merge ParadisEO-MOEO v-1.0

git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@400 331e1502-861f-0410-8da2-ba01fb791d7f

trunk/paradiseo-moeo/src/selection/moeoRouletteSelect.h

@@ -0,0 +1,62 @@
+// -*- 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 <selection/moeoSelectOne.h>
+#include <selection/moeoSelectors.h>
+
+/**
+ * Selection strategy that selects ONE individual by using roulette wheel process.
+ * @WARNING This selection only uses fitness values (and not diversity values).
+ */
+template < class MOEOT >
+class moeoRouletteSelect:public moeoSelectOne < MOEOT >
+{
+public:
+
+    /**
+     * Ctor.
+     * @param _tSize the number of individuals in the tournament (default: 2)	 
+     */
+    moeoRouletteSelect (unsigned int _tSize = 2) : tSize (_tSize)
+    {
+        // consistency check
+        if (tSize < 2)
+        {
+            std::
+            cout << "Warning, Tournament size should be >= 2\nAdjusted to 2\n";
+            tSize = 2;
+        }
+    }
+
+
+    /**
+     * Apply the tournament to the given population
+     * @param _pop the population
+     */
+    const MOEOT & operator  () (const eoPop < MOEOT > & _pop)
+    {
+        // use the selector
+        return mo_roulette_wheel(_pop,tSize);
+    }
+
+
+protected:
+
+    /** size */
+    double & tSize;
+
+};
+
+#endif /*MOEOROULETTESELECT_H_ */