ExtreamTestFitnessStrategy.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.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
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 *   Free Software Foundation, Inc.,                                       *
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 ***************************************************************************
 *                                                                         *
 *   This is a example implementation for a fitness strategy. It use a     *
 *   other fitness strategy to calculate a value. If the value is lower    *
 *   than 10 it will give value*value back. Else it will be 100.           *
 *   So the most values are by 100 and of one plane. The gen. Alg lose by  *
 *   this strategy his information how to optimize the individual. Because *
 *   all individual are equal good. Only small part of it are better.      *
 *   This is the worst case for a gen. Alg.                                *
 *                                                                         *
 *   $Log: ExtreamTestFitnessStrategy.h,v $
 *   Revision 1.2  2009/07/21 08:37:59  robot12
 *   add some comments
 *
 *   Revision 1.1  2009/06/15 13:58:36  robot12
 *   3 new fitness strategys and IFitnessStrategy and SumFitnessStragegy with comments.
 *
 *
 *
 ***************************************************************************/

#ifndef EXTREAMTESTFITNESSSTRATEGY_H_
#define EXTREAMTESTFITNESSSTRATEGY_H_

//forward declaration
class Individual;

//ga_tools includes
#include "IFitnessStrategy.h"

/**
 * An example implementation and a extreme test for gen. Alg.
 */
class ExtreamTestFitnessStrategy: public IFitnessStrategy {
public:
        /**
         * constructor
         * This strategy needs a other fitness strategy to calculate the resulting fitness.
         * @param fitness (IFitnessStrategy*) the other fitness
         */
        ExtreamTestFitnessStrategy(IFitnessStrategy* fitness);

        /**
         * default destructor
         * do nothing
         */
        virtual ~ExtreamTestFitnessStrategy();

        /**
         * implementation for getFitness of IFitnessStrategy.
         * return a² of the other fitness strategy if the value is lower than 10.
         * Else it return 100.
         * @param individual (const Indivual*) the individual for which the value is calculated
         * @return (double) the result
         */
        virtual double getFitness(const Individual* individual);

private:
        /**
         * a other fitness strategy which is used as base calculation.
         */
        IFitnessStrategy* m_strategy;

        /**
         * disable the default constructor
         */
        ExtreamTestFitnessStrategy();
};

#endif /* EXTREAMTESTFITNESSSTRATEGY_H_ */

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