moeoObjectiveVectorTraits.h

// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-

//-----------------------------------------------------------------------------
// moeoObjectiveVectorTraits.h
// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
/*
    This library...

    Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
 */
//-----------------------------------------------------------------------------

#ifndef MOEOOBJECTIVEVECTORTRAITS_H_
#define MOEOOBJECTIVEVECTORTRAITS_H_

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

class moeoObjectiveVectorTraits
{
public:

    static void setup(unsigned _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 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 _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 _i) {
        return (! minimizing(_i));
    }

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


private:

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

};

#endif /*MOEOOBJECTIVEVECTORTRAITS_H_*/


// The static variables of the moeoObjectiveVectorTraits class need to be allocated
// (maybe it would have been better to put this on a moeoObjectiveVectorTraits.cpp file)
unsigned moeoObjectiveVectorTraits::nObj;
std::vector < bool > moeoObjectiveVectorTraits::bObj;

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