git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@192 331e1502-861f-0410-8da2-ba01fb791d7f

branches/paradiseo-moeo-1.0/src/moeoRouletteSelect.h

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+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// moeoRouletteSelect.h
+// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
+/*
+    This library...
+
+    Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef MOEOROULETTESELECT_H_
+#define MOEOROULETTESELECT_H_
+
+#include <moeoSelectOne.h>
+#include <moeoSelectors.h>
+
+/**
+ *  moeoRouletteSelect: a selection method that selects ONE individual by
+ *	using roulette wheel process
+ */
+template < class MOEOT >
+ class moeoRouletteSelect:public moeoSelectOne <MOEOT>
+{
+public:
+	/**
+	 * Full Ctor
+	 * @param _evalFitness the population fitness assignment
+	 * @param _evalDiversity the population diversity assignment
+	 * @param _comparator the comparator to compare the individuals
+	 * @param _total 
+	 */
+	moeoRouletteSelect (moeoFitnessAssignment < MOEOT > &_evalFitness, moeoDiversityAssignment < MOEOT > &_evalDiversity, moeoComparator < MOEOT > &_comparator, double _total=1 ):evalFitness (_evalFitness), evalDiversity (_evalDiversity),
+    comparator (_comparator), total (_total) {}
+
+	/**
+	 * Ctor without comparator. A moeoFitnessThenDiversityComparator is used as default.
+	 * @param _evalFitness the population fitness assignment
+	 * @param _evalDiversity the population diversity assignment
+	 * @param _total 
+	 */
+	moeoRouletteSelect (moeoFitnessAssignment < MOEOT > &_evalFitness, moeoDiversityAssignment < MOEOT > &_evalDiversity)
+		:evalFitness (_evalFitness), evalDiversity (_evalDiversity)
+	    
+	  {
+	  	 // a moeoFitThenDivComparator is used as default
+	    moeoFitnessThenDiversityComparator < MOEOT > &fitThenDivComparator;
+	    comparator = fitThenDivComparator;
+	  }
+	  
+	/**
+	 * Ctor without diversity assignment. A dummy diversity assignment is used.
+	 * @param _evalFitness the population fitness assignment
+	 * @param _comparator the comparator to compare the individuals
+	 * @param _total
+	 */
+moeoRouletteSelect (moeoFitnessAssignment < MOEOT > &_evalFitness, moeoComparator < MOEOT > &_comparator, double _total=1):evalFitness (_evalFitness), comparator (_comparator),
+    total
+    (_total)
+  {
+    // a dummy diversity is used as default
+    moeoDummyDiversityAssignment < MOEOT > &dummyDiversityAssignment;
+    evalDiversity = dummyDiversityAssignment;
+  }
+
+
+     /**
+	 * Ctor without diversity assignment nor comparator. A moeoDummyDiversityAssignment and a moeoFitnessThenDiversityComparator are used as default.
+	 * @param _evalFitness the population fitness assignment
+	 * @param _total
+	 */
+moeoRouletteSelect (moeoFitnessAssignment < MOEOT > &_evalFitness, double _total=1):evalFitness (_evalFitness),
+    total (_total)
+  {
+    // a dummy diversity is used as default
+    moeoDummyDiversityAssignment < MOEOT > &dummyDiversityAssignment;
+    evalDiversity = dummyDiversityAssignment;
+
+    // a moeoFitThenDivComparator is used as default
+    moeoFitnessThenDiversityComparator < MOEOT > &fitThenDivComparator;
+    comparator = fitThenDivComparator;
+  }
+  
+	/*
+	 * Evaluate the fitness and the diversity of each individual of the population.
+	 */
+	 void setup (eoPop<MOEOT>& _pop)
+      {
+      		// eval fitness
+      		evalFitness(_pop);
+      		
+      		// eval diversity
+      		evalDiversity(_pop);      
+      }
+
+  /**
+   *  Apply the tournament to the given population
+   */
+  const MOEOT & operator  () (const eoPop < MOEOT > &_pop)
+  {
+  	// use the selector
+   	return mo_roulette_wheel(_pop,total); //comparator ??
+  }
+
+
+protected:
+
+	moeoFitnessAssignment < MOEOT > &evalFitness;
+
+	moeoDiversityAssignment < MOEOT > &evalDiversity;
+
+	moeoComparator < MOEOT > &comparator;
+
+	double total;
+
+};
+
+#endif /*MOEOROULETTESELECT_H_ */