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diff --git a/include/connectivity/dbcharset.hxx b/include/connectivity/dbcharset.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_CONNECTIVITY_DBCHARSET_HXX
+#define INCLUDED_CONNECTIVITY_DBCHARSET_HXX
+
+#include <sal/config.h>
+
+#include <set>
+
+#include <rtl/textenc.h>
+#include <rtl/tencinfo.h>
+#include <rtl/ustring.hxx>
+#include <connectivity/dbtoolsdllapi.hxx>
+
+
+namespace dbtools
+{
+
+
+    //= OCharsetMap
+
+    /** is a class which translates between different charset representations.
+
+        <p>The set of recognized charsets is very limited: only the ones which are database relevant are
+        implemented at the moment</p>
+
+        <p>Possible representations are:
+        <ul>
+            <li><b>IANA names.</b>
+            Have a look at <A href="http://www.iana.org/assignments/character-sets">this document</A> for
+            more details</li>
+            <li><b>rtl_TextEncoding</b></li>
+        </ul>
+        </p>
+    */
+    class OOO_DLLPUBLIC_DBTOOLS OCharsetMap
+    {
+    protected:
+        typedef std::set<rtl_TextEncoding> TextEncBag;
+
+        TextEncBag  m_aEncodings;
+
+    public:
+        class CharsetIterator;
+        friend class OCharsetMap::CharsetIterator;
+        typedef CharsetIterator iterator;
+        typedef CharsetIterator const_iterator;
+
+        OCharsetMap();
+        virtual ~OCharsetMap();
+
+        /** find the given text encoding in the map.
+            @return the <em>end</em> iterator if the encoding could not be found.
+        */
+        CharsetIterator find(const rtl_TextEncoding _eEncoding) const;
+        /** find the given IANA name in the map.
+            @return the <em>end</em> iterator if the IANA name could not be found.
+        */
+        CharsetIterator findIanaName(const OUString& _rIanaName) const;
+
+        /// get access to the first element of the charset collection
+        CharsetIterator begin() const;
+        /// get access to the (last + 1st) element of the charset collection
+        CharsetIterator end() const;
+
+    protected:
+        // needed because we want to call a virtual method during construction
+                void lateConstruct();
+        void ensureConstructed( ) const { if ( m_aEncodings.empty() ) const_cast< OCharsetMap* >( this )->lateConstruct(); }
+
+        virtual bool approveEncoding( const rtl_TextEncoding _eEncoding, const rtl_TextEncodingInfo& _rInfo ) const;
+    };
+
+
+    //- CharsetIteratorDerefHelper
+
+    class OOO_DLLPUBLIC_DBTOOLS CharsetIteratorDerefHelper
+    {
+        friend class OCharsetMap::CharsetIterator;
+
+        rtl_TextEncoding    m_eEncoding;
+        OUString     m_aIanaName;
+
+    public:
+        CharsetIteratorDerefHelper(const CharsetIteratorDerefHelper& _rSource);
+
+        rtl_TextEncoding    getEncoding() const { return m_eEncoding; }
+        const OUString&     getIanaName() const { return m_aIanaName; }
+
+    protected:
+        CharsetIteratorDerefHelper( const rtl_TextEncoding _eEncoding, const OUString& _rIanaName );
+
+    };
+
+
+    //- OCharsetMap::CharsetIterator
+
+    class OOO_DLLPUBLIC_DBTOOLS OCharsetMap::CharsetIterator
+    {
+        friend class OCharsetMap;
+
+        friend OOO_DLLPUBLIC_DBTOOLS bool operator==(const CharsetIterator& lhs, const CharsetIterator& rhs);
+        friend bool operator!=(const CharsetIterator& lhs, const CharsetIterator& rhs) { return !(lhs == rhs); }
+
+//      friend sal_Int32 operator-(const CharsetIterator& lhs, const CharsetIterator& rhs);
+
+    protected:
+        const OCharsetMap*                      m_pContainer;
+        OCharsetMap::TextEncBag::const_iterator m_aPos;
+
+    public:
+        CharsetIteratorDerefHelper operator*() const;
+        // no -> operator
+        // this would require us to a) store CharsetIteratorDerefHelper instances ourself so that we
+        // can return a pointer or b) introduce a -> operator on the CharsetIteratorDerefHelper, too.
+
+        /// prefix increment
+        const CharsetIterator&  operator++();
+
+        /// prefix decrement
+        const CharsetIterator&  operator--();
+
+    protected:
+        CharsetIterator(const OCharsetMap* _pContainer, OCharsetMap::TextEncBag::const_iterator const & _aPos );
+    };
+
+
+}   // namespace dbtools
+
+
+#endif // INCLUDED_CONNECTIVITY_DBCHARSET_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */