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.IConstr;
33 import org.sat4j.specs.ISolverService;
34 import org.sat4j.specs.Lbool;
35
36 /**
37 * @since 2.2
38 */
39 public class DecisionLevelTracing extends SearchListenerAdapter<ISolverService> {
40
41 /**
42 *
43 */
44 private static final long serialVersionUID = 1L;
45
46 private int counter;
47
48 private final IVisualizationTool visuTool;
49
50 public DecisionLevelTracing(IVisualizationTool visuTool) {
51 this.visuTool = visuTool;
52 visuTool.init();
53 this.counter = 0;
54 }
55
56 @Override
57 public void conflictFound(IConstr confl, int dlevel, int trailLevel) {
58 this.counter++;
59 }
60
61 @Override
62 public void end(Lbool result) {
63 this.visuTool.end();
64 }
65
66 @Override
67 public void start() {
68 this.visuTool.init();
69 }
70
71 @Override
72 public void backjump(int backjumpLevel) {
73 this.visuTool.addPoint(this.counter, backjumpLevel);
74 }
75
76 }