    001package org.cpsolver.studentsct.heuristics.studentord;
    002
    003import org.cpsolver.ifs.util.DataProperties;
    004import org.cpsolver.studentsct.model.Student;
    005
    006/**
    007 * Return the given set of students in an order of average number of choices of
    008 * each student (students with more choices first), however, real student are
    009 * before last-like students. By default, the order is reversed (students with
    010 * less choices first).
    011 *
    012 * @author  Tomáš Müller
    013 * @version StudentSct 1.3 (Student Sectioning)<br>
    014 *          Copyright (C) 2007 - 2014 Tomáš Müller<br>
    015 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    016 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    017 * <br>
    018 *          This library is free software; you can redistribute it and/or modify
    019 *          it under the terms of the GNU Lesser General Public License as
    020 *          published by the Free Software Foundation; either version 3 of the
    021 *          License, or (at your option) any later version. <br>
    022 * <br>
    023 *          This library is distributed in the hope that it will be useful, but
    024 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    025 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    026 *          Lesser General Public License for more details. <br>
    027 * <br>
    028 *          You should have received a copy of the GNU Lesser General Public
    029 *          License along with this library; if not see
    030 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    031 */
    032public class StudentChoiceRealFirstOrder extends StudentChoiceOrder {
    033
    034    public StudentChoiceRealFirstOrder(DataProperties config) {
    035        super(config);
    036    }
    037
    038    public StudentChoiceRealFirstOrder() {
    039        super(new DataProperties());
    040        setReverse(true);
    041    }
    042
    043    @Override
    044    public int compare(Student s1, Student s2) {
    045        if (s1.isDummy()) {
    046            if (!s2.isDummy())
    047                return 1;
    048        } else if (s2.isDummy())
    049            return -1;
    050        return super.compare(s1, s2);
    051    }
    052
    053}