    001package net.sf.cpsolver.exam.criteria;
    002
    003import java.util.Map;
    004import java.util.Set;
    005
    006import net.sf.cpsolver.exam.model.Exam;
    007import net.sf.cpsolver.exam.model.ExamPlacement;
    008import net.sf.cpsolver.exam.model.ExamStudent;
    009
    010/**
    011 * Number of direct student conflicts caused by the fact that a student is
    012 * not available.
    013 * <br><br>
    014 * Direct student conflict weight can be set by problem property
    015 * Exams.DirectConflictWeight, or in the input xml file, property
    016 * directConflictWeight.
    017 *
    018 * <br>
    019 *
    020 * @version ExamTT 1.2 (Examination Timetabling)<br>
    021 *          Copyright (C) 2008 - 2012 Tomáš Müller<br>
    022 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    023 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    024 * <br>
    025 *          This library is free software; you can redistribute it and/or modify
    026 *          it under the terms of the GNU Lesser General Public License as
    027 *          published by the Free Software Foundation; either version 3 of the
    028 *          License, or (at your option) any later version. <br>
    029 * <br>
    030 *          This library is distributed in the hope that it will be useful, but
    031 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    032 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    033 *          Lesser General Public License for more details. <br>
    034 * <br>
    035 *          You should have received a copy of the GNU Lesser General Public
    036 *          License along with this library; if not see
    037 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    038 */
    039public class StudentNotAvailableConflicts extends StudentDirectConflicts {
    040
    041    @Override
    042    public double getValue(ExamPlacement value, Set<ExamPlacement> conflicts) {
    043        Exam exam = value.variable();
    044        int penalty = 0;
    045        for (ExamStudent s : exam.getStudents()) {
    046            if (!s.isAvailable(value.getPeriod()))
    047                penalty++;
    048        }
    049        return penalty;
    050    }
    051
    052    @Override
    053    public String getName() {
    054        return "Not Available Conflicts";
    055    }
    056
    057    @Override
    058    public void getInfo(Map<String, String> info) {
    059    }
    060
    061    @Override
    062    public String toString() {
    063        return (getValue() <= 0.0 ? "" : "NA:" + sDoubleFormat.format(getValue()));
    064    }
    065
    066}