1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2008 Tim Pizey
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * Tim Pizey <timp At paneris.org>
42 * http://paneris.org/~timp
43 */
44
45 package org.melati.poem;
46
47 import java.util.Enumeration;
48 import java.util.NoSuchElementException;
49
50 /**
51 * The possible raw values of a {@link BooleanPoemType}.
52 * @author timp
53 * @since 18 April 2008
54 *
55 */
56 public
57 class BooleanPossibleRawEnumeration implements Enumeration<Boolean> {
58 private int state = 0;
59
60 /**
61 * {@inheritDoc}
62 * @see java.util.Enumeration#hasMoreElements()
63 */
64 public boolean hasMoreElements() {
65 return state < 2;
66 }
67
68 /**
69 * {@inheritDoc}
70 * @see java.util.Enumeration#nextElement()
71 */
72 public synchronized Boolean nextElement() {
73 if (state == 2)
74 throw new NoSuchElementException();
75 else
76 // Perfectly good, but the only usage I have ever seen.
77 // return state++ == 0 ? Boolean.FALSE : Boolean.TRUE;
78 return ++state == 1 ? Boolean.FALSE : Boolean.TRUE;
79 }
80
81 }