AOO410/main/svtools/source/misc/templatefoldercache.cxx

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svtools.hxx"
#include <svtools/templatefoldercache.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <unotools/localfilehelper.hxx>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/sdbc/XResultSet.hpp>
#include <com/sun/star/ucb/XDynamicResultSet.hpp>
#include <com/sun/star/sdbc/XRow.hpp>
#include <com/sun/star/ucb/XContentAccess.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/util/XOfficeInstallationDirectories.hpp>
#include <ucbhelper/content.hxx>
#include <vos/ref.hxx>
#include <vos/refernce.hxx>
#include <tools/urlobj.hxx>
#include <tools/debug.hxx>
#include <unotools/pathoptions.hxx>

#include "comphelper/processfactory.hxx"

#include <vector>
#include <list>
#include <functional>
#include <algorithm>

//.........................................................................
namespace svt
{
//.........................................................................

	using namespace ::utl;
	using namespace ::com::sun::star;
	using namespace ::com::sun::star::sdbc;
	using namespace ::com::sun::star::ucb;
	using namespace ::com::sun::star::uno;

	//=====================================================================
	//= helpers
	//=====================================================================
	//---------------------------------------------------------------------
	SvStream& operator << ( SvStream& _rStorage, const util::DateTime& _rDate )
	{
		_rStorage << _rDate.HundredthSeconds;
		_rStorage << _rDate.Seconds;
		_rStorage << _rDate.Minutes;
		_rStorage << _rDate.Hours;
		_rStorage << _rDate.Day;
		_rStorage << _rDate.Month;
		_rStorage << _rDate.Year;

		return _rStorage;
	}

	//---------------------------------------------------------------------
	SvStream& operator >> ( SvStream& _rStorage, util::DateTime& _rDate )
	{
		_rStorage >> _rDate.HundredthSeconds;
		_rStorage >> _rDate.Seconds;
		_rStorage >> _rDate.Minutes;
		_rStorage >> _rDate.Hours;
		_rStorage >> _rDate.Day;
		_rStorage >> _rDate.Month;
		_rStorage >> _rDate.Year;

		return _rStorage;
	}

	//---------------------------------------------------------------------
	sal_Bool operator == ( const util::DateTime& _rLHS, const util::DateTime& _rRHS )
	{
		return	_rLHS.HundredthSeconds == _rRHS.HundredthSeconds
			&&	_rLHS.Seconds	== _rRHS.Seconds
			&&	_rLHS.Minutes	== _rRHS.Minutes
			&&	_rLHS.Hours		== _rRHS.Hours
			&&	_rLHS.Day		== _rRHS.Day
			&&	_rLHS.Month		== _rRHS.Month
			&&	_rLHS.Year		== _rRHS.Year;
	}

	//---------------------------------------------------------------------
	sal_Bool operator != ( const util::DateTime& _rLHS, const util::DateTime& _rRHS )
	{
		return !( _rLHS == _rRHS );
	}

	//=====================================================================
	//= TemplateContent
	//=====================================================================
	struct TemplateContent;
	typedef	::std::vector< ::vos::ORef< TemplateContent > >	TemplateFolderContent;
    typedef TemplateFolderContent::const_iterator           ConstFolderIterator;
    typedef TemplateFolderContent::iterator                 FolderIterator;

	/** a struct describing one content in one of the template dirs (or at least it's relevant aspects)
	*/
	struct TemplateContent : public ::vos::OReference
	{
	public:

	private:
		INetURLObject			m_aURL;
		String					m_sLocalName;		// redundant - last segment of m_aURL
		util::DateTime			m_aLastModified;	// date of last modification as reported by UCP
		TemplateFolderContent	m_aSubContents;		// sorted (by name) list of the children

	private:
		inline	void	implResetDate( )
		{
			m_aLastModified.HundredthSeconds = m_aLastModified.Seconds = m_aLastModified.Minutes = m_aLastModified.Hours = 0;
			m_aLastModified.Day = m_aLastModified.Month = m_aLastModified.Year = 0;
		}

	private:
		~TemplateContent();

	public:
		TemplateContent();
		TemplateContent( const INetURLObject& _rURL );
		TemplateContent( const INetURLObject& _rURL, const util::DateTime& _rLastModified );

		// attribute access
		inline String					getName( ) const							{ return m_sLocalName; }
		inline String					getURL( ) const								{ return m_aURL.GetMainURL( INetURLObject::DECODE_TO_IURI ); }
		inline void						setModDate( const util::DateTime& _rDate )	{ m_aLastModified = _rDate; }
		inline const util::DateTime&	getModDate( ) const							{ return m_aLastModified; }

		inline TemplateFolderContent&	getSubContents()			{ return m_aSubContents; }
		inline const TemplateFolderContent&	getSubContents() const	{ return m_aSubContents; }

                inline ConstFolderIterator              begin() const   { return m_aSubContents.begin(); }
                inline ConstFolderIterator              end() const             { return m_aSubContents.end(); }
		inline TemplateFolderContent::size_type
										size() const	{ return m_aSubContents.size(); }

		inline void						push_back( const ::vos::ORef< TemplateContent >& _rxNewElement )
														{ m_aSubContents.push_back( _rxNewElement ); }
	};

	//---------------------------------------------------------------------
	DBG_NAME( TemplateContent )

	//---------------------------------------------------------------------
	TemplateContent::TemplateContent()
	{
		DBG_CTOR( TemplateContent, NULL );
		implResetDate();
	}

	//---------------------------------------------------------------------
	TemplateContent::TemplateContent( const INetURLObject& _rURL )
		:m_aURL( _rURL )
	{
		DBG_CTOR( TemplateContent, NULL );
		DBG_ASSERT( INET_PROT_NOT_VALID != m_aURL.GetProtocol(), "TemplateContent::TemplateContent: invalid URL!" );
		m_sLocalName = m_aURL.getName();
		implResetDate();
	}

	//---------------------------------------------------------------------
	TemplateContent::TemplateContent( const INetURLObject& _rURL, const util::DateTime& _rLastModified )
		:m_aURL( _rURL )
		,m_aLastModified( _rLastModified )
	{
		DBG_CTOR( TemplateContent, NULL );
		DBG_ASSERT( INET_PROT_NOT_VALID != m_aURL.GetProtocol(), "TemplateContent::TemplateContent: invalid URL!" );
		m_sLocalName = m_aURL.getName();
	}

	//---------------------------------------------------------------------
	TemplateContent::~TemplateContent()
	{
		DBG_DTOR( TemplateContent, NULL );
	}

	//=====================================================================
	//= stl helpers
	//=====================================================================
	//---------------------------------------------------------------------
	/// compares two TemplateContent by URL
	struct TemplateContentURLLess
		:public ::std::binary_function	<	::vos::ORef< TemplateContent >
										,	::vos::ORef< TemplateContent >
										,	bool
										>
	{
		bool operator() ( const ::vos::ORef< TemplateContent >& _rxLHS, const ::vos::ORef< TemplateContent >& _rxRHS ) const
		{
			return	_rxLHS->getURL() < _rxRHS->getURL()
				?	true
				:	false;
		}
	};

	//---------------------------------------------------------------------
	/// sorts the sib contents of a TemplateFolderContent
	struct SubContentSort : public ::std::unary_function< ::vos::ORef< TemplateContent >, void >
	{
		void operator() ( TemplateFolderContent& _rFolder ) const
		{
			// sort the directory by name
			::std::sort(
				_rFolder.begin(),
				_rFolder.end(),
				TemplateContentURLLess()
			);

			// sort the sub directories by name
			::std::for_each(
				_rFolder.begin(),
				_rFolder.end(),
				*this
			);
		}

		void operator() ( const ::vos::ORef< TemplateContent >& _rxContent ) const
		{
			if ( _rxContent.isValid() && _rxContent->size() )
			{
				operator()( _rxContent->getSubContents() );
			}
		}
	};
	//---------------------------------------------------------------------
	/** does a deep compare of two template contents
	*/
	struct TemplateContentEqual
		:public ::std::binary_function	<	::vos::ORef< TemplateContent >
										,	::vos::ORef< TemplateContent >
										,	bool
										>
	{
		//.................................................................
		bool operator() (const ::vos::ORef< TemplateContent >& _rLHS, const ::vos::ORef< TemplateContent >& _rRHS )
		{
			if ( !_rLHS.isValid() || !_rRHS.isValid() )
			{
				DBG_ERROR( "TemplateContentEqual::operator(): invalid contents!" );
				return true;
					// this is not strictly true, in case only one is invalid - but this is a heavy error anyway
			}

			if ( _rLHS->getURL() != _rRHS->getURL() )
				return false;

			if ( _rLHS->getModDate() != _rRHS->getModDate() )
				return false;

			if ( _rLHS->getSubContents().size() != _rRHS->getSubContents().size() )
				return false;

			if ( _rLHS->getSubContents().size() )
			{	// there are children
				// -> compare them
				::std::pair< FolderIterator, FolderIterator > aFirstDifferent = ::std::mismatch(
					_rLHS->getSubContents().begin(),
					_rLHS->getSubContents().end(),
					_rRHS->getSubContents().begin(),
					*this
				);
				if ( aFirstDifferent.first != _rLHS->getSubContents().end() )
					return false;// the sub contents differ
			}

			return true;
		}
	};

	//---------------------------------------------------------------------
	/// base class for functors which act an an SvStream
	struct StorageHelper
	{
	protected:
		SvStream&	m_rStorage;
		StorageHelper( SvStream& _rStorage ) : m_rStorage( _rStorage ) { }
	};

	//---------------------------------------------------------------------
	/// functor which allows storing a string
	struct StoreString
			:public ::std::unary_function< String, void >
			,public StorageHelper
	{
		StoreString( SvStream& _rStorage ) : StorageHelper( _rStorage ) { }

		void operator() ( const String& _rString ) const
		{
			m_rStorage.WriteByteString( _rString );
		}
	};

	//---------------------------------------------------------------------
	/// functor which stores the local name of a TemplateContent
	struct StoreLocalContentName
			:public ::std::unary_function< ::vos::ORef< TemplateContent >, void >
			,public StoreString
	{
		StoreLocalContentName( SvStream& _rStorage ) : StoreString( _rStorage ) { }

		void operator() ( const ::vos::ORef< TemplateContent >& _rxContent ) const
		{
			DBG_ERRORFILE( "This method must not be used, the whole URL must be stored!" );

			// use the base class operator with the local name of the content
			StoreString::operator() ( _rxContent->getName() );
		}
	};

	//---------------------------------------------------------------------
	struct StoreContentURL
			:public ::std::unary_function< ::vos::ORef< TemplateContent >, void >
			,public StoreString
	{
        uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;

        StoreContentURL( SvStream& _rStorage,
                         const uno::Reference<
                            util::XOfficeInstallationDirectories > &
                                xOfficeInstDirs )
        : StoreString( _rStorage ), m_xOfficeInstDirs( xOfficeInstDirs ) { }

		void operator() ( const ::vos::ORef< TemplateContent >& _rxContent ) const
		{
			// use the base class operator with the local name of the content
            String sURL = _rxContent->getURL();
            // #116281# Keep office installtion relocatable. Never store
            // any direct references to office installation directory.
            sURL = m_xOfficeInstDirs->makeRelocatableURL( sURL );
            StoreString::operator() ( sURL );
		}
	};

	//---------------------------------------------------------------------
	/// functor which stores the complete content of a TemplateContent
	struct StoreFolderContent
			:public ::std::unary_function< ::vos::ORef< TemplateContent >, void >
			,public StorageHelper
	{
        uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;

	public:
		StoreFolderContent( SvStream& _rStorage,
                         const uno::Reference<
                            util::XOfficeInstallationDirectories > &
                                xOfficeInstDirs )
        : StorageHelper( _rStorage ), m_xOfficeInstDirs( xOfficeInstDirs ) { }

		//.................................................................
		void operator() ( const TemplateContent& _rContent ) const
		{
			// store the info about this content
			m_rStorage << _rContent.getModDate();

			// store the info about the children
			// the number
			m_rStorage << (sal_Int32)_rContent.size();
			// their URLs ( the local name is not enough, since URL might be not a hierarchical one, "expand:" for example )
			::std::for_each(
				_rContent.getSubContents().begin(),
				_rContent.getSubContents().end(),
				StoreContentURL( m_rStorage, m_xOfficeInstDirs )
			);
			// their content
			::std::for_each(
				_rContent.getSubContents().begin(),
				_rContent.getSubContents().end(),
				*this
			);
		}

		//.................................................................
		void operator() ( const ::vos::ORef< TemplateContent >& _rxContent ) const
		{
			if ( _rxContent.isValid() )
			{
				operator()( *_rxContent );
			}
		}
	};

	//---------------------------------------------------------------------
	/// functor which reads a complete TemplateContent instance
	struct ReadFolderContent
			:public ::std::unary_function< ::vos::ORef< TemplateContent >, void >
			,public StorageHelper
	{
        uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;

		ReadFolderContent( SvStream& _rStorage,
                         const uno::Reference<
                            util::XOfficeInstallationDirectories > &
                                xOfficeInstDirs )
        : StorageHelper( _rStorage ), m_xOfficeInstDirs( xOfficeInstDirs ) { }

		//.................................................................
		void operator() ( TemplateContent& _rContent ) const
		{
			// store the info about this content
			util::DateTime aModDate;
			m_rStorage >> aModDate;
			_rContent.setModDate( aModDate );

			// store the info about the children
			// the number
			sal_Int32 nChildren = 0;
			m_rStorage >> nChildren;
			TemplateFolderContent& rChildren = _rContent.getSubContents();
			rChildren.resize( 0 );
			rChildren.reserve( nChildren );
			// initialize them with their (local) names
			while ( nChildren-- )
			{
				String sURL;
				m_rStorage.ReadByteString( sURL );
                sURL = m_xOfficeInstDirs->makeAbsoluteURL( sURL );
				INetURLObject aChildURL( sURL );
				rChildren.push_back( new TemplateContent( aChildURL ) );
			}

			// their content
			::std::for_each(
				_rContent.getSubContents().begin(),
				_rContent.getSubContents().end(),
				*this
			);
		}

		//.................................................................
		void operator() ( const ::vos::ORef< TemplateContent >& _rxContent ) const
		{
			if ( _rxContent.isValid() )
			{
				operator()( *_rxContent );
			}
		}
	};

	//=====================================================================
	//= TemplateFolderCacheImpl
	//=====================================================================
    class TemplateFolderCacheImpl
	{
	private:
		TemplateFolderContent			m_aPreviousState;	// the current state of the template dirs (as found on the HD)
		TemplateFolderContent			m_aCurrentState;	// the previous state of the template dirs (as found in the cache file)

        osl::Mutex                      m_aMutex;
        // will be lazy inited; never access directly; use getOfficeInstDirs().
        uno::Reference< util::XOfficeInstallationDirectories > m_xOfficeInstDirs;

		SvStream*						m_pCacheStream;
		sal_Bool						m_bNeedsUpdate : 1;
		sal_Bool						m_bKnowState : 1;
		sal_Bool						m_bValidCurrentState : 1;
		sal_Bool						m_bAutoStoreState : 1;

	public:
		TemplateFolderCacheImpl( sal_Bool _bAutoStoreState );
		~TemplateFolderCacheImpl( );

		sal_Bool	needsUpdate( sal_Bool _bForceCheck );
		void		storeState( sal_Bool _bForceRetrieval );

	private:
		void		initTemplDirs( ::std::vector< String >& _rRootDirs );
		sal_Bool	openCacheStream( sal_Bool _bForRead );
		void		closeCacheStream( );

		/// read the state of the dirs from the cache file
		sal_Bool	readPreviousState();
		/// read the current state of the dirs
		sal_Bool	readCurrentState();

		String		implParseSmart( const String& _rPath );

		sal_Bool	implReadFolder( const ::vos::ORef< TemplateContent >& _rxRoot );

		static	String		getCacheFileName();
		static	sal_Int32	getMagicNumber();
		static	void		normalize( TemplateFolderContent& _rState );

		// @return <TRUE/> if the states equal
		static	sal_Bool	equalStates( const TemplateFolderContent& _rLHS, const TemplateFolderContent& _rRHS );

        // late initialize m_xOfficeInstDirs
        uno::Reference< util::XOfficeInstallationDirectories > getOfficeInstDirs();
	};

	//---------------------------------------------------------------------
	TemplateFolderCacheImpl::TemplateFolderCacheImpl( sal_Bool _bAutoStoreState )
		:m_pCacheStream			( NULL )
		,m_bNeedsUpdate			( sal_True )
		,m_bKnowState			( sal_False )
		,m_bValidCurrentState	( sal_False )
		,m_bAutoStoreState		( _bAutoStoreState )
	{
	}

	//---------------------------------------------------------------------
	TemplateFolderCacheImpl::~TemplateFolderCacheImpl( )
	{
		// store the current state if possible and required
		if ( m_bValidCurrentState && m_bAutoStoreState )
			storeState( sal_False );

		closeCacheStream( );
	}

	//---------------------------------------------------------------------
	sal_Int32 TemplateFolderCacheImpl::getMagicNumber()
	{
		sal_Int32 nMagic = 0;
		( nMagic += (sal_Int8)'T' ) <<= 4;
		( nMagic += (sal_Int8)'D' ) <<= 4;
		( nMagic += (sal_Int8)'S' ) <<= 4;
		( nMagic += (sal_Int8)'C' ) <<= 0;
		return nMagic;
	}

	//---------------------------------------------------------------------
	String TemplateFolderCacheImpl::getCacheFileName()
	{
		return String::CreateFromAscii( ".templdir.cache" );
	}


	//---------------------------------------------------------------------
	void TemplateFolderCacheImpl::normalize( TemplateFolderContent& _rState )
	{
		SubContentSort()( _rState );
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCacheImpl::equalStates( const TemplateFolderContent& _rLHS, const TemplateFolderContent& _rRHS )
	{
		if ( _rLHS.size() != _rRHS.size() )
			return sal_False;

		// as both arrays are sorted (by definition - this is a precondition of this method)
		// we can simply go from the front to the back and compare the single elements

		::std::pair< ConstFolderIterator, ConstFolderIterator > aFirstDifferent = ::std::mismatch(
			_rLHS.begin(),
			_rLHS.end(),
			_rRHS.begin(),
			TemplateContentEqual()
		);

		return aFirstDifferent.first == _rLHS.end();
	}

	//---------------------------------------------------------------------
	void TemplateFolderCacheImpl::storeState( sal_Bool _bForceRetrieval )
	{
		if ( !m_bValidCurrentState || _bForceRetrieval )
			readCurrentState( );

		if ( m_bValidCurrentState && openCacheStream( sal_False ) )
		{
			*m_pCacheStream	<< getMagicNumber();

			// store the template root folders
			// the size
			*m_pCacheStream << (sal_Int32)m_aCurrentState.size();
			// the complete URLs
			::std::for_each(
				m_aCurrentState.begin(),
				m_aCurrentState.end(),
                StoreContentURL( *m_pCacheStream, getOfficeInstDirs() )
			);

			// the contents
			::std::for_each(
				m_aCurrentState.begin(),
				m_aCurrentState.end(),
				StoreFolderContent( *m_pCacheStream, getOfficeInstDirs() )
			);
		}
	}

	//---------------------------------------------------------------------
	String TemplateFolderCacheImpl::implParseSmart( const String& _rPath )
	{
		INetURLObject aParser;
		aParser.SetSmartProtocol( INET_PROT_FILE );
		aParser.SetURL( _rPath, INetURLObject::WAS_ENCODED );
		if ( INET_PROT_NOT_VALID == aParser.GetProtocol() )
		{
			String sURL;
			LocalFileHelper::ConvertPhysicalNameToURL( _rPath, sURL );
			aParser.SetURL( sURL, INetURLObject::WAS_ENCODED );
		}
		return aParser.GetMainURL( INetURLObject::DECODE_TO_IURI );
	}

	//---------------------------------------------------------------------
	void TemplateFolderCacheImpl::closeCacheStream( )
	{
		DELETEZ( m_pCacheStream );
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCacheImpl::implReadFolder( const ::vos::ORef< TemplateContent >& _rxRoot )
	{
		try
		{
			// create a content for the current folder root
			Reference< XResultSet > xResultSet;
			Sequence< ::rtl::OUString > aContentProperties( 4);
			aContentProperties[0] = ::rtl::OUString::createFromAscii( "Title" );
			aContentProperties[1] = ::rtl::OUString::createFromAscii( "DateModified" );
			aContentProperties[2] = ::rtl::OUString::createFromAscii( "DateCreated" );
			aContentProperties[3] = ::rtl::OUString::createFromAscii( "IsFolder" );

			// get the set of sub contents in the folder
    		try
			{
				Reference< XDynamicResultSet > xDynResultSet;

				::ucbhelper::Content aTemplateRoot( _rxRoot->getURL(), Reference< XCommandEnvironment >() );
				xDynResultSet = aTemplateRoot.createDynamicCursor( aContentProperties, ::ucbhelper::INCLUDE_FOLDERS_AND_DOCUMENTS );
				if ( xDynResultSet.is() )
					xResultSet = xDynResultSet->getStaticResultSet();
			}
			catch( CommandAbortedException& )
			{
				DBG_ERRORFILE( "TemplateFolderCacheImpl::implReadFolder: caught a CommandAbortedException!" );
				return sal_False;
			}
			catch( ::com::sun::star::uno::Exception& )
			{
			}

			// collect the infos about the sub contents
			if ( xResultSet.is() )
			{
				Reference< XRow > xRow( xResultSet, UNO_QUERY_THROW );
				Reference< XContentAccess > xContentAccess( xResultSet, UNO_QUERY_THROW );

				while ( xResultSet->next() )
				{
					INetURLObject aSubContentURL( xContentAccess->queryContentIdentifierString() );

					// a new content instance
					::vos::ORef< TemplateContent > xChild = new TemplateContent( aSubContentURL );

					// the modified date
					xChild->setModDate( xRow->getTimestamp( 2 ) );	// date modified
					if ( xRow->wasNull() )
						xChild->setModDate( xRow->getTimestamp( 3 ) );	// fallback: date created

					// push back this content
					_rxRoot->push_back( xChild );

					// is it a folder?
					if ( xRow->getBoolean( 4 ) && !xRow->wasNull() )
					{	// yes -> step down
                                                ConstFolderIterator aNextLevelRoot = _rxRoot->end();
						--aNextLevelRoot;
						implReadFolder( *aNextLevelRoot );
					}
				}
			}
		}
		catch( const Exception& )
		{
			DBG_ERROR( "TemplateFolderCacheImpl::implReadFolder: caught an exception!" );
			return sal_False;
		}
		return sal_True;
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCacheImpl::readCurrentState()
	{
		// reset
		m_bValidCurrentState = sal_False;
        TemplateFolderContent aTemplateFolderContent;
		m_aCurrentState.swap( aTemplateFolderContent );

		// the template directories from the config
        const SvtPathOptions aPathOptions;
	    String		aDirs = aPathOptions.GetTemplatePath();
		sal_uInt16	nDirs = aDirs.GetTokenCount( ';' );

		m_aCurrentState.reserve( nDirs );
		// loop through all the root-level template folders
		for ( sal_uInt16 i=0; i<nDirs; ++i)
		{
            String sTemplatePath( aDirs.GetToken( i, ';' ) );
            sTemplatePath = aPathOptions.ExpandMacros( sTemplatePath );
			// create a new entry
			m_aCurrentState.push_back( new TemplateContent( INetURLObject( sTemplatePath ) ) );
			TemplateFolderContent::iterator aCurrentRoot = m_aCurrentState.end();
			--aCurrentRoot;

			if ( !implReadFolder( *aCurrentRoot ) )
				return sal_False;
		}

		// normalize the array (which basically means "sort it")
		normalize( m_aCurrentState );

		m_bValidCurrentState = sal_True;
		return m_bValidCurrentState;
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCacheImpl::readPreviousState()
	{
		DBG_ASSERT( m_pCacheStream, "TemplateFolderCacheImpl::readPreviousState: not to be called without stream!" );

		// reset
        TemplateFolderContent aTemplateFolderContent;
		m_aPreviousState.swap( aTemplateFolderContent );

		// check the magic number
		sal_Int32 nMagic = 0;
		*m_pCacheStream >> nMagic;
		DBG_ASSERT( getMagicNumber() == nMagic, "TemplateFolderCacheImpl::readPreviousState: invalid cache file!" );
		if ( getMagicNumber() != nMagic )
			return sal_False;

		// the root directories
		// their number
		sal_Int32 nRootDirectories = 0;
		*m_pCacheStream >> nRootDirectories;
		// init empty TemplateContens with the URLs
		m_aPreviousState.reserve( nRootDirectories );
		while ( nRootDirectories-- )
		{
			String sURL;
			m_pCacheStream->ReadByteString( sURL );
            // #116281# Keep office installtion relocatable. Never store
            // any direct references to office installation directory.
            sURL = getOfficeInstDirs()->makeAbsoluteURL( sURL );
			m_aPreviousState.push_back(
				new TemplateContent( INetURLObject(sURL) ) );
		}

		// read the contents of the root folders
		::std::for_each(
			m_aPreviousState.begin(),
			m_aPreviousState.end(),
			ReadFolderContent( *m_pCacheStream, getOfficeInstDirs() )
		);

		DBG_ASSERT( !m_pCacheStream->GetErrorCode(), "TemplateFolderCacheImpl::readPreviousState: unknown error during reading the state cache!" );

		// normalize the array (which basically means "sort it")
		normalize( m_aPreviousState );

		return sal_True;
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCacheImpl::openCacheStream( sal_Bool _bForRead )
	{
		// close any old stream instance
		closeCacheStream( );

		// get the storage directory
		String sStorageURL = implParseSmart( SvtPathOptions().GetStoragePath() );
		INetURLObject aStorageURL( sStorageURL );
		if ( INET_PROT_NOT_VALID == aStorageURL.GetProtocol() )
		{
			DBG_ERROR( "TemplateFolderCacheImpl::openCacheStream: invalid storage path!" );
			return sal_False;
		}

		// append our name
		aStorageURL.Append( getCacheFileName() );

		// open the stream
		m_pCacheStream = UcbStreamHelper::CreateStream( aStorageURL.GetMainURL( INetURLObject::DECODE_TO_IURI ),
			_bForRead ?	STREAM_READ | STREAM_NOCREATE : STREAM_WRITE | STREAM_TRUNC );
		DBG_ASSERT( m_pCacheStream, "TemplateFolderCacheImpl::openCacheStream: could not open/create the cache stream!" );
		if ( m_pCacheStream && m_pCacheStream->GetErrorCode() )
		{
			DELETEZ( m_pCacheStream );
		}

		if ( m_pCacheStream )
			m_pCacheStream->SetStreamCharSet( RTL_TEXTENCODING_UTF8 );

		return NULL != m_pCacheStream;
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCacheImpl::needsUpdate( sal_Bool _bForceCheck )
	{
		if ( m_bKnowState && !_bForceCheck )
			return m_bNeedsUpdate;

		m_bNeedsUpdate = sal_True;
		m_bKnowState = sal_True;

		if ( readCurrentState() )
		{
			// open the stream which contains the cached state of the directories
			if ( openCacheStream( sal_True ) )
			{	// opening the stream succeeded
				if ( readPreviousState() )
				{
					m_bNeedsUpdate = !equalStates( m_aPreviousState, m_aCurrentState );
				}
				else
				{
					closeCacheStream();
				}
			}
		}
		return m_bNeedsUpdate;
	}

	//---------------------------------------------------------------------
	void TemplateFolderCacheImpl::initTemplDirs( ::std::vector< String >& )
	{
	}

    //---------------------------------------------------------------------
    uno::Reference< util::XOfficeInstallationDirectories >
    TemplateFolderCacheImpl::getOfficeInstDirs()
    {
        if ( !m_xOfficeInstDirs.is() )
        {
            osl::MutexGuard aGuard( m_aMutex );
            if ( !m_xOfficeInstDirs.is() )
            {
                // @@@ This is bad!
                uno::Reference< lang::XMultiServiceFactory > xSMgr
                    = comphelper::getProcessServiceFactory();
                OSL_ENSURE( xSMgr.is(), "No service manager!" );

                uno::Reference< beans::XPropertySet > xPropSet(
                    xSMgr, uno::UNO_QUERY );
                if ( xPropSet.is() )
                {
                    uno::Reference< uno::XComponentContext > xCtx;
                    xPropSet->getPropertyValue(
                        rtl::OUString(
                            RTL_CONSTASCII_USTRINGPARAM( "DefaultContext" ) ) )
                    >>= xCtx;

                    OSL_ENSURE( xCtx.is(),
                                "Unable to obtain component context from service manager!" );

                    if ( xCtx.is() )
                    {
                        xCtx->getValueByName(
                            rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                "/singletons/com.sun.star.util.theOfficeInstallationDirectories" ) ) )
                        >>= m_xOfficeInstDirs;
                    }

                    OSL_ENSURE( m_xOfficeInstDirs.is(),
                                "Unable to obtain office directories singleton!" );

                }
            }
        }
        return m_xOfficeInstDirs;
    }

	//=====================================================================
	//= TemplateFolderCache
	//=====================================================================
	//---------------------------------------------------------------------
	TemplateFolderCache::TemplateFolderCache( sal_Bool _bAutoStoreState )
		:m_pImpl( new TemplateFolderCacheImpl( _bAutoStoreState ) )
	{
	}

	//---------------------------------------------------------------------
	TemplateFolderCache::~TemplateFolderCache( )
	{
		DELETEZ( m_pImpl );
	}

	//---------------------------------------------------------------------
	sal_Bool TemplateFolderCache::needsUpdate( sal_Bool _bForceCheck )
	{
		return m_pImpl->needsUpdate( _bForceCheck );
	}

	//---------------------------------------------------------------------
	void TemplateFolderCache::storeState( sal_Bool _bForceRetrieval )
	{
		m_pImpl->storeState( _bForceRetrieval );
	}

//.........................................................................
}	// namespace sfx2
//.........................................................................