001package net.sf.cpsolver.exam.criteria; 002 003import java.util.Map; 004import java.util.Set; 005 006import net.sf.cpsolver.exam.model.ExamPlacement; 007import net.sf.cpsolver.ifs.util.DataProperties; 008 009/** 010 * Cost for using more than one room (nrSplits^2). 011 * <br><br> 012 * A weight for room split penalty can be set by problem 013 * property Exams.RoomSplitWeight, or in the input xml file, property 014 * roomSplitWeight. 015 * 016 * <br> 017 * 018 * @version ExamTT 1.2 (Examination Timetabling)<br> 019 * Copyright (C) 2008 - 2012 Tomáš Müller<br> 020 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br> 021 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br> 022 * <br> 023 * This library is free software; you can redistribute it and/or modify 024 * it under the terms of the GNU Lesser General Public License as 025 * published by the Free Software Foundation; either version 3 of the 026 * License, or (at your option) any later version. <br> 027 * <br> 028 * This library is distributed in the hope that it will be useful, but 029 * WITHOUT ANY WARRANTY; without even the implied warranty of 030 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 031 * Lesser General Public License for more details. <br> 032 * <br> 033 * You should have received a copy of the GNU Lesser General Public 034 * License along with this library; if not see 035 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>. 036 */ 037public class RoomSplitPenalty extends ExamCriterion { 038 private int iRoomSplits[] = new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; 039 040 @Override 041 public String getWeightName() { 042 return "Exams.RoomSplitWeight"; 043 } 044 045 @Override 046 public String getXmlWeightName() { 047 return "roomSplitWeight"; 048 } 049 050 @Override 051 public double getWeightDefault(DataProperties config) { 052 return 10.0; 053 } 054 055 @Override 056 public double getValue(ExamPlacement value, Set<ExamPlacement> conflicts) { 057 return (value.getRoomPlacements() == null || value.getRoomPlacements().size() <= 1 ? 0 : (value.getRoomPlacements().size() - 1) * (value.getRoomPlacements().size() - 1)); 058 } 059 060 @Override 061 public void beforeUnassigned(long iteration, ExamPlacement value) { 062 super.beforeUnassigned(iteration, value); 063 if (value.getRoomPlacements() == null || value.getRoomPlacements().size() > 1) 064 iRoomSplits[value.getRoomPlacements().size() - 2] --; 065 } 066 067 @Override 068 public void afterAssigned(long iteration, ExamPlacement value) { 069 super.afterAssigned(iteration, value); 070 if (value.getRoomPlacements() == null || value.getRoomPlacements().size() > 1) 071 iRoomSplits[value.getRoomPlacements().size() - 2] ++; 072 } 073 074 @Override 075 public void getInfo(Map<String, String> info) { 076 if (getValue() != 0.0) { 077 String split = ""; 078 for (int i = 0; i < iRoomSplits.length; i++) { 079 if (iRoomSplits[i] > 0) { 080 if (split.length() > 0) 081 split += ", "; 082 split += iRoomSplits[i] + "×" + (i + 2); 083 } 084 } 085 info.put(getName(), sDoubleFormat.format(getValue()) + " (" + split + ")"); 086 } 087 } 088 089 @Override 090 public String toString() { 091 return "RSp:" + sDoubleFormat.format(getValue()); 092 } 093 094 @Override 095 public boolean isPeriodCriterion() { return false; } 096}