moeoObjectiveVectorTraits.h

/* 
* <moeoObjectiveVectorTraits.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
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* "http://www.cecill.info".
*
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* economic rights,  and the successive licensors  have only  limited liability.
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//-----------------------------------------------------------------------------

#ifndef MOEOOBJECTIVEVECTORTRAITS_H_
#define MOEOOBJECTIVEVECTORTRAITS_H_

#include <iostream>
#include <stdexcept>
#include <vector>

class moeoObjectiveVectorTraits
{
public:

    static void setup(unsigned int _nObjectives, std::vector < bool > & _bObjectives)
    {
        // in case the number of objectives was already set to a different value
        if ( nObj && (nObj != _nObjectives) ) {
            std::cout << "WARNING\n";
            std::cout << "WARNING : the number of objectives are changing\n";
            std::cout << "WARNING : Make sure all existing objects are destroyed\n";
            std::cout << "WARNING\n";
        }
        // number of objectives
        nObj = _nObjectives;
        // min/max vector
        bObj = _bObjectives;
        // in case the number of objectives and the min/max vector size don't match
        if (nObj != bObj.size())
            throw std::runtime_error("Number of objectives and min/max size don't match in moeoObjectiveVectorTraits::setup");
    }


    static unsigned int nObjectives()
    {
        // in case the number of objectives would not be assigned yet
        if (! nObj)
            throw std::runtime_error("Number of objectives not assigned in moeoObjectiveVectorTraits");
        return nObj;
    }


    static bool minimizing(unsigned int _i)
    {
        // in case there would be a wrong index
        if (_i >= bObj.size())
            throw std::runtime_error("Wrong index in moeoObjectiveVectorTraits");
        return bObj[_i];
    }


    static bool maximizing(unsigned int _i) {
        return (! minimizing(_i));
    }


    static double tolerance()
    {
        return 1e-6;
    }


private:

    static unsigned int nObj;
    static std::vector < bool > bObj;

};

#endif /*MOEOOBJECTIVEVECTORTRAITS_H_*/

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