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HalftonerFactory.h

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/*
 * @(#)include/HalftonerFactory.h  1.0  2002-07-21 22:13
 *
 * Copyright (C)  2002  Daniel Léonard
 *
 * 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 _HALFTONER_FACTORY_H_
#define _HALFTONER_FACTORY_H_

#include <map>
#include <stdexcept>

namespace halftoner
{
   class Halftoner;
   class Instanciator;

   class HalftonerFactory
   {
      private:
         class Repository
         {
            private:

               std::map<const char*, const Instanciator*> depot;
//\}

            public:
               Repository() throw();
               ~Repository() throw();


               void add(const char* name, const Instanciator* instanciator) throw (std::invalid_argument);

               const Instanciator* get(const char* key) throw ();

            private:

               std::map<const char*, const Instanciator*>& getMap() throw();
         };

      private:
         static HalftonerFactory::Repository repository;

      public:
         static const char* FLOYD_STEINBERG;
         static const char* JARVIS_JUDICE_NINKE;
         static const char* STUCKI;
         static const char* VG91;
         static const char* VG95;
         static const char* VGEXP;
//\}

      private:

         HalftonerFactory() throw();

         HalftonerFactory(const HalftonerFactory&) throw();

         HalftonerFactory operator=(const HalftonerFactory&) throw();

      public:
         ~HalftonerFactory() throw();


         static void addHalftoner(const char* key, const Instanciator* instanciator) throw (std::invalid_argument);
         static Halftoner* getInstance(const char* key) throw (std::invalid_argument);

      private:
         static HalftonerFactory::Repository& getRepository() throw();
   };

}

#endif   /* #ifndef _HALFTONER_FACTORY_H_ */

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