001    package net.sf.cpsolver.coursett.criteria.placement;
002    
003    import java.util.Set;
004    
005    import net.sf.cpsolver.coursett.model.Placement;
006    
007    /**
008     * Use conflict-based statistics to compute potential hard conflicts.
009     * <br>
010     * 
011     * @version CourseTT 1.2 (University Course Timetabling)<br>
012     *          Copyright (C) 2006 - 2011 Tomas Muller<br>
013     *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
014     *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
015     * <br>
016     *          This library is free software; you can redistribute it and/or modify
017     *          it under the terms of the GNU Lesser General Public License as
018     *          published by the Free Software Foundation; either version 3 of the
019     *          License, or (at your option) any later version. <br>
020     * <br>
021     *          This library is distributed in the hope that it will be useful, but
022     *          WITHOUT ANY WARRANTY; without even the implied warranty of
023     *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
024     *          Lesser General Public License for more details. <br>
025     * <br>
026     *          You should have received a copy of the GNU Lesser General Public
027     *          License along with this library; if not see
028     *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
029     */
030    public class PotentialHardConflicts extends WeightedHardConflicts {
031        
032        @Override
033        public String getPlacementSelectionWeightName() {
034            return "Placement.NrPotentialConflictsWeight";
035        }
036    
037        @Override
038        public double getValue(Placement value, Set<Placement> conflicts) {
039            return (iStat == null ? 0.0 : iStat.countPotentialConflicts(iIteration, value, 3));
040        }
041        
042        @Override
043        public double getPlacementSelectionWeightDefault(int level) {
044            return 0.0;
045        }
046    
047    }