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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, 2011 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 VBAHELPER_WEAKREFERENCE_HXX
#define VBAHELPER_WEAKREFERENCE_HXX
#include <cppuhelper/weakref.hxx>
#include <rtl/ref.hxx>
namespace vbahelper {
// ============================================================================
/** A weak reference holding any UNO implementation object.
The held object must implement the ::com::sun::star::uno::XWeak interface.
In difference to the ::com::sun::star::uno::WeakReference<> implementation
from cppuhelper/weakref.hxx, the class type of this weak reference is not
restricted to UNO interface types, but can be used for any C++ class type
implementing the XWeak interface somehow (e.g. ::cppu::WeakImplHelperN<>,
::cppu::ImplInheritanceHelperN<>, etc.).
*/
template< typename ObjectType >
class WeakReference
{
public:
/** Default constructor. Creates an empty weak reference.
*/
inline explicit WeakReference() SAL_THROW( () ) : mpObject( 0 ) {}
/** Initializes this weak reference with the passed reference to an object.
*/
inline explicit WeakReference( const ::rtl::Reference< ObjectType >& rxObject ) SAL_THROW( () ) :
mxWeakRef( rxObject.get() ), mpObject( rxObject.get() ) {}
/** Releases this weak reference and takes over the passed reference.
*/
inline WeakReference& SAL_CALL operator=( const ::rtl::Reference< ObjectType >& rxObject ) SAL_THROW( () )
{
mxWeakRef = ::com::sun::star::uno::Reference< ::com::sun::star::uno::XWeak >( rxObject.get() );
mpObject = rxObject.get();
return *this;
}
/** Gets an RTL reference to the referenced object.
@return Reference or null, if the weakly referenced object is gone.
*/
inline SAL_CALL operator ::rtl::Reference< ObjectType >() SAL_THROW( () )
{
::com::sun::star::uno::Reference< ::com::sun::star::uno::XWeak > xRef = mxWeakRef;
::rtl::Reference< ObjectType > xObject;
if( xRef.is() )
xObject = mpObject;
else
mpObject = 0;
return xObject;
}
private:
::com::sun::star::uno::WeakReference< ::com::sun::star::uno::XWeak > mxWeakRef;
ObjectType* mpObject;
};
// ============================================================================
} // namespace vbahelper
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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