/*
* <moeoObjectiveObjectiveVectorComparator.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
* 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
* therefore means  that it is reserved for developers  and  experienced
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*/
//-----------------------------------------------------------------------------

#ifndef MOEOOBJECTIVEOBJECTIVEVECTORCOMPARATOR_H_
#define MOEOOBJECTIVEOBJECTIVEVECTORCOMPARATOR_H_

#include <comparator/moeoObjectiveVectorComparator.h>

/**
 * Functor allowing to compare two objective vectors according to their first objective value, then their second, and so on.
 */
template < class ObjectiveVector >
class moeoObjectiveObjectiveVectorComparator : public moeoObjectiveVectorComparator < ObjectiveVector >
  {
  public:

    /**
     * Returns true if _objectiveVector1 < _objectiveVector2 on the first objective, then on the second, and so on
     * @param _objectiveVector1 the first objective vector
     * @param _objectiveVector2 the second objective vector
     */
    bool operator()(const ObjectiveVector & _objectiveVector1, const ObjectiveVector & _objectiveVector2)
    {
      for (unsigned int i=0; i<ObjectiveVector::nObjectives(); i++)
        {
          if ( fabs(_objectiveVector1[i] - _objectiveVector2[i]) > ObjectiveVector::Traits::tolerance() )
            {
              if (_objectiveVector1[i] < _objectiveVector2[i])
                {
                  return true;
                }
              else
                {
                  return false;
                }
            }
        }
      return false;
    }

  };

#endif /*MOEOOBJECTIVEOBJECTIVEVECTORCOMPARATOR_H_*/