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diff --git a/sot/source/unoolestorage/xolesimplestorage.hxx b/sot/source/unoolestorage/xolesimplestorage.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_SOT_SOURCE_UNOOLESTORAGE_XOLESIMPLESTORAGE_HXX
+#define INCLUDED_SOT_SOURCE_UNOOLESTORAGE_XOLESIMPLESTORAGE_HXX
+
+#include <sal/config.h>
+
+#include <memory>
+
+#include <comphelper/interfacecontainer3.hxx>
+#include <com/sun/star/embed/XOLESimpleStorage.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+
+#include <osl/mutex.hxx>
+
+namespace com::sun::star::container { class XNameAccess; }
+namespace com::sun::star::io { class XInputStream; }
+namespace com::sun::star::io { class XStream; }
+namespace com::sun::star::lang { class XEventListener; }
+namespace com::sun::star::uno { class XComponentContext; }
+
+class BaseStorage;
+class SvStream;
+
+class OLESimpleStorage : public cppu::WeakImplHelper<css::embed::XOLESimpleStorage, css::lang::XServiceInfo>
+{
+    ::osl::Mutex m_aMutex;
+
+    bool m_bDisposed;
+
+    css::uno::Reference< css::io::XStream > m_xStream;
+    css::uno::Reference< css::io::XStream > m_xTempStream;
+    std::unique_ptr<SvStream> m_pStream;
+    std::unique_ptr<BaseStorage> m_pStorage;
+
+    ::comphelper::OInterfaceContainerHelper3<css::lang::XEventListener>* m_pListenersContainer; // list of listeners
+    css::uno::Reference<css::uno::XComponentContext> m_xContext;
+
+    bool m_bNoTemporaryCopy;
+
+    void UpdateOriginal_Impl();
+
+    /// @throws css::uno::Exception
+    static void InsertInputStreamToStorage_Impl( BaseStorage* pStorage, const OUString & aName, const css::uno::Reference< css::io::XInputStream >& xInputStream );
+
+    /// @throws css::uno::Exception
+    static void InsertNameAccessToStorage_Impl( BaseStorage* pStorage, const OUString & aName, const css::uno::Reference< css::container::XNameAccess >& xNameAccess );
+
+public:
+
+    OLESimpleStorage(css::uno::Reference<css::uno::XComponentContext> xContext,
+            css::uno::Sequence<css::uno::Any> const &arguments);
+
+    virtual ~OLESimpleStorage() override;
+
+    //  XNameContainer
+
+    virtual void SAL_CALL insertByName( const OUString& aName, const css::uno::Any& aElement ) override;
+
+    virtual void SAL_CALL removeByName( const OUString& Name ) override;
+
+    virtual void SAL_CALL replaceByName( const OUString& aName, const css::uno::Any& aElement ) override;
+
+    virtual css::uno::Any SAL_CALL getByName( const OUString& aName ) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL getElementNames() override;
+
+    virtual sal_Bool SAL_CALL hasByName( const OUString& aName ) override;
+
+    virtual css::uno::Type SAL_CALL getElementType() override;
+
+    virtual sal_Bool SAL_CALL hasElements() override;
+
+    //  XComponent
+
+    virtual void SAL_CALL dispose() final override;
+
+    virtual void SAL_CALL addEventListener(
+            const css::uno::Reference< css::lang::XEventListener >& xListener ) override;
+
+    virtual void SAL_CALL removeEventListener(
+            const css::uno::Reference< css::lang::XEventListener >& xListener ) override;
+
+    //  XTransactedObject
+
+    virtual void SAL_CALL commit() override;
+
+    virtual void SAL_CALL revert() override;
+
+    //  XClassifiedObject
+
+    virtual css::uno::Sequence< ::sal_Int8 > SAL_CALL getClassID() override;
+
+    virtual OUString SAL_CALL getClassName() override;
+
+    virtual void SAL_CALL setClassInfo( const css::uno::Sequence< ::sal_Int8 >& aClassID,
+                                        const OUString& sClassName ) override;
+
+    //  XServiceInfo
+
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */