//  $Id: worldobj_factory.hpp 2986 2007-08-17 16:20:09Z grumbel $
//
//  Pingus - A free Lemmings clone
//  Copyright (C) 2000 Ingo Ruhnke <grumbel@gmx.de>
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the GNU General Public License
//  as published by the Free Software Foundation; either version 2
//  of the License, or (at your option) any later version.
//
//  This program 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#ifndef HEADER_PINGUS_WORLDOBJ_DATA_FACTORY_HXX
#define HEADER_PINGUS_WORLDOBJ_DATA_FACTORY_HXX

#include <map>
#include <string>
#include "file_reader.hpp"


class WorldObj;
class WorldObjAbstractFactory;

/** WorldObjFactory which can be used to create all kinds of
    WorldObj's by given its id */
class WorldObjFactory
{
private:
  std::map<std::string, WorldObjAbstractFactory*> factories;

  static WorldObjFactory* instance_;

  WorldObjFactory ();
  void free_factories();
public:
  /** Return the singleton instance */
  static WorldObjFactory* instance ();
  static void deinit();
  /** Register a factory for object creation */
  void register_factory(const std::string& id,
                        WorldObjAbstractFactory* factory);

  /** Create a WorldObj type from a given piece of xml, use the
      'type' property for determinating the object type. */
  WorldObj* create(const FileReader& reader);

private:
  WorldObjFactory (const WorldObjFactory&);
  WorldObjFactory& operator= (const WorldObjFactory&);
};


#endif

/* EOF */