Migration from SVN

moeo/src/utils/moeoBinaryMetricSavingUpdater.h

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+/*
+* <moeoBinaryMetricSavingUpdater.h>
+* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
+* (C) OPAC Team, LIFL, 2002-2007
+*
+* Arnaud Liefooghe
+*
+* This software is governed by the CeCILL license under French law and
+* abiding by the rules of distribution of free software.  You can  use,
+* modify and/ or redistribute the software under the terms of the CeCILL
+* license as circulated by CEA, CNRS and INRIA at the following URL
+* "http://www.cecill.info".
+*
+* As a counterpart to the access to the source code and  rights to copy,
+* modify and redistribute granted by the license, users are provided only
+* with a limited warranty  and the software's author,  the holder of the
+* economic rights,  and the successive licensors  have only  limited liability.
+*
+* In this respect, the user's attention is drawn to the risks associated
+* with loading,  using,  modifying and/or developing or reproducing the
+* software by the user in light of its specific status of free software,
+* that may mean  that it is complicated to manipulate,  and  that  also
+* therefore means  that it is reserved for developers  and  experienced
+* professionals having in-depth computer knowledge. Users are therefore
+* encouraged to load and test the software's suitability as regards their
+* requirements in conditions enabling the security of their systems and/or
+* data to be ensured and,  more generally, to use and operate it in the
+* same conditions as regards security.
+* The fact that you are presently reading this means that you have had
+* knowledge of the CeCILL license and that you accept its terms.
+*
+* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
+* Contact: paradiseo-help@lists.gforge.inria.fr
+*
+*/
+//-----------------------------------------------------------------------------
+
+#ifndef MOEOBINARYMETRICSAVINGUPDATER_H_
+#define MOEOBINARYMETRICSAVINGUPDATER_H_
+
+#include <fstream>
+#include <string>
+#include <vector>
+#include <eoPop.h>
+#include <utils/eoUpdater.h>
+#include <metric/moeoMetric.h>
+
+/**
+ * This class allows to save the progression of a binary metric comparing the objective vectors of the current population (or archive)
+ * with the objective vectors of the population (or archive) of the generation (n-1) into a file
+ */
+template < class MOEOT >
+class moeoBinaryMetricSavingUpdater : public eoUpdater
+  {
+  public:
+
+    /** The objective vector type of a solution */
+    typedef typename MOEOT::ObjectiveVector ObjectiveVector;
+
+
+    /**
+     * Ctor
+     * @param _metric the binary metric comparing two Pareto sets
+     * @param _pop the main population
+     * @param _filename the target filename
+     */
+    moeoBinaryMetricSavingUpdater (moeoVectorVsVectorBinaryMetric < ObjectiveVector, double > & _metric, const eoPop < MOEOT > & _pop, std::string _filename) :
+        metric(_metric), pop(_pop), filename(_filename), counter(1), firstGen(true)
+    {}
+
+
+    /**
+     * 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 int i=0; i<pop.size(); i++)
+                from.push_back(pop[i].objectiveVector());
+              for (unsigned int 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(from,to) << std::endl;
+              f.close();
+            }
+          oldPop = pop;
+        }
+    }
+
+
+  private:
+
+    /** binary metric comparing two Pareto sets */
+    moeoVectorVsVectorBinaryMetric < ObjectiveVector, double > & metric;
+    /** main population */
+    const eoPop < MOEOT > & pop;
+    /** (n-1) population */
+    eoPop< MOEOT > oldPop;
+    /** target filename */
+    std::string filename;
+    /** is it the first generation ? */
+    bool firstGen;
+    /** counter */
+    unsigned int counter;
+
+  };
+
+#endif /*MOEOBINARYMETRICSAVINGUPDATER_H_*/