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 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 *******************************************************************************/
28 package org.sat4j.minisat.constraints.cnf;
29
30 import org.sat4j.minisat.core.Constr;
31 import org.sat4j.minisat.core.UnitPropagationListener;
32 import org.sat4j.specs.IVecInt;
33
34 public class UnitClause implements Constr {
35
36 protected final int literal;
37
38 public UnitClause(int value) {
39 literal = value;
40 }
41
42 public void assertConstraint(UnitPropagationListener s) {
43 s.enqueue(literal, this);
44 }
45
46 public void calcReason(int p, IVecInt outReason) {
47 throw new UnsupportedOperationException();
48
49 }
50
51 public double getActivity() {
52 throw new UnsupportedOperationException();
53 }
54
55 public void incActivity(double claInc) {
56 throw new UnsupportedOperationException();
57 }
58
59 public boolean locked() {
60 throw new UnsupportedOperationException();
61 }
62
63 public void register() {
64 throw new UnsupportedOperationException();
65 }
66
67 public void remove() {
68 throw new UnsupportedOperationException();
69 }
70
71 public void rescaleBy(double d) {
72 throw new UnsupportedOperationException();
73 }
74
75 public void setLearnt() {
76 throw new UnsupportedOperationException();
77 }
78
79 public boolean simplify() {
80 throw new UnsupportedOperationException();
81 }
82
83 public boolean propagate(UnitPropagationListener s, int p) {
84 throw new UnsupportedOperationException();
85 }
86
87 public int get(int i) {
88 if (i>0) throw new IllegalArgumentException();
89 return literal;
90 }
91
92 public boolean learnt() {
93 throw new UnsupportedOperationException();
94 }
95
96 public int size() {
97 return 1;
98 }
99 }