xref: /aoo41x/main/comphelper/source/streaming/otransactedfilestream.cxx (revision 49b34792)

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 *
 * 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
 *
 * 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
 * under the License.
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_comphelper.hxx"
#include <osl/diagnose.h>
#include <com/sun/star/beans/PropertyAttribute.hpp>
#include <com/sun/star/io/XAsyncOutputMonitor.hpp>
#include <com/sun/star/embed/UseBackupException.hpp>

#include <comphelper/otransactedfilestream.hxx>
#include <comphelper/storagehelper.hxx>
#include <cppuhelper/implbase1.hxx>

using namespace ::com::sun::star;

namespace comphelper
{

// ========================================================================
class OTransactionHelper : public ::cppu::WeakImplHelper1 < embed::XTransactedObject >
{
	OTruncatedTransactedFileStream* m_pFileStream;
	uno::Reference< io::XStream > m_xStreamHolder;

public:
	OTransactionHelper( OTruncatedTransactedFileStream* pStream )
	: m_pFileStream( pStream )
	{
		m_xStreamHolder = static_cast< io::XStream* >( pStream );
		if ( !m_xStreamHolder.is() )
			throw uno::RuntimeException();
	}

    virtual void SAL_CALL commit(  ) throw (io::IOException, lang::WrappedTargetException, uno::RuntimeException);
    virtual void SAL_CALL revert(  ) throw (io::IOException, lang::WrappedTargetException, uno::RuntimeException);
};

// ------------------------------------------------------------------------
void SAL_CALL OTransactionHelper::commit(  ) throw (io::IOException, lang::WrappedTargetException, uno::RuntimeException)
{
	m_pFileStream->Commit_Impl();
}

// ------------------------------------------------------------------------
void SAL_CALL OTransactionHelper::revert(  ) throw (io::IOException, lang::WrappedTargetException, uno::RuntimeException)
{
	m_pFileStream->Revert_Impl();
}

// ========================================================================
struct TTFileStreamData_Impl
{
	uno::Reference< ucb::XSimpleFileAccess > m_xFileAccess;
	sal_Bool m_bDelete;
	::rtl::OUString m_aURL;

	// the streams below are not visible from outside so there is no need to remember position

	// original stream related members
	uno::Reference< io::XStream > m_xOrigStream;
	uno::Reference< io::XTruncate > m_xOrigTruncate;
	uno::Reference< io::XSeekable > m_xOrigSeekable;
	uno::Reference< io::XInputStream > m_xOrigInStream;
	uno::Reference< io::XOutputStream > m_xOrigOutStream;

	// temporary stream related members
	uno::Reference< io::XStream > m_xTempStream;
	uno::Reference< io::XTruncate > m_xTempTruncate;
	uno::Reference< io::XSeekable > m_xTempSeekable;
	uno::Reference< io::XInputStream > m_xTempInStream;
	uno::Reference< io::XOutputStream > m_xTempOutStream;

	sal_Bool m_bInOpen;
	sal_Bool m_bOutOpen;

	sal_Bool m_bTransacted;


	TTFileStreamData_Impl(
			const uno::Reference< ucb::XSimpleFileAccess >& xFileAccess,
			sal_Bool bDelete,
			const ::rtl::OUString& aURL,
			const uno::Reference< io::XStream >& xOrigStream,
			const uno::Reference< io::XTruncate >& xOrigTruncate,
			const uno::Reference< io::XSeekable >& xOrigSeekable,
			const uno::Reference< io::XInputStream >& xOrigInStream,
			const uno::Reference< io::XOutputStream >& xOrigOutStream,
			const uno::Reference< io::XStream >& xTempStream,
			const uno::Reference< io::XTruncate >& xTempTruncate,
			const uno::Reference< io::XSeekable >& xTempSeekable,
			const uno::Reference< io::XInputStream >& xTempInStream,
			const uno::Reference< io::XOutputStream >& xTempOutStream )
	: m_xFileAccess( xFileAccess )
	, m_bDelete( bDelete )
	, m_aURL( aURL )
	, m_xOrigStream( xOrigStream )
	, m_xOrigTruncate( xOrigTruncate )
	, m_xOrigSeekable( xOrigSeekable )
	, m_xOrigInStream( xOrigInStream )
	, m_xOrigOutStream( xOrigOutStream )
	, m_xTempStream( xTempStream )
	, m_xTempTruncate( xTempTruncate )
	, m_xTempSeekable( xTempSeekable )
	, m_xTempInStream( xTempInStream )
	, m_xTempOutStream( xTempOutStream )
	, m_bInOpen( sal_False )
	, m_bOutOpen( sal_False )
	, m_bTransacted( sal_True )
	{}

	void NoTransaction()
	{
		m_bDelete = sal_False;
		m_bTransacted = sal_False;
		m_xTempStream = uno::Reference< io::XStream >();
		m_xTempTruncate = uno::Reference< io::XTruncate >();
		m_xTempSeekable = uno::Reference< io::XSeekable >();
		m_xTempInStream = uno::Reference< io::XInputStream >();
		m_xTempOutStream = uno::Reference< io::XOutputStream >();
	}

	void FreeOriginal()
	{
		m_bDelete = sal_False;
		m_bTransacted = sal_False;

		m_xOrigStream = m_xTempStream;
		m_xTempStream = uno::Reference< io::XStream >();

		m_xOrigTruncate = m_xTempTruncate;
		m_xTempTruncate = uno::Reference< io::XTruncate >();

		m_xOrigSeekable = m_xTempSeekable;
		m_xTempSeekable = uno::Reference< io::XSeekable >();

		m_xOrigInStream = m_xTempInStream;
		m_xTempInStream = uno::Reference< io::XInputStream >();

		m_xOrigOutStream = m_xTempOutStream;
		m_xTempOutStream = uno::Reference< io::XOutputStream >();
	}
};

// ========================================================================
// ------------------------------------------------------------------------
OTruncatedTransactedFileStream::OTruncatedTransactedFileStream(
		const ::rtl::OUString& aURL,
		const uno::Reference< lang::XMultiServiceFactory >& xFactory )
: m_pStreamData( NULL )
{
	uno::Reference< ucb::XSimpleFileAccess > xSimpleFileAccess(
		xFactory->createInstance( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.ucb.SimpleFileAccess" ) ) ),
		uno::UNO_QUERY_THROW );

	CommonInit_Impl( aURL, xSimpleFileAccess, xFactory, sal_False );
}

// ------------------------------------------------------------------------
OTruncatedTransactedFileStream::OTruncatedTransactedFileStream(
		const ::rtl::OUString& aURL,
		const uno::Reference< ucb::XSimpleFileAccess >& xFileAccess,
		const uno::Reference< lang::XMultiServiceFactory >& xFactory )
: m_pStreamData( NULL )
{
	CommonInit_Impl( aURL, xFileAccess, xFactory, sal_False );
}

// ------------------------------------------------------------------------
OTruncatedTransactedFileStream::OTruncatedTransactedFileStream(
		const ::rtl::OUString& aURL,
		const uno::Reference< ucb::XSimpleFileAccess >& xFileAccess,
		const uno::Reference< lang::XMultiServiceFactory >& xFactory,
		sal_Bool bDeleteIfNotCommited )
: m_pStreamData( NULL )
{
	CommonInit_Impl( aURL, xFileAccess, xFactory, sal_True );
	if ( m_pStreamData )
		m_pStreamData->m_bDelete = bDeleteIfNotCommited;
}

// ------------------------------------------------------------------------
OTruncatedTransactedFileStream::~OTruncatedTransactedFileStream()
{
	CloseAll_Impl();
}

// ------------------------------------------------------------------------
void OTruncatedTransactedFileStream::CloseAll_Impl()
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( m_pStreamData )
	{
		sal_Bool bDelete = m_pStreamData->m_bDelete;
		::rtl::OUString aURL = m_pStreamData->m_aURL;
		uno::Reference< ucb::XSimpleFileAccess > xFileAccess = m_pStreamData->m_xFileAccess;

		delete m_pStreamData;
		m_pStreamData = NULL;

		if ( bDelete && xFileAccess.is() && !aURL.isEmpty() )
		{
			// delete the file
			try
			{
				xFileAccess->kill( aURL );
			} catch( uno::Exception& )
			{
				OSL_ENSURE( sal_False, "Could not remove the file!" );
			}
		}
	}
}

// ------------------------------------------------------------------------
void OTruncatedTransactedFileStream::CommonInit_Impl(
		const ::rtl::OUString& aURL,
		const uno::Reference< ucb::XSimpleFileAccess >& xFileAccess,
		const uno::Reference< lang::XMultiServiceFactory >& xFactory,
		sal_Bool bDeleteOptionIsProvided )
{
	sal_Bool bDelete = sal_False;
	if ( !bDeleteOptionIsProvided )
		bDelete = !xFileAccess->exists( aURL );

	uno::Reference< io::XStream > xOrigStream = xFileAccess->openFileReadWrite( aURL );
	uno::Reference< io::XTruncate > xOrigTruncate( xOrigStream, uno::UNO_QUERY_THROW );
	uno::Reference< io::XSeekable > xOrigSeekable( xOrigStream, uno::UNO_QUERY_THROW );
	uno::Reference< io::XInputStream > xOrigInStream = xOrigStream->getInputStream();
	uno::Reference< io::XOutputStream > xOrigOutStream = xOrigStream->getOutputStream();
	if ( !xOrigInStream.is() || !xOrigOutStream.is() )
		throw uno::RuntimeException();

	// temporary stream related members
	uno::Reference< io::XStream > xTempStream( xFactory->createInstance(
		::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.io.TempFile" ) ) ),
		uno::UNO_QUERY_THROW );
	uno::Reference< io::XTruncate > xTempTruncate( xTempStream, uno::UNO_QUERY_THROW );
	uno::Reference< io::XSeekable > xTempSeekable( xTempStream, uno::UNO_QUERY_THROW );
	uno::Reference< io::XInputStream > xTempInStream = xTempStream->getInputStream();
	uno::Reference< io::XOutputStream > xTempOutStream = xTempStream->getOutputStream();
	if ( !xTempInStream.is() || !xTempOutStream.is() )
		throw uno::RuntimeException();

	m_pStreamData = new TTFileStreamData_Impl( xFileAccess, bDelete, aURL,
											xOrigStream, xOrigTruncate, xOrigSeekable, xOrigInStream, xOrigOutStream,
											xTempStream, xTempTruncate, xTempSeekable, xTempInStream, xTempOutStream );
}

// ------------------------------------------------------------------------
void OTruncatedTransactedFileStream::Commit_Impl()
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		sal_Int64 nPos = m_pStreamData->m_xTempSeekable->getPosition();
		m_pStreamData->m_xTempSeekable->seek( 0 );

		// after the following step fails the information might be lost, throw an exception with URL of temporary file
		try
		{
			m_pStreamData->m_xOrigTruncate->truncate();
			OStorageHelper::CopyInputToOutput( m_pStreamData->m_xTempInStream, m_pStreamData->m_xOrigOutStream );
			m_pStreamData->m_xOrigOutStream->flush();

			// in case the stream is based on a file it will implement the following interface
			// the call should be used to be sure that the contents are written to the file system
			uno::Reference< io::XAsyncOutputMonitor > asyncOutputMonitor( m_pStreamData->m_xOrigOutStream, uno::UNO_QUERY );
			if ( asyncOutputMonitor.is() )
				asyncOutputMonitor->waitForCompletion();
		}
		catch( uno::Exception& )
		{
			::rtl::OUString aTempURL;
			try {
				uno::Reference< beans::XPropertySet > xTempFile( m_pStreamData->m_xTempStream, uno::UNO_QUERY_THROW );
				uno::Any aUrl = xTempFile->getPropertyValue( ::rtl::OUString::createFromAscii( "Uri" ) );
				aUrl >>= aTempURL;
				xTempFile->setPropertyValue( ::rtl::OUString::createFromAscii( "RemoveFile" ),
									 		uno::makeAny( sal_False ) );

				m_pStreamData->m_xTempSeekable->seek( nPos );
			}
			catch( uno::Exception& )
			{
				OSL_ENSURE( sal_False, "These calls are pretty simple, they should not fail!\n" );
			}

			m_pStreamData->FreeOriginal();

			::rtl::OUString aErrTxt( RTL_CONSTASCII_USTRINGPARAM ( "Writing file failed!" ) );
			embed::UseBackupException aException( aErrTxt, uno::Reference< uno::XInterface >(), aTempURL );
			throw lang::WrappedTargetException( aErrTxt,
												static_cast < OWeakObject * > ( this ),
												uno::makeAny ( aException ) );
		}

		m_pStreamData->m_xOrigSeekable->seek( nPos );
		m_pStreamData->NoTransaction();
	}
	else
		throw io::NotConnectedException();
}

// ------------------------------------------------------------------------
void OTruncatedTransactedFileStream::Revert_Impl()
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
		m_pStreamData->m_xTempTruncate->truncate();
	else
		throw io::NotConnectedException();
}

// com::sun::star::io::XStream
// ------------------------------------------------------------------------
uno::Reference< io::XInputStream > SAL_CALL OTruncatedTransactedFileStream::getInputStream(  )
	throw (uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

    if ( m_pStreamData )
        m_pStreamData->m_bInOpen = sal_True;
	return static_cast< io::XInputStream* >( this );
}


// ------------------------------------------------------------------------
uno::Reference< io::XOutputStream > SAL_CALL OTruncatedTransactedFileStream::getOutputStream(  )
	throw (uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

    if ( m_pStreamData )
        m_pStreamData->m_bOutOpen = sal_True;
	return static_cast< io::XOutputStream* >( this );
}



// com::sun::star::io::XInputStream
// ------------------------------------------------------------------------
::sal_Int32 SAL_CALL OTruncatedTransactedFileStream::readBytes( uno::Sequence< ::sal_Int8 >& aData, ::sal_Int32 nBytesToRead )
	throw (io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempInStream.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xTempInStream->readBytes( aData, nBytesToRead );
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigInStream.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xOrigInStream->readBytes( aData, nBytesToRead );
	}
}


// ------------------------------------------------------------------------
::sal_Int32 SAL_CALL OTruncatedTransactedFileStream::readSomeBytes( uno::Sequence< ::sal_Int8 >& aData, ::sal_Int32 nMaxBytesToRead )
	throw (io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempInStream.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xTempInStream->readSomeBytes( aData, nMaxBytesToRead );
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigInStream.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xOrigInStream->readSomeBytes( aData, nMaxBytesToRead );
	}
}

// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::skipBytes( ::sal_Int32 nBytesToSkip )
	throw (io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempInStream.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xTempInStream->skipBytes( nBytesToSkip );
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigInStream.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xOrigInStream->skipBytes( nBytesToSkip );
	}
}


// ------------------------------------------------------------------------
::sal_Int32 SAL_CALL OTruncatedTransactedFileStream::available(  )
	throw (io::NotConnectedException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempInStream.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xTempInStream->available();
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigInStream.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xOrigInStream->available();
	}
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::closeInput()
	throw (io::NotConnectedException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	m_pStreamData->m_bInOpen = sal_False;
	if ( !m_pStreamData->m_bOutOpen )
		CloseAll_Impl();
}



// com::sun::star::io::XOutputStream
// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::writeBytes( const uno::Sequence< ::sal_Int8 >& aData )
	throw (io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempOutStream.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xTempOutStream->writeBytes( aData );
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigOutStream.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xOrigOutStream->writeBytes( aData );
	}
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::flush(  )
	throw (io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
	{
		OSL_ENSURE( sal_False, "flush() call on closed stream!\n" );
		return;
		// in future throw exception, for now some code might call flush() on closed stream
		// since file ucp implementation allows it
		// throw io::NotConnectedException();
	}

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempOutStream.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xTempOutStream->flush();
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigOutStream.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xOrigOutStream->flush();
	}
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::closeOutput(  )
	throw (io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	m_pStreamData->m_bOutOpen = sal_False;
	if ( !m_pStreamData->m_bInOpen )
		CloseAll_Impl();
}



// com::sun::star::io::XTruncate
// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::truncate(  )
	throw (io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempTruncate.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xTempTruncate->truncate();
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigTruncate.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xOrigTruncate->truncate();
	}
}



// com::sun::star::io::XSeekable
// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::seek( ::sal_Int64 location )
	throw (lang::IllegalArgumentException, io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempSeekable.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xTempSeekable->seek( location );
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigSeekable.is() )
			throw uno::RuntimeException();

		m_pStreamData->m_xOrigSeekable->seek( location );
	}
}


// ------------------------------------------------------------------------
::sal_Int64 SAL_CALL OTruncatedTransactedFileStream::getPosition(  )
	throw (io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempSeekable.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xTempSeekable->getPosition();
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigSeekable.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xOrigSeekable->getPosition();
	}
}


// ------------------------------------------------------------------------
::sal_Int64 SAL_CALL OTruncatedTransactedFileStream::getLength(  )
	throw (io::IOException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	if ( m_pStreamData->m_bTransacted )
	{
		// temporary stream data should be provided
		if ( !m_pStreamData->m_xTempSeekable.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xTempSeekable->getLength();
	}
	else
	{
		// the original stream data should be provided
		if ( !m_pStreamData->m_xOrigSeekable.is() )
			throw uno::RuntimeException();

		return m_pStreamData->m_xOrigSeekable->getLength();
	}
}

// com::sun::star::beans::XPropertySetInfo
// ------------------------------------------------------------------------
uno::Sequence< beans::Property > SAL_CALL OTruncatedTransactedFileStream::getProperties()
	throw (uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	uno::Sequence< beans::Property > aProps( 1 );
	aProps[0].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "TransactionSupport" ) );
	aProps[0].Type = getCppuType( static_cast< uno::Reference< beans::XPropertySet >* >( NULL ) );
	aProps[0].Attributes = beans::PropertyAttribute::TRANSIENT | beans::PropertyAttribute::READONLY;

	return aProps;
}


// ------------------------------------------------------------------------
beans::Property SAL_CALL OTruncatedTransactedFileStream::getPropertyByName( const ::rtl::OUString& aName )
	throw (beans::UnknownPropertyException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	::rtl::OUString aTransactionPropName( RTL_CONSTASCII_USTRINGPARAM( "TransactionSupport" ) );

	if ( !aName.equals( aTransactionPropName ) )
		throw beans::UnknownPropertyException();

	beans::Property aProp;
	aProp.Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "TransactionSupport" ) );
	aProp.Type = getCppuType( static_cast< uno::Reference< beans::XPropertySet >* >( NULL ) );
	aProp.Attributes = beans::PropertyAttribute::TRANSIENT | beans::PropertyAttribute::READONLY;

	return aProp;
}


// ------------------------------------------------------------------------
::sal_Bool SAL_CALL OTruncatedTransactedFileStream::hasPropertyByName( const ::rtl::OUString& Name )
	throw (uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	::rtl::OUString aTransactionPropName( RTL_CONSTASCII_USTRINGPARAM( "TransactionSupport" ) );
	return ( Name.equals( aTransactionPropName ) );
}



// com::sun::star::beans::XPropertySet
// ------------------------------------------------------------------------
uno::Reference< beans::XPropertySetInfo > SAL_CALL OTruncatedTransactedFileStream::getPropertySetInfo()
	throw (uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	return static_cast< beans::XPropertySetInfo* >( this );
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::setPropertyValue( const ::rtl::OUString& aPropertyName, const uno::Any& )
	throw (beans::UnknownPropertyException, beans::PropertyVetoException, lang::IllegalArgumentException, lang::WrappedTargetException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	::rtl::OUString aTransactionPropName( RTL_CONSTASCII_USTRINGPARAM( "TransactionSupport" ) );
	if ( aPropertyName.equals( aTransactionPropName ) )
		throw beans::PropertyVetoException();

	throw beans::UnknownPropertyException();
}


// ------------------------------------------------------------------------
uno::Any SAL_CALL OTruncatedTransactedFileStream::getPropertyValue( const ::rtl::OUString& PropertyName )
	throw (beans::UnknownPropertyException, lang::WrappedTargetException, uno::RuntimeException)
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !m_pStreamData )
		throw io::NotConnectedException();

	::rtl::OUString aTransactionPropName( RTL_CONSTASCII_USTRINGPARAM( "TransactionSupport" ) );
	if ( PropertyName.equals( aTransactionPropName ) )
	{
		uno::Reference< embed::XTransactedObject > xObj;
		if ( m_pStreamData->m_bTransacted )
			xObj = static_cast< embed::XTransactedObject* >( new OTransactionHelper( this ) );

		return uno::makeAny( xObj );
	}

	throw beans::UnknownPropertyException();
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::addPropertyChangeListener( const ::rtl::OUString&, const uno::Reference< beans::XPropertyChangeListener >& )
	throw (beans::UnknownPropertyException, lang::WrappedTargetException, uno::RuntimeException)
{
	// not implemented
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::removePropertyChangeListener( const ::rtl::OUString&, const uno::Reference< beans::XPropertyChangeListener >& )
	throw (beans::UnknownPropertyException, lang::WrappedTargetException, uno::RuntimeException)
{
	// not implemented
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::addVetoableChangeListener( const ::rtl::OUString&, const uno::Reference< beans::XVetoableChangeListener >& )
	throw (beans::UnknownPropertyException, lang::WrappedTargetException, uno::RuntimeException)
{
	// not implemented
}


// ------------------------------------------------------------------------
void SAL_CALL OTruncatedTransactedFileStream::removeVetoableChangeListener( const ::rtl::OUString&, const uno::Reference< beans::XVetoableChangeListener >& )
	throw (beans::UnknownPropertyException, lang::WrappedTargetException, uno::RuntimeException)
{
	// not implemented
}


} // namespace comphelper