git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@34 331e1502-861f-0410-8da2-ba01fb791d7f

trunk/paradiseo-mo/src/moItRandNextMove.h

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+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+// "moNextMove.h"
+
+// (c) OPAC Team, LIFL, 2003-2006
+
+/* LICENCE TEXT
+   
+   Contact: paradiseo-help@lists.gforge.inria.fr
+*/
+
+#ifndef __moItRandNextMove_h
+#define __moItRandNextMove_h
+
+#include "moNextMove.h"
+#include "moRandMove.h"
+
+//! One of the possible moNextMove.
+/*!
+  This class is a move (moMove) generator with a bound for the maximum number of iterations.
+*/
+template < class M > class moItRandNextMove:public moNextMove < M >
+{
+
+  //! Alias for the type.
+  typedef typename M::EOType EOT;
+
+public:
+
+  //! The constructor.
+  /*!
+     Parameters only for initialising the attributes.
+
+     \param __rand_move the random move generator.
+     \param __max_iter the iteration maximum number.
+   */
+  moItRandNextMove (moRandMove < M > &__rand_move,
+		    unsigned __max_iter):rand_move (__rand_move),
+    max_iter (__max_iter), num_iter (0)
+  {
+
+  }
+
+  //! Generation of a new move
+  /*!
+     If the maximum number is not already reached, the current move is forgotten and remplaced by another one.
+
+     \param __move the current move.
+     \param __sol the current solution.
+     \return FALSE if the maximum number of iteration is reached, else TRUE.
+   */
+  bool operator   () (M & __move, const EOT & __sol)
+  {
+
+    if (num_iter++ > max_iter)
+      {
+
+	num_iter = 0;
+	return false;
+      }
+    else
+      {
+
+	/* The given solution is discarded here */
+	rand_move (__move);
+	num_iter++;
+	return true;
+      }
+  }
+
+private:
+
+  //! A move generator (generally randomly).
+  moRandMove < M > &rand_move;
+
+  //! Iteration maximum number.
+  unsigned max_iter;
+
+  //! Iteration current number.
+  unsigned num_iter;
+
+};
+
+#endif