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.tools;
31
32 import org.sat4j.core.Vec;
33 import org.sat4j.core.VecInt;
34 import org.sat4j.specs.ContradictionException;
35 import org.sat4j.specs.IConstr;
36 import org.sat4j.specs.IVec;
37 import org.sat4j.specs.IVecInt;
38 import org.sat4j.specs.IteratorInt;
39
40 public class DisjunctionRHS<T, C> {
41 private final IVecInt literals;
42 private final DependencyHelper<T, C> helper;
43
44 private final IVec<IConstr> toName = new Vec<IConstr>();
45
46 public DisjunctionRHS(DependencyHelper<T, C> helper, IVecInt literals) {
47 this.literals = literals;
48 this.helper = helper;
49 }
50
51 public ImplicationNamer<T, C> implies(T... things)
52 throws ContradictionException {
53 IVecInt clause = new VecInt();
54 for (T t : things) {
55 clause.push(this.helper.getIntValue(t));
56 }
57 int p;
58 IConstr constr;
59 for (IteratorInt it = this.literals.iterator(); it.hasNext();) {
60 p = it.next();
61 clause.push(p);
62 constr = this.helper.solver.addClause(clause);
63 if (constr == null) {
64 throw new IllegalStateException(
65 "Constraints are not supposed to be null when using the helper");
66 }
67 this.toName.push(constr);
68 clause.remove(p);
69 }
70 return new ImplicationNamer<T, C>(this.helper, this.toName);
71 }
72 }