57a6d3dfba
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@238 331e1502-861f-0410-8da2-ba01fb791d7f
133 lines
3.7 KiB
C++
133 lines
3.7 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// moeoComparator.h
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// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
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/*
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This library...
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Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
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*/
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//-----------------------------------------------------------------------------
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#ifndef MOEOCOMPARATOR_H_
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#define MOEOCOMPARATOR_H_
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#include <eoFunctor.h>
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/**
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* Functor allowing to compare two solutions.
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*/
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template < class MOEOT >
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class moeoComparator : public eoBF < const MOEOT &, const MOEOT &, const bool >
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{};
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/**
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* Functor allowing to compare two solutions according to their first objective value, then their second, and so on.
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*/
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template < class MOEOT >
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class moeoObjectiveComparator : public moeoComparator < MOEOT >
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{
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public:
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/**
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* Returns true if _moeo1 is greater than _moeo2 on the first objective, then on the second, and so on
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* @param _moeo1 the first solution
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* @param _moeo2 the second solution
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*/
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const bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2)
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{
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return _moeo1.objectiveVector() > _moeo2.objectiveVector();
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}
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};
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/**
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* Functor allowing to compare two solutions according to one objective.
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*/
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template < class MOEOT >
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class moeoOneObjectiveComparator : public moeoComparator < MOEOT >
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{
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public:
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/**
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* Ctor.
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* @param _obj the index of objective
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*/
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moeoOneObjectiveComparator(unsigned _obj) : obj(_obj)
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{
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if (obj > MOEOT::ObjectiveVector::nObjectives())
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{
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throw std::runtime_error("Problem with the index of objective in moeoOneObjectiveComparator");
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}
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}
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/**
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* Returns true if _moeo1 is greater than _moeo2 on the obj objective
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* @param _moeo1 the first solution
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* @param _moeo2 the second solution
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*/
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const bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2)
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{
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return _moeo1.objectiveVector()[obj] > _moeo2.objectiveVector()[obj];
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}
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private:
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/** the index of objective */
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unsigned obj;
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};
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/**
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* Functor allowing to compare two solutions according to their fitness values, then according to their diversity values.
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*/
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template < class MOEOT >
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class moeoFitnessThenDiversityComparator : public moeoComparator < MOEOT >
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{
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public:
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/**
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* Returns true if _moeo1 is greater than _moeo2 according to their fitness values, then according to their diversity values
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* @param _moeo1 the first solution
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* @param _moeo2 the second solution
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*/
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const bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2)
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{
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if (_moeo1.fitness() == _moeo2.fitness())
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{
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return _moeo1.diversity() > _moeo2.diversity();
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}
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else
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{
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return _moeo1.fitness() > _moeo2.fitness();
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}
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}
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};
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/**
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* Functor allowing to compare two solutions according to their diversity values, then according to their fitness values.
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*/
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template < class MOEOT >
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class moeoDiversityThenFitnessComparator : public moeoComparator < MOEOT >
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{
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public:
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/**
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* Returns true if _moeo1 is greater than _moeo2 according to their diversity values, then according to their fitness values
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* @param _moeo1 the first solution
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* @param _moeo2 the second solution
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*/
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const bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2)
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{
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if (_moeo1.diversity() == _moeo2.diversity())
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{
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return _moeo1.fitness() > _moeo2.fitness();
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}
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else
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{
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return _moeo1.diversity() > _moeo2.diversity();
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}
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}
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};
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#endif /*MOEOCOMPARATOR_H_*/
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