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; 009import net.sf.cpsolver.ifs.util.DataProperties; 010 011/** 012 * Number of more than two exams a day student conflicts. I.e., when an 013 * exam is attended by a student student that attends two or more other 014 * exams at the same day. 015 * <br><br> 016 * More than two exams a day student conflict weight can be set by 017 * problem property Exams.MoreThanTwoADayWeight, or in the input 018 * xml file, property moreThanTwoADayWeight. 019 * 020 * <br> 021 * 022 * @version ExamTT 1.2 (Examination Timetabling)<br> 023 * Copyright (C) 2008 - 2012 Tomáš Müller<br> 024 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br> 025 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br> 026 * <br> 027 * This library is free software; you can redistribute it and/or modify 028 * it under the terms of the GNU Lesser General Public License as 029 * published by the Free Software Foundation; either version 3 of the 030 * License, or (at your option) any later version. <br> 031 * <br> 032 * This library is distributed in the hope that it will be useful, but 033 * WITHOUT ANY WARRANTY; without even the implied warranty of 034 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 035 * Lesser General Public License for more details. <br> 036 * <br> 037 * You should have received a copy of the GNU Lesser General Public 038 * License along with this library; if not see 039 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>. 040 */ 041public class StudentMoreThan2ADayConflicts extends ExamCriterion { 042 043 @Override 044 public String getWeightName() { 045 return "Exams.MoreThanTwoADayWeight"; 046 } 047 048 @Override 049 public double getWeightDefault(DataProperties config) { 050 return 100.0; 051 } 052 053 @Override 054 public double getValue(ExamPlacement value, Set<ExamPlacement> conflicts) { 055 Exam exam = value.variable(); 056 int penalty = 0; 057 for (ExamStudent s : exam.getStudents()) { 058 Set<Exam> exams = s.getExamsADay(value.getPeriod()); 059 int nrExams = exams.size() + (exams.contains(exam) ? 0 : 1); 060 if (nrExams > 2) 061 penalty++; 062 } 063 return penalty; 064 } 065 066 @Override 067 public String getName() { 068 return "More Than 2 A Day Conflicts"; 069 } 070 071 @Override 072 public String getXmlWeightName() { 073 return "moreThanTwoADayWeight"; 074 } 075 076 @Override 077 public void getInfo(Map<String, String> info) { 078 if (getValue() != 0.0) 079 info.put(getName(), sDoubleFormat.format(getValue())); 080 } 081 082 @Override 083 public String toString() { 084 return "M2D:" + sDoubleFormat.format(getValue()); 085 } 086}