StandartGenerationSizeStrategy.h

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/***************************************************************************
 *   Copyright (C) 2005-2009 by Robot Group Leipzig                        *
 *    martius@informatik.uni-leipzig.de                                    *
 *    fhesse@informatik.uni-leipzig.de                                     *
 *    der@informatik.uni-leipzig.de                                        *
 *    guettler@informatik.uni-leipzig.de                                   *
 *    jhoffmann@informatik.uni-leipzig.de                                  *
 *    joergweide84@aol.com (robot12)                                       *
 *                                                                         *
 *   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.                                   *
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 *   This program is distributed in the hope that it will be useful,       *
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 *   Free Software Foundation, Inc.,                                       *
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 ***************************************************************************
 *                                                                         *
 *   This class is a implementation for the generation size strategy of the*
 *   genAlgEngine. It calculate the new generation size over the speed of  *
 *   enhancement between the generation. If it to slow so the generation   *
 *   size will be lower and is it to fast so the generation size will be   *
 *   greater.                                                              *
 *                                                                         *
 *   $Log: StandartGenerationSizeStrategy.h,v $
 *   Revision 1.3  2009/07/21 08:37:58  robot12
 *   add some comments
 *
 *   Revision 1.2  2009/06/16 12:25:31  robot12
 *   finishing the generation size strategy and implements the comments.
 *
 *   Revision 1.1  2009/05/04 15:27:57  robot12
 *   rename of some files and moving files to other positions
 *    - SingletonGenAlgAPI has one error!!! --> is not ready now
 *
 *   Revision 1.4  2009/05/04 09:06:00  robot12
 *   some implements... Part7
 *
 *   Revision 1.3  2009/05/04 07:06:14  robot12
 *   some implements... Part6
 *
 *   Revision 1.2  2009/04/30 14:32:34  robot12
 *   some implements... Part5
 *
 *   Revision 1.1  2009/04/30 11:51:25  robot12
 *   some implements... new classes
 *
 *
 *
 ***************************************************************************/

#ifndef STANDARTGENERATIONSIZESTRATEGY_H_
#define STANDARTGENERATIONSIZESTRATEGY_H_

//forward declaration
class Generation;

//ga_tools includes
#include "IGenerationSizeStrategy.h"

/**
 * this class calculate the new generation size over the enhancement speed
 */
class StandartGenerationSizeStrategy : public IGenerationSizeStrategy{
public:
        /**
         * constructor
         * @param startSize (int) is the size of the first generation. is needed as basic of the calculation
         * @param numGeneration (int) is the number of generation which the alg. will be create
         */
        StandartGenerationSizeStrategy(int startSize, int numGeneration);

        /**
         * default destructor
         */
        virtual ~StandartGenerationSizeStrategy();

        /**
         * this function calculate the new generation size
         * @param oldGeneration (Generation*) the old generation
         * @return (int) the new generation size
         */
        virtual int calcGenerationSize(Generation* oldGeneration);

protected:
        /**
         * is the first generation over?
         */
        bool m_firstIsSet;

        /**
         * the start size of the first generation
         */
        int m_startSize;

        /**
         * the number of generation
         */
        int m_numGeneration;

        /**
         * the best value of the first generation
         */
        double m_best_first;

        /**
         * the best value of the last generation.
         */
        double m_best_old;

        /**
         * the best value of the new generation.
         */
        double m_best_new;

private:
        /**
         * disable the default constructor
         */
        StandartGenerationSizeStrategy();
};

#endif /* STANDARTGENERATIONSIZESTRATEGY_H_ */

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