235 lines
7.6 KiB
C++
235 lines
7.6 KiB
C++
/*
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* <moeoArchive.h>
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* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
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* (C) OPAC Team, LIFL, 2002-2007
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*
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* Arnaud Liefooghe
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*
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* This software is governed by the CeCILL license under French law and
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* abiding by the rules of distribution of free software. You can use,
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* modify and/ or redistribute the software under the terms of the CeCILL
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* license as circulated by CEA, CNRS and INRIA at the following URL
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* "http://www.cecill.info".
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*
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* As a counterpart to the access to the source code and rights to copy,
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* modify and redistribute granted by the license, users are provided only
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* with a limited warranty and the software's author, the holder of the
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* economic rights, and the successive licensors have only limited liability.
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*
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* In this respect, the user's attention is drawn to the risks associated
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* with loading, using, modifying and/or developing or reproducing the
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* software by the user in light of its specific status of free software,
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* that may mean that it is complicated to manipulate, and that also
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* therefore means that it is reserved for developers and experienced
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* professionals having in-depth computer knowledge. Users are therefore
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* encouraged to load and test the software's suitability as regards their
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* requirements in conditions enabling the security of their systems and/or
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* data to be ensured and, more generally, to use and operate it in the
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* same conditions as regards security.
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* The fact that you are presently reading this means that you have had
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* knowledge of the CeCILL license and that you accept its terms.
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*
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* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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* Contact: paradiseo-help@lists.gforge.inria.fr
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*
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*/
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//-----------------------------------------------------------------------------
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#ifndef MOEOARCHIVE_H_
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#define MOEOARCHIVE_H_
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#include <eoPop.h>
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#include <comparator/moeoObjectiveVectorComparator.h>
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#include <comparator/moeoParetoObjectiveVectorComparator.h>
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/**
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* Abstract class for representing an archive ;
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* an archive is a secondary population that stores non-dominated solutions.
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*/
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template < class MOEOT >
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class moeoArchive : public eoPop < MOEOT >, public eoUF < const MOEOT &, bool>, public eoUF < const eoPop < MOEOT > &, bool>
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{
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public:
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using eoPop < MOEOT > :: size;
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using eoPop < MOEOT > :: operator[];
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using eoPop < MOEOT > :: back;
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using eoPop < MOEOT > :: pop_back;
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/**
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* The type of an objective vector for a solution
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*/
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typedef typename MOEOT::ObjectiveVector ObjectiveVector;
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/**
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* Default ctor.
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* The moeoObjectiveVectorComparator used to compare solutions is based on Pareto dominance
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* @param _replace boolean which determine if a solution with the same objectiveVector than another one, can replace it or not
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*/
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moeoArchive(bool _replace=true) : eoPop < MOEOT >(), comparator(paretoComparator), replace(_replace)
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{}
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/**
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* Ctor
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* @param _comparator the moeoObjectiveVectorComparator used to compare solutions
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* @param _replace boolean which determine if a solution with the same objectiveVector than another one, can replace it or not
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*/
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moeoArchive(moeoObjectiveVectorComparator < ObjectiveVector > & _comparator, bool _replace=true) : eoPop < MOEOT >(), comparator(_comparator), replace(_replace)
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{}
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/**
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* Returns true if the current archive dominates _objectiveVector according to the moeoObjectiveVectorComparator given in the constructor
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* @param _objectiveVector the objective vector to compare with the current archive
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*/
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bool dominates (const ObjectiveVector & _objectiveVector) const
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{
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for (unsigned int i = 0; i<size(); i++)
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{
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// if _objectiveVector is dominated by the ith individual of the archive...
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if ( comparator(_objectiveVector, operator[](i).objectiveVector()) )
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{
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return true;
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}
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}
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return false;
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}
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/**
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* Returns true if the current archive already contains a solution with the same objective values than _objectiveVector
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* @param _objectiveVector the objective vector to compare with the current archive
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*/
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bool contains (const ObjectiveVector & _objectiveVector) const
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{
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for (unsigned int i = 0; i<size(); i++)
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{
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if (operator[](i).objectiveVector() == _objectiveVector)
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{
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return true;
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}
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}
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return false;
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}
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/**
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* Updates the archive with a given individual _moeo
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* @param _moeo the given individual
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* @return if the _moeo is added to the archive
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*/
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virtual bool operator()(const MOEOT & _moeo) = 0;
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/**
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* Updates the archive with a given population _pop
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* @param _pop the given population
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* @return if at least one _pop[i] is added to the archive
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*/
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virtual bool operator()(const eoPop < MOEOT > & _pop) = 0;
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/**
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* Returns true if the current archive contains the same objective vectors than the given archive _arch
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* @param _arch the given archive
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*/
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bool equals (const moeoArchive < MOEOT > & _arch)
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{
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for (unsigned int i=0; i<size(); i++)
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{
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if (! _arch.contains(operator[](i).objectiveVector()))
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{
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return false;
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}
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}
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for (unsigned int i=0; i<_arch.size() ; i++)
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{
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if (! contains(_arch[i].objectiveVector()))
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{
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return false;
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}
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}
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return true;
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}
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protected:
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/**
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* Updates the archive with a given individual _moeo
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* @param _moeo the given individual
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*/
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bool update(const MOEOT & _moeo)
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{
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// first step: removing the dominated solutions from the archive
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for (unsigned int j=0; j<size();)
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{
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// if the jth solution contained in the archive is dominated by _moeo
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if ( comparator(operator[](j).objectiveVector(), _moeo.objectiveVector()) )
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{
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operator[](j) = back();
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pop_back();
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}
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else if (replace && (_moeo.objectiveVector() == operator[](j).objectiveVector()))
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{
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operator[](j) = back();
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pop_back();
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}
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else
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{
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j++;
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}
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}
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// second step: is _moeo dominated?
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bool dom = false;
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for (unsigned int j=0; j<size(); j++)
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{
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// if _moeo is dominated by the jth solution contained in the archive
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if ( comparator(_moeo.objectiveVector(), operator[](j).objectiveVector()) )
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{
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dom = true;
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break;
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}
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else if (!replace && (_moeo.objectiveVector() == operator[](j).objectiveVector()) )
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{
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dom = true;
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break;
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}
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}
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if (!dom)
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{
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this->push_back(_moeo);
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}
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return !dom;
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}
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/**
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* Updates the archive with a given population _pop
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* @param _pop the given population
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*/
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bool update(const eoPop < MOEOT > & _pop)
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{
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bool res = false;
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bool tmp = false;
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for (unsigned int i=0; i<_pop.size(); i++)
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{
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tmp = (*this).update(_pop[i]);
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res = tmp || res;
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}
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return res;
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}
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/** The moeoObjectiveVectorComparator used to compare solutions */
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moeoObjectiveVectorComparator < ObjectiveVector > & comparator;
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/** A moeoObjectiveVectorComparator based on Pareto dominance (used as default) */
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moeoParetoObjectiveVectorComparator < ObjectiveVector > paretoComparator;
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/** boolean */
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bool replace;
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};
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#endif /*MOEOARCHIVE_H_ */
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