001 package net.sf.cpsolver.exam.criteria;
002
003 import java.util.Set;
004
005 import net.sf.cpsolver.exam.model.Exam;
006 import net.sf.cpsolver.exam.model.ExamInstructor;
007 import net.sf.cpsolver.exam.model.ExamPlacement;
008 import net.sf.cpsolver.ifs.util.DataProperties;
009
010 /**
011 * Number of more than two exams a day instructor conflicts. I.e., when an
012 * exam is attended by an instructor student that attends two or more other
013 * exams at the same day.
014 * <br><br>
015 * More than two exams a day instructor conflict weight can be set by
016 * problem property Exams.InstructorMoreThanTwoADayWeight, or in the input
017 * xml file, property instructorMoreThanTwoADayWeight.
018 *
019 * <br>
020 *
021 * @version ExamTT 1.2 (Examination Timetabling)<br>
022 * Copyright (C) 2008 - 2012 Tomas Muller<br>
023 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
024 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
025 * <br>
026 * This library is free software; you can redistribute it and/or modify
027 * it under the terms of the GNU Lesser General Public License as
028 * published by the Free Software Foundation; either version 3 of the
029 * License, or (at your option) any later version. <br>
030 * <br>
031 * This library is distributed in the hope that it will be useful, but
032 * WITHOUT ANY WARRANTY; without even the implied warranty of
033 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
034 * Lesser General Public License for more details. <br>
035 * <br>
036 * You should have received a copy of the GNU Lesser General Public
037 * License along with this library; if not see
038 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
039 */
040 public class InstructorMoreThan2ADayConflicts extends StudentMoreThan2ADayConflicts {
041
042 @Override
043 public String getWeightName() {
044 return "Exams.InstructorMoreThanTwoADayWeight";
045 }
046
047 @Override
048 public String getXmlWeightName() {
049 return "instructorMoreThanTwoADayWeight";
050 }
051
052 @Override
053 public double getWeightDefault(DataProperties config) {
054 return 100.0;
055 }
056
057 @Override
058 public double getValue(ExamPlacement value, Set<ExamPlacement> conflicts) {
059 Exam exam = value.variable();
060 int penalty = 0;
061 for (ExamInstructor s : exam.getInstructors()) {
062 Set<Exam> exams = s.getExamsADay(value.getPeriod());
063 int nrExams = exams.size() + (exams.contains(exam) ? 0 : 1);
064 if (nrExams > 2)
065 penalty++;
066 }
067 return penalty;
068 }
069
070 @Override
071 public String getName() {
072 return "Instructor More Than 2 A Day Conflicts";
073 }
074
075 @Override
076 public String toString() {
077 return "iM2D:" + sDoubleFormat.format(getValue());
078 }
079 }