moeoBinaryMetricSavingUpdater.h

/* 
* <moeoBinaryMetricSavingUpdater.h>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
* (C) OPAC Team, LIFL, 2002-2007
*
* Sebastien Cahon, 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".
*
* As a counterpart to the access to the source code and  rights to copy,
* 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 MOEOBINARYMETRICSAVINGUPDATER_H_
#define MOEOBINARYMETRICSAVINGUPDATER_H_

#include <fstream>
#include <string>
#include <vector>
#include <eoPop.h>
#include <utils/eoUpdater.h>
#include <metric/moeoMetric.h>

template < class MOEOT >
class moeoBinaryMetricSavingUpdater : public eoUpdater
{
public:

    typedef typename MOEOT::ObjectiveVector ObjectiveVector;


    moeoBinaryMetricSavingUpdater (moeoVectorVsVectorBinaryMetric < ObjectiveVector, double > & _metric, const eoPop < MOEOT > & _pop, std::string _filename) :
            metric(_metric), pop(_pop), filename(_filename), counter(1)
    {}


    void operator()() {
        if (pop.size()) {
            if (firstGen) {
                firstGen = false;
            }
            else {
                // creation of the two Pareto sets
                std::vector < ObjectiveVector > from;
                std::vector < ObjectiveVector > to;
                for (unsigned int i=0; i<pop.size(); i++)
                    from.push_back(pop[i].objectiveVector());
                for (unsigned int i=0 ; i<oldPop.size(); i++)
                    to.push_back(oldPop[i].objectiveVector());
                // writing the result into the file
                std::ofstream f (filename.c_str(), std::ios::app);
                f << counter++ << ' ' << metric(from,to) << std::endl;
                f.close();
            }
            oldPop = pop;
        }
    }


private:

    moeoVectorVsVectorBinaryMetric < ObjectiveVector, double > & metric;
    const eoPop < MOEOT > & pop;
    eoPop< MOEOT > oldPop;
    std::string filename;
    bool firstGen;
    unsigned int counter;

};

#endif /*MOEOBINARYMETRICSAVINGUPDATER_H_*/

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