moSteadyFitSolContinue.h

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

// "moSteadyFitSolContinue.h"

// (c) OPAC Team (LIFL), Dolphin project (INRIA), 2003-2007

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

#ifndef __moSteadyFitSolContinue_h
#define __moSteadyFitSolContinue_h

#include "moSolContinue.h"


template < class EOT > class moSteadyFitSolContinue:public moSolContinue < EOT >
{

public:

  typedef typename EOT::Fitness Fitness;


  moSteadyFitSolContinue (unsigned int __maxNumberOfIterations, unsigned int __maxNumberOfIterationWithoutImprovement, bool __maximization=true)
    : maxNumberOfIterations (__maxNumberOfIterations), maxNumberOfIterationsWithoutImprovement(__maxNumberOfIterationWithoutImprovement),
      maximization(__maximization), maxNumberOfIterationsReached(false), firstFitnessSaved(true), counter(0) 
  {}


  bool operator   () (const EOT & __sol)
  {
    if(!maxNumberOfIterationsReached)
      {
        maxNumberOfIterationsReached=((++counter)==maxNumberOfIterations);
        if(maxNumberOfIterationsReached)
          {
            std::cout << "moSteadyFitSolContinue: Done the minimum number of iterations [" << counter << "]." << std::endl;
          }
        return true;
      }

    if(__sol.invalid())
      {
        return true;
      }

    if(firstFitnessSaved)
      {
        fitness=__sol.fitness();
        counter=0;
        firstFitnessSaved=false;
        return true;
      }
    
    counter++;

    if( ((maximization) && (__sol.fitness() > fitness)) || 
        ((!maximization) && (__sol.fitness() < fitness)) )
      {
        fitness=__sol.fitness();
        counter=0;
      }
  
    if(counter==maxNumberOfIterationsWithoutImprovement)
      {
        std::cout << "moSteadyFitSolContinue: Done [" << counter  << "] iterations without improvement." << std::endl;
      }
    return counter!=maxNumberOfIterationsWithoutImprovement;
  }

  void init ()
  {}

private:

  unsigned int maxNumberOfIterations;

  unsigned int maxNumberOfIterationsWithoutImprovement;

  bool maxNumberOfIterationsReached;

  bool firstFitnessSaved;

  Fitness fitness;


  bool maximization;

  unsigned int counter;
};

#endif

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