001package org.cpsolver.ifs.util; 002 003import org.apache.log4j.Logger; 004import org.cpsolver.ifs.assignment.Assignment; 005import org.cpsolver.ifs.model.Model; 006import org.cpsolver.ifs.model.Value; 007import org.cpsolver.ifs.model.Variable; 008 009/** 010 * Abstract problem loader class. 011 * 012 * @version IFS 1.3 (Iterative Forward Search)<br> 013 * Copyright (C) 2006 - 2016 Tomas Muller<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 abstract class ProblemLoader<V extends Variable<V, T>, T extends Value<V, T>, M extends Model<V,T>> implements Runnable { 032 private M iModel = null; 033 private Assignment<V, T> iAssignment = null; 034 private Callback iCallback = null; 035 036 /** 037 * Constructor 038 * 039 * @param model 040 * an empty instance of timetable model 041 * @param assignment current assignment 042 */ 043 public ProblemLoader(M model, Assignment<V, T> assignment) { 044 iModel = model; 045 iAssignment = assignment; 046 } 047 048 /** 049 * Returns provided model. 050 * 051 * @return provided model 052 */ 053 public M getModel() { 054 return iModel; 055 } 056 057 /** 058 * Returns provided assignment 059 * @return provided assignment 060 */ 061 public Assignment<V, T> getAssignment() { 062 return iAssignment; 063 } 064 065 /** 066 * Load the model. 067 * @throws Exception thrown when the load fails 068 */ 069 public abstract void load() throws Exception; 070 071 /** 072 * Sets callback class 073 * 074 * @param callback 075 * method {@link Callback#execute()} is executed when load is 076 * done 077 */ 078 public void setCallback(Callback callback) { 079 iCallback = callback; 080 } 081 082 @Override 083 public void run() { 084 try { 085 load(); 086 } catch (Exception e) { 087 Logger.getLogger(this.getClass()).error(e.getMessage(), e); 088 } finally { 089 if (iCallback != null) 090 iCallback.execute(); 091 } 092 } 093 094}