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 * @version StudentSct 1.3 (Student Sectioning)<br> 013 * Copyright (C) 2007 - 2014 Tomáš Müller<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 */ 031public 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}