01: /**
02: * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
03: *
04: * Permission is hereby granted, free of charge, to any person obtaining a copy
05: * of this software and associated documentation files (the "Software"), to deal
06: * in the Software without restriction, including without limitation the rights
07: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
08: * copies of the Software, and to permit persons to whom the Software is
09: * furnished to do so, subject to the following conditions:
10: *
11: * The above copyright notice and this permission notice shall be included in
12: * all copies or substantial portions of the Software.
13: *
14: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17: * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20: * SOFTWARE.
21: */package com.liferay.portal.kernel.util;
22:
23: import java.io.Serializable;
24:
25: import java.util.Comparator;
26:
27: /**
28: * <a href="StringComparator.java.html"><b><i>View Source</i></b></a>
29: *
30: * @author Brian Wing Shun Chan
31: *
32: */
33: public class StringComparator implements Comparator, Serializable {
34:
35: public StringComparator() {
36: this (true, false);
37: }
38:
39: public StringComparator(boolean asc, boolean caseSensitive) {
40: _asc = asc;
41: _caseSensitive = caseSensitive;
42: }
43:
44: public int compare(Object obj1, Object obj2) {
45: String s1 = (String) obj1;
46: String s2 = (String) obj2;
47:
48: if (s1 == null) {
49: s1 = StringPool.BLANK;
50: }
51:
52: if (s2 == null) {
53: s2 = StringPool.BLANK;
54: }
55:
56: if (!_asc) {
57: String temp = s1;
58:
59: s1 = s2;
60: s2 = temp;
61: }
62:
63: if (_caseSensitive) {
64: return s1.compareTo(s2);
65: } else {
66: return s1.compareToIgnoreCase(s2);
67: }
68: }
69:
70: private boolean _asc;
71: private boolean _caseSensitive;
72:
73: }
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