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.minisat.learning;
29
30 import org.sat4j.minisat.core.Constr;
31 import org.sat4j.minisat.core.DataStructureFactory;
32 import org.sat4j.minisat.core.Solver;
33
34 /**
35 * MiniSAT learning scheme.
36 *
37 * The Data Structure Factory is expected to be set thanks to the
38 * appropriate setter method before using it.
39 *
40 * It was not possible to set it in the constructor.
41 *
42 * @author leberre
43 */
44 public class MiniSATLearning<D extends DataStructureFactory> extends AbstractLearning<D> {
45 private static final long serialVersionUID = 1L;
46
47 private DataStructureFactory dsf;
48
49 public void setDataStructureFactory(DataStructureFactory dsf) {
50 this.dsf = dsf;
51 }
52
53 @Override
54 public void setSolver(Solver<D> s) {
55 super.setSolver(s);
56 this.dsf = s.getDSFactory();
57 }
58
59 public void learns(Constr constr) {
60 // va contenir une nouvelle clause ou null si la clause est unitaire
61 claBumpActivity(constr);
62 dsf.learnConstraint(constr);
63 }
64
65 /* (non-Javadoc)
66 * @see java.lang.Object#toString()
67 */
68 @Override
69 public String toString() {
70 return "Learn all clauses as in MiniSAT";
71 }
72
73 }