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.ISolver;
33 import org.sat4j.specs.IVecInt;
34 import org.sat4j.specs.TimeoutException;
35
36 /**
37 * This class allow to use the ModelIterator class as a solver.
38 *
39 * @author lonca
40 */
41 public class ModelIteratorToSATAdapter extends ModelIterator {
42
43 /**
44 *
45 */
46 private static final long serialVersionUID = 1L;
47 private int[] lastModel = null;
48 private final SolutionFoundListener sfl;
49
50 public ModelIteratorToSATAdapter(ISolver solver, SolutionFoundListener sfl) {
51 this(solver, Long.MAX_VALUE, sfl);
52 }
53
54 public ModelIteratorToSATAdapter(ISolver solver, long bound,
55 SolutionFoundListener sfl) {
56 super(solver, bound);
57 this.sfl = sfl;
58 }
59
60 @Override
61 public boolean isSatisfiable() throws TimeoutException {
62 boolean isSat = false;
63 while (super.isSatisfiable()) {
64 isSat = true;
65 lastModel = super.model();
66 this.sfl.onSolutionFound(lastModel);
67 }
68 return isSat;
69 }
70
71 @Override
72 public boolean isSatisfiable(IVecInt assumps) throws TimeoutException {
73 boolean isSat = false;
74 while (super.isSatisfiable(assumps)) {
75 isSat = true;
76 lastModel = super.model();
77 this.sfl.onSolutionFound(lastModel);
78 }
79 return isSat;
80 }
81
82 @Override
83 public int[] model() {
84 return this.lastModel;
85 }
86
87 }