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mo/src/perturb/moNeighborhoodPerturb.h

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+/*
+<moNeighborhoodPerturb.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  ue,
+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".
+
+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 _moNeighborhoodPerturb_h
+#define _moNeighborhoodPerturb_h
+
+#include <eval/moEval.h>
+#include <perturb/moPerturbation.h>
+#include <neighborhood/moNeighborhood.h>
+
+/**
+ * Neighborhood Perturbation: explore the neighborhood to perturb the solution (the neighborhood could be different as the one used in the Local Search)
+ */
+template< class Neighbor, class OtherNeighbor >
+class moNeighborhoodPerturb : public moPerturbation<Neighbor> {
+
+public:
+    typedef typename Neighbor::EOT EOT;
+    typedef moNeighborhood<OtherNeighbor> OtherNH;
+
+    /**
+     * Constructor
+     * @param _otherNeighborhood a neighborhood
+     * @param _eval an Evaluation Function
+     */
+    moNeighborhoodPerturb(OtherNH& _otherNeighborhood, moEval<OtherNeighbor>& _eval): otherNeighborhood(_otherNeighborhood), eval(_eval) {}
+
+    /**
+     * Apply move on the solution
+     * @param _solution the current solution
+     * @return true
+     */
+    virtual bool operator()(EOT& _solution) {
+        if (otherNeighborhood.hasNeighbor(_solution)) {
+            eval(_solution, current);
+            current.move(_solution);
+            _solution.fitness(current.fitness());
+        }
+        return true;
+    }
+
+    /**
+     * Init the neighborhood
+     * @param _sol the current solution
+     */
+    virtual void init(EOT & _sol) {
+        if (otherNeighborhood.hasNeighbor(_sol))
+            otherNeighborhood.init(_sol, current);
+    }
+
+    /**
+     * ReInit the neighborhood because a move was done
+     * @param _sol the current solution
+     * @param _neighbor unused neighbor (always empty)
+     */
+    virtual void add(EOT & _sol, Neighbor & _neighbor) {
+        (*this).init(_sol);
+    }
+
+    /**
+     * Explore another neighbor because no move was done
+     * @param _sol the current solution
+     * @param _neighbor unused neighbor (always empty)
+     */
+    virtual void update(EOT & _sol, Neighbor & _neighbor) {
+        if (otherNeighborhood.cont(_sol))
+            otherNeighborhood.next(_sol, current);
+        else
+            (*this).init(_sol);
+    }
+
+    /**
+     * NOTHING TO DO
+     */
+    virtual void clearMemory() {}
+
+private:
+    OtherNH& otherNeighborhood;
+    moEval<OtherNeighbor>& eval;
+    OtherNeighbor current;
+};
+
+#endif