Adding upstream version 4:24.2.0.upstream/4%24.2.0

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

12 files changed, 4814 insertions, 0 deletions

diff --git a/ucb/source/ucp/package/pkgcontent.cxx b/ucb/source/ucp/package/pkgcontent.cxx
new file mode 100644
index 0000000000..de7b9c16ed
--- /dev/null
+++ b/ucb/source/ucp/package/pkgcontent.cxx
@@ -0,0 +1,2689 @@
+/* -*- 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 <sal/config.h>
+
+#include <string_view>
+
+#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/container/XEnumerationAccess.hpp>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/io/BufferSizeExceededException.hpp>
+#include <com/sun/star/io/NotConnectedException.hpp>
+#include <com/sun/star/io/XActiveDataSink.hpp>
+#include <com/sun/star/io/XOutputStream.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/MissingInputStreamException.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/OpenMode.hpp>
+#include <com/sun/star/ucb/TransferInfo.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <com/sun/star/ucb/UnsupportedDataSinkException.hpp>
+#include <com/sun/star/ucb/UnsupportedNameClashException.hpp>
+#include <com/sun/star/ucb/UnsupportedOpenModeException.hpp>
+#include <com/sun/star/ucb/XCommandInfo.hpp>
+#include <com/sun/star/ucb/XPersistentPropertySet.hpp>
+#include <com/sun/star/util/XChangesBatch.hpp>
+#include <com/sun/star/lang/XSingleServiceFactory.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <comphelper/propertysequence.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <ucbhelper/contentidentifier.hxx>
+#include <ucbhelper/propertyvalueset.hxx>
+#include <ucbhelper/cancelcommandexecution.hxx>
+#include <ucbhelper/macros.hxx>
+#include <utility>
+#include "pkgcontent.hxx"
+#include "pkgprovider.hxx"
+#include "pkgresultset.hxx"
+
+#include "../inc/urihelper.hxx"
+
+using namespace com::sun::star;
+using namespace package_ucp;
+
+#define NONE_MODIFIED           sal_uInt32( 0x00 )
+#define MEDIATYPE_MODIFIED      sal_uInt32( 0x01 )
+#define COMPRESSED_MODIFIED     sal_uInt32( 0x02 )
+#define ENCRYPTED_MODIFIED      sal_uInt32( 0x04 )
+#define ENCRYPTIONKEY_MODIFIED  sal_uInt32( 0x08 )
+
+
+// ContentProperties Implementation.
+
+
+ContentProperties::ContentProperties( const OUString& rContentType )
+: aContentType( rContentType ),
+  nSize( 0 ),
+  bCompressed( true ),
+  bEncrypted( false ),
+  bHasEncryptedEntries( false )
+{
+    bIsFolder = rContentType == PACKAGE_FOLDER_CONTENT_TYPE || rContentType == PACKAGE_ZIP_FOLDER_CONTENT_TYPE;
+    bIsDocument = !bIsFolder;
+
+    OSL_ENSURE( bIsFolder || rContentType == PACKAGE_STREAM_CONTENT_TYPE || rContentType == PACKAGE_ZIP_STREAM_CONTENT_TYPE,
+                "ContentProperties::ContentProperties - Unknown type!" );
+}
+
+
+uno::Sequence< ucb::ContentInfo >
+ContentProperties::getCreatableContentsInfo( PackageUri const & rUri ) const
+{
+    if ( bIsFolder )
+    {
+        uno::Sequence< beans::Property > aProps( 1 );
+        aProps.getArray()[ 0 ] = beans::Property(
+                    "Title",
+                    -1,
+                    cppu::UnoType<OUString>::get(),
+                    beans::PropertyAttribute::BOUND );
+
+        uno::Sequence< ucb::ContentInfo > aSeq( 2 );
+
+        // Folder.
+        aSeq.getArray()[ 0 ].Type
+            = Content::getContentType( rUri.getScheme(), true );
+        aSeq.getArray()[ 0 ].Attributes
+            = ucb::ContentInfoAttribute::KIND_FOLDER;
+        aSeq.getArray()[ 0 ].Properties = aProps;
+
+        // Stream.
+        aSeq.getArray()[ 1 ].Type
+            = Content::getContentType( rUri.getScheme(), false );
+        aSeq.getArray()[ 1 ].Attributes
+            = ucb::ContentInfoAttribute::INSERT_WITH_INPUTSTREAM
+              | ucb::ContentInfoAttribute::KIND_DOCUMENT;
+        aSeq.getArray()[ 1 ].Properties = aProps;
+
+        return aSeq;
+    }
+    else
+    {
+        return uno::Sequence< ucb::ContentInfo >( 0 );
+    }
+}
+
+
+// Content Implementation.
+
+
+// static ( "virtual" ctor )
+rtl::Reference<Content> Content::create(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            ContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier )
+{
+    OUString aURL = Identifier->getContentIdentifier();
+    PackageUri aURI( aURL );
+    ContentProperties aProps;
+    uno::Reference< container::XHierarchicalNameAccess > xPackage;
+
+    if ( loadData( pProvider, aURI, aProps, xPackage ) )
+    {
+        // resource exists
+
+        sal_Int32 nLastSlash = aURL.lastIndexOf( '/' );
+        if ( ( nLastSlash + 1 ) == aURL.getLength() )
+        {
+            // Client explicitly requested a folder!
+            if ( !aProps.bIsFolder )
+                return nullptr;
+        }
+
+        uno::Reference< ucb::XContentIdentifier > xId
+            = new ::ucbhelper::ContentIdentifier( aURI.getUri() );
+        return new Content( rxContext, pProvider, xId, xPackage, aURI, std::move(aProps) );
+    }
+    else
+    {
+        // resource doesn't exist
+
+        bool bFolder = false;
+
+        // Guess type according to URI.
+        sal_Int32 nLastSlash = aURL.lastIndexOf( '/' );
+        if ( ( nLastSlash + 1 ) == aURL.getLength() )
+            bFolder = true;
+
+        uno::Reference< ucb::XContentIdentifier > xId
+            = new ::ucbhelper::ContentIdentifier( aURI.getUri() );
+
+        ucb::ContentInfo aInfo;
+        if ( bFolder || aURI.isRootFolder() )
+            aInfo.Type = getContentType( aURI.getScheme(), true );
+        else
+            aInfo.Type = getContentType( aURI.getScheme(), false );
+
+        return new Content( rxContext, pProvider, xId, xPackage, aURI, aInfo );
+    }
+}
+
+
+// static ( "virtual" ctor )
+rtl::Reference<Content> Content::create(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            ContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier,
+            const ucb::ContentInfo& Info )
+{
+    if ( Info.Type.isEmpty() )
+        return nullptr;
+
+    PackageUri aURI( Identifier->getContentIdentifier() );
+
+    if ( !Info.Type.equalsIgnoreAsciiCase(
+                getContentType( aURI.getScheme(), true ) ) &&
+         !Info.Type.equalsIgnoreAsciiCase(
+                getContentType( aURI.getScheme(), false ) ) )
+        return nullptr;
+
+    uno::Reference< container::XHierarchicalNameAccess > xPackage = pProvider->createPackage( aURI );
+
+    uno::Reference< ucb::XContentIdentifier > xId
+        = new ::ucbhelper::ContentIdentifier( aURI.getUri() );
+    return new Content( rxContext, pProvider, xId, xPackage, std::move(aURI), Info );
+}
+
+
+// static
+OUString Content::getContentType(
+    std::u16string_view aScheme, bool bFolder )
+{
+    return ( OUString::Concat("application/")
+             + aScheme
+             + ( bFolder
+                 ? std::u16string_view(u"-folder")
+                 : std::u16string_view(u"-stream") ) );
+}
+
+
+Content::Content(
+        const uno::Reference< uno::XComponentContext >& rxContext,
+        ContentProvider* pProvider,
+        const uno::Reference< ucb::XContentIdentifier >& Identifier,
+        uno::Reference< container::XHierarchicalNameAccess > Package,
+        PackageUri aUri,
+        ContentProperties aProps )
+: ContentImplHelper( rxContext, pProvider, Identifier ),
+  m_aUri(std::move( aUri )),
+  m_aProps(std::move( aProps )),
+  m_eState( PERSISTENT ),
+  m_xPackage(std::move( Package )),
+  m_pProvider( pProvider ),
+  m_nModifiedProps( NONE_MODIFIED )
+{
+}
+
+
+Content::Content(
+        const uno::Reference< uno::XComponentContext >& rxContext,
+        ContentProvider* pProvider,
+        const uno::Reference< ucb::XContentIdentifier >& Identifier,
+        uno::Reference< container::XHierarchicalNameAccess > Package,
+        PackageUri aUri,
+        const ucb::ContentInfo& Info )
+  : ContentImplHelper( rxContext, pProvider, Identifier ),
+  m_aUri(std::move( aUri )),
+  m_aProps( Info.Type ),
+  m_eState( TRANSIENT ),
+  m_xPackage(std::move( Package )),
+  m_pProvider( pProvider ),
+  m_nModifiedProps( NONE_MODIFIED )
+{
+}
+
+
+// virtual
+Content::~Content()
+{
+}
+
+
+// XInterface methods.
+
+
+// virtual
+void SAL_CALL Content::acquire()
+    noexcept
+{
+    ContentImplHelper::acquire();
+}
+
+
+// virtual
+void SAL_CALL Content::release()
+    noexcept
+{
+    ContentImplHelper::release();
+}
+
+
+// virtual
+uno::Any SAL_CALL Content::queryInterface( const uno::Type & rType )
+{
+    uno::Any aRet;
+
+    if ( isFolder() )
+        aRet = cppu::queryInterface(
+                rType, static_cast< ucb::XContentCreator * >( this ) );
+
+    return aRet.hasValue() ? aRet : ContentImplHelper::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_COMMON_IMPL( Content );
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL Content::getTypes()
+{
+    if ( isFolder() )
+    {
+        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 Content::getImplementationName()
+{
+    return "com.sun.star.comp.ucb.PackageContent";
+}
+
+
+// virtual
+uno::Sequence< OUString > SAL_CALL Content::getSupportedServiceNames()
+{
+    return { isFolder()? OUString("com.sun.star.ucb.PackageFolderContent"):OUString("com.sun.star.ucb.PackageStreamContent") } ;
+}
+
+
+// XContent methods.
+
+
+// virtual
+OUString SAL_CALL Content::getContentType()
+{
+    return m_aProps.aContentType;
+}
+
+
+// XCommandProcessor methods.
+
+
+// virtual
+uno::Any SAL_CALL Content::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!",
+                                    getXWeak(),
+                                    -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!",
+                                    getXWeak(),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        if ( !aProperties.hasElements() )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "No properties!",
+                                    getXWeak(),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= setPropertyValues( aProperties, Environment );
+    }
+    else if ( aCommand.Name == "getPropertySetInfo" )
+    {
+
+        // getPropertySetInfo
+
+
+        // Note: Implemented by base class.
+        aRet <<= getPropertySetInfo( Environment );
+    }
+    else if ( aCommand.Name == "getCommandInfo" )
+    {
+
+        // getCommandInfo
+
+
+        // Note: Implemented by base class.
+        aRet <<= getCommandInfo( Environment );
+    }
+    else if ( aCommand.Name == "open" )
+    {
+
+        // open
+
+
+        ucb::OpenCommandArgument2 aOpenCommand;
+        if ( !( aCommand.Argument >>= aOpenCommand ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    getXWeak(),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet = open( aOpenCommand, Environment );
+    }
+    else if ( !m_aUri.isRootFolder() && aCommand.Name == "insert" )
+    {
+
+        // insert
+
+
+        ucb::InsertCommandArgument aArg;
+        if ( !( aCommand.Argument >>= aArg ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    getXWeak(),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        sal_Int32 nNameClash = aArg.ReplaceExisting
+                             ? ucb::NameClash::OVERWRITE
+                             : ucb::NameClash::ERROR;
+        insert( aArg.Data, nNameClash, Environment );
+    }
+    else if ( !m_aUri.isRootFolder() && aCommand.Name == "delete" )
+    {
+
+        // delete
+
+
+        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" )
+    {
+
+        // transfer
+        //      ( Not available at stream objects )
+
+
+        ucb::TransferInfo aInfo;
+        if ( !( aCommand.Argument >>= aInfo ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    getXWeak(),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        transfer( aInfo, Environment );
+    }
+    else if ( aCommand.Name == "createNewContent" && isFolder() )
+    {
+
+        // createNewContent
+        //      ( Not available at stream objects )
+
+
+        ucb::ContentInfo aInfo;
+        if ( !( aCommand.Argument >>= aInfo ) )
+        {
+            OSL_FAIL( "Wrong argument type!" );
+            ucbhelper::cancelCommandExecution(
+                uno::Any( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    getXWeak(),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= createNewContent( aInfo );
+    }
+    else if ( aCommand.Name == "flush" )
+    {
+
+        // flush
+        //      ( Not available at stream objects )
+
+
+        if( !flushData() )
+        {
+            uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+            {
+                {"Uri", uno::Any(m_xIdentifier->getContentIdentifier())}
+            }));
+            ucbhelper::cancelCommandExecution(
+                ucb::IOErrorCode_CANT_WRITE,
+                aArgs,
+                Environment,
+                "Cannot write file to disk!",
+                this );
+            // Unreachable
+        }
+    }
+    else
+    {
+
+        // Unsupported command
+
+
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::UnsupportedCommandException(
+                                OUString(),
+                                getXWeak() ) ),
+            Environment );
+        // Unreachable
+    }
+
+    return aRet;
+}
+
+
+// virtual
+void SAL_CALL Content::abort( sal_Int32 /*CommandId*/ )
+{
+    // @@@ Implement logic to abort running commands, if this makes
+    //     sense for your content.
+}
+
+
+// XContentCreator methods.
+
+
+// virtual
+uno::Sequence< ucb::ContentInfo > SAL_CALL
+Content::queryCreatableContentsInfo()
+{
+    return m_aProps.getCreatableContentsInfo( m_aUri );
+}
+
+
+// virtual
+uno::Reference< ucb::XContent > SAL_CALL
+Content::createNewContent( const ucb::ContentInfo& Info )
+{
+    if ( isFolder() )
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        if ( Info.Type.isEmpty() )
+            return uno::Reference< ucb::XContent >();
+
+        if ( !Info.Type.equalsIgnoreAsciiCase(
+                getContentType( m_aUri.getScheme(), true ) ) &&
+             !Info.Type.equalsIgnoreAsciiCase(
+                getContentType( m_aUri.getScheme(), false ) ) )
+            return uno::Reference< ucb::XContent >();
+
+        OUString aURL = m_aUri.getUri() + "/";
+
+        if ( Info.Type.equalsIgnoreAsciiCase(
+                getContentType( m_aUri.getScheme(), true ) ) )
+            aURL += "New_Folder";
+        else
+            aURL += "New_Stream";
+
+        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 >();
+    }
+}
+
+
+// Non-interface methods.
+
+
+// virtual
+OUString Content::getParentURL()
+{
+    return m_aUri.getParentUri();
+}
+
+
+// static
+uno::Reference< sdbc::XRow > Content::getPropertyValues(
+                const uno::Reference< uno::XComponentContext >& rxContext,
+                const uno::Sequence< beans::Property >& rProperties,
+                ContentProvider* pProvider,
+                const OUString& rContentId )
+{
+    ContentProperties aData;
+    uno::Reference< container::XHierarchicalNameAccess > xPackage;
+    if ( loadData( pProvider, PackageUri( rContentId ), aData, xPackage ) )
+    {
+        return getPropertyValues( rxContext,
+                                  rProperties,
+                                  aData,
+                                  rtl::Reference<
+                                    ::ucbhelper::ContentProviderImplHelper >(
+                                        pProvider ),
+                                  rContentId );
+    }
+    else
+    {
+        rtl::Reference< ::ucbhelper::PropertyValueSet > xRow
+            = new ::ucbhelper::PropertyValueSet( rxContext );
+
+        for ( const beans::Property& rProp : rProperties )
+            xRow->appendVoid( rProp );
+
+        return xRow;
+    }
+}
+
+
+// static
+uno::Reference< sdbc::XRow > Content::getPropertyValues(
+        const uno::Reference< uno::XComponentContext >& rxContext,
+        const uno::Sequence< beans::Property >& rProperties,
+        const ContentProperties& rData,
+        const rtl::Reference< ::ucbhelper::ContentProviderImplHelper >&
+            rProvider,
+        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.aContentType );
+            }
+            else if ( rProp.Name == "Title" )
+            {
+                xRow->appendString ( rProp, rData.aTitle );
+            }
+            else if ( rProp.Name == "IsDocument" )
+            {
+                xRow->appendBoolean( rProp, rData.bIsDocument );
+            }
+            else if ( rProp.Name == "IsFolder" )
+            {
+                xRow->appendBoolean( rProp, rData.bIsFolder );
+            }
+            else if ( rProp.Name == "CreatableContentsInfo" )
+            {
+                xRow->appendObject(
+                    rProp, uno::Any(
+                        rData.getCreatableContentsInfo(
+                            PackageUri( rContentId ) ) ) );
+            }
+            else if ( rProp.Name == "MediaType" )
+            {
+                xRow->appendString ( rProp, rData.aMediaType );
+            }
+            else if ( rProp.Name == "Size" )
+            {
+                // Property only available for streams.
+                if ( rData.bIsDocument )
+                    xRow->appendLong( rProp, rData.nSize );
+                else
+                    xRow->appendVoid( rProp );
+            }
+            else if ( rProp.Name == "Compressed" )
+            {
+                // Property only available for streams.
+                if ( rData.bIsDocument )
+                    xRow->appendBoolean( rProp, rData.bCompressed );
+                else
+                    xRow->appendVoid( rProp );
+            }
+            else if ( rProp.Name == "Encrypted" )
+            {
+                // Property only available for streams.
+                if ( rData.bIsDocument )
+                    xRow->appendBoolean( rProp, rData.bEncrypted );
+                else
+                    xRow->appendVoid( rProp );
+            }
+            else if ( rProp.Name == "HasEncryptedEntries" )
+            {
+                // Property only available for root folder.
+                PackageUri aURI( rContentId );
+                if ( aURI.isRootFolder() )
+                    xRow->appendBoolean( rProp, rData.bHasEncryptedEntries );
+                else
+                    xRow->appendVoid( rProp );
+            }
+            else
+            {
+                // Not a Core Property! Maybe it's an Additional Core Property?!
+
+                if ( !bTriedToGetAdditionalPropSet && !xAdditionalPropSet.is() )
+                {
+                    xAdditionalPropSet =
+                            rProvider->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.aContentType );
+        xRow->appendString(
+            beans::Property(
+                "Title",
+                -1,
+                cppu::UnoType<OUString>::get(),
+                beans::PropertyAttribute::BOUND ),
+            rData.aTitle );
+        xRow->appendBoolean(
+            beans::Property(
+                "IsDocument",
+                -1,
+                cppu::UnoType<bool>::get(),
+                beans::PropertyAttribute::BOUND
+                    | beans::PropertyAttribute::READONLY ),
+            rData.bIsDocument );
+        xRow->appendBoolean(
+            beans::Property(
+                "IsFolder",
+                -1,
+                cppu::UnoType<bool>::get(),
+                beans::PropertyAttribute::BOUND
+                    | beans::PropertyAttribute::READONLY ),
+            rData.bIsFolder );
+        xRow->appendObject(
+            beans::Property(
+                "CreatableContentsInfo",
+                -1,
+                cppu::UnoType<uno::Sequence< ucb::ContentInfo >>::get(),
+                beans::PropertyAttribute::BOUND
+                | beans::PropertyAttribute::READONLY ),
+            uno::Any(
+                rData.getCreatableContentsInfo( PackageUri( rContentId ) ) ) );
+        xRow->appendString(
+            beans::Property(
+                "MediaType",
+                -1,
+                cppu::UnoType<OUString>::get(),
+                beans::PropertyAttribute::BOUND ),
+            rData.aMediaType );
+
+        // Properties only available for streams.
+        if ( rData.bIsDocument )
+        {
+            xRow->appendLong(
+                beans::Property(
+                    "Size",
+                    -1,
+                    cppu::UnoType<sal_Int64>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY ),
+                rData.nSize );
+
+            xRow->appendBoolean(
+                beans::Property(
+                    "Compressed",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND ),
+                rData.bCompressed );
+
+            xRow->appendBoolean(
+                beans::Property(
+                    "Encrypted",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND ),
+                rData.bEncrypted );
+        }
+
+        // Properties only available for root folder.
+        PackageUri aURI( rContentId );
+        if ( aURI.isRootFolder() )
+        {
+            xRow->appendBoolean(
+                beans::Property(
+                    "HasEncryptedEntries",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY ),
+                rData.bHasEncryptedEntries );
+        }
+
+        // Append all Additional Core Properties.
+
+        uno::Reference< beans::XPropertySet > xSet =
+            rProvider->getAdditionalPropertySet( rContentId, false );
+        xRow->appendPropertySet( xSet );
+    }
+
+    return xRow;
+}
+
+
+uno::Reference< sdbc::XRow > Content::getPropertyValues(
+                        const uno::Sequence< beans::Property >& rProperties )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+    return getPropertyValues( m_xContext,
+                              rProperties,
+                              m_aProps,
+                              m_xProvider,
+                              m_xIdentifier->getContentIdentifier() );
+}
+
+
+uno::Sequence< uno::Any > Content::setPropertyValues(
+        const uno::Sequence< beans::PropertyValue >& rValues,
+        const uno::Reference< ucb::XCommandEnvironment > & xEnv )
+{
+    osl::ClearableGuard< 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         = getXWeak();
+    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;
+    bool bStore    = false;
+    OUString aNewTitle;
+    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!",
+                            getXWeak() );
+        }
+        else if ( rValue.Name == "IsDocument" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            getXWeak() );
+        }
+        else if ( rValue.Name == "IsFolder" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            getXWeak() );
+        }
+        else if ( rValue.Name == "CreatableContentsInfo" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            getXWeak() );
+        }
+        else if ( rValue.Name == "Title" )
+        {
+            if ( m_aUri.isRootFolder() )
+            {
+                // Read-only property!
+                aRetRange[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                getXWeak() );
+            }
+            else
+            {
+                OUString aNewValue;
+                if ( rValue.Value >>= aNewValue )
+                {
+                    // No empty titles!
+                    if ( !aNewValue.isEmpty() )
+                    {
+                        if ( aNewValue != m_aProps.aTitle )
+                        {
+                            // modified title -> modified URL -> exchange !
+                            if ( m_eState == PERSISTENT )
+                                bExchange = true;
+
+                            // new value will be set later...
+                            aNewTitle = aNewValue;
+
+                            // remember position within sequence of values
+                            // (for error handling).
+                            nTitlePos = n;
+                        }
+                    }
+                    else
+                    {
+                        aRetRange[ n ] <<=
+                            lang::IllegalArgumentException(
+                                "Empty title not allowed!",
+                                getXWeak(),
+                                -1 );
+                    }
+                }
+                else
+                {
+                    aRetRange[ n ] <<=
+                        beans::IllegalTypeException(
+                            "Property value has wrong type!",
+                            getXWeak() );
+                }
+            }
+        }
+        else if ( rValue.Name == "MediaType" )
+        {
+            OUString aNewValue;
+            if ( rValue.Value >>= aNewValue )
+            {
+                if ( aNewValue != m_aProps.aMediaType )
+                {
+                    aEvent.PropertyName = rValue.Name;
+                    aEvent.OldValue     <<= m_aProps.aMediaType;
+                    aEvent.NewValue     <<= aNewValue;
+
+                    m_aProps.aMediaType = aNewValue;
+                    nChanged++;
+                    bStore = true;
+                    m_nModifiedProps |= MEDIATYPE_MODIFIED;
+                }
+            }
+            else
+            {
+                aRetRange[ n ] <<= beans::IllegalTypeException(
+                                "Property value has wrong type!",
+                                getXWeak() );
+            }
+        }
+        else if ( rValue.Name == "Size" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            getXWeak() );
+        }
+        else if ( rValue.Name == "Compressed" )
+        {
+            // Property only available for streams.
+            if ( m_aProps.bIsDocument )
+            {
+                bool bNewValue;
+                if ( rValue.Value >>= bNewValue )
+                {
+                    if ( bNewValue != m_aProps.bCompressed )
+                    {
+                        aEvent.PropertyName = rValue.Name;
+                        aEvent.OldValue <<= m_aProps.bCompressed;
+                        aEvent.NewValue <<= bNewValue;
+
+                        m_aProps.bCompressed = bNewValue;
+                        nChanged++;
+                        bStore = true;
+                        m_nModifiedProps |= COMPRESSED_MODIFIED;
+                    }
+                }
+                else
+                {
+                    aRetRange[ n ] <<= beans::IllegalTypeException(
+                                "Property value has wrong type!",
+                                getXWeak() );
+                }
+            }
+            else
+            {
+                aRetRange[ n ] <<= beans::UnknownPropertyException(
+                                "Compressed only supported by streams!",
+                                getXWeak() );
+            }
+        }
+        else if ( rValue.Name == "Encrypted" )
+        {
+            // Property only available for streams.
+            if ( m_aProps.bIsDocument )
+            {
+                bool bNewValue;
+                if ( rValue.Value >>= bNewValue )
+                {
+                    if ( bNewValue != m_aProps.bEncrypted )
+                    {
+                        aEvent.PropertyName = rValue.Name;
+                        aEvent.OldValue <<= m_aProps.bEncrypted;
+                        aEvent.NewValue <<= bNewValue;
+
+                        m_aProps.bEncrypted = bNewValue;
+                        nChanged++;
+                        bStore = true;
+                        m_nModifiedProps |= ENCRYPTED_MODIFIED;
+                    }
+                }
+                else
+                {
+                    aRetRange[ n ] <<= beans::IllegalTypeException(
+                                "Property value has wrong type!",
+                                getXWeak() );
+                }
+            }
+            else
+            {
+                aRetRange[ n ] <<= beans::UnknownPropertyException(
+                                "Encrypted only supported by streams!",
+                                getXWeak() );
+            }
+        }
+        else if ( rValue.Name == "HasEncryptedEntries" )
+        {
+            // Read-only property!
+            aRetRange[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            getXWeak() );
+        }
+        else if ( rValue.Name == "EncryptionKey" )
+        {
+            // @@@ This is a temporary solution. In the future submitting
+            //     the key should be done using an interaction handler!
+
+            // Write-Only property. Only supported by root folder and streams
+            // (all non-root folders of a package have the same encryption key).
+            if ( m_aUri.isRootFolder() || m_aProps.bIsDocument )
+            {
+                uno::Sequence < sal_Int8 > aNewValue;
+                if ( rValue.Value >>= aNewValue )
+                {
+                    if ( aNewValue != m_aProps.aEncryptionKey )
+                    {
+                        aEvent.PropertyName = rValue.Name;
+                        aEvent.OldValue     <<= m_aProps.aEncryptionKey;
+                        aEvent.NewValue     <<= aNewValue;
+
+                        m_aProps.aEncryptionKey = aNewValue;
+                        nChanged++;
+                        bStore = true;
+                        m_nModifiedProps |= ENCRYPTIONKEY_MODIFIED;
+                    }
+                }
+                else
+                {
+                    aRetRange[ n ] <<= beans::IllegalTypeException(
+                                "Property value has wrong type!",
+                                getXWeak() );
+                }
+            }
+            else
+            {
+                aRetRange[ n ] <<= beans::UnknownPropertyException(
+                        "EncryptionKey not supported by non-root folder!",
+                        getXWeak() );
+            }
+        }
+        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!",
+                                getXWeak() );
+            }
+        }
+    }
+
+    if ( bExchange )
+    {
+        uno::Reference< ucb::XContentIdentifier > xOldId = m_xIdentifier;
+
+        // Assemble new content identifier...
+        OUString aNewURL = m_aUri.getParentUri() + "/" +
+            ::ucb_impl::urihelper::encodeSegment( aNewTitle );
+        uno::Reference< ucb::XContentIdentifier > xNewId
+            = new ::ucbhelper::ContentIdentifier( aNewURL );
+
+        aGuard.clear();
+        if ( exchangeIdentity( xNewId ) )
+        {
+            // Adapt persistent data.
+            renameData( xOldId, xNewId );
+
+            // Adapt Additional Core Properties.
+            renameAdditionalPropertySet( xOldId->getContentIdentifier(),
+                                         xNewId->getContentIdentifier() );
+        }
+        else
+        {
+            // Do not set new title!
+            aNewTitle.clear();
+
+            // Set error .
+            aRetRange[ nTitlePos ] <<= uno::Exception(
+                    "Exchange failed!",
+                    getXWeak() );
+        }
+    }
+
+    if ( !aNewTitle.isEmpty() )
+    {
+        aEvent.PropertyName = "Title";
+        aEvent.OldValue     <<= m_aProps.aTitle;
+        aEvent.NewValue     <<= aNewTitle;
+
+        m_aProps.aTitle = aNewTitle;
+
+        aChanges.getArray()[ nChanged ] = aEvent;
+        nChanged++;
+    }
+
+    if ( nChanged > 0 )
+    {
+        // Save changes, if content was already made persistent.
+        if ( ( m_nModifiedProps & ENCRYPTIONKEY_MODIFIED ) ||
+             ( bStore && ( m_eState == PERSISTENT ) ) )
+        {
+            if ( !storeData( uno::Reference< io::XInputStream >() ) )
+            {
+                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
+            }
+        }
+
+        aGuard.clear();
+        aChanges.realloc( nChanged );
+        notifyPropertiesChange( aChanges );
+    }
+
+    return aRet;
+}
+
+
+uno::Any Content::open(
+                const ucb::OpenCommandArgument2& rArg,
+                const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    if ( rArg.Mode == ucb::OpenMode::ALL ||
+         rArg.Mode == ucb::OpenMode::FOLDERS ||
+         rArg.Mode == ucb::OpenMode::DOCUMENTS )
+    {
+
+        // open command for a folder content
+
+
+        uno::Reference< ucb::XDynamicResultSet > xSet
+            = new DynamicResultSet( m_xContext, this, rArg, xEnv );
+        return uno::Any( xSet );
+    }
+    else
+    {
+
+        // open command for a document content
+
+
+        if ( ( rArg.Mode == ucb::OpenMode::DOCUMENT_SHARE_DENY_NONE ) ||
+             ( rArg.Mode == ucb::OpenMode::DOCUMENT_SHARE_DENY_WRITE ) )
+        {
+            // Currently(?) unsupported.
+            ucbhelper::cancelCommandExecution(
+                uno::Any( ucb::UnsupportedOpenModeException(
+                                    OUString(),
+                                    getXWeak(),
+                                    sal_Int16( rArg.Mode ) ) ),
+                xEnv );
+            // Unreachable
+        }
+
+        uno::Reference< io::XOutputStream > xOut( rArg.Sink, uno::UNO_QUERY );
+        if ( xOut.is() )
+        {
+            // PUSH: write data into xOut
+
+            uno::Reference< io::XInputStream > xIn = getInputStream();
+            if ( !xIn.is() )
+            {
+                // No interaction if we are not persistent!
+                uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+                {
+                    {"Uri", uno::Any(m_xIdentifier->getContentIdentifier())}
+                }));
+                ucbhelper::cancelCommandExecution(
+                    ucb::IOErrorCode_CANT_READ,
+                    aArgs,
+                    m_eState == PERSISTENT
+                        ? xEnv
+                        : uno::Reference< ucb::XCommandEnvironment >(),
+                    "Got no data stream!",
+                    this );
+                // Unreachable
+            }
+
+            try
+            {
+                uno::Sequence< sal_Int8 > aBuffer;
+                while (true)
+                {
+                    sal_Int32 nRead = xIn->readSomeBytes( aBuffer, 65536 );
+                    if (!nRead)
+                        break;
+                    aBuffer.realloc( nRead );
+                    xOut->writeBytes( aBuffer );
+                }
+
+                xOut->closeOutput();
+            }
+            catch ( io::NotConnectedException const & )
+            {
+                // closeOutput, readSomeBytes, writeBytes
+            }
+            catch ( io::BufferSizeExceededException const & )
+            {
+                // closeOutput, readSomeBytes, writeBytes
+            }
+            catch ( io::IOException const & )
+            {
+                // closeOutput, readSomeBytes, writeBytes
+            }
+        }
+        else
+        {
+            uno::Reference< io::XActiveDataSink > xDataSink(
+                                            rArg.Sink, uno::UNO_QUERY );
+            if ( xDataSink.is() )
+            {
+                // PULL: wait for client read
+
+                uno::Reference< io::XInputStream > xIn = getInputStream();
+                if ( !xIn.is() )
+                {
+                    // No interaction if we are not persistent!
+                    uno::Sequence<uno::Any> aArgs(comphelper::InitAnyPropertySequence(
+                    {
+                        {"Uri", uno::Any(m_xIdentifier->getContentIdentifier())}
+                    }));
+                    ucbhelper::cancelCommandExecution(
+                        ucb::IOErrorCode_CANT_READ,
+                        aArgs,
+                        m_eState == PERSISTENT
+                            ? xEnv
+                            : uno::Reference<
+                                  ucb::XCommandEnvironment >(),
+                        "Got no data stream!",
+                        this );
+                    // Unreachable
+                }
+
+                // Done.
+                xDataSink->setInputStream( xIn );
+            }
+            else
+            {
+                // Note: aOpenCommand.Sink may contain an XStream
+                //       implementation. Support for this type of
+                //       sink is optional...
+                ucbhelper::cancelCommandExecution(
+                    uno::Any(
+                        ucb::UnsupportedDataSinkException(
+                                OUString(),
+                                getXWeak(),
+                                rArg.Sink ) ),
+                    xEnv );
+                // Unreachable
+            }
+        }
+    }
+
+    return uno::Any();
+}
+
+
+void Content::insert(
+            const uno::Reference< io::XInputStream >& xStream,
+            sal_Int32 nNameClashResolve,
+            const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    osl::ClearableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    // Check, if all required properties were set.
+    if ( isFolder() )
+    {
+        // Required: Title
+
+        if ( m_aProps.aTitle.isEmpty() )
+            m_aProps.aTitle = m_aUri.getName();
+    }
+    else
+    {
+        // Required: rArg.Data
+
+        if ( !xStream.is() )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::Any( ucb::MissingInputStreamException(
+                                OUString(),
+                                getXWeak() ) ),
+                xEnv );
+            // Unreachable
+        }
+
+        // Required: Title
+
+        if ( m_aProps.aTitle.isEmpty() )
+            m_aProps.aTitle = m_aUri.getName();
+    }
+
+    OUString aNewURL = m_aUri.getParentUri();
+    if (1 + aNewURL.lastIndexOf('/') != aNewURL.getLength())
+        aNewURL += "/";
+    aNewURL += ::ucb_impl::urihelper::encodeSegment( m_aProps.aTitle );
+    PackageUri aNewUri( aNewURL );
+
+    // Handle possible name clash...
+    switch ( nNameClashResolve )
+    {
+        // fail.
+        case ucb::NameClash::ERROR:
+            if ( hasData( aNewUri ) )
+            {
+                ucbhelper::cancelCommandExecution(
+                    uno::Any( ucb::NameClashException(
+                                    OUString(),
+                                    getXWeak(),
+                                    task::InteractionClassification_ERROR,
+                                    m_aProps.aTitle ) ),
+                    xEnv );
+                // Unreachable
+            }
+            break;
+
+        // replace (possibly) existing object.
+        case ucb::NameClash::OVERWRITE:
+            break;
+
+        // "invent" a new valid title.
+        case ucb::NameClash::RENAME:
+            if ( hasData( aNewUri ) )
+            {
+                sal_Int32 nTry = 0;
+
+                do
+                {
+                    OUString aNew = aNewUri.getUri() + "_" + OUString::number( ++nTry );
+                    aNewUri.setUri( aNew );
+                }
+                while ( hasData( aNewUri ) && ( nTry < 1000 ) );
+
+                if ( nTry == 1000 )
+                {
+                    ucbhelper::cancelCommandExecution(
+                        uno::Any(
+                            ucb::UnsupportedNameClashException(
+                                "Unable to resolve name clash!",
+                                getXWeak(),
+                                nNameClashResolve ) ),
+                    xEnv );
+                    // Unreachable
+                }
+                else
+                {
+                    m_aProps.aTitle += "_";
+                    m_aProps.aTitle += OUString::number( nTry );
+                }
+            }
+            break;
+
+        case ucb::NameClash::KEEP: // deprecated
+        case ucb::NameClash::ASK:
+        default:
+            if ( hasData( aNewUri ) )
+            {
+                ucbhelper::cancelCommandExecution(
+                    uno::Any(
+                        ucb::UnsupportedNameClashException(
+                            OUString(),
+                            getXWeak(),
+                            nNameClashResolve ) ),
+                    xEnv );
+                // Unreachable
+            }
+            break;
+    }
+
+    // Identifier changed?
+    bool bNewId = ( m_aUri.getUri() != aNewUri.getUri() );
+
+    if ( bNewId )
+    {
+        m_xIdentifier = new ::ucbhelper::ContentIdentifier( aNewURL );
+        m_aUri = aNewUri;
+    }
+
+    if ( !storeData( xStream ) )
+    {
+        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 )
+    {
+        // Take over correct default values from underlying packager...
+        uno::Reference< container::XHierarchicalNameAccess > xXHierarchicalNameAccess;
+        loadData( m_pProvider,
+                  m_aUri,
+                  m_aProps,
+                  xXHierarchicalNameAccess );
+
+        aGuard.clear();
+        inserted();
+    }
+}
+
+
+void Content::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!",
+                                getXWeak() ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    m_eState = DEAD;
+
+    aGuard.clear();
+    deleted();
+
+    if ( isFolder() )
+    {
+        // Process instantiated children...
+
+        ContentRefList aChildren;
+        queryChildren( aChildren );
+
+        for ( auto& rChild : aChildren )
+        {
+            rChild->destroy( bDeletePhysical, xEnv );
+        }
+    }
+}
+
+
+void Content::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!",
+                                getXWeak() ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Is source a package content?
+    if ( ( rInfo.SourceURL.isEmpty() ) ||
+         ( rInfo.SourceURL.compareTo(
+            m_aUri.getUri(), PACKAGE_URL_SCHEME_LENGTH + 3 ) != 0 ) )
+    {
+        ucbhelper::cancelCommandExecution(
+            uno::Any( ucb::InteractiveBadTransferURLException(
+                                OUString(),
+                                getXWeak() ) ),
+            xEnv );
+        // Unreachable
+    }
+
+    // Is source not a parent of me / not me?
+    OUString aId = m_aUri.getParentUri() + "/";
+
+    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 PackageContentProvider.
+    rtl::Reference< Content > xSource;
+
+    try
+    {
+        xSource = static_cast< Content * >(
+                        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()
+            ? getContentType( m_aUri.getScheme(), true )
+            : getContentType( m_aUri.getScheme(), false );
+    ucb::ContentInfo aContentInfo;
+    aContentInfo.Type = aType;
+    aContentInfo.Attributes = 0;
+
+    // Note: The static cast is okay here, because its sure that
+    //       createNewContent always creates a Content.
+    rtl::Reference< Content > xTarget
+        = static_cast< Content * >( 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( xSource->getInputStream(), rInfo.NameClash, xEnv );
+
+
+    // 4) Transfer (copy) children of source.
+
+
+    if ( xSource->isFolder() )
+    {
+        uno::Reference< container::XEnumeration > xIter
+            = xSource->getIterator();
+        if ( xIter.is() )
+        {
+            while ( xIter->hasMoreElements() )
+            {
+                try
+                {
+                    uno::Reference< container::XNamed > xNamed;
+                    xIter->nextElement() >>= xNamed;
+
+                    if ( !xNamed.is() )
+                    {
+                        OSL_FAIL( "Content::transfer - Got no XNamed!" );
+                        break;
+                    }
+
+                    OUString aName = xNamed->getName();
+
+                    if ( aName.isEmpty() )
+                    {
+                        OSL_FAIL( "Content::transfer - Empty name!" );
+                        break;
+                    }
+
+                    OUString aChildId = xId->getContentIdentifier();
+                    if ( ( aChildId.lastIndexOf( '/' ) + 1 )
+                                                != aChildId.getLength() )
+                        aChildId += "/";
+
+                    aChildId += ::ucb_impl::urihelper::encodeSegment( aName );
+
+                    ucb::TransferInfo aInfo;
+                    aInfo.MoveData  = false;
+                    aInfo.NewTitle.clear();
+                    aInfo.SourceURL = aChildId;
+                    aInfo.NameClash = rInfo.NameClash;
+
+                    // Transfer child to target.
+                    xTarget->transfer( aInfo, xEnv );
+                }
+                catch ( container::NoSuchElementException const & )
+                {
+                }
+                catch ( lang::WrappedTargetException const & )
+                {
+                }
+            }
+        }
+    }
+
+
+    // 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();
+}
+
+
+bool Content::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( "Content::exchangeIdentity - Not persistent!" );
+        return false;
+    }
+
+    // Exchange own identity.
+
+    // Fail, if a content with given id already exists.
+    PackageUri aNewUri( xNewId->getContentIdentifier() );
+    if ( !hasData( aNewUri ) )
+    {
+        OUString aOldURL = m_xIdentifier->getContentIdentifier();
+
+        aGuard.clear();
+        if ( exchange( xNewId ) )
+        {
+            m_aUri = aNewUri;
+            if ( isFolder() )
+            {
+                // Process instantiated children...
+
+                ContentRefList aChildren;
+                queryChildren( aChildren );
+
+                for ( const auto& rChild : aChildren )
+                {
+                    ContentRef 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( "Content::exchangeIdentity - Panic! Cannot exchange identity!" );
+    return false;
+}
+
+
+void Content::queryChildren( ContentRefList& rChildren )
+{
+    // 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();
+
+    OSL_ENSURE( aURL.lastIndexOf( '/' ) != ( aURL.getLength() - 1 ),
+                "Content::queryChildren - Invalid URL!" );
+
+    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 ) ) )
+        {
+            if ( aChildURL.indexOf( '/', nLen ) == -1 )
+            {
+                // No further slashes. It's a child!
+                rChildren.emplace_back(
+                        static_cast< Content * >( xChild.get() ) );
+            }
+        }
+    }
+}
+
+
+uno::Reference< container::XHierarchicalNameAccess > Content::getPackage(
+                                                const PackageUri& rURI )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( rURI.getPackage() == m_aUri.getPackage() )
+    {
+        if ( !m_xPackage.is() )
+            m_xPackage = m_pProvider->createPackage( m_aUri );
+
+        return m_xPackage;
+    }
+
+    return m_pProvider->createPackage( rURI );
+}
+
+
+uno::Reference< container::XHierarchicalNameAccess > Content::getPackage()
+{
+    return getPackage( m_aUri );
+}
+
+
+// static
+bool Content::hasData(
+            ContentProvider* pProvider,
+            const PackageUri& rURI,
+            uno::Reference< container::XHierarchicalNameAccess > & rxPackage )
+{
+    rxPackage = pProvider->createPackage( rURI );
+    return rxPackage->hasByHierarchicalName( rURI.getPath() );
+}
+
+
+bool Content::hasData( const PackageUri& rURI )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< container::XHierarchicalNameAccess > xPackage;
+    if ( rURI.getPackage() == m_aUri.getPackage() )
+    {
+        xPackage = getPackage();
+        return xPackage->hasByHierarchicalName( rURI.getPath() );
+    }
+
+    return hasData( m_pProvider, rURI, xPackage );
+}
+
+
+//static
+bool Content::loadData(
+            ContentProvider* pProvider,
+            const PackageUri& rURI,
+            ContentProperties& rProps,
+            uno::Reference< container::XHierarchicalNameAccess > & rxPackage )
+{
+    rxPackage = pProvider->createPackage( rURI );
+
+    if ( rURI.isRootFolder() )
+    {
+        // Properties available only from package
+        uno::Reference< beans::XPropertySet > xPackagePropSet(
+                                                rxPackage, uno::UNO_QUERY );
+
+        OSL_ENSURE( xPackagePropSet.is(),
+                    "Content::loadData - "
+                    "Got no XPropertySet interface from package!" );
+
+        if ( xPackagePropSet.is() )
+        {
+            // HasEncryptedEntries (only available at root folder)
+            try
+            {
+                uno::Any aHasEncryptedEntries
+                    = xPackagePropSet->getPropertyValue( "HasEncryptedEntries" );
+                if ( !( aHasEncryptedEntries >>= rProps.bHasEncryptedEntries ) )
+                {
+                    OSL_FAIL( "Content::loadData - "
+                                "Got no HasEncryptedEntries value!" );
+                    return false;
+                }
+            }
+            catch ( beans::UnknownPropertyException const & )
+            {
+                OSL_FAIL( "Content::loadData - "
+                            "Got no HasEncryptedEntries value!" );
+                return false;
+            }
+            catch ( lang::WrappedTargetException const & )
+            {
+                OSL_FAIL( "Content::loadData - "
+                            "Got no HasEncryptedEntries value!" );
+                return false;
+            }
+        }
+    }
+
+    if ( !rxPackage->hasByHierarchicalName( rURI.getPath() ) )
+        return false;
+
+    try
+    {
+        uno::Any aEntry = rxPackage->getByHierarchicalName( rURI.getPath() );
+        if ( aEntry.hasValue() )
+        {
+            uno::Reference< beans::XPropertySet > xPropSet;
+            aEntry >>= xPropSet;
+
+            if ( !xPropSet.is() )
+            {
+                OSL_FAIL( "Content::loadData - Got no XPropertySet interface!" );
+                return false;
+            }
+
+            // Title
+            rProps.aTitle = rURI.getName();
+
+            // MediaType
+            try
+            {
+                uno::Any aMediaType = xPropSet->getPropertyValue("MediaType");
+                if ( !( aMediaType >>= rProps.aMediaType ) )
+                {
+                    OSL_FAIL( "Content::loadData - Got no MediaType value!" );
+                    return false;
+                }
+            }
+            catch ( beans::UnknownPropertyException const & )
+            {
+                OSL_FAIL( "Content::loadData - Got no MediaType value!" );
+                return false;
+            }
+            catch ( lang::WrappedTargetException const & )
+            {
+                OSL_FAIL( "Content::loadData - Got no MediaType value!" );
+                return false;
+            }
+
+            uno::Reference< container::XEnumerationAccess > xEnumAccess;
+            aEntry >>= xEnumAccess;
+
+            // ContentType / IsFolder / IsDocument
+            if ( xEnumAccess.is() )
+            {
+                // folder
+                rProps.aContentType = getContentType( rURI.getScheme(), true );
+                rProps.bIsDocument = false;
+                rProps.bIsFolder = true;
+            }
+            else
+            {
+                // stream
+                rProps.aContentType = getContentType( rURI.getScheme(), false );
+                rProps.bIsDocument = true;
+                rProps.bIsFolder = false;
+            }
+
+            if ( rProps.bIsDocument )
+            {
+                // Size ( only available for streams )
+                try
+                {
+                    uno::Any aSize = xPropSet->getPropertyValue("Size");
+                    if ( !( aSize >>= rProps.nSize ) )
+                    {
+                        OSL_FAIL( "Content::loadData - Got no Size value!" );
+                        return false;
+                    }
+                }
+                catch ( beans::UnknownPropertyException const & )
+                {
+                    OSL_FAIL( "Content::loadData - Got no Size value!" );
+                    return false;
+                }
+                catch ( lang::WrappedTargetException const & )
+                {
+                    OSL_FAIL( "Content::loadData - Got no Size value!" );
+                    return false;
+                }
+
+                // Compressed ( only available for streams )
+                try
+                {
+                    uno::Any aCompressed = xPropSet->getPropertyValue("Compressed");
+                    if ( !( aCompressed >>= rProps.bCompressed ) )
+                    {
+                        OSL_FAIL( "Content::loadData - Got no Compressed value!" );
+                        return false;
+                    }
+                }
+                catch ( beans::UnknownPropertyException const & )
+                {
+                    OSL_FAIL( "Content::loadData - Got no Compressed value!" );
+                    return false;
+                }
+                catch ( lang::WrappedTargetException const & )
+                {
+                    OSL_FAIL( "Content::loadData - Got no Compressed value!" );
+                    return false;
+                }
+
+                // Encrypted ( only available for streams )
+                try
+                {
+                    uno::Any aEncrypted = xPropSet->getPropertyValue("Encrypted");
+                    if ( !( aEncrypted >>= rProps.bEncrypted ) )
+                    {
+                        OSL_FAIL( "Content::loadData - Got no Encrypted value!" );
+                        return false;
+                    }
+                }
+                catch ( beans::UnknownPropertyException const & )
+                {
+                    OSL_FAIL( "Content::loadData - Got no Encrypted value!" );
+                    return false;
+                }
+                catch ( lang::WrappedTargetException const & )
+                {
+                    OSL_FAIL( "Content::loadData - Got no Encrypted value!" );
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName
+    }
+
+    return false;
+}
+
+
+void Content::renameData(
+            const uno::Reference< ucb::XContentIdentifier >& xOldId,
+            const uno::Reference< ucb::XContentIdentifier >& xNewId )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    PackageUri aURI( xOldId->getContentIdentifier() );
+    uno::Reference< container::XHierarchicalNameAccess > xNA = getPackage(
+                                                                        aURI );
+
+    if ( !xNA->hasByHierarchicalName( aURI.getPath() ) )
+        return;
+
+    try
+    {
+        uno::Any aEntry = xNA->getByHierarchicalName( aURI.getPath() );
+        uno::Reference< container::XNamed > xNamed;
+        aEntry >>= xNamed;
+
+        if ( !xNamed.is() )
+        {
+            OSL_FAIL( "Content::renameData - Got no XNamed interface!" );
+            return;
+        }
+
+        PackageUri aNewURI( xNewId->getContentIdentifier() );
+
+        // No success indicator!? No return value / exceptions specified.
+        xNamed->setName( aNewURI.getName() );
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName
+    }
+}
+
+
+bool Content::storeData( const uno::Reference< io::XInputStream >& xStream )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< container::XHierarchicalNameAccess > xNA = getPackage();
+
+    uno::Reference< beans::XPropertySet > xPackagePropSet(
+                                                    xNA, uno::UNO_QUERY );
+    OSL_ENSURE( xPackagePropSet.is(),
+                "Content::storeData - "
+                "Got no XPropertySet interface from package!" );
+
+    if ( !xPackagePropSet.is() )
+        return false;
+
+    if ( m_nModifiedProps & ENCRYPTIONKEY_MODIFIED )
+    {
+        if ( m_aUri.isRootFolder() )
+        {
+            // Property available only from package and from streams (see below)
+            try
+            {
+                xPackagePropSet->setPropertyValue(
+                        "EncryptionKey",
+                        uno::Any( m_aProps.aEncryptionKey ) );
+                m_nModifiedProps &= ~ENCRYPTIONKEY_MODIFIED;
+            }
+            catch ( beans::UnknownPropertyException const & )
+            {
+                // setPropertyValue
+            }
+            catch ( beans::PropertyVetoException const & )
+            {
+                // setPropertyValue
+            }
+            catch ( lang::IllegalArgumentException const & )
+            {
+                // setPropertyValue
+            }
+            catch ( lang::WrappedTargetException const & )
+            {
+                // setPropertyValue
+            }
+        }
+    }
+
+    if ( !xNA->hasByHierarchicalName( m_aUri.getPath() ) )
+    {
+//        if ( !bCreate )
+//            return sal_True;
+
+        try
+        {
+            // Create new resource...
+            uno::Reference< lang::XSingleServiceFactory > xFac(
+                                                    xNA, uno::UNO_QUERY );
+            if ( !xFac.is() )
+            {
+                OSL_FAIL( "Content::storeData - "
+                            "Got no XSingleServiceFactory interface!" );
+                return false;
+            }
+
+            uno::Sequence< uno::Any > aArgs{ uno::Any(isFolder()) };
+
+            uno::Reference< uno::XInterface > xNew
+                = xFac->createInstanceWithArguments( aArgs );
+
+            if ( !xNew.is() )
+            {
+                OSL_FAIL( "Content::storeData - createInstance failed!" );
+                return false;
+            }
+
+            PackageUri aParentUri( getParentURL() );
+            uno::Any aEntry
+                = xNA->getByHierarchicalName( aParentUri.getPath() );
+            uno::Reference< container::XNameContainer > xParentContainer;
+            aEntry >>= xParentContainer;
+
+            if ( !xParentContainer.is() )
+            {
+                OSL_FAIL( "Content::storeData - "
+                            "Got no XNameContainer interface!" );
+                return false;
+            }
+
+            xParentContainer->insertByName( m_aProps.aTitle,
+                                            uno::Any( xNew ) );
+        }
+        catch ( lang::IllegalArgumentException const & )
+        {
+            // insertByName
+            OSL_FAIL( "Content::storeData - insertByName failed!" );
+            return false;
+        }
+        catch ( uno::RuntimeException const & )
+        {
+            throw;
+        }
+        catch ( container::ElementExistException const & )
+        {
+            // insertByName
+            OSL_FAIL( "Content::storeData - insertByName failed!" );
+            return false;
+        }
+        catch ( lang::WrappedTargetException const & )
+        {
+            // insertByName
+            OSL_FAIL( "Content::storeData - insertByName failed!" );
+            return false;
+        }
+        catch ( container::NoSuchElementException const & )
+        {
+            // getByHierarchicalName
+            OSL_FAIL( "Content::storeData - getByHierarchicalName failed!" );
+            return false;
+        }
+        catch ( uno::Exception const & )
+        {
+            // createInstanceWithArguments
+            OSL_FAIL( "Content::storeData - Error!" );
+            return false;
+        }
+    }
+
+    if ( !xNA->hasByHierarchicalName( m_aUri.getPath() ) )
+        return false;
+
+    try
+    {
+        uno::Reference< beans::XPropertySet > xPropSet;
+        xNA->getByHierarchicalName( m_aUri.getPath() ) >>= xPropSet;
+
+        if ( !xPropSet.is() )
+        {
+            OSL_FAIL( "Content::storeData - Got no XPropertySet interface!" );
+            return false;
+        }
+
+
+        // Store property values...
+
+
+        if ( m_nModifiedProps & MEDIATYPE_MODIFIED )
+        {
+            xPropSet->setPropertyValue(
+                                "MediaType",
+                                uno::Any( m_aProps.aMediaType ) );
+            m_nModifiedProps &= ~MEDIATYPE_MODIFIED;
+        }
+
+        if ( m_nModifiedProps & COMPRESSED_MODIFIED )
+        {
+            if ( !isFolder() )
+                xPropSet->setPropertyValue(
+                                "Compressed",
+                                uno::Any( m_aProps.bCompressed ) );
+
+            m_nModifiedProps &= ~COMPRESSED_MODIFIED;
+        }
+
+        if ( m_nModifiedProps & ENCRYPTED_MODIFIED )
+        {
+            if ( !isFolder() )
+                xPropSet->setPropertyValue(
+                                "Encrypted",
+                                uno::Any( m_aProps.bEncrypted ) );
+
+            m_nModifiedProps &= ~ENCRYPTED_MODIFIED;
+        }
+
+        if ( m_nModifiedProps & ENCRYPTIONKEY_MODIFIED )
+        {
+            if ( !isFolder() )
+                xPropSet->setPropertyValue(
+                            "EncryptionKey",
+                            uno::Any( m_aProps.aEncryptionKey ) );
+
+            m_nModifiedProps &= ~ENCRYPTIONKEY_MODIFIED;
+        }
+
+
+        // Store data stream...
+
+
+        if ( xStream.is() && !isFolder() )
+        {
+            uno::Reference< io::XActiveDataSink > xSink(
+                                                xPropSet, uno::UNO_QUERY );
+
+            if ( !xSink.is() )
+            {
+                OSL_FAIL( "Content::storeData - "
+                            "Got no XActiveDataSink interface!" );
+                return false;
+            }
+
+            xSink->setInputStream( xStream );
+        }
+
+        return true;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName
+    }
+    catch ( beans::UnknownPropertyException const & )
+    {
+        // setPropertyValue
+    }
+    catch ( beans::PropertyVetoException const & )
+    {
+        // setPropertyValue
+    }
+    catch ( lang::IllegalArgumentException const & )
+    {
+        // setPropertyValue
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        // setPropertyValue
+    }
+
+    OSL_FAIL( "Content::storeData - Error!" );
+    return false;
+}
+
+
+bool Content::removeData()
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< container::XHierarchicalNameAccess > xNA = getPackage();
+
+    PackageUri aParentUri( getParentURL() );
+    if ( !xNA->hasByHierarchicalName( aParentUri.getPath() ) )
+        return false;
+
+    try
+    {
+        uno::Any aEntry = xNA->getByHierarchicalName( aParentUri.getPath() );
+        uno::Reference< container::XNameContainer > xContainer;
+        aEntry >>= xContainer;
+
+        if ( !xContainer.is() )
+        {
+            OSL_FAIL( "Content::removeData - "
+                        "Got no XNameContainer interface!" );
+            return false;
+        }
+
+        xContainer->removeByName( m_aUri.getName() );
+        return true;
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName, removeByName
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+        // removeByName
+    }
+
+    OSL_FAIL( "Content::removeData - Error!" );
+    return false;
+}
+
+
+bool Content::flushData()
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    // Note: XChangesBatch is only implemented by the package itself, not
+    //       by the single entries. Maybe this has to change...
+
+    uno::Reference< container::XHierarchicalNameAccess > xNA = getPackage();
+
+    uno::Reference< util::XChangesBatch > xBatch( xNA, uno::UNO_QUERY );
+    if ( !xBatch.is() )
+    {
+        OSL_FAIL( "Content::flushData - Got no XChangesBatch interface!" );
+        return false;
+    }
+
+    try
+    {
+        xBatch->commitChanges();
+        return true;
+    }
+    catch ( lang::WrappedTargetException const & )
+    {
+    }
+
+    OSL_FAIL( "Content::flushData - Error!" );
+    return false;
+}
+
+
+uno::Reference< io::XInputStream > Content::getInputStream()
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< io::XInputStream > xStream;
+    uno::Reference< container::XHierarchicalNameAccess > xNA = getPackage();
+
+    if ( !xNA->hasByHierarchicalName( m_aUri.getPath() ) )
+        return xStream;
+
+    try
+    {
+        uno::Any aEntry = xNA->getByHierarchicalName( m_aUri.getPath() );
+        uno::Reference< io::XActiveDataSink > xSink;
+        aEntry >>= xSink;
+
+        if ( !xSink.is() )
+        {
+            OSL_FAIL( "Content::getInputStream - "
+                        "Got no XActiveDataSink interface!" );
+            return xStream;
+        }
+
+        xStream = xSink->getInputStream();
+
+        OSL_ENSURE( xStream.is(),
+                    "Content::getInputStream - Got no stream!" );
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName
+    }
+
+    return xStream;
+}
+
+
+uno::Reference< container::XEnumeration > Content::getIterator()
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< container::XEnumeration > xIter;
+    uno::Reference< container::XHierarchicalNameAccess > xNA = getPackage();
+
+    if ( !xNA->hasByHierarchicalName( m_aUri.getPath() ) )
+        return xIter;
+
+    try
+    {
+        uno::Any aEntry = xNA->getByHierarchicalName( m_aUri.getPath() );
+        uno::Reference< container::XEnumerationAccess > xIterFac;
+        aEntry >>= xIterFac;
+
+        if ( !xIterFac.is() )
+        {
+            OSL_FAIL( "Content::getIterator - "
+                        "Got no XEnumerationAccess interface!" );
+            return xIter;
+        }
+
+        xIter = xIterFac->createEnumeration();
+
+        OSL_ENSURE( xIter.is(),
+                    "Content::getIterator - Got no iterator!" );
+    }
+    catch ( container::NoSuchElementException const & )
+    {
+        // getByHierarchicalName
+    }
+
+    return xIter;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgcontent.hxx b/ucb/source/ucp/package/pkgcontent.hxx
new file mode 100644
index 0000000000..e1eebad50f
--- /dev/null
+++ b/ucb/source/ucp/package/pkgcontent.hxx
@@ -0,0 +1,276 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+#include <vector>
+#include <rtl/ref.hxx>
+
+#include <com/sun/star/ucb/XContentCreator.hpp>
+#include <ucbhelper/contenthelper.hxx>
+#include "pkguri.hxx"
+
+namespace com::sun::star {
+    namespace beans
+    {
+        struct Property;
+        struct PropertyValue;
+    }
+    namespace container
+    {
+        class XHierarchicalNameAccess;
+        class XEnumeration;
+    }
+    namespace io
+    {
+        class XInputStream;
+    }
+    namespace sdbc
+    {
+        class XRow;
+    }
+    namespace ucb
+    {
+        struct OpenCommandArgument2;
+        struct TransferInfo;
+    }
+}
+
+namespace package_ucp
+{
+
+
+struct ContentProperties
+{
+    OUString     aTitle;                // Title
+    OUString     aContentType;          // ContentType
+    bool         bIsDocument;           // IsDocument
+    bool         bIsFolder;             // IsFolder
+    OUString     aMediaType;            // MediaType
+    css::uno::Sequence < sal_Int8 >   aEncryptionKey;        // EncryptionKey
+    sal_Int64    nSize;                 // Size
+    bool         bCompressed;           // Compressed
+    bool         bEncrypted;            // Encrypted
+    bool         bHasEncryptedEntries;  // HasEncryptedEntries
+
+    ContentProperties()
+    : bIsDocument( true ), bIsFolder( false ), nSize( 0 ),
+      bCompressed( true ), bEncrypted( false ),
+      bHasEncryptedEntries( false ) {}
+
+    explicit ContentProperties( const OUString& rContentType );
+
+    css::uno::Sequence< css::ucb::ContentInfo >
+    getCreatableContentsInfo( PackageUri const & rUri ) const;
+};
+
+
+class ContentProvider;
+
+class Content : public ::ucbhelper::ContentImplHelper,
+                public css::ucb::XContentCreator
+{
+    enum ContentState { TRANSIENT,  // created via CreateNewContent,
+                                        // but did not process "insert" yet
+                        PERSISTENT, // processed "insert"
+                        DEAD        // processed "delete"
+                      };
+
+    PackageUri              m_aUri;
+    ContentProperties       m_aProps;
+    ContentState            m_eState;
+    css::uno::Reference<
+        css::container::XHierarchicalNameAccess > m_xPackage;
+    ContentProvider*        m_pProvider;
+    sal_uInt32              m_nModifiedProps;
+
+private:
+    Content( const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+             ContentProvider* pProvider,
+             const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+             css::uno::Reference< css::container::XHierarchicalNameAccess > Package,
+             PackageUri aUri,
+             ContentProperties  aProps );
+    Content( const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+             ContentProvider* pProvider,
+             const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+             css::uno::Reference< css::container::XHierarchicalNameAccess > Package,
+             PackageUri aUri,
+             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 css::uno::Reference< css::sdbc::XRow >
+    getPropertyValues( const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                       const css::uno::Sequence< css::beans::Property >& rProperties,
+                       const ContentProperties& rData,
+                       const rtl::Reference< ::ucbhelper::ContentProviderImplHelper >& rProvider,
+                       const OUString& rContentId );
+
+    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 );
+
+    css::uno::Reference< css::container::XHierarchicalNameAccess >
+    getPackage( const PackageUri& rURI );
+    css::uno::Reference< css::container::XHierarchicalNameAccess >
+    getPackage();
+
+    static bool
+    loadData( ContentProvider* pProvider,
+              const PackageUri& rURI,
+              ContentProperties& rProps,
+              css::uno::Reference< css::container::XHierarchicalNameAccess > & rxPackage );
+    static bool
+    hasData( ContentProvider* pProvider,
+             const PackageUri& rURI,
+             css::uno::Reference< css::container::XHierarchicalNameAccess > & rxPackage );
+
+    bool
+    hasData( const PackageUri& rURI );
+    void
+    renameData( const css::uno::Reference< css::ucb::XContentIdentifier >& xOldId,
+                const css::uno::Reference< css::ucb::XContentIdentifier >& xNewId );
+    bool
+    storeData( const css::uno::Reference< css::io::XInputStream >& xStream );
+    bool
+    removeData();
+
+    bool
+    flushData();
+
+    typedef rtl::Reference< Content > ContentRef;
+    typedef std::vector< ContentRef > ContentRefList;
+    void queryChildren( ContentRefList& rChildren );
+
+    bool
+    exchangeIdentity( const css::uno::Reference<
+                        css::ucb::XContentIdentifier >& xNewId );
+
+    /// @throws css::uno::Exception
+    css::uno::Any
+    open( const css::ucb::OpenCommandArgument2& rArg,
+          const css::uno::Reference< css::ucb::XCommandEnvironment > & xEnv );
+
+    /// @throws css::uno::Exception
+    void insert( const css::uno::Reference< css::io::XInputStream >& xStream,
+                 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 );
+
+    css::uno::Reference< css::io::XInputStream >
+    getInputStream();
+
+    bool isFolder() const { return m_aProps.bIsFolder; }
+
+public:
+    // Create existing content. Fail, if not already exists.
+    static rtl::Reference<Content> create(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            ContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier );
+
+    // Create new content. Fail, if already exists.
+    static rtl::Reference<Content> create(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            ContentProvider* pProvider,
+            const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier,
+            const css::ucb::ContentInfo& Info );
+
+    virtual ~Content() 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;
+
+    // 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.
+
+
+    // Called from resultset data supplier.
+    static css::uno::Reference< css::sdbc::XRow >
+    getPropertyValues( const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                       const css::uno::Sequence< css::beans::Property >& rProperties,
+                       ContentProvider* pProvider,
+                       const OUString& rContentId );
+
+    // Called from resultset data supplier.
+    css::uno::Reference< css::container::XEnumeration >
+    getIterator();
+
+    static OUString
+    getContentType( std::u16string_view aScheme,  bool bFolder );
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgcontentcaps.cxx b/ucb/source/ucp/package/pkgcontentcaps.cxx
new file mode 100644
index 0000000000..c01201d10a
--- /dev/null
+++ b/ucb/source/ucp/package/pkgcontentcaps.cxx
@@ -0,0 +1,504 @@
+/* -*- 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:
+
+                        rootfolder folder  stream
+    ---------------------------------------------
+    ContentType           r         r         r
+    IsDocument            r         r         r
+    IsFolder              r         r         r
+    MediaType            (w)       (w)        w
+    Title                 r         w         w
+    Size                  -         -         r
+    CreatableContentsInfo r         r         r
+    Compressed            -         -         w
+    Encrypted             -         -         w
+    HasEncryptedEntries   r         -         -
+
+    getCommandInfo        x         x         x
+    getPropertySetInfo    x         x         x
+    getPropertyValues     x         x         x
+    setPropertyValues     x         x         x
+    insert                -         x         x
+    delete                -         x         x
+    open                  x         x         x
+    transfer              x         x         -
+    flush                 x         x         -
+    createNewContent      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 "pkgcontent.hxx"
+
+using namespace com::sun::star;
+using namespace package_ucp;
+
+
+// Content 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
+//            Content::getPropertyValues(...) must be adapted too!
+
+
+// virtual
+uno::Sequence< beans::Property > Content::getProperties(
+            const uno::Reference< ucb::XCommandEnvironment > & /*xEnv*/ )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( isFolder() )
+    {
+        if ( m_aUri.isRootFolder() )
+        {
+
+
+            // Root Folder: Supported properties
+
+
+            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(
+                    "MediaType",
+                    -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
+
+                beans::Property(
+                    "HasEncryptedEntries",
+                    -1,
+                    cppu::UnoType<bool>::get(),
+                    beans::PropertyAttribute::BOUND
+                        | beans::PropertyAttribute::READONLY
+                )
+            };
+            return MAKEPROPSEQUENCE( aRootFolderPropertyInfoTable );
+        }
+        else
+        {
+
+
+            // Folder: Supported properties
+
+
+            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(
+                    "MediaType",
+                    -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( aFolderPropertyInfoTable );
+        }
+    }
+    else
+    {
+
+
+        // Stream: Supported properties
+
+
+        static const beans::Property aStreamPropertyInfoTable[] =
+        {
+
+            // 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(
+                "MediaType",
+                -1,
+                cppu::UnoType<OUString>::get(),
+                beans::PropertyAttribute::BOUND
+            ),
+            beans::Property(
+                "Size",
+                -1,
+                cppu::UnoType<sal_Int64>::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
+
+            beans::Property(
+                "Compressed",
+                -1,
+                cppu::UnoType<bool>::get(),
+                beans::PropertyAttribute::BOUND
+            ),
+            beans::Property(
+                "Encrypted",
+                -1,
+                cppu::UnoType<bool>::get(),
+                beans::PropertyAttribute::BOUND
+            )
+        };
+        return MAKEPROPSEQUENCE( aStreamPropertyInfoTable );
+    }
+}
+
+
+// virtual
+uno::Sequence< ucb::CommandInfo > Content::getCommands(
+            const uno::Reference< ucb::XCommandEnvironment > & /*xEnv*/ )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( isFolder() )
+    {
+        if ( m_aUri.isRootFolder() )
+        {
+
+
+            // Root Folder: Supported commands
+
+
+            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
+
+                ucb::CommandInfo(
+                    "flush",
+                    -1,
+                    cppu::UnoType<void>::get()
+                )
+            };
+
+            return MAKECMDSEQUENCE( aRootFolderCommandInfoTable );
+        }
+        else
+        {
+
+
+            // Folder: Supported commands
+
+
+            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
+
+                ucb::CommandInfo(
+                    "flush",
+                    -1,
+                    cppu::UnoType<void>::get()
+                )
+            };
+
+            return MAKECMDSEQUENCE( aFolderCommandInfoTable );
+        }
+    }
+    else
+    {
+
+
+        // Stream: Supported commands
+
+
+        static const ucb::CommandInfo aStreamCommandInfoTable[] =
+        {
+
+            // 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()
+            )
+
+            // New commands
+
+        };
+
+        return MAKECMDSEQUENCE( aStreamCommandInfoTable );
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgdatasupplier.cxx b/ucb/source/ucp/package/pkgdatasupplier.cxx
new file mode 100644
index 0000000000..436f7023d3
--- /dev/null
+++ b/ucb/source/ucp/package/pkgdatasupplier.cxx
@@ -0,0 +1,425 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ *************************************************************************/
+
+#include <osl/diagnose.h>
+#include <com/sun/star/container/XNamed.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/ucb/ResultSetException.hpp>
+#include <ucbhelper/contentidentifier.hxx>
+#include <ucbhelper/providerhelper.hxx>
+#include <utility>
+#include "pkgdatasupplier.hxx"
+#include "pkgcontent.hxx"
+#include "pkgprovider.hxx"
+
+#include "../inc/urihelper.hxx"
+
+using namespace com::sun::star;
+using namespace package_ucp;
+
+// DataSupplier Implementation.
+
+
+DataSupplier::DataSupplier(
+                uno::Reference< uno::XComponentContext > xContext,
+                const rtl::Reference< Content >& rContent )
+: m_xContent( rContent ), m_xContext(std::move( xContext )),
+  m_xFolderEnum( rContent->getIterator() ),
+  m_bCountFinal( !m_xFolderEnum.is() ), m_bThrowException( m_bCountFinal )
+{
+}
+
+
+// virtual
+DataSupplier::~DataSupplier()
+{
+}
+
+
+// virtual
+OUString DataSupplier::queryContentIdentifierString( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+    return queryContentIdentifierStringImpl(aGuard, nIndex);
+}
+
+OUString DataSupplier::queryContentIdentifierStringImpl( std::unique_lock<std::mutex>& rGuard, sal_uInt32 nIndex )
+{
+    if ( nIndex < m_aResults.size() )
+    {
+        OUString aId = m_aResults[ nIndex ].aURL;
+        if ( !aId.isEmpty() )
+        {
+            // Already cached.
+            return aId;
+        }
+    }
+
+    if ( getResultImpl( rGuard, nIndex ) )
+    {
+        // Note: getResult fills m_aResults[ nIndex ].aURL.
+        return m_aResults[ nIndex ].aURL;
+    }
+    return OUString();
+}
+
+
+// virtual
+uno::Reference< ucb::XContentIdentifier >
+DataSupplier::queryContentIdentifier( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+    return queryContentIdentifierImpl(aGuard, nIndex);
+}
+
+uno::Reference< ucb::XContentIdentifier >
+DataSupplier::queryContentIdentifierImpl( std::unique_lock<std::mutex>& rGuard, sal_uInt32 nIndex )
+{
+    if ( nIndex < m_aResults.size() )
+    {
+        uno::Reference< ucb::XContentIdentifier >& xId
+                                = m_aResults[ nIndex ].xId;
+        if ( xId.is() )
+        {
+            // Already cached.
+            return xId;
+        }
+    }
+
+    OUString aId = queryContentIdentifierStringImpl( rGuard, 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 > DataSupplier::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
+        = queryContentIdentifierImpl( aGuard, 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 DataSupplier::getResult( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+    return getResultImpl(aGuard, nIndex);
+}
+
+bool DataSupplier::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_xFolderEnum->hasMoreElements() )
+    {
+        try
+        {
+            uno::Reference< container::XNamed > xNamed;
+            m_xFolderEnum->nextElement() >>= xNamed;
+
+            if ( !xNamed.is() )
+            {
+                OSL_FAIL( "DataSupplier::getResult - Got no XNamed!" );
+                break;
+            }
+
+            OUString aName = xNamed->getName();
+
+            if ( aName.isEmpty() )
+            {
+                OSL_FAIL( "DataSupplier::getResult - Empty name!" );
+                break;
+            }
+
+            // Assemble URL for child.
+            OUString aURL = assembleChildURL( aName );
+
+            m_aResults.push_back( ResultListEntry( aURL ) );
+
+            if ( nPos == nIndex )
+            {
+                // Result obtained.
+                bFound = true;
+                break;
+            }
+
+            nPos++;
+        }
+        catch ( container::NoSuchElementException const & )
+        {
+            m_bThrowException = true;
+            break;
+        }
+        catch ( lang::WrappedTargetException const & )
+        {
+            m_bThrowException = true;
+            break;
+        }
+    }
+
+    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 DataSupplier::totalCount()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( m_bCountFinal )
+        return m_aResults.size();
+
+    sal_uInt32 nOldCount = m_aResults.size();
+
+    while ( m_xFolderEnum->hasMoreElements() )
+    {
+        try
+        {
+            uno::Reference< container::XNamed > xNamed;
+            m_xFolderEnum->nextElement() >>= xNamed;
+
+            if ( !xNamed.is() )
+            {
+                OSL_FAIL( "DataSupplier::getResult - Got no XNamed!" );
+                break;
+            }
+
+            OUString aName = xNamed->getName();
+
+            if ( aName.isEmpty() )
+            {
+                OSL_FAIL( "DataSupplier::getResult - Empty name!" );
+                break;
+            }
+
+            // Assemble URL for child.
+            OUString aURL = assembleChildURL( aName );
+
+            m_aResults.push_back( ResultListEntry( aURL ) );
+        }
+        catch ( container::NoSuchElementException const & )
+        {
+            m_bThrowException = true;
+            break;
+        }
+        catch ( lang::WrappedTargetException const & )
+        {
+            m_bThrowException = true;
+            break;
+        }
+    }
+
+    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 DataSupplier::currentCount()
+{
+    return m_aResults.size();
+}
+
+
+// virtual
+bool DataSupplier::isCountFinal()
+{
+    return m_bCountFinal;
+}
+
+
+// virtual
+uno::Reference< sdbc::XRow > DataSupplier::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 ) )
+    {
+        uno::Reference< sdbc::XRow > xRow = Content::getPropertyValues(
+                        m_xContext,
+                        getResultSet()->getProperties(),
+                        static_cast< ContentProvider * >(
+                            m_xContent->getProvider().get() ),
+                        queryContentIdentifierStringImpl( aGuard, nIndex ) );
+        m_aResults[ nIndex ].xRow = xRow;
+        return xRow;
+    }
+
+    return uno::Reference< sdbc::XRow >();
+}
+
+
+// virtual
+void DataSupplier::releasePropertyValues( sal_uInt32 nIndex )
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( nIndex < m_aResults.size() )
+        m_aResults[ nIndex ].xRow.clear();
+}
+
+
+// virtual
+void DataSupplier::close()
+{
+}
+
+
+// virtual
+void DataSupplier::validate()
+{
+    if ( m_bThrowException )
+        throw ucb::ResultSetException();
+}
+
+
+OUString DataSupplier::assembleChildURL( const OUString& aName )
+{
+    OUString aURL;
+    OUString aContURL
+        = m_xContent->getIdentifier()->getContentIdentifier();
+    sal_Int32 nParam = aContURL.indexOf( '?' );
+    if ( nParam >= 0 )
+    {
+        aURL = aContURL.copy( 0, nParam );
+
+        sal_Int32 nPackageUrlEnd = aURL.lastIndexOf( '/' );
+        if ( nPackageUrlEnd != aURL.getLength() - 1 )
+            aURL += "/";
+
+        aURL += ::ucb_impl::urihelper::encodeSegment( aName ) +
+            aContURL.subView( nParam );
+    }
+    else
+    {
+        aURL = aContURL;
+
+        sal_Int32 nPackageUrlEnd = aURL.lastIndexOf( '/' );
+        if ( nPackageUrlEnd != aURL.getLength() - 1 )
+            aURL += "/";
+
+        aURL += ::ucb_impl::urihelper::encodeSegment( aName );
+    }
+    return aURL;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgdatasupplier.hxx b/ucb/source/ucp/package/pkgdatasupplier.hxx
new file mode 100644
index 0000000000..1872ef26e4
--- /dev/null
+++ b/ucb/source/ucp/package/pkgdatasupplier.hxx
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file 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 <com/sun/star/container/XEnumeration.hpp>
+#include <mutex>
+#include <utility>
+#include <vector>
+
+namespace package_ucp {
+
+class Content;
+
+class DataSupplier : public ::ucbhelper::ResultSetDataSupplier
+{
+public:
+    DataSupplier( css::uno::Reference< css::uno::XComponentContext > xContext,
+                  const rtl::Reference< Content >& rContent );
+    virtual ~DataSupplier() override;
+
+    virtual OUString queryContentIdentifierString( sal_uInt32 nIndex ) 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 ) 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;
+
+    OUString assembleChildURL( const OUString& aName );
+
+private:
+    bool getResultImpl( std::unique_lock<std::mutex>&, sal_uInt32 nIndex );
+    OUString queryContentIdentifierStringImpl( std::unique_lock<std::mutex>&, sal_uInt32 nIndex );
+    css::uno::Reference< css::ucb::XContentIdentifier > queryContentIdentifierImpl( std::unique_lock<std::mutex>&, sal_uInt32 nIndex );
+
+    struct ResultListEntry
+    {
+        OUString                                  aURL;
+        css::uno::Reference< css::ucb::XContentIdentifier > xId;
+        css::uno::Reference< css::ucb::XContent >           xContent;
+        css::uno::Reference< css::sdbc::XRow >              xRow;
+
+        explicit ResultListEntry(OUString _aURL ) : aURL(std::move( _aURL )) {}
+    };
+    std::mutex                                   m_aMutex;
+    std::vector< ResultListEntry >               m_aResults;
+    rtl::Reference< Content >                    m_xContent;
+    css::uno::Reference< css::uno::XComponentContext >     m_xContext;
+    css::uno::Reference< css::container::XEnumeration >    m_xFolderEnum;
+    bool                                     m_bCountFinal;
+    bool                                     m_bThrowException;
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgprovider.cxx b/ucb/source/ucp/package/pkgprovider.cxx
new file mode 100644
index 0000000000..636ecb3333
--- /dev/null
+++ b/ucb/source/ucp/package/pkgprovider.cxx
@@ -0,0 +1,272 @@
+/* -*- 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 <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <ucbhelper/contentidentifier.hxx>
+#include <ucbhelper/macros.hxx>
+#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
+#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include "pkgprovider.hxx"
+#include "pkgcontent.hxx"
+#include "pkguri.hxx"
+#include <unordered_map>
+#include <utility>
+
+using namespace com::sun::star;
+
+namespace package_ucp
+{
+
+
+
+namespace {
+
+class Package : public cppu::OWeakObject,
+                public container::XHierarchicalNameAccess
+{
+    friend ContentProvider;
+
+    OUString                                             m_aName;
+    uno::Reference< container::XHierarchicalNameAccess > m_xNA;
+    ContentProvider*                                     m_pOwner;
+
+public:
+    Package( OUString aName,
+             uno::Reference< container::XHierarchicalNameAccess > xNA,
+             ContentProvider* pOwner )
+    : m_aName(std::move( aName )), m_xNA(std::move( xNA )), m_pOwner( pOwner ) {}
+    virtual ~Package() override { m_pOwner->removePackage( m_aName ); }
+
+    // XInterface
+    virtual uno::Any SAL_CALL
+    queryInterface( const uno::Type& aType ) override
+    { return m_xNA->queryInterface( aType ); }
+    virtual void SAL_CALL
+    acquire() noexcept override
+    { OWeakObject::acquire(); }
+    virtual void SAL_CALL
+    release() noexcept override
+    { OWeakObject::release(); }
+
+    // XHierarchicalNameAccess
+    virtual uno::Any SAL_CALL
+    getByHierarchicalName( const OUString& aName ) override
+    { return m_xNA->getByHierarchicalName( aName ); }
+    virtual sal_Bool SAL_CALL
+    hasByHierarchicalName( const OUString& aName ) override
+    { return m_xNA->hasByHierarchicalName( aName ); }
+};
+
+}
+
+class Packages : public std::unordered_map<OUString, Package*> {};
+
+}
+
+using namespace package_ucp;
+
+
+// ContentProvider Implementation.
+ContentProvider::ContentProvider(
+            const uno::Reference< uno::XComponentContext >& rxContext )
+: ::ucbhelper::ContentProviderImplHelper( rxContext )
+{
+}
+
+
+// virtual
+ContentProvider::~ContentProvider()
+{
+}
+
+// XInterface methods.
+void SAL_CALL ContentProvider::acquire()
+    noexcept
+{
+    OWeakObject::acquire();
+}
+
+void SAL_CALL ContentProvider::release()
+    noexcept
+{
+    OWeakObject::release();
+}
+
+css::uno::Any SAL_CALL ContentProvider::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)
+                                               );
+    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
+}
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_IMPL_3( ContentProvider,
+                      lang::XTypeProvider,
+                      lang::XServiceInfo,
+                      ucb::XContentProvider );
+
+
+// XServiceInfo methods.
+
+OUString
+ContentProvider::getImplementationName()
+{
+    return "com.sun.star.comp.ucb.PackageContentProvider";
+}
+
+sal_Bool
+ContentProvider::supportsService(const OUString& s)
+{
+    return cppu::supportsService(this, s);
+}
+
+css::uno::Sequence< OUString >
+ContentProvider::getSupportedServiceNames()
+{
+    return { "com.sun.star.ucb.PackageContentProvider" };
+}
+
+
+// XContentProvider methods.
+
+
+// virtual
+uno::Reference< ucb::XContent > SAL_CALL ContentProvider::queryContent(
+            const uno::Reference< ucb::XContentIdentifier >& Identifier )
+{
+    if ( !Identifier.is() )
+        return uno::Reference< ucb::XContent >();
+
+    PackageUri aUri( Identifier->getContentIdentifier() );
+    if ( !aUri.isValid() )
+        throw ucb::IllegalIdentifierException();
+
+    // Create a new identifier for the normalized URL returned by
+    // PackageUri::getUri().
+    uno::Reference< ucb::XContentIdentifier > xId = new ::ucbhelper::ContentIdentifier( aUri.getUri() );
+
+    osl::MutexGuard aGuard( m_aMutex );
+
+    // Check, if a content with given id already exists...
+    uno::Reference< ucb::XContent > xContent
+        = queryExistingContent( xId );
+    if ( xContent.is() )
+        return xContent;
+
+    // Create a new content.
+
+    xContent = Content::create( m_xContext, this, Identifier ); // not xId!!!
+    registerNewContent( xContent );
+
+    if ( xContent.is() && !xContent->getIdentifier().is() )
+        throw ucb::IllegalIdentifierException();
+
+    return xContent;
+}
+
+
+// Other methods.
+
+
+uno::Reference< container::XHierarchicalNameAccess >
+ContentProvider::createPackage( const PackageUri & rURI )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    OUString rURL = rURI.getPackage() + rURI.getParam();
+
+    if ( m_pPackages )
+    {
+        Packages::const_iterator it = m_pPackages->find( rURL );
+        if ( it != m_pPackages->end() )
+        {
+            // Already instantiated. Return package.
+            return (*it).second->m_xNA;
+        }
+    }
+    else
+        m_pPackages.reset( new Packages );
+
+    // Create new package...
+    uno::Sequence< uno::Any > aArguments{ uno::Any(rURL) };
+    uno::Reference< container::XHierarchicalNameAccess > xNameAccess;
+    try
+    {
+        xNameAccess.set(
+            m_xContext->getServiceManager()->createInstanceWithArgumentsAndContext(
+                "com.sun.star.packages.comp.ZipPackage",
+                aArguments, m_xContext ),
+            css::uno::UNO_QUERY_THROW );
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( uno::Exception const & e )
+    {
+        css::uno::Any anyEx = cppu::getCaughtException();
+        throw css::lang::WrappedTargetRuntimeException(
+            e.Message, e.Context, anyEx);
+    }
+
+    rtl::Reference< Package> xPackage = new Package( rURL, xNameAccess, this );
+    (*m_pPackages)[ rURL ] = xPackage.get();
+    return xPackage;
+}
+
+
+void ContentProvider::removePackage( const OUString & rName )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_pPackages )
+    {
+        Packages::iterator it = m_pPackages->find( rName );
+        if ( it != m_pPackages->end() )
+        {
+            m_pPackages->erase( it );
+            return;
+        }
+    }
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+ucb_package_ContentProvider_get_implementation(
+    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new ContentProvider(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgprovider.hxx b/ucb/source/ucp/package/pkgprovider.hxx
new file mode 100644
index 0000000000..37584e9734
--- /dev/null
+++ b/ucb/source/ucp/package/pkgprovider.hxx
@@ -0,0 +1,86 @@
+/* -*- 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 <memory>
+#include <ucbhelper/providerhelper.hxx>
+#include "pkguri.hxx"
+
+namespace com::sun::star::container {
+    class XHierarchicalNameAccess;
+}
+
+namespace package_ucp {
+
+
+// UCB Content Type.
+#define PACKAGE_FOLDER_CONTENT_TYPE \
+                "application/" PACKAGE_URL_SCHEME "-folder"
+#define PACKAGE_STREAM_CONTENT_TYPE \
+                "application/" PACKAGE_URL_SCHEME "-stream"
+#define PACKAGE_ZIP_FOLDER_CONTENT_TYPE \
+                "application/" PACKAGE_ZIP_URL_SCHEME "-folder"
+#define PACKAGE_ZIP_STREAM_CONTENT_TYPE \
+                "application/" PACKAGE_ZIP_URL_SCHEME "-stream"
+
+
+class Packages;
+
+class ContentProvider : public ::ucbhelper::ContentProviderImplHelper
+{
+    std::unique_ptr<Packages> m_pPackages;
+
+public:
+    explicit ContentProvider( const css::uno::Reference< css::uno::XComponentContext >& rxContext );
+    virtual ~ContentProvider() 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;
+
+
+    // Non-interface methods.
+
+
+    css::uno::Reference< css::container::XHierarchicalNameAccess >
+    createPackage( const PackageUri & rParam );
+    void
+    removePackage( const OUString & rName );
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgresultset.cxx b/ucb/source/ucp/package/pkgresultset.cxx
new file mode 100644
index 0000000000..967625e9d3
--- /dev/null
+++ b/ucb/source/ucp/package/pkgresultset.cxx
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+/**************************************************************************
+                                TODO
+ **************************************************************************
+
+ - This implementation is not a dynamic result set!!! It only implements
+   the necessary interfaces, but never recognizes/notifies changes!!!
+
+ *************************************************************************/
+#include <utility>
+
+#include "pkgdatasupplier.hxx"
+#include "pkgresultset.hxx"
+
+using namespace com::sun::star;
+
+using namespace package_ucp;
+
+
+// DynamicResultSet Implementation.
+
+
+DynamicResultSet::DynamicResultSet(
+              const uno::Reference< uno::XComponentContext >& rxContext,
+              rtl::Reference< Content > xContent,
+              const ucb::OpenCommandArgument2& rCommand,
+              uno::Reference< ucb::XCommandEnvironment > xEnv )
+: ResultSetImplHelper(rxContext, rCommand ),
+  m_xContent(std::move( xContent )),
+  m_xEnv(std::move( xEnv ))
+{
+}
+
+
+// Non-interface methods.
+
+
+void DynamicResultSet::initStatic()
+{
+    m_xResultSet1
+        = new ::ucbhelper::ResultSet( m_xContext,
+                                      m_aCommand.Properties,
+                                      new DataSupplier( m_xContext,
+                                                        m_xContent ),
+                                      m_xEnv );
+}
+
+
+void DynamicResultSet::initDynamic()
+{
+    m_xResultSet1
+        = new ::ucbhelper::ResultSet( m_xContext,
+                                      m_aCommand.Properties,
+                                      new DataSupplier( m_xContext,
+                                                        m_xContent ),
+                                      m_xEnv );
+    m_xResultSet2 = m_xResultSet1;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkgresultset.hxx b/ucb/source/ucp/package/pkgresultset.hxx
new file mode 100644
index 0000000000..c87a074233
--- /dev/null
+++ b/ucb/source/ucp/package/pkgresultset.hxx
@@ -0,0 +1,47 @@
+/* -*- 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 "pkgcontent.hxx"
+
+namespace package_ucp {
+
+class DynamicResultSet : public ::ucbhelper::ResultSetImplHelper
+{
+    rtl::Reference< Content > m_xContent;
+    css::uno::Reference< css::ucb::XCommandEnvironment > m_xEnv;
+
+private:
+    virtual void initStatic() override;
+    virtual void initDynamic() override;
+
+public:
+    DynamicResultSet(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+            rtl::Reference< Content > xContent,
+            const css::ucb::OpenCommandArgument2& rCommand,
+            css::uno::Reference< css::ucb::XCommandEnvironment > xEnv );
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/pkguri.cxx b/ucb/source/ucp/package/pkguri.cxx
new file mode 100644
index 0000000000..b1de54aa47
--- /dev/null
+++ b/ucb/source/ucp/package/pkguri.cxx
@@ -0,0 +1,234 @@
+/* -*- 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 <sal/config.h>
+
+#include <string_view>
+
+#include <comphelper/storagehelper.hxx>
+
+#include "../inc/urihelper.hxx"
+
+#include "pkguri.hxx"
+
+using namespace package_ucp;
+
+
+// PackageUri Implementation.
+
+
+static void normalize( OUString& rURL )
+{
+    sal_Int32 nPos = 0;
+    do
+    {
+        nPos = rURL.indexOf( '%', nPos );
+        if ( nPos != -1 )
+        {
+            if ( nPos < ( rURL.getLength() - 2 ) )
+            {
+                OUString aTmp = rURL.copy( nPos + 1, 2 );
+                rURL = rURL.replaceAt( nPos + 1, 2, aTmp.toAsciiUpperCase() );
+                nPos++;
+            }
+        }
+    }
+    while ( nPos != -1 );
+}
+
+
+void PackageUri::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_aPackage.clear();
+    m_aParentUri.clear();
+    m_aName.clear();
+    m_aParam.clear();
+    m_aScheme.clear();
+
+    // URI must match at least: <scheme>://<non_empty_url_to_file>
+    if ( m_aUri.getLength() < PACKAGE_URL_SCHEME_LENGTH + 4 )
+    {
+        // error, but remember that we did an init().
+        m_aPath = "/";
+        return;
+    }
+
+    // Scheme must be followed by '://'
+    if ( ( m_aUri[ PACKAGE_URL_SCHEME_LENGTH ] != ':' )
+         ||
+         ( m_aUri[ PACKAGE_URL_SCHEME_LENGTH + 1 ] != '/' )
+         ||
+         ( m_aUri[ PACKAGE_URL_SCHEME_LENGTH + 2 ] != '/' ) )
+    {
+        // error, but remember that we did an init().
+        m_aPath = "/";
+        return;
+    }
+
+    OUString aPureUri;
+    sal_Int32 nParam = m_aUri.indexOf( '?' );
+    if( nParam >= 0 )
+    {
+        m_aParam = m_aUri.copy( nParam );
+        aPureUri = m_aUri.copy( 0, nParam );
+    }
+    else
+        aPureUri = m_aUri;
+
+    // Scheme is case insensitive.
+    m_aScheme = aPureUri.copy(
+        0, PACKAGE_URL_SCHEME_LENGTH ).toAsciiLowerCase();
+
+    if ( m_aScheme == PACKAGE_URL_SCHEME || m_aScheme == PACKAGE_ZIP_URL_SCHEME )
+    {
+        if ( m_aScheme == PACKAGE_ZIP_URL_SCHEME )
+        {
+            m_aParam +=
+                ( !m_aParam.isEmpty()
+                  ? std::u16string_view( u"&purezip" )
+                  : std::u16string_view( u"?purezip" ) );
+        }
+
+        aPureUri = aPureUri.replaceAt( 0,
+                                       m_aScheme.getLength(),
+                                       m_aScheme );
+
+        sal_Int32 nStart = PACKAGE_URL_SCHEME_LENGTH + 3;
+        sal_Int32 nEnd   = aPureUri.lastIndexOf( '/' );
+        if ( nEnd == PACKAGE_URL_SCHEME_LENGTH + 3 )
+        {
+            // Only <scheme>:/// - Empty authority
+
+            // error, but remember that we did an init().
+            m_aPath = "/";
+            return;
+        }
+        else if ( nEnd == ( aPureUri.getLength() - 1 ) )
+        {
+            if ( aPureUri[ aPureUri.getLength() - 2 ] == '/' )
+            {
+                // Only <scheme>://// or <scheme>://<something>
+
+                // error, but remember that we did an init().
+                m_aPath = "/";
+                return;
+            }
+
+            // Remove trailing slash.
+            aPureUri = aPureUri.copy( 0, nEnd );
+        }
+
+
+        nEnd = aPureUri.indexOf( '/', nStart );
+        if ( nEnd == -1 )
+        {
+            // root folder.
+
+            OUString aNormPackage = aPureUri.copy( nStart );
+            normalize( aNormPackage );
+
+            aPureUri = aPureUri.replaceAt(
+                nStart, aPureUri.getLength() - nStart, aNormPackage );
+            m_aPackage
+                = ::ucb_impl::urihelper::decodeSegment( aNormPackage );
+            m_aPath = "/";
+            m_aUri = m_aUri.replaceAt( 0,
+                                       ( nParam >= 0 )
+                                       ? nParam
+                                       : m_aUri.getLength(), aPureUri );
+
+            sal_Int32 nLastSlash = m_aPackage.lastIndexOf( '/' );
+            if ( nLastSlash != -1 )
+                m_aName = ::ucb_impl::urihelper::decodeSegment(
+                    m_aPackage.copy( nLastSlash + 1 ) );
+            else
+                m_aName
+                    = ::ucb_impl::urihelper::decodeSegment( m_aPackage );
+        }
+        else
+        {
+            m_aPath = aPureUri.copy( nEnd + 1 );
+
+            // Unexpected sequences of characters:
+            // - empty path segments
+            // - encoded slashes
+            // - parent folder segments ".."
+            // - current folder segments "."
+            if ( m_aPath.indexOf( "//" ) != -1
+              || m_aPath.indexOf( "%2F" ) != -1
+              || m_aPath.indexOf( "%2f" ) != -1
+              || ::comphelper::OStorageHelper::PathHasSegment( m_aPath, u".." )
+              || ::comphelper::OStorageHelper::PathHasSegment( m_aPath, u"." ) )
+            {
+                // error, but remember that we did an init().
+                m_aPath = "/";
+                return;
+            }
+
+            OUString aNormPackage = aPureUri.copy( nStart, nEnd - nStart );
+            normalize( aNormPackage );
+
+            aPureUri = aPureUri.replaceAt(
+                nStart, nEnd - nStart, aNormPackage );
+            aPureUri = aPureUri.replaceAt(
+                nEnd + 1,
+                aPureUri.getLength() - nEnd - 1,
+                ::ucb_impl::urihelper::encodeURI( m_aPath ) );
+
+            m_aPackage
+                = ::ucb_impl::urihelper::decodeSegment( aNormPackage );
+            m_aPath = ::ucb_impl::urihelper::decodeSegment( m_aPath );
+            m_aUri = m_aUri.replaceAt( 0,
+                                       ( nParam >= 0 )
+                                       ? nParam
+                                       : m_aUri.getLength(), aPureUri );
+
+            sal_Int32 nLastSlash = aPureUri.lastIndexOf( '/' );
+            if ( nLastSlash != -1 )
+            {
+                m_aParentUri = aPureUri.copy( 0, nLastSlash );
+                m_aName = ::ucb_impl::urihelper::decodeSegment(
+                    aPureUri.copy( nLastSlash + 1 ) );
+            }
+        }
+
+        // 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/package/pkguri.hxx b/ucb/source/ucp/package/pkguri.hxx
new file mode 100644
index 0000000000..4583a1afc8
--- /dev/null
+++ b/ucb/source/ucp/package/pkguri.hxx
@@ -0,0 +1,89 @@
+/* -*- 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 <utility>
+
+namespace package_ucp {
+
+
+#define PACKAGE_URL_SCHEME          "vnd.sun.star.pkg"
+#define PACKAGE_ZIP_URL_SCHEME      "vnd.sun.star.zip"
+#define PACKAGE_URL_SCHEME_LENGTH   16
+
+
+class PackageUri
+{
+    mutable OUString m_aUri;
+    mutable OUString m_aParentUri;
+    mutable OUString m_aPackage;
+    mutable OUString m_aPath;
+    mutable OUString m_aName;
+    mutable OUString m_aParam;
+    mutable OUString m_aScheme;
+    mutable bool            m_bValid;
+
+private:
+    void init() const;
+
+public:
+    explicit PackageUri( OUString aPackageUri )
+    : m_aUri(std::move( aPackageUri )), m_bValid( false ) {}
+
+    bool isValid() const
+    { init(); return m_bValid; }
+
+    const OUString & getUri() const
+    { init(); return m_aUri; }
+
+    void setUri( const OUString & rPackageUri )
+    { m_aPath.clear(); m_aUri = rPackageUri; m_bValid = false; }
+
+    const OUString & getParentUri() const
+    { init(); return m_aParentUri; }
+
+    const OUString & getPackage() const
+    { init(); return m_aPackage; }
+
+    const OUString & getPath() const
+    { init(); return m_aPath; }
+
+    const OUString & getName() const
+    { init(); return m_aName; }
+
+    const OUString & getParam() const
+    { init(); return m_aParam; }
+
+    const OUString & getScheme() const
+    { init(); return m_aScheme; }
+
+    inline bool isRootFolder() const;
+};
+
+inline bool PackageUri::isRootFolder() const
+{
+    init();
+    return m_aPath == "/";
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/ucb/source/ucp/package/ucppkg1.component b/ucb/source/ucp/package/ucppkg1.component
new file mode 100644
index 0000000000..5bbf387a15
--- /dev/null
+++ b/ucb/source/ucp/package/ucppkg1.component
@@ -0,0 +1,26 @@
+<?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.PackageContentProvider"
+    constructor="ucb_package_ContentProvider_get_implementation" single-instance="true">
+    <service name="com.sun.star.ucb.PackageContentProvider"/>
+  </implementation>
+</component>