Migration from SVN

mo/src/explorer/moFirstImprHCexplorer.h

@@ -0,0 +1,171 @@
+/*
+  <moFirstImprHCexplorer.h>
+  Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010
+
+  Sébastien Verel, Arnaud Liefooghe, Jérémie Humeau
+
+  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 _moFirstImprHCexplorer_h
+#define _moFirstImprHCexplorer_h
+
+#include <explorer/moNeighborhoodExplorer.h>
+#include <comparator/moNeighborComparator.h>
+#include <comparator/moSolNeighborComparator.h>
+#include <neighborhood/moNeighborhood.h>
+
+/**
+ * Explorer for a first improvement heuristic
+ */
+template< class Neighbor>
+class moFirstImprHCexplorer : public moNeighborhoodExplorer<Neighbor>
+{
+public:
+    typedef typename Neighbor::EOT EOT ;
+    typedef moNeighborhood<Neighbor> Neighborhood ;
+
+    using moNeighborhoodExplorer<Neighbor>::neighborhood;
+    using moNeighborhoodExplorer<Neighbor>::eval;
+    using moNeighborhoodExplorer<Neighbor>::currentNeighbor;
+    using moNeighborhoodExplorer<Neighbor>::selectedNeighbor;
+
+    /**
+     * Constructor
+     * @param _neighborhood the neighborhood
+     * @param _eval the evaluation function
+     * @param _neighborComparator a neighbor comparator
+     * @param _solNeighborComparator a solution vs neighbor comparator
+     */
+    moFirstImprHCexplorer(Neighborhood& _neighborhood, moEval<Neighbor>& _eval, moNeighborComparator<Neighbor>& _neighborComparator, moSolNeighborComparator<Neighbor>& _solNeighborComparator) : moNeighborhoodExplorer<Neighbor>(_neighborhood, _eval), neighborComparator(_neighborComparator), solNeighborComparator(_solNeighborComparator) {
+        isAccept = false;
+	stop = true;
+    }
+
+    /**
+     * Destructor
+     */
+    ~moFirstImprHCexplorer() {
+    }
+
+    /**
+     * to never stop the hill climbing
+     * 
+     */
+    virtual void alwaysContinue() {
+      stop = false;
+    }
+
+    /**
+     * initParam: NOTHING TO DO
+     * @param _solution unused solution
+     */
+    virtual void initParam(EOT & _solution) {};
+
+    /**
+     * updateParam: NOTHING TO DO
+     * @param _solution unused solution
+     */
+    virtual void updateParam(EOT & _solution) {};
+
+    /**
+     * terminate: NOTHING TO DO
+     * @param _solution unused solution
+     */
+    virtual void terminate(EOT & _solution) {};
+
+    /**
+     * Explore the neighborhood of a solution until an ameliorated neighbor is found
+     * @param _solution
+     */
+    virtual void operator()(EOT & _solution) {
+
+        //Test if _solution has a Neighbor
+        if (neighborhood.hasNeighbor(_solution)) {
+            //init the first neighbor
+            neighborhood.init(_solution, currentNeighbor);
+
+            //eval the _solution moved with the neighbor and stock the result in the neighbor
+            eval(_solution, currentNeighbor);
+
+            //test all others neighbors
+            while (! solNeighborComparator(_solution, currentNeighbor) && neighborhood.cont(_solution)) {
+                //next neighbor
+                neighborhood.next(_solution, currentNeighbor);
+                //eval
+                eval(_solution, currentNeighbor);
+            }
+	    
+	    // the selected neighbor
+	    selectedNeighbor = currentNeighbor;
+        }
+        else {
+            //if _solution hasn't neighbor,
+            isAccept=false;
+        }
+    };
+
+    /**
+     * continue if a move is accepted, or according to the flag 'stop'
+     * @param _solution the solution
+     * @return true if an ameliorated neighbor was found
+     */
+    virtual bool isContinue(EOT & _solution) {
+      if (stop)
+        return isAccept ;
+      else
+	return true;
+    };
+
+    /**
+     * accept test if an ameliorated neighbor was found
+     * @param _solution the solution
+     * @return true if the best neighbor ameliorate the fitness
+     */
+    virtual bool accept(EOT & _solution) {
+        if (neighborhood.hasNeighbor(_solution)) {
+            isAccept = solNeighborComparator(_solution, selectedNeighbor) ;
+        }
+        return isAccept;
+    };
+
+private:
+    // comparator betwenn solution and neighbor or between neighbors
+    moNeighborComparator<Neighbor>& neighborComparator;
+    moSolNeighborComparator<Neighbor>& solNeighborComparator;
+
+    // true if the move is accepted
+    bool isAccept ;
+
+  // if true the HC stop when to improving solution is found
+  // if false : never stop, always continue (external continuator)
+  bool stop ;
+};
+
+
+#endif