1 /*
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2006 Daniel Le Berre
3 *
4 * Based on the original minisat specification from:
5 *
6 * An extensible SAT solver. Niklas E?n and Niklas S?rensson. Proceedings of the
7 * Sixth International Conference on Theory and Applications of Satisfiability
8 * Testing, LNCS 2919, pp 502-518, 2003.
9 *
10 * This library is free software; you can redistribute it and/or modify it under
11 * the terms of the GNU Lesser General Public License as published by the Free
12 * Software Foundation; either version 2.1 of the License, or (at your option)
13 * any later version.
14 *
15 * This library is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
18 * details.
19 *
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26 package org.sat4j.minisat.constraints;
27
28 import java.io.Serializable;
29 import java.math.BigInteger;
30
31 import org.sat4j.core.Vec;
32 import org.sat4j.minisat.core.Constr;
33 import org.sat4j.minisat.core.DataStructureFactory;
34 import org.sat4j.minisat.core.ILits;
35 import org.sat4j.minisat.core.Learner;
36 import org.sat4j.minisat.core.Propagatable;
37 import org.sat4j.minisat.core.UnitPropagationListener;
38 import org.sat4j.specs.ContradictionException;
39 import org.sat4j.specs.IVec;
40 import org.sat4j.specs.IVecInt;
41
42 /**
43 * @author leberre To change the template for this generated type comment go to
44 * Window>Preferences>Java>Code Generation>Code and Comments
45 */
46 public abstract class AbstractDataStructureFactory<L extends ILits> implements
47 DataStructureFactory<L>, Serializable {
48
49 /*
50 * (non-Javadoc)
51 *
52 * @see org.sat4j.minisat.core.DataStructureFactory#conflictDetectedInWatchesFor(int)
53 */
54 public void conflictDetectedInWatchesFor(int p, int i) {
55 for (int j = i + 1; j < tmp.size(); j++) {
56 lits.watch(p, tmp.get(j));
57 }
58 }
59
60 /*
61 * (non-Javadoc)
62 *
63 * @see org.sat4j.minisat.core.DataStructureFactory#getWatchesFor(int)
64 */
65 public IVec<Propagatable> getWatchesFor(int p) {
66 tmp.clear();
67 lits.watches(p).moveTo(tmp);
68 return tmp;
69 }
70
71 protected L lits;
72
73 protected AbstractDataStructureFactory() {
74 lits = createLits();
75 }
76
77 protected abstract L createLits();
78
79 private final IVec<Propagatable> tmp = new Vec<Propagatable>();
80
81 /*
82 * (non-Javadoc)
83 *
84 * @see org.sat4j.minisat.DataStructureFactory#createVocabulary()
85 */
86 public L getVocabulary() {
87 return lits;
88 }
89
90 protected UnitPropagationListener solver;
91
92 protected Learner learner;
93
94 public void setUnitPropagationListener(UnitPropagationListener s) {
95 solver = s;
96 }
97
98 public void setLearner(Learner learner) {
99 this.learner = learner;
100 }
101
102 public void reset() {
103 }
104
105 public void learnConstraint(Constr constr) {
106 learner.learn(constr);
107 }
108
109 /*
110 * (non-Javadoc)
111 *
112 * @see org.sat4j.minisat.core.DataStructureFactory#createCardinalityConstraint(org.sat4j.specs.VecInt,
113 * int)
114 */
115 public Constr createCardinalityConstraint(IVecInt literals, int degree)
116 throws ContradictionException {
117 throw new UnsupportedOperationException();
118 }
119
120 /*
121 * (non-Javadoc)
122 *
123 * @see org.sat4j.minisat.DataStructureFactory#createPseudoBooleanConstraint(org.sat4j.datatype.VecInt,
124 * org.sat4j.datatype.VecInt, int)
125 */
126 public Constr createPseudoBooleanConstraint(IVecInt literals,
127 IVec<BigInteger> coefs, boolean moreThan, BigInteger degree)
128 throws ContradictionException {
129 throw new UnsupportedOperationException();
130 }
131
132 public Constr createUnregisteredPseudoBooleanConstraint(IVecInt literals,
133 IVec<BigInteger> coefs, BigInteger degree) {
134 throw new UnsupportedOperationException();
135 }
136
137 }