1 /*******************************************************************************
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
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 *******************************************************************************/
28 package org.sat4j.tools;
29
30 import java.io.FileNotFoundException;
31 import java.io.FileOutputStream;
32 import java.io.PrintStream;
33
34 import org.sat4j.specs.IConstr;
35 import org.sat4j.specs.Lbool;
36 import org.sat4j.specs.SearchListener;
37
38 /**
39 * @since 2.2
40 */
41 public class DecisionLevelTracing implements SearchListener {
42
43 /**
44 *
45 */
46 private static final long serialVersionUID = 1L;
47
48 private final String filename;
49 private PrintStream out;
50
51 public DecisionLevelTracing(String filename) {
52 this.filename = filename;
53 updateWriter();
54 }
55
56 private void updateWriter() {
57 try {
58 out = new PrintStream(new FileOutputStream(filename + ".dat"));
59 } catch (FileNotFoundException e) {
60 out = System.out;
61 }
62 }
63
64 public void adding(int p) {
65 // TODO Auto-generated method stub
66
67 }
68
69 public void assuming(int p) {
70
71 }
72
73 public void backtracking(int p) {
74 // TODO Auto-generated method stub
75
76 }
77
78 public void beginLoop() {
79 // TODO Auto-generated method stub
80
81 }
82
83 public void conflictFound(IConstr confl, int dlevel, int trailLevel) {
84
85 }
86
87 public void conflictFound(int p) {
88 // TODO Auto-generated method stub
89
90 }
91
92 public void delete(int[] clause) {
93 // TODO Auto-generated method stub
94
95 }
96
97 public void end(Lbool result) {
98 out.close();
99 }
100
101 public void learn(IConstr c) {
102 // TODO Auto-generated method stub
103
104 }
105
106 public void propagating(int p, IConstr reason) {
107 // TODO Auto-generated method stub
108
109 }
110
111 public void solutionFound() {
112 // TODO Auto-generated method stub
113
114 }
115
116 public void start() {
117 updateWriter();
118 }
119
120 public void restarting() {
121 }
122
123 public void backjump(int backjumpLevel) {
124 out.println(backjumpLevel);
125 }
126
127 }