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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;
31  
32  import org.sat4j.core.ASolverFactory;
33  import org.sat4j.minisat.SolverFactory;
34  import org.sat4j.reader.InstanceReader;
35  import org.sat4j.reader.Reader;
36  import org.sat4j.specs.ISolver;
37  
38  /**
39   * Very simple launcher, to be used during the SAT competition or the SAT race
40   * for instance.
41   * 
42   * @author daniel
43   * 
44   */
45  public class BasicLauncher<T extends ISolver> extends AbstractLauncher {
46  
47      /**
48       * 
49       */
50      private static final long serialVersionUID = 1L;
51  
52      private final ASolverFactory<T> factory;
53  
54      public BasicLauncher(ASolverFactory<T> factory) {
55          this.factory = factory;
56      }
57  
58      /**
59       * Lance le prouveur sur un fichier Dimacs.
60       * 
61       * @param args
62       *            doit contenir le nom d'un fichier Dimacs, eventuellement
63       *            compress?.
64       */
65      public static void main(final String[] args) {
66          BasicLauncher<ISolver> lanceur = new BasicLauncher<ISolver>(
67                  SolverFactory.instance());
68          if (args.length == 0 || args.length > 2) {
69              lanceur.usage();
70              return;
71          }
72          lanceur.run(args);
73          System.exit(lanceur.getExitCode().value());
74      }
75  
76      @Override
77      protected ISolver configureSolver(String[] args) {
78          ISolver asolver;
79          if (args.length == 2) {
80              asolver = this.factory.createSolverByName(args[0]);
81          } else {
82              asolver = this.factory.defaultSolver();
83          }
84          asolver.setTimeout(Integer.MAX_VALUE);
85          asolver.setDBSimplificationAllowed(true);
86          getLogWriter().println(asolver.toString(COMMENT_PREFIX));
87          return asolver;
88      }
89  
90      @Override
91      protected Reader createReader(ISolver theSolver, String problemname) {
92          return new InstanceReader(theSolver);
93      }
94  
95      @Override
96      public void usage() {
97          log("java -jar org.sat4j.core.jar <cnffile>");
98      }
99  
100     @Override
101     protected String getInstanceName(String[] args) {
102         if (args.length == 0) {
103             return null;
104         }
105         return args[args.length - 1];
106     }
107 }