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 * @author  Tomáš Müller
016 * @version CourseTT 1.3 (University Course Timetabling)<br>
017 *          Copyright (C) 2006 - 2014 Tomáš Müller<br>
018 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
019 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
020 * <br>
021 *          This library is free software; you can redistribute it and/or modify
022 *          it under the terms of the GNU Lesser General Public License as
023 *          published by the Free Software Foundation; either version 3 of the
024 *          License, or (at your option) any later version. <br>
025 * <br>
026 *          This library is distributed in the hope that it will be useful, but
027 *          WITHOUT ANY WARRANTY; without even the implied warranty of
028 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
029 *          Lesser General Public License for more details. <br>
030 * <br>
031 *          You should have received a copy of the GNU Lesser General Public
032 *          License along with this library; if not see
033 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
034 */
035public class HardConflicts extends PlacementSelectionCriterion {
036        
037    @Override
038    public String getPlacementSelectionWeightName() {
039        return "Placement.NrConflictsWeight";
040    }
041
042    @Override
043    public double getValue(Assignment<Lecture, Placement> assignment, Placement value, Set<Placement> conflicts) {
044        return (conflicts == null ? 0 : conflicts.size());
045    }
046    
047    @Override
048    public double getPlacementSelectionWeightDefault(int level) {
049        return (level == 0 ? 3.0 : 0.0);
050    }
051
052}