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diff --git a/ucb/source/ucp/hierarchy/hierarchydatasupplier.hxx b/ucb/source/ucp/hierarchy/hierarchydatasupplier.hxx
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+++ b/ucb/source/ucp/hierarchy/hierarchydatasupplier.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_UCB_SOURCE_UCP_HIERARCHY_HIERARCHYDATASUPPLIER_HXX
+#define INCLUDED_UCB_SOURCE_UCP_HIERARCHY_HIERARCHYDATASUPPLIER_HXX
+
+#include <rtl/ref.hxx>
+#include <ucbhelper/resultset.hxx>
+#include <memory>
+
+namespace hierarchy_ucp {
+
+class HierarchyEntryData;
+struct DataSupplier_Impl;
+class HierarchyContent;
+
+class HierarchyResultSetDataSupplier :
+        public ::ucbhelper::ResultSetDataSupplier
+{
+    std::unique_ptr<DataSupplier_Impl>  m_pImpl;
+
+private:
+    bool checkResult( const HierarchyEntryData& rResult );
+
+public:
+    HierarchyResultSetDataSupplier(
+                    const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                    const rtl::Reference< HierarchyContent >& rContent,
+                    sal_Int32 nOpenMode );
+    virtual ~HierarchyResultSetDataSupplier() override;
+
+    virtual OUString queryContentIdentifierString( sal_uInt32 nIndex ) override;
+    virtual css::uno::Reference< css::ucb::XContentIdentifier >
+    queryContentIdentifier( sal_uInt32 nIndex ) override;
+    virtual css::uno::Reference< css::ucb::XContent >
+    queryContent( sal_uInt32 nIndex ) override;
+
+    virtual bool getResult( sal_uInt32 nIndex ) override;
+
+    virtual sal_uInt32 totalCount() override;
+    virtual sal_uInt32 currentCount() override;
+    virtual bool isCountFinal() override;
+
+    virtual css::uno::Reference< css::sdbc::XRow >
+    queryPropertyValues( sal_uInt32 nIndex  ) override;
+    virtual void releasePropertyValues( sal_uInt32 nIndex ) override;
+
+    virtual void close() override;
+
+    virtual void validate() override;
+};
+
+} // namespace hierarchy_ucp
+
+#endif // INCLUDED_UCB_SOURCE_UCP_HIERARCHY_HIERARCHYDATASUPPLIER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */