIdentifier >
+HierarchyResultSetDataSupplier::queryContentIdentifier( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( nIndex < m_aResults.size() )
+    {
+        uno::Reference< ucb::XContentIdentifier > xId
+                                = m_aResults[ nIndex ]->xId;
+        if ( xId.is() )
+        {
+            // Already cached.
+            return xId;
+        }
+    }
+
+    OUString aId = queryContentIdentifierStringImpl( aGuard, nIndex );
+    if ( !aId.isEmpty() )
+    {
+        uno::Reference< ucb::XContentIdentifier > xId
+            = new ::ucbhelper::ContentIdentifier( aId );
+        m_aResults[ nIndex ]->xId = xId;
+        return xId;
+    }
+    return uno::Reference< ucb::XContentIdentifier >();
+}
+
+
+// virtual
+uno::Reference< ucb::XContent >
+HierarchyResultSetDataSupplier::queryContent( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( nIndex < m_aResults.size() )
+    {
+        uno::Reference< ucb::XContent > xContent
+                                = m_aResults[ nIndex ]->xContent;
+        if ( xContent.is() )
+        {
+            // Already cached.
+            return xContent;
+        }
+    }
+
+    uno::Reference< ucb::XContentIdentifier > xId
+        = queryContentIdentifier( nIndex );
+    if ( xId.is() )
+    {
+        try
+        {
+            uno::Reference< ucb::XContent > xContent
+                = m_xContent->getProvider()->queryContent( xId );
+            m_aResults[ nIndex ]->xContent = xContent;
+            return xContent;
+
+        }
+        catch ( ucb::IllegalIdentifierException const & )
+        {
+        }
+    }
+    return uno::Reference< ucb::XContent >();
+}
+
+
+// virtual
+bool HierarchyResultSetDataSupplier::getResult( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+    return getResultImpl(aGuard, nIndex);
+}
+
+bool HierarchyResultSetDataSupplier::getResultImpl( std::unique_lock<std::mutex>& rGuard, sal_uInt32 nIndex )
+{
+    if ( m_aResults.size() > nIndex )
+    {
+        // Result already present.
+        return true;
+    }
+
+    // Result not (yet) present.
+
+    if ( m_bCountFinal )
+        return false;
+
+    // Try to obtain result...
+
+    sal_uInt32 nOldCount = m_aResults.size();
+    bool bFound = false;
+    sal_uInt32 nPos = nOldCount;
+
+    while ( m_aFolder.next( m_aIterator ) )
+    {
+        const HierarchyEntryData& rResult = *m_aIterator;
+        if ( checkResult( rResult ) )
+        {
+            m_aResults.emplace_back( new ResultListEntry( rResult ) );
+
+            if ( nPos == nIndex )
+            {
+                // Result obtained.
+                bFound = true;
+                break;
+            }
+        }
+        nPos++;
+    }
+
+    if ( !bFound )
+        m_bCountFinal = true;
+
+    rtl::Reference< ::ucbhelper::ResultSet > xResultSet = getResultSet();
+    if ( xResultSet.is() )
+    {
+        // Callbacks follow!
+        rGuard.unlock();
+
+        if ( nOldCount < m_aResults.size() )
+            xResultSet->rowCountChanged(
+                                    nOldCount, m_aResults.size() );
+
+        if ( m_bCountFinal )
+            xResultSet->rowCountFinal();
+
+        rGuard.lock();
+    }
+
+    return bFound;
+}
+
+
+// virtual
+sal_uInt32 HierarchyResultSetDataSupplier::totalCount()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( m_bCountFinal )
+        return m_aResults.size();
+
+    sal_uInt32 nOldCount = m_aResults.size();
+
+    while ( m_aFolder.next( m_aIterator ) )
+    {
+        const HierarchyEntryData& rResult = *m_aIterator;
+        if ( checkResult( rResult ) )
+            m_aResults.emplace_back( new ResultListEntry( rResult ) );
+    }
+
+    m_bCountFinal = true;
+
+    rtl::Reference< ::ucbhelper::ResultSet > xResultSet = getResultSet();
+    if ( xResultSet.is() )
+    {
+        // Callbacks follow!
+        aGuard.unlock();
+
+        if ( nOldCount < m_aResults.size() )
+            xResultSet->rowCountChanged(
+                                    nOldCount, m_aResults.size() );
+
+        xResultSet->rowCountFinal();
+    }
+
+    return m_aResults.size();
+}
+
+
+// virtual
+sal_uInt32 HierarchyResultSetDataSupplier::currentCount()
+{
+    return m_aResults.size();
+}
+
+
+// virtual
+bool HierarchyResultSetDataSupplier::isCountFinal()
+{
+    return m_bCountFinal;
+}
+
+
+// virtual
+uno::Reference< sdbc::XRow >
+HierarchyResultSetDataSupplier::queryPropertyValues( sal_uInt32 nIndex  )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( nIndex < m_aResults.size() )
+    {
+        uno::Reference< sdbc::XRow > xRow
+            = m_aResults[ nIndex ]->xRow;
+        if ( xRow.is() )
+        {
+            // Already cached.
+            return xRow;
+        }
+    }
+
+    if ( getResultImpl( aGuard, nIndex ) )
+    {
+        HierarchyContentProperties aData(
+            m_aResults[ nIndex ]->aData );
+
+        uno::Reference< sdbc::XRow > xRow
+            = HierarchyContent::getPropertyValues(
+                m_xContext,
+                getResultSet()->getProperties(),
+                aData,
+                static_cast< HierarchyContentProvider * >(
+                    m_xContent->getProvider().get() ),
+                queryContentIdentifierStringImpl( aGuard, nIndex ) );
+        m_aResults[ nIndex ]->xRow = xRow;
+        return xRow;
+    }
+
+    return uno::Reference< sdbc::XRow >();
+}
+
+
+// virtual
+void HierarchyResultSetDataSupplier::releasePropertyValues( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( nIndex < m_aResults.size() )
+        m_aResults[ nIndex ]->xRow.clear();
+}
+
+
+// virtual
+void HierarchyResultSetDataSupplier::close()
+{
+}
+
+
+// virtual
+void HierarchyResultSetDataSupplier::validate()
+{
+}
+
+
+bool HierarchyResultSetDataSupplier::checkResult(
+                                    const HierarchyEntryData& rResult )
+{
+    switch ( m_nOpenMode )
+    {
+        case ucb::OpenMode::FOLDERS:
+            if ( rResult.getType() == HierarchyEntryData::LINK )
+            {
+                // Entry is a link.
+                return false;
+            }
+            break;
+
+        case ucb::OpenMode::DOCUMENTS:
+            if ( rResult.getType() == HierarchyEntryData::FOLDER )
+            {
+                // Entry is a folder.
+                return false;
+            }
+            break;
+
+        case ucb::OpenMode::ALL:
+        default:
+            break;
+    }
+
+    return true;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchydatasupplier.hxx b/ucb/source/ucp/hierarchy/hierarchydatasupplier.hxx
new file mode 100644
index 000000000..8bad51dc0
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchydatasupplier.hxx
@@ -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 .
+ */
+
+#pragma once
+
+#include <rtl/ref.hxx>
+#include <ucbhelper/resultset.hxx>
+#include <mutex>
+#include <vector>
+#include "hierarchydata.hxx"
+
+namespace hierarchy_ucp {
+
+class HierarchyEntryData;
+class HierarchyContent;
+
+class HierarchyResultSetDataSupplier :
+        public ::ucbhelper::ResultSetDataSupplier
+{
+private:
+    bool checkResult( const HierarchyEntryData& rResult );
+
+public:
+    HierarchyResultSetDataSupplier(
+                    const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                    const rtl::Reference< HierarchyContent >& rContent,
+                    sal_Int32 nOpenMode );
+    virtual ~HierarchyResultSetDataSupplier() override;
+
+    virtual OUString queryContentIdentifierString( sal_uInt32 nIndex ) final override;
+    virtual css::uno::Reference< css::ucb::XContentIdentifier >
+    queryContentIdentifier( sal_uInt32 nIndex ) override;
+    virtual css::uno::Reference< css::ucb::XContent >
+    queryContent( sal_uInt32 nIndex ) override;
+
+    virtual bool getResult( sal_uInt32 nIndex ) final override;
+
+    virtual sal_uInt32 totalCount() override;
+    virtual sal_uInt32 currentCount() override;
+    virtual bool isCountFinal() override;
+
+    virtual css::uno::Reference< css::sdbc::XRow >
+    queryPropertyValues( sal_uInt32 nIndex  ) override;
+    virtual void releasePropertyValues( sal_uInt32 nIndex ) override;
+
+    virtual void close() override;
+
+    virtual void validate() override;
+private:
+    OUString queryContentIdentifierStringImpl( std::unique_lock<std::mutex>&, sal_uInt32 nIndex );
+    bool getResultImpl( std::unique_lock<std::mutex>&, sal_uInt32 nIndex );
+
+    struct ResultListEntry
+    {
+        OUString                             aId;
+        css::uno::Reference< css::ucb::XContentIdentifier > xId;
+        css::uno::Reference< css::ucb::XContent >           xContent;
+        css::uno::Reference< css::sdbc::XRow >              xRow;
+        HierarchyEntryData                        aData;
+
+        explicit ResultListEntry( const HierarchyEntryData& rEntry ) : aData( rEntry ) {}
+    };
+    typedef std::vector< std::unique_ptr<ResultListEntry> > ResultList;
+    std::mutex                                      m_aMutex;
+    ResultList                                      m_aResults;
+    rtl::Reference< HierarchyContent >              m_xContent;
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+    HierarchyEntry                                  m_aFolder;
+    HierarchyEntry::iterator                        m_aIterator;
+    sal_Int32                                       m_nOpenMode;
+    bool                                            m_bCountFinal;
+};
+
+} // namespace hierarchy_ucp
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchyprovider.cxx b/ucb/source/ucp/hierarchy/hierarchyprovider.cxx
new file mode 100644
index 000000000..09ac0a2e7
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchyprovider.cxx
@@ -0,0 +1,280 @@
+/* -*- 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
+ **************************************************************************
+
+ - XInitialization::initialize does not work any longer!
+
+ *************************************************************************/
+#include <osl/diagnose.h>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/util/theOfficeInstallationDirectories.hpp>
+#include <cppuhelper/queryinterface.hxx>
+#include <cppuhelper/weak.hxx>
+#include <ucbhelper/contentidentifier.hxx>
+#include <ucbhelper/macros.hxx>
+#include "hierarchyprovider.hxx"
+#include "hierarchycontent.hxx"
+#include "hierarchyuri.hxx"
+
+#include "../inc/urihelper.hxx"
+
+using namespace com::sun::star;
+using namespace hierarchy_ucp;
+
+
+// HierarchyContentProvider Implementation.
+
+
+HierarchyContentProvider::HierarchyContentProvider(
+            const uno::Reference< uno::XComponentContext >& rxContext )
+: ::ucbhelper::ContentProviderImplHelper( rxContext )
+{
+}
+
+
+// virtual
+HierarchyContentProvider::~HierarchyContentProvider()
+{
+}
+
+
+// XInterface methods.
+
+void SAL_CALL HierarchyContentProvider::acquire()
+    noexcept
+{
+    OWeakObject::acquire();
+}
+
+void SAL_CALL HierarchyContentProvider::release()
+    noexcept
+{
+    OWeakObject::release();
+}
+
+css::uno::Any SAL_CALL HierarchyContentProvider::queryInterface( const css::uno::Type & rType )
+{
+    css::uno::Any aRet = cppu::queryInterface( rType,
+                                               static_cast< lang::XTypeProvider* >(this),
+                                               static_cast< lang::XServiceInfo* >(this),
+                                               static_cast< ucb::XContentProvider* >(this),
+                                               static_cast< lang::XInitialization* >(this)
+                                               );
+    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
+}
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_IMPL_4( HierarchyContentProvider,
+                      lang::XTypeProvider,
+                      lang::XServiceInfo,
+                      ucb::XContentProvider,
+                      lang::XInitialization );
+
+
+// XServiceInfo methods.
+
+OUString SAL_CALL HierarchyContentProvider::getImplementationName()                       \
+{
+    return "com.sun.star.comp.ucb.HierarchyContentProvider";
+}
+sal_Bool SAL_CALL HierarchyContentProvider::supportsService( const OUString& ServiceName )
+{
+    return cppu::supportsService( this, ServiceName );
+}
+css::uno::Sequence< OUString > HierarchyContentProvider::getSupportedServiceNames()
+{
+    return { "com.sun.star.ucb.HierarchyContentProvider" };
+}
+
+// Service factory implementation.
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+ucb_HierarchyContentProvider_get_implementation(
+    css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new HierarchyContentProvider(context));
+}
+
+// XContentProvider methods.
+
+
+// virtual
+uno::Reference< ucb::XContent > SAL_CALL
+HierarchyContentProvider::queryContent(
+        const uno::Reference< ucb::XContentIdentifier >& Identifier )
+{
+    HierarchyUri aUri( Identifier->getContentIdentifier() );
+    if ( !aUri.isValid() )
+        throw ucb::IllegalIdentifierException();
+
+    // Encode URL and create new Id. This may "correct" user-typed-in URL's.
+    uno::Reference< ucb::XContentIdentifier > xCanonicId
+        = new ::ucbhelper::ContentIdentifier( ::ucb_impl::urihelper::encodeURI( aUri.getUri() ) );
+    osl::MutexGuard aGuard( m_aMutex );
+
+    // Check, if a content with given id already exists...
+    uno::Reference< ucb::XContent > xContent
+        = queryExistingContent( xCanonicId );
+    if ( xContent.is() )
+        return xContent;
+
+    // Create a new content.
+    xContent = HierarchyContent::create( m_xContext, this, xCanonicId );
+    registerNewContent( xContent );
+
+    if ( xContent.is() && !xContent->getIdentifier().is() )
+        throw ucb::IllegalIdentifierException();
+
+    return xContent;
+}
+
+
+// XInitialization methods.
+
+
+// virtual
+void SAL_CALL HierarchyContentProvider::initialize(
+                                const uno::Sequence< uno::Any >& aArguments )
+{
+    if ( aArguments.hasElements() )
+        OSL_FAIL( "HierarchyContentProvider::initialize : not supported!" );
+}
+
+
+//  Non-interface methods.
+
+
+uno::Reference< lang::XMultiServiceFactory >
+HierarchyContentProvider::getConfigProvider(
+                                const OUString & rServiceSpecifier )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+    ConfigProviderMap::iterator it = m_aConfigProviderMap.find(
+                                                    rServiceSpecifier );
+    if ( it == m_aConfigProviderMap.end() )
+    {
+        try
+        {
+            ConfigProviderMapEntry aEntry;
+            aEntry.xConfigProvider.set(
+                                m_xContext->getServiceManager()->createInstanceWithContext(rServiceSpecifier, m_xContext),
+                                uno::UNO_QUERY );
+
+            if ( aEntry.xConfigProvider.is() )
+            {
+                m_aConfigProviderMap[ rServiceSpecifier ] = aEntry;
+                return aEntry.xConfigProvider;
+            }
+        }
+        catch ( uno::Exception const & )
+        {
+//            OSL_FAIL( //                        "HierarchyContentProvider::getConfigProvider - "
+//                        "caught exception!" );
+        }
+
+        OSL_FAIL( "HierarchyContentProvider::getConfigProvider - "
+                    "No config provider!" );
+
+        return uno::Reference< lang::XMultiServiceFactory >();
+    }
+
+    return (*it).second.xConfigProvider;
+}
+
+uno::Reference< container::XHierarchicalNameAccess >
+HierarchyContentProvider::getRootConfigReadNameAccess(
+                                const OUString & rServiceSpecifier )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+    ConfigProviderMap::iterator it = m_aConfigProviderMap.find(
+                                                    rServiceSpecifier );
+    if (it == m_aConfigProviderMap.end())
+        return uno::Reference< container::XHierarchicalNameAccess >();
+
+    if ( !( (*it).second.xRootReadAccess.is() ) )
+    {
+        if ( (*it).second.bTriedToGetRootReadAccess )
+        {
+            OSL_FAIL( "HierarchyContentProvider::getRootConfigReadNameAccess - "
+                "Unable to read any config data! -> #82494#" );
+            return uno::Reference< container::XHierarchicalNameAccess >();
+        }
+
+        try
+        {
+            uno::Reference< lang::XMultiServiceFactory > xConfigProv
+                = getConfigProvider( rServiceSpecifier );
+
+            if ( xConfigProv.is() )
+            {
+                beans::PropertyValue      aProperty;
+                aProperty.Name = "nodepath" ;
+                aProperty.Value <<= OUString(); // root path
+                uno::Sequence< uno::Any > aArguments{ uno::Any(aProperty) };
+
+                (*it).second.bTriedToGetRootReadAccess = true;
+
+                (*it).second.xRootReadAccess.set(
+                        xConfigProv->createInstanceWithArguments(
+                            "com.sun.star.ucb.HierarchyDataReadAccess",
+                            aArguments ),
+                        uno::UNO_QUERY );
+            }
+        }
+        catch ( uno::RuntimeException const & )
+        {
+            throw;
+        }
+        catch ( uno::Exception const & )
+        {
+            // createInstance, createInstanceWithArguments
+
+            OSL_FAIL( "HierarchyContentProvider::getRootConfigReadNameAccess - "
+                "caught Exception!" );
+        }
+    }
+
+    return (*it).second.xRootReadAccess;
+}
+
+uno::Reference< util::XOfficeInstallationDirectories >
+HierarchyContentProvider::getOfficeInstallationDirectories()
+{
+    if ( !m_xOfficeInstDirs.is() )
+    {
+        osl::MutexGuard aGuard( m_aMutex );
+        if ( !m_xOfficeInstDirs.is() )
+        {
+            OSL_ENSURE( m_xContext.is(), "No service manager!" );
+
+            m_xOfficeInstDirs = util::theOfficeInstallationDirectories::get(m_xContext);
+        }
+    }
+    return m_xOfficeInstDirs;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchyprovider.hxx b/ucb/source/ucp/hierarchy/hierarchyprovider.hxx
new file mode 100644
index 000000000..cbd2911d4
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchyprovider.hxx
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <ucbhelper/providerhelper.hxx>
+#include <com/sun/star/lang/XInitialization.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <unordered_map>
+
+namespace com::sun::star {
+    namespace container {
+        class XHierarchicalNameAccess;
+    }
+    namespace util {
+        class XOfficeInstallationDirectories;
+    }
+}
+
+namespace hierarchy_ucp {
+
+
+#define HIERARCHY_URL_SCHEME \
+                "vnd.sun.star.hier"
+#define HIERARCHY_URL_SCHEME_LENGTH 17
+
+inline constexpr OUStringLiteral HIERARCHY_FOLDER_CONTENT_TYPE =
+                u"application/" HIERARCHY_URL_SCHEME "-folder";
+inline constexpr OUStringLiteral HIERARCHY_LINK_CONTENT_TYPE =
+                u"application/" HIERARCHY_URL_SCHEME "-link";
+
+struct ConfigProviderMapEntry
+{
+    css::uno::Reference< css::lang::XMultiServiceFactory > xConfigProvider;
+    css::uno::Reference< css::container::XHierarchicalNameAccess > xRootReadAccess;
+    bool bTriedToGetRootReadAccess;
+
+    ConfigProviderMapEntry() : bTriedToGetRootReadAccess( false ) {}
+};
+
+typedef std::unordered_map
+<
+    OUString,  // service specifier
+    ConfigProviderMapEntry
+>
+ConfigProviderMap;
+
+class HierarchyContentProvider : public ::ucbhelper::ContentProviderImplHelper,
+                                 public css::lang::XInitialization
+{
+    ConfigProviderMap   m_aConfigProviderMap;
+    css::uno::Reference< css::util::XOfficeInstallationDirectories > m_xOfficeInstDirs;
+
+public:
+    explicit HierarchyContentProvider(
+                const css::uno::Reference< css::uno::XComponentContext >& rxContext );
+    virtual ~HierarchyContentProvider() override;
+
+    // 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;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    // XContentProvider
+    virtual css::uno::Reference< css::ucb::XContent > SAL_CALL
+    queryContent( const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier ) override;
+
+    // XInitialization
+    virtual void SAL_CALL
+    initialize( const css::uno::Sequence< css::uno::Any >& aArguments ) override;
+
+    // Non-Interface methods
+    css::uno::Reference< css::lang::XMultiServiceFactory >
+    getConfigProvider( const OUString & rServiceSpecifier );
+    css::uno::Reference< css::container::XHierarchicalNameAccess >
+    getRootConfigReadNameAccess( const OUString & rServiceSpecifier );
+
+    // Note: may return an empty reference.
+    css::uno::Reference< css::util::XOfficeInstallationDirectories >
+    getOfficeInstallationDirectories();
+};
+
+} // namespace hierarchy_ucp
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchyuri.cxx b/ucb/source/ucp/hierarchy/hierarchyuri.cxx
new file mode 100644
index 000000000..618a64022
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchyuri.cxx
@@ -0,0 +1,178 @@
+/* -*- 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 "hierarchyuri.hxx"
+
+using namespace hierarchy_ucp;
+
+constexpr OUStringLiteral HIERARCHY_URL_SCHEME = u"vnd.sun.star.hier";
+constexpr OUStringLiteral DEFAULT_DATA_SOURCE_SERVICE =
+                    u"com.sun.star.ucb.DefaultHierarchyDataSource";
+
+
+// HierarchyUri Implementation.
+
+
+void HierarchyUri::init() const
+{
+    // Already inited?
+    if ( m_aUri.isEmpty() || !m_aPath.isEmpty() )
+        return;
+
+    // Note: Maybe it's a re-init, setUri only resets m_aPath!
+    m_aService.clear();
+    m_aParentUri.clear();
+
+    // URI must match at least: <scheme>:
+    if ( m_aUri.getLength() < HIERARCHY_URL_SCHEME.getLength() + 1 )
+    {
+        // error, but remember that we did an init().
+        m_aPath = "/";
+        return;
+    }
+
+    // Scheme is case insensitive.
+    OUString aScheme
+        = m_aUri.copy( 0, HIERARCHY_URL_SCHEME.getLength() ).toAsciiLowerCase();
+    if ( aScheme == HIERARCHY_URL_SCHEME )
+    {
+        m_aUri = m_aUri.replaceAt( 0, aScheme.getLength(), aScheme );
+
+        sal_Int32 nPos = 0;
+
+        // If the URI has no service specifier, insert default service.
+        // This is for backward compatibility and for convenience.
+
+        if ( m_aUri.getLength() == HIERARCHY_URL_SCHEME.getLength() + 1 )
+        {
+            // root folder URI without path and service specifier.
+            m_aUri += "//" + DEFAULT_DATA_SOURCE_SERVICE + "/";
+            m_aService = DEFAULT_DATA_SOURCE_SERVICE ;
+
+            nPos = m_aUri.getLength() - 1;
+        }
+        else if ( ( m_aUri.getLength() == HIERARCHY_URL_SCHEME.getLength() + 2 )
+                  &&
+                  ( m_aUri[ HIERARCHY_URL_SCHEME.getLength() + 1 ] == '/' ) )
+        {
+            // root folder URI without service specifier.
+            m_aUri += "/" + DEFAULT_DATA_SOURCE_SERVICE + "/";
+            m_aService = DEFAULT_DATA_SOURCE_SERVICE;
+
+            nPos = m_aUri.getLength() - 1;
+        }
+        else if ( ( m_aUri.getLength() > HIERARCHY_URL_SCHEME.getLength() + 2 )
+                  &&
+                  ( m_aUri[ HIERARCHY_URL_SCHEME.getLength() + 2 ] != '/' ) )
+        {
+            // other (no root folder) URI without service specifier.
+            m_aUri = m_aUri.replaceAt(
+                        HIERARCHY_URL_SCHEME.getLength() + 2,
+                        0,
+                        rtl::OUStringConcatenation("/" + DEFAULT_DATA_SOURCE_SERVICE + "/") );
+            m_aService = DEFAULT_DATA_SOURCE_SERVICE;
+
+            nPos
+                = HIERARCHY_URL_SCHEME.getLength() + 3 + m_aService.getLength();
+        }
+        else
+        {
+            // URI with service specifier.
+            sal_Int32 nStart = HIERARCHY_URL_SCHEME.getLength() + 3;
+
+            // Here: - m_aUri has at least the form "<scheme>://"
+            //       - nStart points to char after <scheme>:
+
+            // Only <scheme>:// ?
+            if ( nStart == m_aUri.getLength() )
+            {
+                // error, but remember that we did an init().
+                m_aPath = "/";
+                return;
+            }
+
+            // Empty path segments?
+            if ( m_aUri.indexOf("//", nStart) != -1 )
+            {
+                // error, but remember that we did an init().
+                m_aPath = "/";
+                return;
+            }
+
+            sal_Int32 nEnd = m_aUri.indexOf( '/', nStart );
+
+            // Only <scheme>:/// ?
+            if ( nEnd == nStart )
+            {
+                // error, but remember that we did an init().
+                m_aPath = "/";
+                return;
+            }
+
+            if ( nEnd == -1 )
+            {
+                // Trailing slash missing.
+                nEnd = m_aUri.getLength();
+                m_aUri += "/";
+            }
+
+            m_aService = m_aUri.copy( nStart, nEnd - nStart );
+
+            nPos = nEnd;
+        }
+
+        // Here: - m_aUri has at least the form "<scheme>://<service>/"
+        //       - m_aService was set
+        //       - m_aPath, m_aParentPath, m_aName not yet set
+        //       - nPos points to slash after service specifier
+
+        // Remove trailing slash, if not a root folder URI.
+        sal_Int32 nEnd = m_aUri.lastIndexOf( '/' );
+        if ( ( nEnd > nPos ) && ( nEnd == ( m_aUri.getLength() - 1 ) ) )
+            m_aUri = m_aUri.copy( 0, nEnd );
+
+        // Path (includes leading slash)
+        m_aPath = m_aUri.copy( nPos );
+
+        // parent URI + name
+        sal_Int32 nLastSlash = m_aUri.lastIndexOf( '/' );
+        if ( ( nLastSlash != -1 ) &&
+             ( nLastSlash != m_aUri.getLength() - 1 ) ) // root
+        {
+            m_aParentUri = m_aUri.copy( 0, nLastSlash );
+        }
+
+        // success
+        m_bValid = true;
+    }
+    else
+    {
+        // error, but remember that we did an init().
+        m_aPath = "/";
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/hierarchyuri.hxx b/ucb/source/ucp/hierarchy/hierarchyuri.hxx
new file mode 100644
index 000000000..c3089ef70
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/hierarchyuri.hxx
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <rtl/ustring.hxx>
+
+namespace hierarchy_ucp {
+
+
+class HierarchyUri
+{
+    mutable OUString m_aUri;
+    mutable OUString m_aParentUri;
+    mutable OUString m_aService;
+    mutable OUString m_aPath;
+    mutable bool            m_bValid;
+
+private:
+    void init() const;
+
+public:
+    explicit HierarchyUri( const OUString & rUri )
+    : m_aUri( rUri ), m_bValid( false ) {}
+
+    bool isValid() const
+    { init(); return m_bValid; }
+
+    const OUString & getUri() const
+    { init(); return m_aUri; }
+
+    const OUString & getParentUri() const
+    { init(); return m_aParentUri; }
+
+    const OUString & getService() const
+    { init(); return m_aService; }
+
+    const OUString & getPath() const
+    { init(); return m_aPath; }
+
+    inline bool isRootFolder() const;
+};
+
+inline bool HierarchyUri::isRootFolder() const
+{
+    init();
+    return m_aPath == "/";
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/hierarchy/ucphier1.component b/ucb/source/ucp/hierarchy/ucphier1.component
new file mode 100644
index 000000000..e403857c7
--- /dev/null
+++ b/ucb/source/ucp/hierarchy/ucphier1.component
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+    xmlns="http://openoffice.org/2010/uno-components">
+  <implementation name="com.sun.star.comp.ucb.HierarchyContentProvider"
+    constructor="ucb_HierarchyContentProvider_get_implementation" single-instance="true">
+    <service name="com.sun.star.ucb.HierarchyContentProvider"/>
+  </implementation>
+  <implementation name="com.sun.star.comp.ucb.HierarchyDataSource"
+    constructor="ucb_HierarchyDataSource_get_implementation" single-instance="true">
+    <service name="com.sun.star.ucb.DefaultHierarchyDataSource"/>
+    <service name="com.sun.star.ucb.HierarchyDataSource"/>
+  </implementation>
+</component>