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 pseudo boolean algorithms described in:
20 * A fast pseudo-Boolean constraint solver Chai, D.; Kuehlmann, A.
21 * Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
22 * Volume 24, Issue 3, March 2005 Page(s): 305 - 317
23 *
24 * and
25 * Heidi E. Dixon, 2004. Automating Pseudo-Boolean Inference within a DPLL
26 * Framework. Ph.D. Dissertation, University of Oregon.
27 *******************************************************************************/
28 package org.sat4j.pb.constraints;
29
30 import java.math.BigInteger;
31
32 import org.sat4j.pb.constraints.pb.IDataStructurePB;
33 import org.sat4j.pb.constraints.pb.MaxWatchPb;
34 import org.sat4j.pb.constraints.pb.WatchPb;
35 import org.sat4j.specs.ContradictionException;
36 import org.sat4j.specs.IVec;
37 import org.sat4j.specs.IVecInt;
38
39 /**
40 * @author leberre To change the template for this generated type comment go to
41 * Window - Preferences - Java - Code Generation - Code and Comments
42 */
43 public class PBMaxDataStructure extends AbstractPBDataStructureFactory {
44
45 private static final long serialVersionUID = 1L;
46
47 /**
48 * @param literals
49 * @param coefs
50 * @param moreThan
51 * @param degree
52 * @return a counter-based PB constraint.
53 * @throws ContradictionException
54 */
55 @Override
56 protected WatchPb constraintFactory(IVecInt literals, IVecInt coefs,
57 boolean moreThan, int degree) throws ContradictionException {
58 return MaxWatchPb.maxWatchPbNew(solver, getVocabulary(), literals,
59 coefs, moreThan, degree);
60 }
61
62 /**
63 * @param literals
64 * @param coefs
65 * @param degree
66 * @return a counter-based PB constraint.
67 */
68 @Override
69 protected WatchPb constraintFactory(IVecInt literals, IVecInt coefs,
70 int degree) {
71 return MaxWatchPb.watchPbNew(getVocabulary(), literals, coefs, true,
72 degree);
73 }
74
75 /**
76 * @param literals
77 * @param coefs
78 * @param moreThan
79 * @param degree
80 * @return a counter-based PB constraint.
81 * @throws ContradictionException
82 */
83 @Override
84 protected WatchPb constraintFactory(IVecInt literals,
85 IVec<BigInteger> coefs, boolean moreThan, BigInteger degree)
86 throws ContradictionException {
87 return MaxWatchPb.maxWatchPbNew(solver, getVocabulary(), literals,
88 coefs, moreThan, degree);
89 }
90
91 /**
92 * @param literals
93 * @param coefs
94 * @param degree
95 * @return a counter-based PB constraint.
96 */
97 @Override
98 protected WatchPb constraintFactory(IVecInt literals,
99 IVec<BigInteger> coefs, BigInteger degree) {
100 return MaxWatchPb.watchPbNew(getVocabulary(), literals, coefs, true,
101 degree);
102 }
103
104 /**
105 * @param literals
106 * @param weightedLits
107 * @param degree
108 * @return a counter-based PB constraint.
109 */
110 @Override
111 protected WatchPb constraintFactory(IDataStructurePB dspb) {
112 return MaxWatchPb.normalizedWatchPbNew(getVocabulary(),dspb);
113 }
114
115
116 }