001    package net.sf.cpsolver.studentsct.heuristics.studentord;
002    
003    import net.sf.cpsolver.ifs.util.DataProperties;
004    import net.sf.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     * @version StudentSct 1.2 (Student Sectioning)<br>
013     *          Copyright (C) 2007 - 2010 Tomas Muller<br>
014     *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
015     *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
016     * <br>
017     *          This library is free software; you can redistribute it and/or modify
018     *          it under the terms of the GNU Lesser General Public License as
019     *          published by the Free Software Foundation; either version 3 of the
020     *          License, or (at your option) any later version. <br>
021     * <br>
022     *          This library is distributed in the hope that it will be useful, but
023     *          WITHOUT ANY WARRANTY; without even the implied warranty of
024     *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
025     *          Lesser General Public License for more details. <br>
026     * <br>
027     *          You should have received a copy of the GNU Lesser General Public
028     *          License along with this library; if not see
029     *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
030     */
031    public class StudentChoiceRealFirstOrder extends StudentChoiceOrder {
032    
033        public StudentChoiceRealFirstOrder(DataProperties config) {
034            super(config);
035        }
036    
037        public StudentChoiceRealFirstOrder() {
038            super(new DataProperties());
039            setReverse(true);
040        }
041    
042        @Override
043        public int compare(Student s1, Student s2) {
044            if (s1.isDummy()) {
045                if (!s2.isDummy())
046                    return 1;
047            } else if (s2.isDummy())
048                return -1;
049            return super.compare(s1, s2);
050        }
051    
052    }