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module com { module sun { module star { module uno {
/** Objects which implement this interface can become aggregates of
a delegator .
< p > That means if an object " A " aggregates " B " , " A " can provide all
or some of the interfaces of " B " . Whenever the method
XInterface : : queryInterface ( )
is called on either of the objects , the call will be forwarded
to object " A " . Object " A " now can determine whether to use the
interfaces of " A " or " B " or neither . Actually , any number of
aggregates can be used , even nested ones ( aggregated objects which are
delegators by themselves ) .
< p > The following rules are to be observed :
< ol >
< li > All calls to XInterface : : acquire ( )
which are made before the delegator was set ( using the method
XAggregation : : setDelegator ( ) ) must not be taken back
( using the method XInterface : : release ( ) )
before the delegation is removed by calling
< code > xAggregation - & gt ; setDelegator ( NULL ) < / code > .
< li > The constructor of a delegator has to increment its
own reference count by calling its method
XInterface : : acquire ( )
before it sets itself to any aggregate using the method
XAggregation : : setDelegator ( ) . After that
call it has to reset its own reference count without the
destructor getting called .
< li > The destructor of a delegator has to reset the delegator in
its aggregated objects by calling their method
XAggregation : : setDelegator ( ) with
NULL before it releases its reference to
its aggregated objects .
< / ol >
@ deprecated
Aggregation will no longer be supported as a high - level concept of UNO .
You may still have the option to implement a UNO object consisting of
several single objects in your specific programming language , though this
depends on your programming language .
*/
published interface XAggregation: com::sun::star::uno::XInterface
{
/** sets the object to which all calls to the method
XInterface : : queryInterface ( )
have to be forwarded .
@ param pDelegator
specifies the object which handles the calls to
XInterface : : queryInterface ( ) .
If < var > pDelegator < / var > is NULL , the delegator is
removed and thus the object becomes its own delegator and has
to handle calls to the method
XInterface : : queryInterface ( )
itself .
@ see XAggregation : : queryAggregation
*/
void setDelegator( [in] com::sun::star::uno::XInterface pDelegator );
/** is similar to XInterface::queryInterface(),
but it is to be processed directly without being forwarded to the
delegator .
< p > This method is only called from within an implementation of
XInterface : : queryInterface ( )
or XAggregation : : queryAggregation ( ) . This method
is to be called by the delegator if it does not implement the
interface itself . An object which got aggregated cannot depend
on getting its own interface when it calls the method
XInterface : : queryInterface ( ) .
@ see XAggregation : : setDelegator
*/
any queryAggregation( [in] type aType );
};
}; }; }; };
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