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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.minisat.constraints;
31  
32  import java.io.Serializable;
33  
34  import org.sat4j.core.Vec;
35  import org.sat4j.minisat.core.Constr;
36  import org.sat4j.minisat.core.DataStructureFactory;
37  import org.sat4j.minisat.core.ILits;
38  import org.sat4j.minisat.core.Learner;
39  import org.sat4j.minisat.core.Propagatable;
40  import org.sat4j.minisat.core.UnitPropagationListener;
41  import org.sat4j.specs.ContradictionException;
42  import org.sat4j.specs.IVec;
43  import org.sat4j.specs.IVecInt;
44  
45  /**
46   * @author leberre To change the template for this generated type comment go to
47   *         Window>Preferences>Java>Code Generation>Code and Comments
48   */
49  public abstract class AbstractDataStructureFactory implements
50          DataStructureFactory, Serializable {
51  
52      /**
53  	 * 
54  	 */
55      private static final long serialVersionUID = 1L;
56  
57      /*
58       * (non-Javadoc)
59       * 
60       * @see
61       * org.sat4j.minisat.core.DataStructureFactory#conflictDetectedInWatchesFor
62       * (int)
63       */
64      public void conflictDetectedInWatchesFor(int p, int i) {
65          for (int j = i + 1; j < this.tmp.size(); j++) {
66              this.lits.watch(p, this.tmp.get(j));
67          }
68      }
69  
70      /*
71       * (non-Javadoc)
72       * 
73       * @see org.sat4j.minisat.core.DataStructureFactory#getWatchesFor(int)
74       */
75      public IVec<Propagatable> getWatchesFor(int p) {
76          this.tmp.clear();
77          this.lits.watches(p).moveTo(this.tmp);
78          return this.tmp;
79      }
80  
81      protected ILits lits;
82  
83      protected AbstractDataStructureFactory() {
84          this.lits = createLits();
85      }
86  
87      protected abstract ILits createLits();
88  
89      private final IVec<Propagatable> tmp = new Vec<Propagatable>();
90  
91      /*
92       * (non-Javadoc)
93       * 
94       * @see org.sat4j.minisat.DataStructureFactory#createVocabulary()
95       */
96      public ILits getVocabulary() {
97          return this.lits;
98      }
99  
100     protected UnitPropagationListener solver;
101 
102     protected Learner learner;
103 
104     public void setUnitPropagationListener(UnitPropagationListener s) {
105         this.solver = s;
106     }
107 
108     public void setLearner(Learner learner) {
109         this.learner = learner;
110     }
111 
112     public void reset() {
113     }
114 
115     public void learnConstraint(Constr constr) {
116         this.learner.learn(constr);
117     }
118 
119     /*
120      * (non-Javadoc)
121      * 
122      * @see
123      * org.sat4j.minisat.core.DataStructureFactory#createCardinalityConstraint
124      * (org.sat4j.specs.VecInt, int)
125      */
126     public Constr createCardinalityConstraint(IVecInt literals, int degree)
127             throws ContradictionException {
128         throw new UnsupportedOperationException();
129     }
130 }