IFitnessStrategy.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  *
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 *   This program is distributed in the hope that it will be useful,       *
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 ***************************************************************************
 *                                                                         *
 *   This class is a interface for the fitness strategy. It is used from   *
 *   the class individual an is for individual strategy design pattern.    *
 *                                                                         *
 *   $Log: IFitnessStrategy.h,v $
 *   Revision 1.3  2009/07/02 15:24:53  robot12
 *   update and add new class InvertedFitnessStrategy
 *
 *   Revision 1.2  2009/06/15 13:58:37  robot12
 *   3 new fitness strategys and IFitnessStrategy and SumFitnessStragegy with comments.
 *
 *   Revision 1.1  2009/05/04 15:27:56  robot12
 *   rename of some files and moving files to other positions
 *    - SingletonGenAlgAPI has one error!!! --> is not ready now
 *
 *   Revision 1.3  2009/04/30 11:35:53  robot12
 *   some changes:
 *    - insert a SelectStrategie
 *    - insert a MutationStrategie
 *    - reorganisation of the design
 *
 *   Revision 1.2  2009/04/28 13:23:55  robot12
 *   some implements... Part2
 *
 *   Revision 1.1  2009/04/27 10:59:33  robot12
 *   some implements
 *
 *
 ***************************************************************************/

#ifndef IFITNESSSTRATEGY_H_
#define IFITNESSSTRATEGY_H_

// forward declaration
class Individual;

/**
 * The interface for the fitness strategy of an individual.
 */
class IFitnessStrategy {
public:
        /**
         * default constructor
         * do nothing
         */
        IFitnessStrategy();

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

        /**
         * declaration of the function getFitness. This function will give the fitness value
         * of an individual back. For which individual is him called by 'individual'.
         *
         * @param individual (const Individual*) calculate the fitness for this individual
         * @return (double) The fitness value
         */
        virtual double getFitness(const Individual* individual) = 0;
};

#endif /* IFITNESSSTRATEGY_H_ */

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