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diff --git a/include/cppuhelper/weakagg.hxx b/include/cppuhelper/weakagg.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/*
+ * This file is part of LibreOffice published API.
+ */
+#ifndef INCLUDED_CPPUHELPER_WEAKAGG_HXX
+#define INCLUDED_CPPUHELPER_WEAKAGG_HXX
+
+#include "cppuhelper/weak.hxx"
+#include "cppuhelper/weakref.hxx"
+#include "com/sun/star/uno/XAggregation.hpp"
+#include "cppuhelper/cppuhelperdllapi.h"
+
+
+namespace cppu
+{
+
+/** Base class to implement a UNO object supporting weak references, i.e. the object can be held
+    weakly (by a css::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 CPPUHELPER_DLLPUBLIC OWeakAggObject
+    : public ::cppu::OWeakObject
+    , public css::uno::XAggregation
+{
+public:
+    /** Constructor.  No delegator set.
+    */
+    OWeakAggObject()
+        {}
+
+    /** If a delegator is set, then the delegators gets acquired.  Otherwise call is delegated to
+        base class ::cppu::OWeakObject.
+    */
+    virtual void SAL_CALL acquire() SAL_NOEXCEPT SAL_OVERRIDE;
+    /** If a delegator is set, then the delegators gets released.  Otherwise call is delegated to
+        base class ::cppu::OWeakObject.
+    */
+    virtual void SAL_CALL release() SAL_NOEXCEPT SAL_OVERRIDE;
+    /** 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 css::uno::Any SAL_CALL queryInterface( const css::uno::Type & rType ) SAL_OVERRIDE;
+
+    /** 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 css::uno::Reference< css::uno::XInterface > & Delegator ) SAL_OVERRIDE;
+    /** Called by the delegator or queryInterface. Re-implement this method instead of
+        queryInterface.
+
+        @see queryInterface
+    */
+    virtual css::uno::Any SAL_CALL queryAggregation( const css::uno::Type & rType ) SAL_OVERRIDE;
+
+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_OVERRIDE;
+
+    /** weak reference to delegator.
+    */
+    css::uno::WeakReferenceHelper xDelegator;
+private:
+    OWeakAggObject( const OWeakAggObject & rObj ) SAL_DELETED_FUNCTION;
+    OWeakAggObject & operator = ( const OWeakAggObject & rObj )
+        SAL_DELETED_FUNCTION;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */