    001package org.cpsolver.coursett.criteria;
    002
    003import org.cpsolver.coursett.model.Lecture;
    004import org.cpsolver.ifs.util.DataProperties;
    005
    006/**
    007 * Student hard conflicts. This criterion counts student conflicts (either overlapping or
    008 * distance) between classes. A hard conflict is a student conflict that happens between
    009 * two classes that do not have alternatives (see {@link Lecture#isSingleSection()}).
    010 * <br>
    011 *
    012 * @version CourseTT 1.3 (University Course Timetabling)<br>
    013 *          Copyright (C) 2006 - 2014 Tomáš Müller<br>
    014 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    015 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    016 * <br>
    017 *          This library is free software; you can redistribute it and/or modify
    018 *          it under the terms of the GNU Lesser General Public License as
    019 *          published by the Free Software Foundation; either version 3 of the
    020 *          License, or (at your option) any later version. <br>
    021 * <br>
    022 *          This library is distributed in the hope that it will be useful, but
    023 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    024 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    025 *          Lesser General Public License for more details. <br>
    026 * <br>
    027 *          You should have received a copy of the GNU Lesser General Public
    028 *          License along with this library; if not see
    029 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    030 */
    031public class StudentHardConflict extends StudentConflict {
    032
    033    @Override
    034    public boolean isApplicable(Lecture l1, Lecture l2) {
    035        return l1 != null && l2 != null && !ignore(l1, l2) && hard(l1, l2); // only hard student conflicts, but including committed
    036    }
    037
    038    @Override
    039    public double getWeightDefault(DataProperties config) {
    040        return config.getPropertyDouble("Comparator.HardStudentConflictWeight", 5.0);
    041    }
    042
    043    @Override
    044    public String getPlacementSelectionWeightName() {
    045        return "Placement.NrHardStudConfsWeight";
    046    }
    047}