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 package org.sat4j.csp;
20
21 import java.util.NoSuchElementException;
22
23 import org.sat4j.specs.IteratorInt;
24
25 public class RangeDomain implements Domain {
26
27 private final int begin;
28
29 private final int end;
30
31 private final int size;
32
33 public RangeDomain(int begin, int end) {
34 this.begin = begin;
35 this.end = end;
36 size = end - begin + 1;
37 }
38
39 public int get(int i) {
40 assert i >= 0;
41 return begin + i;
42 }
43
44 public int size() {
45 return size;
46 }
47
48 public IteratorInt iterator() {
49 return new IteratorInt() {
50 private int i = begin;
51
52 public boolean hasNext() {
53 return i <= end;
54 }
55
56 public int next() {
57 if (i > end)
58 throw new NoSuchElementException();
59 return i++;
60 }
61 };
62 }
63
64 public int pos(int value) {
65 return value - begin;
66 }
67
68 }