libreoffice/comphelper/source/misc/proxyaggregation.cxx

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_comphelper.hxx"
#include <comphelper/proxyaggregation.hxx>
#include <com/sun/star/reflection/XProxyFactory.hpp>

//.............................................................................
namespace comphelper
{
//.............................................................................

    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star::reflection;

    //=========================================================================
    //= OProxyAggregation
    //=========================================================================
    //-------------------------------------------------------------------------
    OProxyAggregation::OProxyAggregation( const Reference< XMultiServiceFactory >& _rxORB )
        :m_xORB( _rxORB )
    {
    }

    //-------------------------------------------------------------------------
    void OProxyAggregation::baseAggregateProxyFor( const Reference< XInterface >& _rxComponent, oslInterlockedCount& _rRefCount,
            ::cppu::OWeakObject& _rDelegator )
    {
        // first a factory for the proxy
        Reference< XProxyFactory > xFactory(
            m_xORB->createInstance( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.reflection.ProxyFactory" ) ) ),
            UNO_QUERY
        );
        OSL_ENSURE( xFactory.is(), "OProxyAggregation::baseAggregateProxyFor: could not create a proxy factory!" );

        // then the proxy itself
        if ( xFactory.is() )
        {
            { // i36686 OJ: achieve the desctruction of the tempoary -> otherwise it leads to _rRefCount -= 2
                m_xProxyAggregate = xFactory->createProxy( _rxComponent );
            }
            if ( m_xProxyAggregate.is() )
                m_xProxyAggregate->queryAggregation( ::getCppuType( &m_xProxyTypeAccess ) ) >>= m_xProxyTypeAccess;

            // aggregate the proxy
            osl_incrementInterlockedCount( &_rRefCount );
            if ( m_xProxyAggregate.is() )
            {
                // At this point in time, the proxy has a ref count of exactly two - in m_xControlContextProxy,
                // and in m_xProxyTypeAccess.
                // Remember to _not_ reset these members unless the delegator of the proxy has been reset, too!
                m_xProxyAggregate->setDelegator( _rDelegator );
            }
            osl_decrementInterlockedCount( &_rRefCount );
        }
    }

    //-------------------------------------------------------------------------
    Any SAL_CALL OProxyAggregation::queryAggregation( const Type& _rType ) throw (RuntimeException)
    {
        return m_xProxyAggregate.is() ? m_xProxyAggregate->queryAggregation( _rType ) : Any();
    }

    //-------------------------------------------------------------------------
    Sequence< Type > SAL_CALL OProxyAggregation::getTypes(  ) throw (RuntimeException)
    {
        Sequence< Type > aTypes;
        if ( m_xProxyAggregate.is() )
        {
            if ( m_xProxyTypeAccess.is() )
                aTypes = m_xProxyTypeAccess->getTypes();
        }
        return aTypes;
    }

    //-------------------------------------------------------------------------
    OProxyAggregation::~OProxyAggregation()
    {
        if ( m_xProxyAggregate.is() )
            m_xProxyAggregate->setDelegator( NULL );
        m_xProxyAggregate.clear();
        m_xProxyTypeAccess.clear();
            // this should remove the _two_only_ "real" references (means not delegated to
            // ourself) to this proxy, and thus delete it
    }

    //=========================================================================
    //= OComponentProxyAggregationHelper
    //=========================================================================
    //-------------------------------------------------------------------------
    OComponentProxyAggregationHelper::OComponentProxyAggregationHelper( const Reference< XMultiServiceFactory >& _rxORB,
        ::cppu::OBroadcastHelper& _rBHelper )
        :OProxyAggregation( _rxORB )
        ,m_rBHelper( _rBHelper )
    {
        OSL_ENSURE( _rxORB.is(), "OComponentProxyAggregationHelper::OComponentProxyAggregationHelper: invalid arguments!" );
    }

    //-------------------------------------------------------------------------
    void OComponentProxyAggregationHelper::componentAggregateProxyFor(
        const Reference< XComponent >& _rxComponent, oslInterlockedCount& _rRefCount,
        ::cppu::OWeakObject& _rDelegator )
    {
        OSL_ENSURE( _rxComponent.is(), "OComponentProxyAggregationHelper::componentAggregateProxyFor: invalid inner component!" );
        m_xInner = _rxComponent;

        // aggregate a proxy for the object
        baseAggregateProxyFor( m_xInner.get(), _rRefCount, _rDelegator );

        // add as event listener to the inner context, because we want to be notified of disposals
        osl_incrementInterlockedCount( &_rRefCount );
        {
            if ( m_xInner.is() )
                m_xInner->addEventListener( this );
        }
        osl_decrementInterlockedCount( &_rRefCount );
    }

    //-------------------------------------------------------------------------
    Any SAL_CALL OComponentProxyAggregationHelper::queryInterface( const Type& _rType ) throw (RuntimeException)
    {
        Any aReturn( BASE::queryInterface( _rType ) );
        if ( !aReturn.hasValue() )
            aReturn = OProxyAggregation::queryAggregation( _rType );
        return aReturn;
    }

    //-------------------------------------------------------------------------
    IMPLEMENT_FORWARD_XTYPEPROVIDER2( OComponentProxyAggregationHelper, BASE, OProxyAggregation )

    //-------------------------------------------------------------------------
    OComponentProxyAggregationHelper::~OComponentProxyAggregationHelper( )
    {
        OSL_ENSURE( m_rBHelper.bDisposed, "OComponentProxyAggregationHelper::~OComponentProxyAggregationHelper: you should dispose your derived class in the dtor, if necessary!" );
            // if this asserts, add the following to your derived class dtor:
            //
            // if ( !m_rBHelper.bDisposed )
            // {
            //   acquire(); // to prevent duplicate dtor calls
            //   dispose();
            // }

        m_xInner.clear();
    }

    //-------------------------------------------------------------------------
    void SAL_CALL OComponentProxyAggregationHelper::disposing( const EventObject& _rSource ) throw (RuntimeException)
    {
        if ( _rSource.Source == m_xInner )
        {   // it's our inner context which is dying -> dispose ourself
            if ( !m_rBHelper.bDisposed && !m_rBHelper.bInDispose )
            {   // (if necessary only, of course)
                dispose();
            }
        }
    }

    //-------------------------------------------------------------------------
    void SAL_CALL OComponentProxyAggregationHelper::dispose() throw( RuntimeException )
    {
        ::osl::MutexGuard aGuard( m_rBHelper.rMutex );

        // dispose our inner context
        // before we do this, remove ourself as listener - else in disposing( EventObject ), we
        // would dispose ourself a second time
        Reference< XComponent > xComp( m_xInner, UNO_QUERY );
        if ( xComp.is() )
        {
            xComp->removeEventListener( this );
            xComp->dispose();
            xComp.clear();
        }
    }

    //=========================================================================
    //= OComponentProxyAggregation
    //=========================================================================
    //-------------------------------------------------------------------------
    OComponentProxyAggregation::OComponentProxyAggregation( const Reference< XMultiServiceFactory >& _rxORB,
            const Reference< XComponent >& _rxComponent )
        :OComponentProxyAggregation_CBase( m_aMutex )
        ,OComponentProxyAggregationHelper( _rxORB, rBHelper )
    {
        OSL_ENSURE( _rxComponent.is(), "OComponentProxyAggregation::OComponentProxyAggregation: accessible is no XComponent!" );
        if ( _rxComponent.is() )
            componentAggregateProxyFor( _rxComponent, m_refCount, *this );
    }

    //-------------------------------------------------------------------------
    OComponentProxyAggregation::~OComponentProxyAggregation()
    {
        implEnsureDisposeInDtor( );
    }

    //-------------------------------------------------------------------------
    IMPLEMENT_FORWARD_XINTERFACE2( OComponentProxyAggregation, OComponentProxyAggregation_CBase, OComponentProxyAggregationHelper )

    //-------------------------------------------------------------------------
    IMPLEMENT_GET_IMPLEMENTATION_ID( OComponentProxyAggregation )

    //-------------------------------------------------------------------------
    Sequence< Type > SAL_CALL OComponentProxyAggregation::getTypes(  ) throw (RuntimeException)
    {
        Sequence< Type > aTypes( OComponentProxyAggregationHelper::getTypes() );

        // append XComponent, coming from OComponentProxyAggregation_CBase
        sal_Int32 nLen = aTypes.getLength();
        aTypes.realloc( nLen + 1 );
        aTypes[ nLen ] = ::getCppuType( static_cast< Reference< XComponent >* >( NULL ) );

        return aTypes;
    }

    //-------------------------------------------------------------------------
    void OComponentProxyAggregation::implEnsureDisposeInDtor( )
    {
        if ( !rBHelper.bDisposed )
        {
            acquire();  // to prevent duplicate dtor calls
            dispose();
        }
    }

    //--------------------------------------------------------------------
    void SAL_CALL OComponentProxyAggregation::disposing( const EventObject& _rSource ) throw (RuntimeException)
    {
        // simly disambiguate - this is necessary for MSVC to distinguish
        // "disposing( EventObject )" from "disposing()"
        OComponentProxyAggregationHelper::disposing( _rSource );
    }

    //--------------------------------------------------------------------
    void SAL_CALL OComponentProxyAggregation::disposing()  throw (RuntimeException)
    {
        // call the dispose-functionality of the base, which will dispose our aggregated component
        OComponentProxyAggregationHelper::dispose();
    }

    //--------------------------------------------------------------------
    void SAL_CALL OComponentProxyAggregation::dispose() throw( RuntimeException )
    {
        // simply disambiguate
        OComponentProxyAggregation_CBase::dispose();
    }


//.............................................................................
}   // namespace comphelper
//.............................................................................