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diff --git a/forms/source/xforms/convert.hxx b/forms/source/xforms/convert.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_FORMS_SOURCE_XFORMS_CONVERT_HXX
+#define INCLUDED_FORMS_SOURCE_XFORMS_CONVERT_HXX
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <map>
+
+namespace com::sun::star::uno
+{
+    class Any;
+    class Type;
+}
+
+namespace xforms
+{
+
+struct TypeLess
+{
+    bool operator()( const css::uno::Type& rType1,
+                     const css::uno::Type& rType2 ) const
+    { return rType1.getTypeName() < rType2.getTypeName(); }
+};
+
+class Convert
+{
+    // hold conversion objects
+    typedef OUString (*fn_toXSD)( const css::uno::Any& );
+    typedef css::uno::Any (*fn_toAny)( const OUString& );
+    typedef std::pair<fn_toXSD,fn_toAny> Convert_t;
+    typedef std::map<css::uno::Type, Convert_t, TypeLess> Map_t;
+    Map_t maMap;
+
+    Convert();
+
+    void init();
+
+public:
+    /** get/create Singleton class */
+    static Convert& get();
+
+    /// can we convert this type?
+    bool hasType( const css::uno::Type& );
+
+    /// get list of convertible types
+    css::uno::Sequence<css::uno::Type> getTypes() const;
+
+    /// convert any to XML representation
+    OUString toXSD( const css::uno::Any& rAny );
+
+    /// convert XML representation to Any of given type
+    css::uno::Any toAny( const OUString&, const css::uno::Type& );
+
+    /** replace all sequences of 0x08, 0x0A, 0x0D, 0x20 with a single 0x20.
+        also strip leading/trailing whitespace.
+    */
+    static OUString collapseWhitespace( const OUString& _rString );
+};
+
+} // namespace xforms
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */