001package org.cpsolver.coursett.criteria;
002
003import org.cpsolver.coursett.model.Lecture;
004import org.cpsolver.coursett.model.Placement;
005import org.cpsolver.coursett.model.TimeLocation;
006import org.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 1.3 (University Course Timetabling)<br>
015 *          Copyright (C) 2006 - 2014 Tomáš Müller<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 */
033public class StudentOverlapConflict extends StudentConflict {
034    
035    @Override
036    public boolean inConflict(Placement p1, Placement p2) {
037        return overlaps(p1, p2);
038    }
039    
040    @Override
041    public boolean isApplicable(Lecture l1, Lecture l2) {
042        return l1 != null && l2 != null && !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}