eoStarTopology.h

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

//-----------------------------------------------------------------------------
// eoStarTopology.h
// (c) OPAC 2007
/*
    This library...

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

#ifndef EOSTARTOPOLOGY_H_
#define EOSTARTOPOLOGY_H_

//-----------------------------------------------------------------------------
#include <eoTopology.h>
#include <eoSocialNeighborhood.h>
//-----------------------------------------------------------------------------


template < class POT > class eoStarTopology:public eoTopology <POT>
{

public:

    eoStarTopology ():isSetup(false){}


    void setup(const eoPop<POT> & _pop)
    {
        if (!isSetup){

            // put all the particles in the only neighborhood
            for (unsigned i=0;i < _pop.size();i++)
                neighborhood.put(i);

            // set the initial global best as the best initial particle
            neighborhood.best(_pop.best_element());

            isSetup=true;
        }
        else
        {
            // Should activate this part ?
            /*
               std::string s;
               s.append (" Linear topology already setup in eoStarTopology");
               throw std::runtime_error (s);
               */
        }
    }

    /*
     * Update the best fitness of the given particle if it's better.
     * Also replace the global best by the given particle if it's better.
     * @param _po - The particle to update
     * @param _indice - The indice of the given particle in the population
     */
    void updateNeighborhood(POT & _po,unsigned _indice)
    {
        // update the best fitness of the particle
        if (_po.fitness() > _po.best())
        {
            _po.best(_po.fitness());
        }
        // update the global best if the given particle is "better"
        if (_po.fitness() > neighborhood.best().fitness())
        {
            neighborhood.best(_po);
        }
    }


    POT & best (unsigned  _indice) {return (neighborhood.best());}


    void printOn()
    {
        std::cout << "{" ;
        for (unsigned i=0;i< neighborhood.size();i++)
            std::cout << neighborhood.get(i) << " ";
        std::cout << "}" << std::endl;
    }


protected:
    eoSocialNeighborhood<POT> neighborhood; // the only neighborhood
    bool isSetup;
};

#endif /*EOSTARTOPOLOGY_H_ */

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