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diff --git a/reportdesign/source/core/inc/Function.hxx b/reportdesign/source/core/inc/Function.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_REPORTDESIGN_SOURCE_CORE_INC_FUNCTION_HXX
+#define INCLUDED_REPORTDESIGN_SOURCE_CORE_INC_FUNCTION_HXX
+
+#include <comphelper/uno3.hxx>
+#include <cppuhelper/propertysetmixin.hxx>
+#include <com/sun/star/report/XFunction.hpp>
+#include <com/sun/star/report/XFunctions.hpp>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+namespace reportdesign
+{
+    typedef ::cppu::PropertySetMixin<        css::report::XFunction  > FunctionPropertySet;
+    typedef ::cppu::WeakComponentImplHelper<    css::report::XFunction
+                                                ,css::lang::XServiceInfo > FunctionBase;
+
+    /** \class OFunction Defines the implementation of a \interface com:::sun::star::report::XFunction
+     * \ingroup reportdesign_api
+     *
+     */
+    class OFunction :   public cppu::BaseMutex,
+                            public FunctionBase,
+                            public FunctionPropertySet
+    {
+        css::beans::Optional< OUString> m_sInitialFormula;
+        css::uno::WeakReference< css::report::XFunctions >  m_xParent;
+        OUString m_sName;
+        OUString m_sFormula;
+        bool     m_bPreEvaluated;
+        bool     m_bDeepTraversing;
+    private:
+        OFunction(const OFunction&) = delete;
+        OFunction& operator=(const OFunction&) = delete;
+
+        template <typename T> void set(  const OUString& _sProperty
+                                        ,const T& Value
+                                        ,T& _member)
+        {
+            BoundListeners l;
+            {
+                ::osl::MutexGuard aGuard(m_aMutex);
+                prepareSet(_sProperty, css::uno::Any(_member), css::uno::Any(Value), &l);
+                _member = Value;
+            }
+            l.notify();
+        }
+        void set(  const OUString& _sProperty
+                  ,bool Value
+                  ,bool& _member)
+        {
+            BoundListeners l;
+            {
+                ::osl::MutexGuard aGuard(m_aMutex);
+                prepareSet(_sProperty, css::uno::Any(_member), css::uno::Any(Value), &l);
+                _member = Value;
+            }
+            l.notify();
+        }
+    protected:
+        virtual ~OFunction() override;
+    public:
+        explicit OFunction(css::uno::Reference< css::uno::XComponentContext > const & _xContext);
+
+        DECLARE_XINTERFACE( )
+        // css::lang::XServiceInfo
+        virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+        virtual OUString SAL_CALL getImplementationName(  ) override;
+        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames(  ) override;
+
+        /// @throws css::uno::RuntimeException
+        static css::uno::Sequence< OUString > getSupportedServiceNames_Static();
+        /// @throws css::uno::RuntimeException
+        static OUString getImplementationName_Static();
+        static css::uno::Reference< css::uno::XInterface >
+            create(css::uno::Reference< css::uno::XComponentContext > const & xContext);
+        // css::beans::XPropertySet
+        virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo(  ) override;
+        virtual void SAL_CALL setPropertyValue( const OUString& aPropertyName, const css::uno::Any& aValue ) override;
+        virtual css::uno::Any SAL_CALL getPropertyValue( const OUString& PropertyName ) override;
+        virtual void SAL_CALL addPropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener ) override;
+        virtual void SAL_CALL removePropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& aListener ) override;
+        virtual void SAL_CALL addVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+        virtual void SAL_CALL removeVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+
+        // css::report::XFunction:
+        virtual sal_Bool SAL_CALL getPreEvaluated() override;
+        virtual void SAL_CALL setPreEvaluated(sal_Bool the_value) override;
+        virtual sal_Bool SAL_CALL getDeepTraversing() override;
+        virtual void SAL_CALL setDeepTraversing(sal_Bool the_value) override;
+        virtual OUString SAL_CALL getName() override;
+        virtual void SAL_CALL setName(const OUString & the_value) override;
+        virtual OUString SAL_CALL getFormula() override;
+        virtual void SAL_CALL setFormula(const OUString & the_value) override;
+        virtual css::beans::Optional< OUString> SAL_CALL getInitialFormula() override;
+        virtual void SAL_CALL setInitialFormula(const css::beans::Optional< OUString> & the_value) override;
+
+        // XComponent
+        virtual void SAL_CALL dispose() override;
+        virtual void SAL_CALL addEventListener(const css::uno::Reference< css::lang::XEventListener > & aListener) override
+        {
+            cppu::WeakComponentImplHelperBase::addEventListener(aListener);
+        }
+        virtual void SAL_CALL removeEventListener(const css::uno::Reference< css::lang::XEventListener > & aListener) override
+        {
+            cppu::WeakComponentImplHelperBase::removeEventListener(aListener);
+        }
+
+        // XChild
+        virtual css::uno::Reference< css::uno::XInterface > SAL_CALL getParent(  ) override;
+        virtual void SAL_CALL setParent( const css::uno::Reference< css::uno::XInterface >& Parent ) override;
+    };
+}
+#endif // INCLUDED_REPORTDESIGN_SOURCE_CORE_INC_FUNCTION_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */