sgraphctx.h

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// Search Graph context implementation -*- C++ -*-

// $Id: sgraphctx.h 634 2008-05-20 14:28:14Z herman $
// Copyright (C) 2003 Hermann Schichl
//
// This file is part of the COCONUT API.  This library
// is free software; you can redistribute it and/or modify it under the
// terms of the Library GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library 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
// Library GNU General Public License for more details.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the Library GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the Library GNU General Public License.

#ifndef _SGRAPHCTX_H_
#define _SGRAPHCTX_H_

#include <list>
#include <database>
#include <db_method>

namespace coco {


class search_graph_context : public vdbl::context
{
  const gptr<search_graph>* __sg;
  bool __free;

public:
  search_graph_context() : __sg(NULL), __free(false) {}
  search_graph_context(const gptr<search_graph>* _i) : __sg(_i), __free(false) {}
  search_graph_context(search_graph& _i)
        : __sg(new const ptr<search_graph>(&_i)), __free(true) {}
  search_graph_context(const search_graph_context& _s)
        : __sg(_s.__sg), __free(_s.__free) {}
  virtual ~search_graph_context() { if(__free) delete __sg; }

  search_graph_context& operator=(const search_graph_context& _s)
        { __sg = _s.__sg; return *this; }

  const gptr<search_graph>* sg() const { return __sg; }
};

} // namespace coco

#endif // _SGRAPHCTX_H

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