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.minisat.core.Constr;
33 import org.sat4j.pb.constraints.pb.IDataStructurePB;
34 import org.sat4j.pb.constraints.pb.MaxWatchPb;
35 import org.sat4j.pb.constraints.pb.WatchPb;
36 import org.sat4j.specs.ContradictionException;
37
38 /**
39 * @author leberre To change the template for this generated type comment go to
40 * Window - Preferences - Java - Code Generation - Code and Comments
41 */
42 public class PBMaxDataStructure extends AbstractPBDataStructureFactory {
43
44 private static final long serialVersionUID = 1L;
45
46 /**
47 * @param literals
48 * @param coefs
49 * @param moreThan
50 * @param degree
51 * @return a counter-based PB constraint.
52 * @throws ContradictionException
53 */
54 @Override
55 protected Constr constraintFactory(int[] literals, BigInteger[] coefs,
56 BigInteger degree) throws ContradictionException {
57 // return MaxWatchPb.maxWatchPbNew(solver, getVocabulary(), literals,
58 // coefs, moreThan, degree);
59 return MaxWatchPb.normalizedMaxWatchPbNew(solver, getVocabulary(),
60 literals, coefs, degree);
61 }
62
63 /**
64 * @param literals
65 * @param weightedLits
66 * @param degree
67 * @return a counter-based PB constraint.
68 */
69 @Override
70 protected WatchPb learntConstraintFactory(IDataStructurePB dspb) {
71 return MaxWatchPb.normalizedWatchPbNew(getVocabulary(), dspb);
72 }
73
74 }