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diff --git a/framework/source/inc/accelerators/acceleratorcache.hxx b/framework/source/inc/accelerators/acceleratorcache.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 .
+ */
+
+#ifndef INCLUDED_FRAMEWORK_SOURCE_INC_ACCELERATORS_ACCELERATORCACHE_HXX
+#define INCLUDED_FRAMEWORK_SOURCE_INC_ACCELERATORS_ACCELERATORCACHE_HXX
+
+#include <stdtypes.h>
+
+#include <com/sun/star/awt/KeyEvent.hpp>
+
+#include <unordered_map>
+#include <vector>
+
+// definition
+
+namespace framework
+{
+
+/**
+    @short  implements a cache for any accelerator configuration.
+
+    @descr  It's implemented threadsafe, supports copy-on-write pattern
+            and a flush mechanism to support concurrent access to the same
+            configuration.
+
+            copy-on-write ... How? Do the following:
+ */
+class AcceleratorCache
+{
+
+    // const, types
+
+    public:
+
+        /** TODO document me
+            commands -> keys
+        */
+        typedef ::std::vector< css::awt::KeyEvent > TKeyList;
+        typedef std::unordered_map<OUString, TKeyList> TCommand2Keys;
+
+        /** TODO document me
+            keys -> commands
+        */
+        typedef std::unordered_map< css::awt::KeyEvent ,
+                                    OUString    ,
+                                    KeyEventHashCode   ,
+                                    KeyEventEqualsFunc > TKey2Commands;
+
+    // member
+
+    private:
+
+        /** map commands to keys in relation 1:n.
+            First key is interpreted as preferred one! */
+        TCommand2Keys m_lCommand2Keys;
+
+        /** map keys to commands in relation 1:1. */
+        TKey2Commands m_lKey2Commands;
+
+    // interface
+
+    public:
+        /** @short  checks if the specified key exists.
+
+            @param  aKey
+                    the key, which should be checked.
+
+            @return [bool]
+                    sal_True if the specified key exists inside this container.
+         */
+        bool hasKey(const css::awt::KeyEvent& aKey) const;
+        bool hasCommand(const OUString& sCommand) const;
+
+        /** TODO document me */
+        TKeyList getAllKeys() const;
+
+        /** @short  add a new or change an existing key-command pair
+                    of this container.
+
+            @param  aKey
+                    describe the key.
+
+            @param  sCommand
+                    describe the command.
+          */
+        void setKeyCommandPair(const css::awt::KeyEvent& aKey    ,
+                                       const OUString&    sCommand);
+
+        /** @short  returns the list of keys, which are registered
+                    for this command.
+
+            @param  sCommand
+                    describe the command.
+
+            @return [TKeyList]
+                    the list of registered keys. Can be empty!
+          */
+        TKeyList getKeysByCommand(const OUString& sCommand) const;
+
+        /** TODO */
+        OUString getCommandByKey(const css::awt::KeyEvent& aKey) const;
+
+        /** TODO */
+        void removeKey(const css::awt::KeyEvent& aKey);
+        void removeCommand(const OUString& sCommand);
+};
+
+} // namespace framework
+
+#endif // INCLUDED_FRAMEWORK_SOURCE_INC_ACCELERATORS_ACCELERATORCACHE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */