View Javadoc

1   /*******************************************************************************
2    * SAT4J: a SATisfiability library for Java Copyright (C) 2004, 2012 Artois University and CNRS
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   * Contributors:
28   *   CRIL - initial API and implementation
29   *******************************************************************************/
30  package org.sat4j.pb.constraints;
31  
32  import java.math.BigInteger;
33  
34  import org.sat4j.minisat.core.Constr;
35  import org.sat4j.pb.constraints.pb.IDataStructurePB;
36  import org.sat4j.pb.constraints.pb.MaxWatchPb;
37  import org.sat4j.pb.constraints.pb.WatchPb;
38  import org.sat4j.specs.ContradictionException;
39  
40  /**
41   * @author leberre To change the template for this generated type comment go to
42   *         Window - Preferences - Java - Code Generation - Code and Comments
43   */
44  public class PBMaxDataStructure extends AbstractPBDataStructureFactory {
45  
46      private static final long serialVersionUID = 1L;
47  
48      /**
49       * @param literals
50       * @param coefs
51       * @param moreThan
52       * @param degree
53       * @return a counter-based PB constraint.
54       * @throws ContradictionException
55       */
56      @Override
57      protected Constr constraintFactory(int[] literals, BigInteger[] coefs,
58              BigInteger degree) throws ContradictionException {
59          // return MaxWatchPb.maxWatchPbNew(solver, getVocabulary(), literals,
60          // coefs, moreThan, degree);
61          return MaxWatchPb.normalizedMaxWatchPbNew(this.solver, getVocabulary(),
62                  literals, coefs, degree,
63                  AbstractPBClauseCardConstrDataStructure
64                          .sumOfCoefficients(coefs));
65      }
66  
67      /**
68       * @param literals
69       * @param weightedLits
70       * @param degree
71       * @return a counter-based PB constraint.
72       */
73      @Override
74      protected WatchPb learntConstraintFactory(IDataStructurePB dspb) {
75          return MaxWatchPb.normalizedWatchPbNew(getVocabulary(), dspb);
76      }
77  
78  }