001package org.cpsolver.coursett.criteria.placement;
002
003import java.util.Set;
004
005import org.cpsolver.coursett.model.Lecture;
006import org.cpsolver.coursett.model.Placement;
007import org.cpsolver.ifs.assignment.Assignment;
008
009
010/**
011 * Number of values (of other variables) that have to be unassigned in order before
012 * this value can be assigned.
013 * <br>
014 * 
015 * @version CourseTT 1.3 (University Course Timetabling)<br>
016 *          Copyright (C) 2006 - 2014 Tomáš Müller<br>
017 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
018 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
019 * <br>
020 *          This library is free software; you can redistribute it and/or modify
021 *          it under the terms of the GNU Lesser General Public License as
022 *          published by the Free Software Foundation; either version 3 of the
023 *          License, or (at your option) any later version. <br>
024 * <br>
025 *          This library is distributed in the hope that it will be useful, but
026 *          WITHOUT ANY WARRANTY; without even the implied warranty of
027 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
028 *          Lesser General Public License for more details. <br>
029 * <br>
030 *          You should have received a copy of the GNU Lesser General Public
031 *          License along with this library; if not see
032 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
033 */
034public class HardConflicts extends PlacementSelectionCriterion {
035        
036    @Override
037    public String getPlacementSelectionWeightName() {
038        return "Placement.NrConflictsWeight";
039    }
040
041    @Override
042    public double getValue(Assignment<Lecture, Placement> assignment, Placement value, Set<Placement> conflicts) {
043        return (conflicts == null ? 0 : conflicts.size());
044    }
045    
046    @Override
047    public double getPlacementSelectionWeightDefault(int level) {
048        return (level == 0 ? 3.0 : 0.0);
049    }
050
051}