01: /*
02: * File : $Source: /usr/local/cvs/opencms/src/org/opencms/i18n/CmsLocaleComparator.java,v $
03: * Date : $Date: 2008-02-27 12:05:47 $
04: * Version: $Revision: 1.10 $
05: *
06: * This library is part of OpenCms -
07: * the Open Source Content Management System
08: *
09: * Copyright (c) 2002 - 2008 Alkacon Software GmbH (http://www.alkacon.com)
10: *
11: * This library is free software; you can redistribute it and/or
12: * modify it under the terms of the GNU Lesser General Public
13: * License as published by the Free Software Foundation; either
14: * version 2.1 of the License, or (at your option) any later version.
15: *
16: * This library is distributed in the hope that it will be useful,
17: * but WITHOUT ANY WARRANTY; without even the implied warranty of
18: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19: * Lesser General Public License for more details.
20: *
21: * For further information about Alkacon Software GmbH, please see the
22: * company website: http://www.alkacon.com
23: *
24: * For further information about OpenCms, please see the
25: * project website: http://www.opencms.org
26: *
27: * You should have received a copy of the GNU Lesser General Public
28: * License along with this library; if not, write to the Free Software
29: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30: */
31:
32: package org.opencms.i18n;
33:
34: import java.io.Serializable;
35: import java.util.Comparator;
36: import java.util.Locale;
37:
38: /**
39: * Simple comparator implementation for locales, that compares the String value of the locales.<p>
40: *
41: * @author Alexander Kandzior
42: *
43: * @version $Revision: 1.10 $
44: *
45: * @since 6.0.0
46: */
47: public final class CmsLocaleComparator implements Serializable,
48: Comparator {
49:
50: /** Serial version UID required for safe serialization. */
51: private static final long serialVersionUID = -690619562147670465L;
52:
53: /** Static locale comparator. */
54: private static final Comparator LOCALE_COMPARATOR = new CmsLocaleComparator();
55:
56: /**
57: * Hides the public constructor.<p>
58: */
59: private CmsLocaleComparator() {
60:
61: // noop
62: }
63:
64: /**
65: * Returns a static instance of the locale comparator.<p>
66: *
67: * @return a static instance of the locale comparator
68: */
69: public static Comparator getComparator() {
70:
71: return LOCALE_COMPARATOR;
72: }
73:
74: /**
75: * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
76: */
77: public int compare(Object o1, Object o2) {
78:
79: if ((o1 instanceof Locale) && (o2 instanceof Locale)) {
80: return o1.toString().compareTo(o2.toString());
81: }
82: return 0;
83: }
84: }
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