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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: conncleanup.cxx,v $
* $Revision: 1.9 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_connectivity.hxx"
#include <connectivity/conncleanup.hxx>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <osl/diagnose.h>
//.........................................................................
namespace dbtools
{
//.........................................................................
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::lang;
//=====================================================================
static const ::rtl::OUString& getActiveConnectionPropertyName()
{
static const ::rtl::OUString s_sActiveConnectionPropertyName = ::rtl::OUString::createFromAscii("ActiveConnection");
return s_sActiveConnectionPropertyName;
}
//=====================================================================
//= OAutoConnectionDisposer
//=====================================================================
//---------------------------------------------------------------------
OAutoConnectionDisposer::OAutoConnectionDisposer(const Reference< XRowSet >& _rxRowSet, const Reference< XConnection >& _rxConnection)
:m_xRowSet( _rxRowSet )
,m_bRSListening( sal_False )
,m_bPropertyListening( sal_False )
{
Reference< XPropertySet > xProps(_rxRowSet, UNO_QUERY);
OSL_ENSURE(xProps.is(), "OAutoConnectionDisposer::OAutoConnectionDisposer: invalid rowset (no XPropertySet)!");
if (!xProps.is())
return;
try
{
xProps->setPropertyValue( getActiveConnectionPropertyName(), makeAny( _rxConnection ) );
m_xOriginalConnection = _rxConnection;
startPropertyListening( xProps );
}
catch( const Exception& )
{
OSL_ENSURE( sal_False, "OAutoConnectionDisposer::OAutoConnectionDisposer: caught an exception!" );
}
}
//---------------------------------------------------------------------
void OAutoConnectionDisposer::startPropertyListening( const Reference< XPropertySet >& _rxRowSet )
{
try
{
_rxRowSet->addPropertyChangeListener( getActiveConnectionPropertyName(), this );
m_bPropertyListening = sal_True;
}
catch( const Exception& )
{
OSL_ENSURE( sal_False, "OAutoConnectionDisposer::startPropertyListening: caught an exception!" );
}
}
//---------------------------------------------------------------------
void OAutoConnectionDisposer::stopPropertyListening( const Reference< XPropertySet >& _rxEventSource )
{
// prevent deletion of ourself while we're herein
Reference< XInterface > xKeepAlive(static_cast< XWeak* >(this));
try
{ // remove ourself as property change listener
OSL_ENSURE( _rxEventSource.is(), "OAutoConnectionDisposer::stopPropertyListening: invalid event source (no XPropertySet)!" );
if ( _rxEventSource.is() )
{
_rxEventSource->removePropertyChangeListener( getActiveConnectionPropertyName(), this );
m_bPropertyListening = sal_False;
}
}
catch( const Exception& )
{
OSL_ENSURE( sal_False, "OAutoConnectionDisposer::stopPropertyListening: caught an exception!" );
}
}
//---------------------------------------------------------------------
void OAutoConnectionDisposer::startRowSetListening()
{
OSL_ENSURE( !m_bRSListening, "OAutoConnectionDisposer::startRowSetListening: already listening!" );
try
{
if ( !m_bRSListening )
m_xRowSet->addRowSetListener( this );
}
catch( const Exception& )
{
OSL_ENSURE( sal_False, "OAutoConnectionDisposer::startRowSetListening: caught an exception!" );
}
m_bRSListening = sal_True;
}
//---------------------------------------------------------------------
void OAutoConnectionDisposer::stopRowSetListening()
{
OSL_ENSURE( m_bRSListening, "OAutoConnectionDisposer::stopRowSetListening: not listening!" );
try
{
m_xRowSet->removeRowSetListener( this );
}
catch( const Exception& )
{
OSL_ENSURE( sal_False, "OAutoConnectionDisposer::stopRowSetListening: caught an exception!" );
}
m_bRSListening = sal_False;
}
//---------------------------------------------------------------------
void SAL_CALL OAutoConnectionDisposer::propertyChange( const PropertyChangeEvent& _rEvent ) throw (RuntimeException)
{
if ( _rEvent.PropertyName.equals( getActiveConnectionPropertyName() ) )
{ // somebody set a new ActiveConnection
Reference< XConnection > xNewConnection;
_rEvent.NewValue >>= xNewConnection;
if ( isRowSetListening() )
{
// we're listening at the row set, this means that the row set does not have our
// m_xOriginalConnection as active connection anymore
// So there are two possibilities
// a. somebody sets a new connection which is not our original one
// b. somebody sets a new connection, which is exactly the original one
// a. we're not interested in a, but in b: In this case, we simply need to move to the state
// we had originally: listen for property changes, do not listen for row set changes, and
// do not dispose the connection until the row set does not need it anymore
if ( xNewConnection.get() == m_xOriginalConnection.get() )
{
stopRowSetListening();
}
}
else
{
// start listening at the row set. We're allowed to dispose the old connection as soon
// as the RowSet changed
// Unfortunately, the our database form implementations sometimes fire the change of their
// ActiveConnection twice. This is a error in forms/source/component/DatabaseForm.cxx, but
// changing this would require incompatible changes we can't do for a while.
// So for the moment, we have to live with it here.
//
// The only scenario where this doubled notification causes problems is when the connection
// of the form is reset to the one we're responsible for (m_xOriginalConnection), so we
// check this here.
//
// Yes, this is a HACK :(
//
// 94407 - 08.11.2001 - fs@openoffice.org
if ( xNewConnection.get() != m_xOriginalConnection.get() )
{
#if OSL_DEBUG_LEVEL > 0
Reference< XConnection > xOldConnection;
_rEvent.OldValue >>= xOldConnection;
OSL_ENSURE( xOldConnection.get() == m_xOriginalConnection.get(), "OAutoConnectionDisposer::propertyChange: unexpected (original) property value!" );
#endif
startRowSetListening();
}
}
}
}
//---------------------------------------------------------------------
void SAL_CALL OAutoConnectionDisposer::disposing( const EventObject& _rSource ) throw (RuntimeException)
{
// the rowset is beeing disposed, and nobody has set a new ActiveConnection in the meantime
if ( isRowSetListening() )
stopRowSetListening();
clearConnection();
if ( isPropertyListening() )
stopPropertyListening( Reference< XPropertySet >( _rSource.Source, UNO_QUERY ) );
}
//---------------------------------------------------------------------
void OAutoConnectionDisposer::clearConnection()
{
try
{
// dispose the old connection
Reference< XComponent > xComp(m_xOriginalConnection, UNO_QUERY);
if (xComp.is())
xComp->dispose();
m_xOriginalConnection.clear();
}
catch(Exception&)
{
OSL_ENSURE(sal_False, "OAutoConnectionDisposer::clearConnection: caught an exception!");
}
}
//---------------------------------------------------------------------
void SAL_CALL OAutoConnectionDisposer::cursorMoved( const ::com::sun::star::lang::EventObject& /*event*/ ) throw (::com::sun::star::uno::RuntimeException)
{
}
//---------------------------------------------------------------------
void SAL_CALL OAutoConnectionDisposer::rowChanged( const ::com::sun::star::lang::EventObject& /*event*/ ) throw (::com::sun::star::uno::RuntimeException)
{
}
//---------------------------------------------------------------------
void SAL_CALL OAutoConnectionDisposer::rowSetChanged( const ::com::sun::star::lang::EventObject& /*event*/ ) throw (::com::sun::star::uno::RuntimeException)
{
stopRowSetListening();
clearConnection();
}
//---------------------------------------------------------------------
//.........................................................................
} // namespace dbtools
//.........................................................................
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