    001package net.sf.cpsolver.exam.criteria;
    002
    003import java.util.Set;
    004
    005import net.sf.cpsolver.exam.model.Exam;
    006import net.sf.cpsolver.exam.model.ExamInstructor;
    007import net.sf.cpsolver.exam.model.ExamPlacement;
    008import 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 Tomáš Müller<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 */
    040public 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}