001 package net.sf.cpsolver.coursett.criteria;
002
003 import java.util.Collection;
004 import java.util.Set;
005
006 import net.sf.cpsolver.coursett.model.Lecture;
007 import net.sf.cpsolver.coursett.model.Placement;
008 import net.sf.cpsolver.ifs.util.DataProperties;
009
010 /**
011 * Student committed conflicts. This criterion counts student conflicts between pairs of classes where
012 * one the classes is committed (i.e., fixed in time and room, belonging to another problem).
013 * <br>
014 *
015 * @version CourseTT 1.2 (University Course Timetabling)<br>
016 * Copyright (C) 2006 - 2011 Tomas Muller<br>
017 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
018 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
019 * <br>
020 * This library is free software; you can redistribute it and/or modify
021 * it under the terms of the GNU Lesser General Public License as
022 * published by the Free Software Foundation; either version 3 of the
023 * License, or (at your option) any later version. <br>
024 * <br>
025 * This library is distributed in the hope that it will be useful, but
026 * WITHOUT ANY WARRANTY; without even the implied warranty of
027 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
028 * Lesser General Public License for more details. <br>
029 * <br>
030 * You should have received a copy of the GNU Lesser General Public
031 * License along with this library; if not see
032 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
033 */
034 public class StudentCommittedConflict extends StudentConflict {
035
036 @Override
037 public double getWeightDefault(DataProperties config) {
038 return config.getPropertyDouble("Comparator.CommitedStudentConflictWeight", 1.0);
039 }
040
041 @Override
042 public String getPlacementSelectionWeightName() {
043 return "Placement.NrCommitedStudConfsWeight";
044 }
045
046 @Override
047 public boolean isApplicable(Lecture l1, Lecture l2) {
048 return !ignore(l1, l2) && committed(l1, l2); // only committed student conflicts
049 }
050
051
052 @Override
053 public boolean inConflict(Placement p1, Placement p2) {
054 return !ignore(p1, p2) && committed(p1, p2) && super.inConflict(p1, p2);
055 }
056
057 @Override
058 public double[] getBounds(Collection<Lecture> variables) {
059 double[] bounds = super.getBounds(variables);
060 for (Lecture lecture: variables) {
061 Double max = null;
062 for (Placement placement: lecture.values()) {
063 if (max == null) { max = new Double(lecture.getCommitedConflicts(placement)); continue; }
064 max = Math.max(max, lecture.getCommitedConflicts(placement));
065 }
066 if (max != null) bounds[0] += max;
067 }
068 return bounds;
069 }
070
071 @Override
072 public double getValue(Placement value, Set<Placement> conflicts) {
073 double ret = super.getValue(value, conflicts);
074 ret += value.variable().getCommitedConflicts(value);
075 if (iIncludeConflicts && conflicts != null)
076 for (Placement conflict: conflicts)
077 ret -= value.variable().getCommitedConflicts(conflict);
078 return ret;
079 }
080
081 @Override
082 public double getValue(Collection<Lecture> variables) {
083 double ret = super.getValue(variables);
084 for (Lecture lect: variables)
085 if (lect.getAssignment() != null)
086 ret += lect.getCommitedConflicts(lect.getAssignment());
087 return Math.round(ret);
088 }
089 }