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+/*************************************************************************
+ *
+ * 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