proxyaggregation.cxx

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#include <sal/config.h>
 
#include <cassert>
 
#include <comphelper/proxyaggregation.hxx>
#include <com/sun/star/reflection/ProxyFactory.hpp>
 
 
namespace comphelper
{
 
 
    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star::reflection;
 
    OProxyAggregation::OProxyAggregation( const Reference< XComponentContext >& _rxContext )
        :m_xContext( _rxContext )
    {
    }
 
 
    void OProxyAggregation::baseAggregateProxyFor( const Reference< XInterface >& _rxComponent, oslInterlockedCount& _rRefCount,
            ::cppu::OWeakObject& _rDelegator )
    {
        // first a factory for the proxy
        Reference< XProxyFactory > xFactory = ProxyFactory::create( m_xContext );
 
        // then the proxy itself
        { // i36686 OJ: achieve the destruction of the temporary -> otherwise it leads to _rRefCount -= 2
            m_xProxyAggregate = xFactory->createProxy( _rxComponent );
        }
        if ( m_xProxyAggregate.is() )
            m_xProxyAggregate->queryAggregation( cppu::UnoType<decltype(m_xProxyTypeAccess)>::get() ) >>= m_xProxyTypeAccess;
 
        // aggregate the proxy
        osl_atomic_increment( &_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_atomic_decrement( &_rRefCount );
    }
 
 
    Any SAL_CALL OProxyAggregation::queryAggregation( const Type& _rType )
    {
        return m_xProxyAggregate.is() ? m_xProxyAggregate->queryAggregation( _rType ) : Any();
    }
 
 
    Sequence< Type > SAL_CALL OProxyAggregation::getTypes(  )
    {
        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( nullptr );
        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( const Reference< XComponentContext >& _rxContext,
        ::cppu::OBroadcastHelper& _rBHelper )
        :OProxyAggregation( _rxContext )
        ,m_rBHelper( _rBHelper )
    {
        OSL_ENSURE( _rxContext.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, _rRefCount, _rDelegator );
 
        // add as event listener to the inner context, because we want to be notified of disposals
        osl_atomic_increment( &_rRefCount );
        {
            if ( m_xInner.is() )
                m_xInner->addEventListener( this );
        }
        osl_atomic_decrement( &_rRefCount );
    }
 
 
    Any SAL_CALL OComponentProxyAggregationHelper::queryInterface( const Type& _rType )
    {
        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 )
    {
        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()
    {
        ::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
        if ( m_xInner.is() )
        {
            m_xInner->removeEventListener( this );
            m_xInner->dispose();
            m_xInner.clear();
        }
    }
 
    OComponentProxyAggregation::OComponentProxyAggregation( const Reference< XComponentContext >& _rxContext,
            const Reference< XComponent >& _rxComponent )
        :WeakComponentImplHelperBase( m_aMutex )
        ,OComponentProxyAggregationHelper( _rxContext, rBHelper )
    {
        OSL_ENSURE( _rxComponent.is(), "OComponentProxyAggregation::OComponentProxyAggregation: accessible is no XComponent!" );
        if ( _rxComponent.is() )
            componentAggregateProxyFor( _rxComponent, m_refCount, *this );
    }
 
 
    OComponentProxyAggregation::~OComponentProxyAggregation()
    {
        if ( !rBHelper.bDisposed )
        {
            acquire();  // to prevent duplicate dtor calls
            dispose();
        }
    }
 
 
    IMPLEMENT_FORWARD_XINTERFACE2( OComponentProxyAggregation, WeakComponentImplHelperBase, OComponentProxyAggregationHelper )
 
 
    IMPLEMENT_GET_IMPLEMENTATION_ID( OComponentProxyAggregation )
 
 
    Sequence< Type > SAL_CALL OComponentProxyAggregation::getTypes(  )
    {
        return comphelper::concatSequences(
                OComponentProxyAggregationHelper::getTypes(),
                // append XComponent, coming from WeakComponentImplHelperBase
                Sequence { cppu::UnoType<XComponent>::get() });
    }
 
 
    void SAL_CALL OComponentProxyAggregation::disposing( const EventObject& _rSource )
    {
        // Simply disambiguate---this is necessary for MSVC to distinguish
        // "disposing(EventObject)" from "disposing()"; but it is also a good
        // place to check for recursive calls that would be caused by an object
        // being registered as an XEventListener at itself (cf. rhbz#928568):
        assert(_rSource.Source != static_cast< cppu::OWeakObject * >(this));
        OComponentProxyAggregationHelper::disposing( _rSource );
    }
 
 
    void SAL_CALL OComponentProxyAggregation::disposing()
    {
        // call the dispose-functionality of the base, which will dispose our aggregated component
        OComponentProxyAggregationHelper::dispose();
    }
 
 
    void SAL_CALL OComponentProxyAggregation::dispose()
    {
        // simply disambiguate
        WeakComponentImplHelperBase::dispose();
    }
 
 
}   // namespace comphelper
 
 
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