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diff --git a/filter/source/config/cache/cacheupdatelistener.hxx b/filter/source/config/cache/cacheupdatelistener.hxx
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+/*************************************************************************
+ *
+ * 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 __FILTER_CONFIG_CACHEUPDATELISTENER_HXX_
+#define __FILTER_CONFIG_CACHEUPDATELISTENER_HXX_
+
+//_______________________________________________
+// includes
+
+#include "filtercache.hxx"
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/util/XChangesListener.hpp>
+#include <salhelper/singletonref.hxx>
+#include <cppuhelper/implbase1.hxx>
+
+//_______________________________________________
+// namespace
+
+namespace filter{
+    namespace config{
+
+//_______________________________________________
+// definitions
+
+//_______________________________________________
+
+/** @short      implements a listener, which will update the
+                global filter cache, if the underlying configuration
+                wa changed by other processes.
+ */
+class CacheUpdateListener : public BaseLock // must be the first one to guarantee right initialized mutex member!
+                          , public ::cppu::WeakImplHelper1< css::util::XChangesListener >
+{
+    //-------------------------------------------
+    // member
+
+    private:
+
+        /** @short  reference to an uno service manager, which can be used
+                    to create own needed services. */
+        css::uno::Reference< css::lang::XMultiServiceFactory > m_xSMGR;
+
+        /** @short  reference to the singleton(!) filter cache implementation,
+                    which should be updated by this thread. */
+        ::salhelper::SingletonRef< FilterCache > m_rCache;
+
+        /** @short  holds the configuration access, where we listen alive. */
+        css::uno::Reference< css::uno::XInterface > m_xConfig;
+
+        /** @short  every instance of this update listener listen on
+                    a special sub set of the filter configuration.
+                    So it should know, which type of configuration entry
+                    it must put into the filter cache, if the configuration notifys changes ... */
+        FilterCache::EItemType m_eConfigType;
+
+    //-------------------------------------------
+    // native interface
+
+    public:
+
+        //---------------------------------------
+        // ctor/dtor
+
+        /** @short  initialize new instance of this class.
+
+            @descr  Listening wont be started here. It can be done
+                    by calling startListening() on this instance.
+
+            @see    startListening()
+
+            @param  xSMGR
+                    reference to a service manager, which can be used to create
+                    own needed uno services.
+
+            @param  xConfigAccess
+                    the configuration access, where this instance should listen for changes.
+
+            @param  eConfigType
+                    specify the type of configuration.
+         */
+        CacheUpdateListener(const css::uno::Reference< css::lang::XMultiServiceFactory >& xSMGR        ,
+                            const css::uno::Reference< css::uno::XInterface >&            xConfigAccess,
+                                  FilterCache::EItemType                                  eConfigType  );
+
+        //---------------------------------------
+
+        /** @short  standard dtor.
+         */
+        virtual ~CacheUpdateListener();
+
+        //---------------------------------------
+
+        /** @short  starts listening.
+         */
+        virtual void startListening();
+
+        //---------------------------------------
+
+        /** @short  stop listening.
+         */
+        virtual void stopListening();
+
+    //-------------------------------------------
+    // uno interface
+
+    public:
+
+        //---------------------------------------
+        // XChangesListener
+
+        virtual void SAL_CALL changesOccurred(const css::util::ChangesEvent& aEvent)
+            throw(css::uno::RuntimeException);
+
+        //---------------------------------------
+        // lang.XEventListener
+        virtual void SAL_CALL disposing(const css::lang::EventObject& aEvent)
+            throw(css::uno::RuntimeException);
+};
+
+    } // namespace config
+} // namespace filter
+
+#endif // __FILTER_CONFIG_CACHEUPDATELISTENER_HXX_