moeoElitistReplacement.h

/* 
* <moeoElitistReplacement.h>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
* (C) OPAC Team, LIFL, 2002-2007
*
* Arnaud Liefooghe
*
* This software is governed by the CeCILL license under French law and
* abiding by the rules of distribution of free software.  You can  use,
* modify and/ or redistribute the software under the terms of the CeCILL
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
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* modify and redistribute granted by the license, users are provided only
* with a limited warranty  and the software's author,  the holder of the
* economic rights,  and the successive licensors  have only  limited liability.
*
* In this respect, the user's attention is drawn to the risks associated
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* software by the user in light of its specific status of free software,
* that may mean  that it is complicated to manipulate,  and  that  also
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*/
//-----------------------------------------------------------------------------

#ifndef MOEOELITISTREPLACEMENT_H_
#define MOEOELITISTREPLACEMENT_H_

#include <comparator/moeoComparator.h>
#include <comparator/moeoFitnessThenDiversityComparator.h>
#include <diversity/moeoDiversityAssignment.h>
#include <diversity/moeoDummyDiversityAssignment.h>
#include <fitness/moeoFitnessAssignment.h>
#include <replacement/moeoReplacement.h>

template < class MOEOT > class moeoElitistReplacement:public moeoReplacement < MOEOT >
{
public:

    moeoElitistReplacement (moeoFitnessAssignment < MOEOT > & _fitnessAssignment, moeoDiversityAssignment < MOEOT > & _diversityAssignment, moeoComparator < MOEOT > & _comparator) :
            fitnessAssignment (_fitnessAssignment), diversityAssignment (_diversityAssignment), comparator (_comparator)
    {}


    moeoElitistReplacement (moeoFitnessAssignment < MOEOT > & _fitnessAssignment, moeoDiversityAssignment < MOEOT > & _diversityAssignment) :
            fitnessAssignment (_fitnessAssignment), diversityAssignment (_diversityAssignment), comparator (defaultComparator)
    {}


    moeoElitistReplacement (moeoFitnessAssignment < MOEOT > & _fitnessAssignment, moeoComparator < MOEOT > & _comparator) :
            fitnessAssignment (_fitnessAssignment), diversityAssignment (defaultDiversity), comparator (_comparator)
    {}


    moeoElitistReplacement (moeoFitnessAssignment < MOEOT > & _fitnessAssignment) :
            fitnessAssignment (_fitnessAssignment), diversityAssignment (defaultDiversity), comparator (defaultComparator)
    {}


    void operator () (eoPop < MOEOT > &_parents, eoPop < MOEOT > &_offspring)
    {
        unsigned int sz = _parents.size ();
        // merges offspring and parents into a global population
        _parents.reserve (_parents.size () + _offspring.size ());
        std::copy (_offspring.begin (), _offspring.end (), back_inserter (_parents));
        // evaluates the fitness and the diversity of this global population
        fitnessAssignment (_parents);
        diversityAssignment (_parents);
        // sorts the whole population according to the comparator
        std::sort(_parents.begin(), _parents.end(), comparator);
        // finally, resize this global population
        _parents.resize (sz);
        // and clear the offspring population
        _offspring.clear ();
    }


protected:

    moeoFitnessAssignment < MOEOT > & fitnessAssignment;
    moeoDiversityAssignment < MOEOT > & diversityAssignment;
    moeoDummyDiversityAssignment < MOEOT > defaultDiversity;
    moeoFitnessThenDiversityComparator < MOEOT > defaultComparator;
    class Cmp
    {
    public:
        Cmp(moeoComparator < MOEOT > & _comp) : comp(_comp)
        {}
        bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2)
        {
            return comp(_moeo2,_moeo1);
        }
    private:
        moeoComparator < MOEOT > & comp;
    } comparator;

};

#endif /*MOEOELITISTREPLACEMENT_H_ */

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