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#ifndef _CPPUHELPER_WEAKAGG_HXX_
#define _CPPUHELPER_WEAKAGG_HXX_
#include <cppuhelper/weak.hxx>
#include <com/sun/star/uno/XAggregation.hpp>
namespace cppu
{
/** Base class to implement an UNO object supporting weak references, i.e. the object can be held
weakly (by a ::com::sun::star::uno::WeakReference) and aggregation, i.e. the object can be
aggregated by another (delegator).
This implementation copes with reference counting. Upon last release(), the virtual dtor
is called.
@derive
Inherit from this class and delegate acquire()/ release() calls. Re-implement
XAggregation::queryInterface().
*/
class OWeakAggObject
: public ::cppu::OWeakObject
, public ::com::sun::star::uno::XAggregation
{
public:
/** Constructor. No delegator set.
*/
inline OWeakAggObject() SAL_THROW( () )
{}
/** If a delegator is set, then the delegators gets acquired. Otherwise call is delegated to
base class ::cppu::OWeakObject.
*/
virtual void SAL_CALL acquire() throw();
/** If a delegator is set, then the delegators gets released. Otherwise call is delegated to
base class ::cppu::OWeakObject.
*/
virtual void SAL_CALL release() throw();
/** If a delegator is set, then the delegator is queried for the demanded interface. If the
delegator cannot provide the demanded interface, it calls queryAggregation() on its
aggregated objects.
@param rType demanded interface type
@return demanded type or empty any
@see queryAggregation.
*/
virtual ::com::sun::star::uno::Any SAL_CALL queryInterface( const ::com::sun::star::uno::Type & rType )
throw(::com::sun::star::uno::RuntimeException);
/** Set the delegator. The delegator member reference is a weak reference.
@param Delegator the object that delegate its queryInterface to this aggregate.
*/
virtual void SAL_CALL setDelegator( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > & Delegator )
throw(::com::sun::star::uno::RuntimeException);
/** Called by the delegator or queryInterface. Re-implement this method instead of
queryInterface.
@see queryInterface
*/
virtual ::com::sun::star::uno::Any SAL_CALL queryAggregation( const ::com::sun::star::uno::Type & rType )
throw(::com::sun::star::uno::RuntimeException);
protected:
/** Virtual dtor. Called when reference count is 0.
@attention
Despite the fact that a RuntimeException is allowed to be thrown, you must not throw any
exception upon destruction!
*/
virtual ~OWeakAggObject() SAL_THROW( (::com::sun::star::uno::RuntimeException) );
/** weak reference to delegator.
*/
::com::sun::star::uno::WeakReferenceHelper xDelegator;
private:
/** @internal */
OWeakAggObject( const OWeakAggObject & rObj ) SAL_THROW( () );
/** @internal */
OWeakAggObject & operator = ( const OWeakAggObject & rObj ) SAL_THROW( () );
};
}
#endif
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