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    }