moBestImprSelect.h

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

// "moBestImprSelect.h"

// (c) OPAC Team, LIFL, 2003-2006

/* LICENCE TEXT
   
   Contact: paradiseo-help@lists.gforge.inria.fr
*/

#ifndef __moBestImprSelect_h
#define __moBestImprSelect_h

#include "moMoveSelect.h"


template < class M > class moBestImprSelect:public moMoveSelect < M >
{

public:

  typedef typename M::EOType::Fitness Fitness;

  void init (const Fitness & __fit)
  {

    first_time = true;
  }



  bool update (const M & __move, const Fitness & __fit)
  {

    if (first_time || __fit > best_fit)
      {

        best_fit = __fit;
        best_move = __move;

        first_time = false;
      }

    return true;
  }


  void operator   () (M & __move, Fitness & __fit) throw (EmptySelection)
  {

    if (!first_time)
      {
        __move = best_move;
        __fit = best_fit;
      }
    else
      throw EmptySelection ();
  }

private:

  bool first_time;

  M best_move;

  Fitness best_fit;

};

#endif

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