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