001 package net.sf.cpsolver.coursett.criteria;
002
003 import net.sf.cpsolver.coursett.model.Lecture;
004 import net.sf.cpsolver.coursett.model.Placement;
005 import net.sf.cpsolver.coursett.model.TimeLocation;
006 import net.sf.cpsolver.ifs.util.DataProperties;
007
008 /**
009 * Student overlapping conflicts. This criterion counts student overlapping conflicts between classes.
010 * An overlapping conflict occurs when two classes that are attended by the same student (or students)
011 * are overlapping in time (i.e., {@link TimeLocation#hasIntersection(TimeLocation)} is true).
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 StudentOverlapConflict extends StudentConflict {
034
035 @Override
036 public boolean inConflict(Placement p1, Placement p2) {
037 return !ignore(p1, p2) && overlaps(p1, p2);
038 }
039
040 @Override
041 public boolean isApplicable(Lecture l1, Lecture l2) {
042 return !ignore(l1, l2) && applicable(l1, l2); // all student conflicts (including committed)
043 }
044
045 @Override
046 public double getWeightDefault(DataProperties config) {
047 return config.getPropertyDouble("Comparator.StudentConflictWeight", 1.0);
048 }
049
050 @Override
051 public String getPlacementSelectionWeightName() {
052 return "Placement.NrStudConfsWeight";
053 }
054 }