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.reader;
31
32 import org.sat4j.pb.IPBSolver;
33 import org.sat4j.reader.InstanceReader;
34 import org.sat4j.reader.Reader;
35
36 /**
37 * An reader having the responsibility to choose the right reader according to
38 * the input.
39 *
40 * @author leberre
41 */
42 public class PBInstanceReader extends InstanceReader {
43
44 private OPBReader2012 opb;
45
46 private final IPBSolver solver;
47
48 public PBInstanceReader(IPBSolver solver) {
49 super(solver);
50 this.solver = solver;
51 }
52
53 private Reader getDefaultOPBReader() {
54 if (this.opb == null) {
55 this.opb = new OPBReader2012(this.solver);
56 }
57 return this.opb;
58 }
59
60 public boolean hasObjectiveFunction() {
61 return this.opb.hasObjFunc;
62 }
63
64 @Override
65 protected Reader handleFileName(String fname, String prefix) {
66 if (fname.endsWith(".opb") || "PB".equals(prefix)) {
67 return getDefaultOPBReader();
68 }
69 return super.handleFileName(fname, prefix);
70 }
71 }