new version

git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@267 331e1502-861f-0410-8da2-ba01fb791d7f
2007-04-17 15:53:56 +00:00 · 2007-04-17 15:53:56 +00:00 · 5df71ee73a
commit 5df71ee73a
parent 6a6dab8eff
42 changed files with 3554 additions and 824 deletions
--- a/trunk/paradiseo-moeo/src/moeoEnvironmentalReplacement.h
+++ b/trunk/paradiseo-moeo/src/moeoEnvironmentalReplacement.h
@ -0,0 +1,149 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// moeoEnvironmentalReplacement.h
+// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
+/*
+    This library...
+
+    Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef MOEOENVIRONMENTALREPLACEMENT_H_
+#define MOEOENVIRONMENTALREPLACEMENT_H_
+
+#include <moeoReplacement.h>
+#include <moeoComparator.h>
+#include <moeoFitnessAssignment.h>
+#include <moeoDiversityAssignment.h>
+
+/**
+ * Environmental replacement strategy that consists in keeping the N best individuals by deleting individuals 1 by 1
+ * and by updating the fitness and diversity values after each deletion.
+ */
+template < class MOEOT > class moeoEnvironmentalReplacement:public moeoReplacement < MOEOT >
+{
+public:
+
+    /** The type for objective vector */
+    typedef typename MOEOT::ObjectiveVector ObjectiveVector;
+
+
+    /**
+     * Full constructor.
+     * @param _evalFitness the fitness assignment strategy
+     * @param _evalDiversity the diversity assignment strategy
+     * @param _comparator the comparator (used to compare 2 individuals)
+     */
+    moeoEnvironmentalReplacement (moeoFitnessAssignment < MOEOT > & _evalFitness, moeoDiversityAssignment < MOEOT > & _evalDiversity, moeoComparator < MOEOT > & _comparator) :
+            evalFitness (_evalFitness), evalDiversity (_evalDiversity), comparator (_comparator)
+    {}
+
+
+    /**
+     * Constructor without comparator. A moeoFitThenDivComparator is used as default.
+     * @param _evalFitness the fitness assignment strategy
+     * @param _evalDiversity the diversity assignment strategy
+     */
+    moeoEnvironmentalReplacement (moeoFitnessAssignment < MOEOT > & _evalFitness, moeoDiversityAssignment < MOEOT > & _evalDiversity) :
+            evalFitness (_evalFitness), evalDiversity (_evalDiversity), comparator (*(new moeoFitnessThenDiversityComparator < MOEOT >))
+    {}
+
+
+    /**
+     * Constructor without moeoDiversityAssignement. A dummy diversity is used as default.
+     * @param _evalFitness the fitness assignment strategy
+     * @param _comparator the comparator (used to compare 2 individuals)
+     */
+    moeoEnvironmentalReplacement (moeoFitnessAssignment < MOEOT > & _evalFitness, moeoComparator < MOEOT > & _comparator) :
+            evalFitness (_evalFitness), evalDiversity (*(new moeoDummyDiversityAssignment < MOEOT >)), comparator (_comparator)
+    {}
+
+
+    /**
+     * Constructor without moeoDiversityAssignement nor moeoComparator.
+     * A moeoFitThenDivComparator and a dummy diversity are used as default.
+     * @param _evalFitness the fitness assignment strategy
+     */
+    moeoEnvironmentalReplacement (moeoFitnessAssignment < MOEOT > & _evalFitness) :
+            evalFitness (_evalFitness), evalDiversity (*(new moeoDummyDiversityAssignment < MOEOT >)), comparator (*(new moeoFitnessThenDiversityComparator < MOEOT >))
+    {}
+
+
+    /**
+     * Replaces the first population by adding the individuals of the second one, sorting with a moeoComparator and resizing the whole population obtained.
+        * @param _parents the population composed of the parents (the population you want to replace)
+        * @param _offspring the offspring population
+     */
+    void operator () (eoPop < MOEOT > &_parents, eoPop < MOEOT > &_offspring)
+    {
+        unsigned sz = _parents.size();
+        // merges offspring and parents into a global population
+        _parents.reserve (_parents.size() + _offspring.size());
+        copy (_offspring.begin(), _offspring.end(), back_inserter(_parents));
+        // evaluates the fitness and the diversity of this global population
+        evalFitness (_parents);
+        evalDiversity (_parents);
+        // remove individuals 1 by 1 and update the fitness values
+        Cmp cmp(comparator);
+        ObjectiveVector worstObjVec;
+        while (_parents.size() > sz)
+        {
+            std::sort (_parents.begin(), _parents.end(), cmp);
+            worstObjVec = _parents[_parents.size()-1].objectiveVector();
+            _parents.resize(_parents.size()-1);
+            evalFitness.updateByDeleting(_parents, worstObjVec);
+            evalDiversity.updateByDeleting(_parents, worstObjVec);
+        }
+        // clear the offspring population
+        _offspring.clear ();
+    }
+
+
+protected:
+
+    /** the fitness assignment strategy */
+    moeoFitnessAssignment < MOEOT > & evalFitness;
+    /** the diversity assignment strategy */
+    moeoDiversityAssignment < MOEOT > & evalDiversity;
+    /** the comparator (used to compare 2 individuals) */
+    moeoComparator < MOEOT > & comparator;
+
+
+    /**
+     * This class is used to compare solutions in order to sort the population.
+     */
+    class Cmp
+    {
+    public:
+
+        /**
+         * Ctor.
+         * @param _comparator the comparator
+         */
+        Cmp(moeoComparator < MOEOT > & _comparator) : comparator(_comparator)
+        {}
+
+
+        /**
+         * Returns true if _moeo1 is greater than _moeo2 according to the comparator
+         * _moeo1 the first individual
+         * _moeo2 the first individual
+         */
+        bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2)
+        {
+            return comparator(_moeo1,_moeo2);
+        }
+
+
+    private:
+
+        /** the comparator */
+        moeoComparator < MOEOT > & comparator;
+
+    };
+
+};
+
+#endif /*MOEOENVIRONMENTALREPLACEMENT_H_ */