1 /*
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2006 Daniel Le Berre
3 *
4 * Based on the original minisat specification from:
5 *
6 * An extensible SAT solver. Niklas E?n and Niklas S?rensson. Proceedings of the
7 * Sixth International Conference on Theory and Applications of Satisfiability
8 * Testing, LNCS 2919, pp 502-518, 2003.
9 *
10 * This library is free software; you can redistribute it and/or modify it under
11 * the terms of the GNU Lesser General Public License as published by the Free
12 * Software Foundation; either version 2.1 of the License, or (at your option)
13 * any later version.
14 *
15 * This library is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
18 * details.
19 *
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25 package org.sat4j.reader.csp;
26
27 import java.util.Iterator;
28 import java.util.NoSuchElementException;
29
30 public class SingletonDomain implements Domain {
31
32 private final int value;
33
34 public SingletonDomain(int v) {
35 value = v;
36 }
37
38 public int get(int i) {
39 if (i != 0) {
40 throw new IllegalArgumentException();
41 }
42 return value;
43 }
44
45 public int size() {
46 return 1;
47 }
48
49 public Iterator<Integer> iterator() {
50 return new Iterator<Integer>() {
51 private int i = 0;
52
53 public boolean hasNext() {
54 return i < 1;
55 }
56
57 public Integer next() {
58 if (i == 1)
59 throw new NoSuchElementException();
60 return value;
61 }
62
63 public void remove() {
64 throw new UnsupportedOperationException();
65 }
66 };
67 }
68
69 public int pos(int value) {
70 if (value != this.value) {
71 throw new IllegalArgumentException();
72 }
73 return 0;
74 }
75
76 }