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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* 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.
*
************************************************************************/
#ifndef __com_sun_star_uno_XAggregation_idl__
#define __com_sun_star_uno_XAggregation_idl__
#include <com/sun/star/uno/XInterface.idl>
//=============================================================================
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
<member>XInterface::queryInterface()</member>
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 <member>XInterface::acquire()</member>
which are made before the delegator was set (using the method
<member>XAggregation::setDelegator()</member>) must not be taken back
(using the method <member>XInterface::release()</member>)
before the delegation is removed by calling
<code>xAggregation->setDelegator(NULL)</code>.
<li>The constructor of a delegator has to increment its
own reference count by calling its method
<member>XInterface::acquire()</member>
before it sets itself to any aggregate using the method
<member>XAggregation::setDelegator()</member>. 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
<member>XAggregation::setDelegator()</member> with
<const>NULL</const> 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 an 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
<member>XInterface::queryInterface()</member>
have to be forwarded. @
@param xDelegator
specifies the object which handles the calls to
<member>XInterface::queryInterface()</member>.
If <var>xDelegator</var> is <const>NULL</const>, the delegator is
removed and thus the object becomes its own delegator and has
to handle calls to the method
<member>XInterface::queryInterface()</member>
itself.
@see XAggregation::queryAggregation
*/
void setDelegator( [in] com::sun::star::uno::XInterface pDelegator );
//-------------------------------------------------------------------------
/** is similar to <member>XInterface::queryInterface()</member>,
but it is to be processed directly without being forwarded to the
delegator. @
<p>This method is only called from within an implementation of
<member>XInterface::queryInterface()</member>
or <member>XAggregation::queryAggregation()</member>. 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
<member>XInterface::queryInterface()</member>.
@see XAggregation::setDelegator
*/
any queryAggregation( [in] type aType );
};
//=============================================================================
}; }; }; };
#endif
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