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.minisat.learning;
31
32 import org.sat4j.minisat.core.Constr;
33 import org.sat4j.minisat.core.DataStructureFactory;
34 import org.sat4j.minisat.core.LearningStrategy;
35 import org.sat4j.minisat.core.Solver;
36 import org.sat4j.minisat.core.VarActivityListener;
37
38 /**
39 * An abstract learning strategy.
40 *
41 * The Variable Activity Listener is expected to be set thanks to the
42 * appropriate setter method before using it.
43 *
44 * It was not possible to set it in the constructor.
45 *
46 * @author daniel
47 *
48 */
49 abstract class AbstractLearning<D extends DataStructureFactory> implements
50 LearningStrategy<D> {
51
52 /**
53 *
54 */
55 private static final long serialVersionUID = 1L;
56
57 private VarActivityListener val;
58
59 public void setVarActivityListener(VarActivityListener s) {
60 this.val = s;
61 }
62
63 public void setSolver(Solver<D> s) {
64 this.val = s;
65 }
66
67 public final void claBumpActivity(Constr reason) {
68 for (int i = 0; i < reason.size(); i++) {
69 int q = reason.get(i);
70 assert q > 1;
71 this.val.varBumpActivity(q);
72 }
73 }
74
75 public void init() {
76 }
77
78 }