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.pb.constraints;
29
30 import org.sat4j.minisat.core.Constr;
31 import org.sat4j.pb.constraints.pb.LearntBinaryClausePB;
32 import org.sat4j.pb.constraints.pb.LearntHTClausePB;
33 import org.sat4j.pb.constraints.pb.OriginalBinaryClausePB;
34 import org.sat4j.pb.constraints.pb.OriginalHTClausePB;
35 import org.sat4j.pb.constraints.pb.UnitClausePB;
36 import org.sat4j.specs.IVecInt;
37
38 public class CompetPBMaxMixedHTClauseCardConstrDataStructure extends
39 PBMaxClauseCardConstrDataStructure {
40
41 /**
42 *
43 */
44 private static final long serialVersionUID = 1L;
45
46 @Override
47 protected Constr constructClause(IVecInt v) {
48 if (v == null)
49 return null;
50 if (v.size() == 2) {
51 return OriginalBinaryClausePB.brandNewClause(solver,
52 getVocabulary(), v);
53 }
54 return OriginalHTClausePB.brandNewClause(solver, getVocabulary(), v);
55 }
56
57 @Override
58 protected Constr constructLearntClause(IVecInt resLits) {
59 if (resLits.size() == 1) {
60 return new UnitClausePB(resLits.last(), getVocabulary());
61 }
62 if (resLits.size() == 2) {
63 return new LearntBinaryClausePB(resLits, getVocabulary());
64 }
65 return new LearntHTClausePB(resLits, getVocabulary());
66 }
67
68 }