    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}