001 package net.sf.cpsolver.coursett.criteria;
002
003 import net.sf.cpsolver.coursett.model.Lecture;
004 import net.sf.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 1.2 (University Course Timetabling)<br>
013 * Copyright (C) 2006 - 2011 Tomas Muller<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 */
031 public class StudentHardConflict extends StudentConflict {
032
033 @Override
034 public boolean isApplicable(Lecture l1, Lecture l2) {
035 return !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 }