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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 CSV_TPL_PROCESSOR_HXX
-#define CSV_TPL_PROCESSOR_HXX
-
-// USED SERVICES
-
-
-
-
-namespace csv
-{
-
-
-/** Implements an acyclic visitor pattern. This is the abstract
- base for the classes doing the work (the "visitors").
-*/
-class ProcessorIfc
-{
- public:
- virtual ~ProcessorIfc() {}
-};
-
-
-
-/** Implements an acyclic visitor pattern. This is the abstract
- base for the classes to be processed (the "visitables").
-*/
-class ConstProcessorClient
-{
- public:
- virtual ~ConstProcessorClient() {}
-
- void Accept(
- ProcessorIfc & io_processor ) const
- { do_Accept(io_processor); }
- private:
- virtual void do_Accept(
- ProcessorIfc & io_processor ) const = 0;
-};
-
-
-/** Typed base for "visitor" classes, leaving the visited
- object const.
-
- @see ProcessorIfc
- @see Processor<>
-*/
-template <typename X, typename R = void>
-class ConstProcessor
-{
- public:
- virtual ~ConstProcessor() {}
-
- R Process(
- const X & i_object )
- { return do_Process(i_object ); }
- private:
- virtual R do_Process(
- const X & i_object ) = 0;
-};
-
-
-/** Typed base for "visitor" classes which may change the visited
- object.
-
- @see ProcessorIfc
- @see ConstProcessor<>
-*/
-template <typename X, typename R = void>
-class Processor
-{
- public:
- virtual ~Processor() {}
-
- R Process(
- X & i_object )
- { return do_Process(i_object ); }
- private:
- virtual R do_Process(
- X & i_object ) = 0;
-};
-
-
-template <class C>
-inline void
-CheckedCall( ProcessorIfc & io_processor,
- const C & i_client )
-{
- ConstProcessor<C> *
- pProcessor = dynamic_cast< csv::ConstProcessor<C> * >
- (&io_processor);
- if (pProcessor != 0)
- pProcessor->Process(i_client);
-}
-
-template <class C>
-inline void
-CheckedCall( ProcessorIfc & io_processor,
- C & io_client )
-{
- Processor<C> *
- pProcessor = dynamic_cast< csv::Processor<C> * >
- (&io_processor);
- if (pProcessor != 0)
- pProcessor->Process(io_client);
-}
-
-} // namespace csv
-#endif
-
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */