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diff --git a/include/connectivity/warningscontainer.hxx b/include/connectivity/warningscontainer.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_WARNINGSCONTAINER_HXX
+#define INCLUDED_CONNECTIVITY_WARNINGSCONTAINER_HXX
+
+#include <connectivity/dbtoolsdllapi.hxx>
+
+#include <com/sun/star/uno/Reference.hxx>
+
+namespace com::sun::star::sdbc { class SQLException; }
+namespace com::sun::star::sdbc { class SQLWarning; }
+namespace com::sun::star::sdbc { class XWarningsSupplier; }
+namespace com::sun::star::sdb { class SQLContext; }
+namespace com::sun::star::uno { class XInterface; }
+
+namespace dbtools
+{
+
+    /** helper class for implementing XWarningsSupplier, which mixes own warnings with
+        warnings obtained from an external instance
+    */
+    class OOO_DLLPUBLIC_DBTOOLS WarningsContainer
+    {
+    private:
+        css::uno::Reference< css::sdbc::XWarningsSupplier >   m_xExternalWarnings;
+        css::uno::Any                                         m_aOwnWarnings;
+
+    public:
+        WarningsContainer() {}
+        WarningsContainer( const css::uno::Reference< css::sdbc::XWarningsSupplier >& _rxExternalWarnings )
+            :m_xExternalWarnings( _rxExternalWarnings ) {}
+
+        void setExternalWarnings( const css::uno::Reference< css::sdbc::XWarningsSupplier >& _rxExternalWarnings )
+        {
+            m_xExternalWarnings = _rxExternalWarnings;
+        }
+
+        // convenience
+        /** appends an SQLWarning instance to the chain
+            @param  _rWarning
+                the warning message
+            @param  _pAsciiSQLState
+                the SQLState of the warning
+            @param  _rxContext
+                the context of the warning
+        */
+        void appendWarning(
+            const OUString& _rWarning,
+            const char* _pAsciiSQLState,
+            const css::uno::Reference< css::uno::XInterface >& _rxContext );
+
+        void appendWarning(const css::sdbc::SQLException& _rWarning);
+        void appendWarning(const css::sdbc::SQLWarning& _rWarning);
+        void appendWarning(const css::sdb::SQLContext& _rContext);
+
+        // XWarningsSupplier equivalents
+        css::uno::Any getWarnings(  ) const;
+        void clearWarnings(  );
+    };
+
+
+}   // namespace dbtools
+
+
+#endif // INCLUDED_CONNECTIVITY_WARNINGSCONTAINER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */