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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.tools;
31  
32  import org.sat4j.specs.ISolver;
33  import org.sat4j.specs.IVecInt;
34  import org.sat4j.specs.TimeoutException;
35  
36  /**
37   * This class allow to use the ModelIterator class as a solver.
38   * 
39   * @author lonca
40   */
41  public class ModelIteratorToSATAdapter extends ModelIterator {
42  
43      /**
44       * 
45       */
46      private static final long serialVersionUID = 1L;
47      private int[] lastModel = null;
48      private final SolutionFoundListener sfl;
49  
50      public ModelIteratorToSATAdapter(ISolver solver, SolutionFoundListener sfl) {
51          this(solver, Long.MAX_VALUE, sfl);
52      }
53  
54      public ModelIteratorToSATAdapter(ISolver solver, long bound,
55              SolutionFoundListener sfl) {
56          super(solver, bound);
57          this.sfl = sfl;
58      }
59  
60      @Override
61      public boolean isSatisfiable() throws TimeoutException {
62          boolean isSat = false;
63          while (super.isSatisfiable()) {
64              isSat = true;
65              lastModel = super.model();
66              this.sfl.onSolutionFound(lastModel);
67          }
68          return isSat;
69      }
70  
71      @Override
72      public boolean isSatisfiable(IVecInt assumps) throws TimeoutException {
73          boolean isSat = false;
74          while (super.isSatisfiable(assumps)) {
75              isSat = true;
76              lastModel = super.model();
77              this.sfl.onSolutionFound(lastModel);
78          }
79          return isSat;
80      }
81  
82      @Override
83      public int[] model() {
84          return this.lastModel;
85      }
86  
87  }