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.constraints;
31
32 import java.io.Serializable;
33
34 import org.sat4j.core.Vec;
35 import org.sat4j.minisat.core.Constr;
36 import org.sat4j.minisat.core.DataStructureFactory;
37 import org.sat4j.minisat.core.ILits;
38 import org.sat4j.minisat.core.Learner;
39 import org.sat4j.minisat.core.Propagatable;
40 import org.sat4j.minisat.core.UnitPropagationListener;
41 import org.sat4j.specs.ContradictionException;
42 import org.sat4j.specs.IVec;
43 import org.sat4j.specs.IVecInt;
44
45 /**
46 * @author leberre To change the template for this generated type comment go to
47 * Window>Preferences>Java>Code Generation>Code and Comments
48 */
49 public abstract class AbstractDataStructureFactory implements
50 DataStructureFactory, Serializable {
51
52 /**
53 *
54 */
55 private static final long serialVersionUID = 1L;
56
57 /*
58 * (non-Javadoc)
59 *
60 * @see
61 * org.sat4j.minisat.core.DataStructureFactory#conflictDetectedInWatchesFor
62 * (int)
63 */
64 public void conflictDetectedInWatchesFor(int p, int i) {
65 for (int j = i + 1; j < this.tmp.size(); j++) {
66 this.lits.watch(p, this.tmp.get(j));
67 }
68 }
69
70 /*
71 * (non-Javadoc)
72 *
73 * @see org.sat4j.minisat.core.DataStructureFactory#getWatchesFor(int)
74 */
75 public IVec<Propagatable> getWatchesFor(int p) {
76 this.tmp.clear();
77 this.lits.watches(p).moveTo(this.tmp);
78 return this.tmp;
79 }
80
81 protected ILits lits;
82
83 protected AbstractDataStructureFactory() {
84 this.lits = createLits();
85 }
86
87 protected abstract ILits createLits();
88
89 private final IVec<Propagatable> tmp = new Vec<Propagatable>();
90
91 /*
92 * (non-Javadoc)
93 *
94 * @see org.sat4j.minisat.DataStructureFactory#createVocabulary()
95 */
96 public ILits getVocabulary() {
97 return this.lits;
98 }
99
100 protected UnitPropagationListener solver;
101
102 protected Learner learner;
103
104 public void setUnitPropagationListener(UnitPropagationListener s) {
105 this.solver = s;
106 }
107
108 public void setLearner(Learner learner) {
109 this.learner = learner;
110 }
111
112 public void reset() {
113 }
114
115 public void learnConstraint(Constr constr) {
116 this.learner.learn(constr);
117 }
118
119 /*
120 * (non-Javadoc)
121 *
122 * @see
123 * org.sat4j.minisat.core.DataStructureFactory#createCardinalityConstraint
124 * (org.sat4j.specs.VecInt, int)
125 */
126 public Constr createCardinalityConstraint(IVecInt literals, int degree)
127 throws ContradictionException {
128 throw new UnsupportedOperationException();
129 }
130 }