git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@177 331e1502-861f-0410-8da2-ba01fb791d7f

branches/paradiseo-moeo-1.0/src/metric/moeoBinaryMetricSavingUpdater.h

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+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// moeoBinaryMetricSavingUpdater.h
+// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2006
+/*
+    This library...
+
+    Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef MOEOBINARYMETRICSAVINGUPDATER_H_
+#define MOEOBINARYMETRICSAVINGUPDATER_H_
+
+#include <fstream>
+#include <string>
+#include <eoPop.h>
+#include <utils/eoUpdater.h>
+#include <metric/moeoMetric.h>
+
+/** 
+ * This class allows to save the progression of a binary metric comparing the fitness values of the current population (or archive) 
+ * with the fitness values of the population (or archive) of the generation (n-1) into a file 
+ */
+template <class EOT>
+class moeoBinaryMetricSavingUpdater : public eoUpdater
+{  
+public:
+
+	/**
+	 * The fitness type of a solution 
+	 */
+	typedef typename EOT::ObjectiveVector ObjectiveVector;
+	
+	/**
+	 * Ctor
+	 * @param _metric the binary metric comparing two Pareto sets
+	 * @param _pop the main population
+	 * @param _filename the target filename
+	 */
+	moeoBinaryMetricSavingUpdater (moeoPopVsPopBinaryMetric<EOT,double> & _metric, const eoPop<EOT> & _pop, std::string _filename) : 
+		metric(_metric), pop(_pop), filename(_filename), counter(1)
+	{}
+
+	/**
+	 * Saves the metric's value for the current generation
+	 */  
+	void operator()() {
+		if (pop.size()) {
+			if (firstGen) {
+				firstGen = false;
+			}
+			else {
+				// creation of the two Pareto sets
+				/*				
+				std::vector<ObjectiveVector> from;
+				std::vector<ObjectiveVector> to;
+				for (unsigned i=0; i<pop.size(); i++)
+					from.push_back(pop[i].objectiveVector());
+				for (unsigned i=0 ; i<oldPop.size(); i++)
+					to.push_back(oldPop[i].objectiveVector());
+				*/
+				// writing the result into the file
+				std::ofstream f (filename.c_str(), std::ios::app);
+				f << counter++ << ' ' << metric(pop,oldPop) << std::endl;				
+				f.close();				
+			}
+			oldPop = pop;
+		}
+	}
+
+private:
+
+	/** binary metric comparing two Pareto sets */
+	moeoPopVsPopBinaryMetric<EOT,double> & metric;
+	/** main population */
+	const eoPop<EOT> & pop;
+	/** (n-1) population */
+	eoPop<EOT> oldPop;
+	/** target filename */
+	std::string filename;
+	/** is it the first generation ? */
+	bool firstGen;
+	/** counter */
+	unsigned counter;
+
+};
+
+#endif /*MOEOBINARYMETRICSAVINGUPDATER_H_*/