1 /*******************************************************************************
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004, 2012 Artois University and CNRS
3 *
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
8 *
9 * Alternatively, the contents of this file may be used under the terms of
10 * either the GNU Lesser General Public License Version 2.1 or later (the
11 * "LGPL"), in which case the provisions of the LGPL are applicable instead
12 * of those above. If you wish to allow use of your version of this file only
13 * under the terms of the LGPL, and not to allow others to use your version of
14 * this file under the terms of the EPL, indicate your decision by deleting
15 * the provisions above and replace them with the notice and other provisions
16 * required by the LGPL. If you do not delete the provisions above, a recipient
17 * may use your version of this file under the terms of the EPL or the LGPL.
18 *
19 * Based on the original MiniSat specification from:
20 *
21 * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the
22 * Sixth International Conference on Theory and Applications of Satisfiability
23 * Testing, LNCS 2919, pp 502-518, 2003.
24 *
25 * See www.minisat.se for the original solver in C++.
26 *
27 * Contributors:
28 * CRIL - initial API and implementation
29 *******************************************************************************/
30 package org.sat4j.tools;
31
32 import org.sat4j.specs.ISolverService;
33 import org.sat4j.specs.RandomAccessModel;
34
35 public class HeuristicsTracing extends SearchListenerAdapter<ISolverService> {
36
37 /**
38 *
39 */
40 private static final long serialVersionUID = 1L;
41 private ISolverService solverService;
42 private final IVisualizationTool visuTool;
43
44 public HeuristicsTracing(IVisualizationTool visuTool) {
45 this.visuTool = visuTool;
46 }
47
48 @Override
49 public void solutionFound(int[] model, RandomAccessModel lazyModel) {
50 trace();
51 }
52
53 @Override
54 public void restarting() {
55 trace();
56 }
57
58 private void trace() {
59 this.visuTool.init();
60
61 int n = this.solverService.nVars();
62 double[] heuristics = this.solverService.getVariableHeuristics();
63 for (int i = 1; i <= n; i++) {
64 this.visuTool.addPoint(heuristics[i], i);
65 }
66 this.visuTool.end();
67 }
68
69 @Override
70 public void init(ISolverService solverService) {
71 this.solverService = solverService;
72 }
73 }