31a487ec4a
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@594 331e1502-861f-0410-8da2-ba01fb791d7f
104 lines
2.1 KiB
C++
Executable file
104 lines
2.1 KiB
C++
Executable file
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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// "moFirstImprSelect.h"
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// (c) OPAC Team, LIFL, 2003-2006
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/* LICENCE TEXT
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Contact: paradiseo-help@lists.gforge.inria.fr
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*/
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#ifndef __moFirstImprSelect_h
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#define __moFirstImprSelect_h
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#include "moMoveSelect.h"
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//! One possible moMoveSelect.
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/*!
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The neighborhood is explored until
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a move enables an improvment of the
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current solution.
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*/
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template < class M > class moFirstImprSelect:public moMoveSelect < M >
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{
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public:
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//! Alias for the fitness.
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typedef typename M::EOType::Fitness Fitness;
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//! Procedure which initialise the exploration.
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/*!
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It save the current fitness as the initial value for the fitness.
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*/
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virtual void init (const Fitness & __fit)
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{
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valid = false;
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init_fit = __fit;
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}
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//!Function that indicates if the current move has not improved the fitness.
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/*!
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If the given fitness enables an improvment,
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the move (moMove) should be applied to the current solution.
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\param __move a move.
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\param __fit a fitness linked to the move.
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\return TRUE if the move does not improve the fitness.
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*/
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bool update (const M & __move, const typename M::EOType::Fitness & __fit)
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{
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if (__fit > init_fit)
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{
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best_fit = __fit;
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best_move = __move;
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valid = true;
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return false;
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}
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else
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{
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return true;
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}
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}
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//! Procedure which saved the best move and fitness.
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/*!
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\param __move the current move (result of the procedure).
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\param __fit the current fitness (result of the procedure).
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\throws EmptySelection if no move has improved the fitness.
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*/
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void operator () (M & __move, Fitness & __fit) throw (EmptySelection)
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{
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if (valid)
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{
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__move = best_move;
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__fit = best_fit;
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}
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else
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throw EmptySelection ();
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}
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private:
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//! Allow to know if at least one move has improved the solution.
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bool valid;
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//! Best stored movement.
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M best_move;
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//! Initial fitness.
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Fitness init_fit;
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//! Best stored fitness.
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Fitness best_fit;
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};
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#endif
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