001package org.cpsolver.coursett.criteria.placement; 002 003import java.util.Set; 004 005import org.cpsolver.coursett.model.Lecture; 006import org.cpsolver.coursett.model.Placement; 007import org.cpsolver.ifs.assignment.Assignment; 008 009 010/** 011 * Use conflict-based statistics to compute potential hard conflicts. 012 * <br> 013 * 014 * @version CourseTT 1.3 (University Course Timetabling)<br> 015 * Copyright (C) 2006 - 2014 Tomáš Müller<br> 016 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br> 017 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br> 018 * <br> 019 * This library is free software; you can redistribute it and/or modify 020 * it under the terms of the GNU Lesser General Public License as 021 * published by the Free Software Foundation; either version 3 of the 022 * License, or (at your option) any later version. <br> 023 * <br> 024 * This library is distributed in the hope that it will be useful, but 025 * WITHOUT ANY WARRANTY; without even the implied warranty of 026 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 027 * Lesser General Public License for more details. <br> 028 * <br> 029 * You should have received a copy of the GNU Lesser General Public 030 * License along with this library; if not see 031 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>. 032 */ 033public class PotentialHardConflicts extends WeightedHardConflicts { 034 035 @Override 036 public String getPlacementSelectionWeightName() { 037 return "Placement.NrPotentialConflictsWeight"; 038 } 039 040 @Override 041 public double getValue(Assignment<Lecture, Placement> assignment, Placement value, Set<Placement> conflicts) { 042 if (iStat != null && conflicts != null && !conflicts.isEmpty()) { 043 return iStat.countPotentialConflicts(assignment, ((IterationContext)getContext(assignment)).getIteration(), value, 3); 044 } else { 045 return 0.0; 046 } 047 } 048 049 @Override 050 public double getPlacementSelectionWeightDefault(int level) { 051 return 0.0; 052 } 053 054}