001 package net.sf.cpsolver.coursett.criteria.additional;
002
003
004 import net.sf.cpsolver.coursett.criteria.StudentHardConflict;
005 import net.sf.cpsolver.coursett.model.Lecture;
006 import net.sf.cpsolver.ifs.util.DataProperties;
007
008 /**
009 * Quadratic student conflicts. Same as {@link StudentHardConflict}, however,
010 * student joint enrollments are squared (1 conflict counts as 1, 2 as 4, 3 as 9, etc.).
011 *
012 * <br>
013 *
014 * @version CourseTT 1.2 (University Course Timetabling)<br>
015 * Copyright (C) 2006 - 2011 Tomas Muller<br>
016 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
017 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
018 * <br>
019 * This library is free software; you can redistribute it and/or modify
020 * it under the terms of the GNU Lesser General Public License as
021 * published by the Free Software Foundation; either version 3 of the
022 * License, or (at your option) any later version. <br>
023 * <br>
024 * This library is distributed in the hope that it will be useful, but
025 * WITHOUT ANY WARRANTY; without even the implied warranty of
026 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
027 * Lesser General Public License for more details. <br>
028 * <br>
029 * You should have received a copy of the GNU Lesser General Public
030 * License along with this library; if not see
031 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
032 */
033 public class QuadraticStudentHardConflict extends QuadraticStudentConflict {
034
035 @Override
036 public boolean isApplicable(Lecture l1, Lecture l2) {
037 return hard(l1, l2);
038 }
039
040 @Override
041 public double getWeightDefault(DataProperties config) {
042 return config.getPropertyDouble("Comparator.HardStudentConflictWeight", 5.0);
043 }
044
045 @Override
046 public String getPlacementSelectionWeightName() {
047 return "Placement.NrHardStudConfsWeight";
048 }
049
050 }