001package net.sf.cpsolver.coursett.criteria; 002 003import java.util.Collection; 004import java.util.Set; 005 006import net.sf.cpsolver.coursett.Constants; 007import net.sf.cpsolver.coursett.model.Lecture; 008import net.sf.cpsolver.coursett.model.Placement; 009 010/** 011 * Room violations. This criterion counts how many times a prohibited room is assigned 012 * to a class in interactive timetabling. 013 * <br> 014 * 015 * @version CourseTT 1.2 (University Course Timetabling)<br> 016 * Copyright (C) 2006 - 2011 Tomáš Müller<br> 017 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br> 018 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br> 019 * <br> 020 * This library is free software; you can redistribute it and/or modify 021 * it under the terms of the GNU Lesser General Public License as 022 * published by the Free Software Foundation; either version 3 of the 023 * License, or (at your option) any later version. <br> 024 * <br> 025 * This library is distributed in the hope that it will be useful, but 026 * WITHOUT ANY WARRANTY; without even the implied warranty of 027 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 028 * Lesser General Public License for more details. <br> 029 * <br> 030 * You should have received a copy of the GNU Lesser General Public 031 * License along with this library; if not see 032 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>. 033 */ 034public class RoomViolations extends TimetablingCriterion { 035 036 protected boolean violation(Placement value) { 037 int pref = value.getRoomPreference(); 038 return pref > Constants.sPreferenceLevelProhibited / 2; 039 } 040 041 @Override 042 public double getValue(Placement value, Set<Placement> conflicts) { 043 if (value.variable().isCommitted()) return 0.0; 044 double ret = (violation(value) ? 1.0 : 0.0); 045 if (conflicts != null) 046 for (Placement conflict: conflicts) 047 ret -= (violation(conflict) ? 1.0 : 0.0); 048 return ret; 049 } 050 051 @Override 052 public double[] getBounds() { 053 return new double[] { getModel().variables().size(), 0.0 }; 054 } 055 056 @Override 057 public double[] getBounds(Collection<Lecture> variables) { 058 return new double[] { variables.size(), 0.0 }; 059 } 060 061}