/**************************************************************
 * 
 * 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_package.hxx"
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/embed/ElementModes.hpp>
#include <com/sun/star/embed/XHierarchicalStorageAccess2.hpp>
#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>

#include "ohierarchyholder.hxx"

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

//===============================================
// OHierarchyHolder_Impl
//===============================================

//-----------------------------------------------
uno::Reference< embed::XExtendedStorageStream > OHierarchyHolder_Impl::GetStreamHierarchically( sal_Int32 nStorageMode, OStringList_Impl& aListPath, sal_Int32 nStreamMode, const ::comphelper::SequenceAsHashMap& aEncryptionData )
{
	uno::Reference< embed::XStorage > xOwnStor( m_xWeakOwnStorage.get(), uno::UNO_QUERY_THROW );

	if ( !( nStorageMode & embed::ElementModes::WRITE ) && ( nStreamMode & embed::ElementModes::WRITE ) )
		throw io::IOException();

	uno::Reference< embed::XExtendedStorageStream > xResult =
		m_xChild->GetStreamHierarchically( nStorageMode, aListPath, nStreamMode, aEncryptionData );
	if ( !xResult.is() )
		throw uno::RuntimeException();

	return xResult;
}

//-----------------------------------------------
void OHierarchyHolder_Impl::RemoveStreamHierarchically( OStringList_Impl& aListPath )
{
	uno::Reference< embed::XStorage > xOwnStor( m_xWeakOwnStorage.get(), uno::UNO_QUERY_THROW );

	m_xChild->RemoveStreamHierarchically( aListPath );
}

//-----------------------------------------------
// static
OStringList_Impl OHierarchyHolder_Impl::GetListPathFromString( const ::rtl::OUString& aPath )
{
	OStringList_Impl aResult;
	sal_Int32 nIndex = 0;
	do
	{
		::rtl::OUString aName = aPath.getToken( 0, '/', nIndex );
		if ( !aName.getLength() )
			throw lang::IllegalArgumentException();

		aResult.push_back( aName );
	}
	while ( nIndex >= 0 );

	return aResult;
}

//===============================================
// OHierarchyElement_Impl
//===============================================

//-----------------------------------------------
uno::Reference< embed::XExtendedStorageStream > OHierarchyElement_Impl::GetStreamHierarchically( sal_Int32 nStorageMode, OStringList_Impl& aListPath, sal_Int32 nStreamMode, const ::comphelper::SequenceAsHashMap& aEncryptionData )
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !( nStorageMode & embed::ElementModes::WRITE ) && ( nStreamMode & embed::ElementModes::WRITE ) )
		throw io::IOException();

	if ( !aListPath.size() )
		throw uno::RuntimeException();

	::rtl::OUString aNextName = *(aListPath.begin());
	aListPath.erase( aListPath.begin() );

	uno::Reference< embed::XExtendedStorageStream > xResult;

	uno::Reference< embed::XStorage > xOwnStor = m_xOwnStorage.is() ? m_xOwnStorage
				: uno::Reference< embed::XStorage >( m_xWeakOwnStorage.get(), uno::UNO_QUERY );
	if ( !xOwnStor.is() )
		throw uno::RuntimeException();

	if ( !aListPath.size() )
	{
		if ( !aEncryptionData.size() )
        {
            uno::Reference< embed::XHierarchicalStorageAccess > xHStorage( xOwnStor, uno::UNO_QUERY_THROW );
			xResult = xHStorage->openStreamElementByHierarchicalName( aNextName, nStreamMode );
        }
		else
        {
            uno::Reference< embed::XHierarchicalStorageAccess2 > xHStorage( xOwnStor, uno::UNO_QUERY_THROW );
			xResult = xHStorage->openEncryptedStreamByHierarchicalName( aNextName, nStreamMode, aEncryptionData.getAsConstNamedValueList() );
        }

		uno::Reference< embed::XTransactedObject > xTransact( xResult, uno::UNO_QUERY );
		if ( xTransact.is() )
		{
			// the existence of the transacted object means that the stream is opened for writing also
			// so the whole chain must be committed
			uno::Reference< embed::XTransactionBroadcaster > xTrBroadcast( xTransact, uno::UNO_QUERY_THROW );
			xTrBroadcast->addTransactionListener( static_cast< embed::XTransactionListener* >( this ) );
		}
		else
		{
			uno::Reference< lang::XComponent > xStreamComp( xResult, uno::UNO_QUERY_THROW );
			xStreamComp->addEventListener( static_cast< lang::XEventListener* >( this ) );
		}

		m_aOpenStreams.push_back( uno::WeakReference< embed::XExtendedStorageStream >( xResult ) );
	}
	else
	{
		sal_Bool bNewElement = sal_False;
		::rtl::Reference< OHierarchyElement_Impl > aElement;
		OHierarchyElementList_Impl::iterator aIter = m_aChildren.find( aNextName );
		if ( aIter != m_aChildren.end() )
			aElement = aIter->second;

		if ( !aElement.is() )
		{
			bNewElement = sal_True;
			uno::Reference< embed::XStorage > xChildStorage = xOwnStor->openStorageElement( aNextName, nStorageMode );
			if ( !xChildStorage.is() )
				throw uno::RuntimeException();

			aElement = new OHierarchyElement_Impl( NULL, xChildStorage );
		}

		xResult = aElement->GetStreamHierarchically( nStorageMode, aListPath, nStreamMode, aEncryptionData );
		if ( !xResult.is() )
			throw uno::RuntimeException();

		if ( bNewElement )
		{
			m_aChildren[aNextName] = aElement;
			aElement->SetParent( this );
		}
	}

	// the subelement was opened successfully, remember the storage to let it be locked
	m_xOwnStorage = xOwnStor;

	return xResult;
}

//-----------------------------------------------
void OHierarchyElement_Impl::RemoveStreamHierarchically( OStringList_Impl& aListPath )
{
	::osl::MutexGuard aGuard( m_aMutex );

	if ( !aListPath.size() )
		throw uno::RuntimeException();

	::rtl::OUString aNextName = *(aListPath.begin());
	aListPath.erase( aListPath.begin() );

	uno::Reference< embed::XExtendedStorageStream > xResult;

	uno::Reference< embed::XStorage > xOwnStor = m_xOwnStorage.is() ? m_xOwnStorage
				: uno::Reference< embed::XStorage >( m_xWeakOwnStorage.get(), uno::UNO_QUERY );
	if ( !xOwnStor.is() )
		throw uno::RuntimeException();

	if ( !aListPath.size() )
	{
		xOwnStor->removeElement( aNextName );
	}
	else
	{
		sal_Bool bNewElement = sal_False;
		::rtl::Reference< OHierarchyElement_Impl > aElement;
		OHierarchyElementList_Impl::iterator aIter = m_aChildren.find( aNextName );
		if ( aIter != m_aChildren.end() )
			aElement = aIter->second;

		if ( !aElement.is() )
		{
			bNewElement = sal_True;
			uno::Reference< embed::XStorage > xChildStorage = xOwnStor->openStorageElement( aNextName,
																							embed::ElementModes::READWRITE );
			if ( !xChildStorage.is() )
				throw uno::RuntimeException();

			aElement = new OHierarchyElement_Impl( NULL, xChildStorage );
		}

		aElement->RemoveStreamHierarchically( aListPath );
	}

	uno::Reference< embed::XTransactedObject > xTransact( xOwnStor, uno::UNO_QUERY );
	if ( xTransact.is() )
		xTransact->commit();

	TestForClosing();
}

//-----------------------------------------------
void OHierarchyElement_Impl::Commit()
{
	::rtl::Reference< OHierarchyElement_Impl > aLocker( this );
	::rtl::Reference< OHierarchyElement_Impl > aParent;
	uno::Reference< embed::XStorage > xOwnStor;

	{
		::osl::MutexGuard aGuard( m_aMutex );
		aParent = m_rParent;
		xOwnStor = m_xOwnStorage;
	}

	if ( xOwnStor.is() )
	{
		uno::Reference< embed::XTransactedObject > xTransact( xOwnStor, uno::UNO_QUERY_THROW );
		xTransact->commit();
		if ( aParent.is() )
			aParent->Commit();
	}
}

//-----------------------------------------------
void OHierarchyElement_Impl::TestForClosing()
{
	::rtl::Reference< OHierarchyElement_Impl > aLocker( this );
	{
		::osl::MutexGuard aGuard( m_aMutex );

		if ( !m_aOpenStreams.size() && !m_aChildren.size() )
		{
			if ( m_rParent.is() )
			{
				// only the root storage should not be disposed, other storages can be disposed
				if ( m_xOwnStorage.is() )
				{
					try
					{
						m_xOwnStorage->dispose();
					}
					catch( uno::Exception& )
					{}
				}

				m_rParent->RemoveElement( this );
			}

			m_xOwnStorage = uno::Reference< embed::XStorage >();
		}
	}
}

//-----------------------------------------------
void SAL_CALL OHierarchyElement_Impl::disposing( const lang::EventObject& Source )
		throw ( uno::RuntimeException )
{
	uno::Sequence< embed::XStorage > aStoragesToCommit;
	
	try
	{
		::osl::ClearableMutexGuard aGuard( m_aMutex );
		uno::Reference< embed::XExtendedStorageStream > xStream( Source.Source, uno::UNO_QUERY );

		for ( OWeakStorRefList_Impl::iterator pStorageIter = m_aOpenStreams.begin();
			  pStorageIter != m_aOpenStreams.end(); )
		{
			OWeakStorRefList_Impl::iterator pTmp = pStorageIter++;
			if ( !pTmp->get().is() || pTmp->get() == xStream )
				m_aOpenStreams.erase( pTmp );
		}

		aGuard.clear();

		TestForClosing();
	}
	catch( uno::Exception& )
	{
		throw uno::RuntimeException(); // no exception must happen here, usually an exception means disaster
	}
}

//-----------------------------------------------
void OHierarchyElement_Impl::RemoveElement( const ::rtl::Reference< OHierarchyElement_Impl >& aRef )
{
	{
		::osl::MutexGuard aGuard( m_aMutex );
		for ( OHierarchyElementList_Impl::iterator aIter = m_aChildren.begin();
			  aIter != m_aChildren.end(); /* increment is done in body */)
		{
			OHierarchyElementList_Impl::iterator aTmpIter = aIter;
			aIter++;

			if ( aTmpIter->second == aRef )
				m_aChildren.erase( aTmpIter );
		}
	}

	TestForClosing();
}

// XTransactionListener
//-----------------------------------------------
void SAL_CALL OHierarchyElement_Impl::preCommit( const ::com::sun::star::lang::EventObject& /*aEvent*/ )
	throw (::com::sun::star::uno::Exception, ::com::sun::star::uno::RuntimeException)
{
}

//-----------------------------------------------
void SAL_CALL OHierarchyElement_Impl::commited( const ::com::sun::star::lang::EventObject& /*aEvent*/ )
	throw (::com::sun::star::uno::RuntimeException)
{
	try
	{
		Commit();
	}
	catch( uno::Exception& e )
	{
		throw lang::WrappedTargetRuntimeException(
							::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "Can not commit storage sequence!" ) ),
							uno::Reference< uno::XInterface >(),
							uno::makeAny( e ) );
	}
}

//-----------------------------------------------
void SAL_CALL OHierarchyElement_Impl::preRevert( const ::com::sun::star::lang::EventObject& /*aEvent*/ )
	throw (::com::sun::star::uno::Exception, ::com::sun::star::uno::RuntimeException)
{
}

//-----------------------------------------------
void SAL_CALL OHierarchyElement_Impl::reverted( const ::com::sun::star::lang::EventObject& /*aEvent*/ )
	throw (::com::sun::star::uno::RuntimeException)
{
}