1 /*******************************************************************************
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
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 pseudo boolean algorithms described in:
20 * A fast pseudo-Boolean constraint solver Chai, D.; Kuehlmann, A.
21 * Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
22 * Volume 24, Issue 3, March 2005 Page(s): 305 - 317
23 *
24 * and
25 * Heidi E. Dixon, 2004. Automating Pseudo-Boolean Inference within a DPLL
26 * Framework. Ph.D. Dissertation, University of Oregon.
27 *******************************************************************************/
28 package org.sat4j.pb.reader;
29
30 import java.io.IOException;
31
32 import org.sat4j.pb.IPBSolver;
33 import org.sat4j.reader.ParseFormatException;
34 import org.sat4j.specs.ContradictionException;
35
36 /**
37 * Reader complying to the PB06 input format.
38 *
39 * @author leberre
40 *
41 */
42 public class OPBReader2006 extends OPBReader2005 {
43
44 /**
45 *
46 */
47 private static final long serialVersionUID = 1L;
48
49 public OPBReader2006(IPBSolver solver) {
50 super(solver);
51 }
52
53 /**
54 * read a term into coeff and var
55 *
56 * @param coeff
57 * the coefficient of the variable
58 * @param var
59 * the indentifier we read
60 * @throws IOException
61 * @throws ParseException
62 */
63 @Override
64 protected void readTerm(StringBuffer coeff, StringBuffer var)
65 throws IOException, ParseFormatException, ContradictionException {
66 readInteger(coeff);
67
68 skipSpaces();
69
70 if (!readIdentifier(var))
71 throw new ParseFormatException("identifier expected");
72 }
73 }