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.constraints;
29
30 import org.sat4j.minisat.constraints.AbstractDataStructureFactory;
31 import org.sat4j.minisat.constraints.cnf.CBClause;
32 import org.sat4j.minisat.constraints.cnf.Clauses;
33 import org.sat4j.minisat.constraints.cnf.Lits;
34 import org.sat4j.minisat.core.Constr;
35 import org.sat4j.minisat.core.ILits;
36 import org.sat4j.minisat.core.Propagatable;
37 import org.sat4j.specs.ContradictionException;
38 import org.sat4j.specs.IVec;
39 import org.sat4j.specs.IVecInt;
40
41 /**
42 * @author parrain To change the template for this generated type comment go to
43 * Window - Preferences - Java - Code Generation - Code and Comments
44 */
45 public class ClausalDataStructureCB extends AbstractDataStructureFactory<ILits> {
46
47 private static final long serialVersionUID = 1L;
48
49 /*
50 * (non-Javadoc)
51 *
52 * @see
53 * org.sat4j.minisat.core.DataStructureFactory#conflictDetectedInWatchesFor
54 * (int, int)
55 */
56 @Override
57 public void conflictDetectedInAttachesFor(int p, int i) {
58 // to nothing
59 }
60
61 /*
62 * (non-Javadoc)
63 *
64 * @see org.sat4j.minisat.core.DataStructureFactory#getWatchesFor(int)
65 */
66 @Override
67 public IVec<Propagatable> getAttachesFor(int p) {
68 return getVocabulary().attaches(p);
69 }
70
71 /*
72 * (non-Javadoc)
73 *
74 * @see
75 * org.sat4j.minisat.core.DataStructureFactory#createClause(org.sat4j.specs
76 * .VecInt)
77 */
78 public Constr createClause(IVecInt literals) throws ContradictionException {
79 IVecInt v = Clauses.sanityCheck(literals, getVocabulary(), solver);
80 if (v == null)
81 return null;
82 return CBClause.brandNewClause(solver, getVocabulary(), v);
83 }
84
85 /*
86 * (non-Javadoc)
87 *
88 * @see
89 * org.sat4j.minisat.core.DataStructureFactory#createUnregisteredClause(
90 * org.sat4j.specs.VecInt)
91 */
92 public Constr createUnregisteredClause(IVecInt literals) {
93 return new CBClause(literals, getVocabulary());
94 }
95
96 @Override
97 protected ILits createLits() {
98 return new Lits();
99 }
100
101 }