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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#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;
+};
+
+/** Implements an acyclic visitor pattern. This is the abstract
+    base for the classes to be processed (the "visitables").
+*/
+class ProcessorClient
+{
+  public:
+    virtual             ~ProcessorClient() {}
+
+    void                Accept(
+                            ProcessorIfc &  io_processor )
+                            { do_Accept(io_processor); }
+  private:
+    virtual void        do_Accept(
+                            ProcessorIfc &  io_processor ) = 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);
+}
+
+template <class C>
+inline void
+AssertedCall( ProcessorIfc &  io_processor,
+              const C &       i_client )
+{
+    ConstProcessor<C> *
+        pProcessor = dynamic_cast< csv::ConstProcessor<C> * >
+                        (&io_processor);
+    csv_assert( pProcessor != 0
+                && "csv::AssertedCall() failed. Processed object did not match processor." );
+    pProcessor->Process(i_client);
+}
+
+template <class C>
+inline void
+AssertedCall( ProcessorIfc &  io_processor,
+              C &             io_client )
+{
+    Processor<C> *
+        pProcessor = dynamic_cast< csv::Processor<C> * >
+                        (&io_processor);
+    csv_assert( pProcessor != 0
+                && "csv::AssertedCall() failed. Processed object did not match processor." );
+    pProcessor->Process(io_client);
+}
+
+
+
+
+}   // namespace csv
+#endif