/*
* <moeoNoDesimprovingNeighborhoodExplorer.h>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2008
* (C) OPAC Team, LIFL, 2002-2008
*
* Arnaud Liefooghe
* Jérémie Humeau
*
* 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
* with loading,  using,  modifying and/or developing or reproducing the
* 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
* therefore means  that it is reserved for developers  and  experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and,  more generally, to use and operate it in the
* same conditions as regards security.
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL license and that you accept its terms.
*
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
* Contact: paradiseo-help@lists.gforge.inria.fr
*
*/
//-----------------------------------------------------------------------------

#ifndef _MOEONODESIMPROVINGNEIGHBORHOODEXPLORER_H
#define _MOEONODESIMPROVINGNEIGHBORHOODEXPLORER_H

#include <explorer/moeoSubNeighborhoodExplorer.h>

/**
 * Explorer which explore the neighborhood until a no desimproving neighbor is found.
 */
template < class Neighbor >
class moeoNoDesimprovingNeighborhoodExplorer : public moeoSubNeighborhoodExplorer < Neighbor >
{
	/** Alias for the type */
    typedef typename Neighbor::EOT MOEOT;
    /** Alias for the objeciveVector */
    typedef typename MOEOT::ObjectiveVector ObjectiveVector;

    using moeoSubNeighborhoodExplorer<Neighbor>::neighborhood;
    using moeoSubNeighborhoodExplorer<Neighbor>::neighbor;

public:

	/**
	 * Constructor
	 * @param _neighborhood a neighborhood
	 * @param _eval a neighbor evaluation function
	 */
    moeoNoDesimprovingNeighborhoodExplorer(
    		moNeighborhood<Neighbor>& _neighborhood,
        	moEval < Neighbor > & _eval)
            : moeoSubNeighborhoodExplorer< Neighbor >(_neighborhood, 0), eval(_eval){}

private:

	/**
	 * explorer of one individual
	 * @param _src the individual to explore
	 * @param _dest contains new generated individuals
	 */
	void explore(MOEOT & _src, eoPop < MOEOT > & _dest)
	{
		bool tmp=true;
		if(neighborhood.hasNeighbor(_src)){
			neighborhood.init(_src, neighbor);
			eval(_src,neighbor);
			if(!comparator(neighbor.fitness(), _src.objectiveVector())){
				_dest.push_back(_src);
				neighbor.move(_dest.back());
				_dest.back().objectiveVector(neighbor.fitness());
				_dest.back().flag(0);
				tmp=false;
			}
			while (neighborhood.cont(_src) && tmp){
				neighborhood.next(_src, neighbor);
				eval(_src,neighbor);
				if(!comparator(neighbor.fitness(), _src.objectiveVector())){
					_dest.push_back(_src);
					neighbor.move(_dest.back());
					_dest.back().objectiveVector(neighbor.fitness());
					_dest.back().flag(0);
					tmp=false;
				}
			}
			if(!neighborhood.cont(_src))
				_src.flag(1);
		}
	}

	/** Objective Vector Pareto Comparator */
	moeoParetoObjectiveVectorComparator<ObjectiveVector> comparator;
	/** neighbor evaluation function */
	moEval < Neighbor > & eval;
};

#endif /*_MOEONODESIMPROVINGNEIGHBORHOODEXPLORER_H_*/