add utils

git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@382 331e1502-861f-0410-8da2-ba01fb791d7f

branches/paradiseo-moeo-1.0/src/utils/moeoArchiveObjectiveVectorSavingUpdater.h

@@ -0,0 +1,94 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// moeoArchiveObjectiveVectorSavingUpdater.h
+// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
+/*
+    This library...
+
+    Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef MOEOARCHIVEOBJECTIVEVECTORSAVINGUPDATER_H_
+#define MOEOARCHIVEOBJECTIVEVECTORSAVINGUPDATER_H_
+
+#include <fstream>
+#include <string>
+#include <eoPop.h>
+#include <utils/eoUpdater.h>
+#include <archive/moeoArchive.h>
+
+#define MAX_BUFFER_SIZE 1000
+
+/**
+ * This class allows to save the objective vectors of the solutions contained in an archive into a file at each generation.
+ */
+template < class MOEOT >
+class moeoArchiveObjectiveVectorSavingUpdater : public eoUpdater
+{
+public:
+
+    /**
+     * Ctor
+     * @param _arch local archive
+     * @param _filename target filename
+     * @param _count put this variable to true if you want a new file to be created each time () is called and to false if you only want the file to be updated
+     * @param _id own ID
+     */
+    moeoArchiveObjectiveVectorSavingUpdater (moeoArchive<MOEOT> & _arch, const std::string & _filename, bool _count = false, int _id = -1) :
+            arch(_arch), filename(_filename), count(_count), counter(0), id(_id)
+    {}
+
+
+    /**
+     * Saves the fitness of the archive's members into the file
+     */
+    void operator()() {
+        char buff[MAX_BUFFER_SIZE];
+        if (count)
+        {
+            if (id == -1)
+            {
+                sprintf (buff, "%s.%u", filename.c_str(), counter ++);
+            }
+            else
+            {
+                sprintf (buff, "%s.%u.%u", filename.c_str(), id, counter ++);
+            }
+        }
+        else
+        {
+            if (id == -1)
+            {
+                sprintf (buff, "%s", filename.c_str());
+            }
+            else
+            {
+                sprintf (buff, "%s.%u", filename.c_str(), id);
+            }
+            counter ++;
+        }
+        std::ofstream f(buff);
+        for (unsigned int i = 0; i < arch.size (); i++)
+            f << arch[i].objectiveVector() << std::endl;
+        f.close ();
+    }
+
+
+private:
+
+    /** local archive */
+    moeoArchive<MOEOT> & arch;
+    /** target filename */
+    std::string filename;
+    /** this variable is set to true if a new file have to be created each time () is called and to false if the file only HAVE to be updated */
+    bool count;
+    /** counter */
+    unsigned int counter;
+    /** own ID */
+    int id;
+
+};
+
+#endif /*MOEOARCHIVEOBJECTIVEVECTORSAVINGUPDATER_H_*/