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.util;
22:
23: import java.lang.reflect.InvocationTargetException;
24:
25: import java.util.Comparator;
26:
27: import org.apache.commons.beanutils.PropertyUtils;
28: import org.apache.commons.logging.Log;
29: import org.apache.commons.logging.LogFactory;
30:
31: /**
32: * <a href="PropertyComparator.java.html"><b><i>View Source</i></b></a>
33: *
34: * @author Patrick Brady
35: *
36: */
37: public class PropertyComparator implements Comparator {
38:
39: public PropertyComparator(String propertyName) {
40: _propertyNames = new String[] { propertyName };
41: }
42:
43: public PropertyComparator(String[] propertyNames) {
44: _propertyNames = propertyNames;
45: }
46:
47: public int compare(Object obj1, Object obj2) {
48: try {
49: for (int i = 0; i < _propertyNames.length; i++) {
50: String propertyName = _propertyNames[i];
51:
52: Object property1 = PropertyUtils.getProperty(obj1,
53: propertyName);
54: Object property2 = PropertyUtils.getProperty(obj2,
55: propertyName);
56:
57: if (property1 instanceof String) {
58: int result = property1.toString()
59: .compareToIgnoreCase(property2.toString());
60:
61: if (result != 0) {
62: return result;
63: }
64: }
65:
66: if (property1 instanceof Comparable) {
67: int result = ((Comparable) property1)
68: .compareTo(property2);
69:
70: if (result != 0) {
71: return result;
72: }
73: }
74: }
75: } catch (IllegalAccessException iae) {
76: _log.error(iae.getMessage());
77: } catch (InvocationTargetException ite) {
78: _log.error(ite.getMessage());
79: } catch (NoSuchMethodException nsme) {
80: _log.error(nsme.getMessage());
81: }
82:
83: return -1;
84: }
85:
86: private static Log _log = LogFactory
87: .getLog(PropertyComparator.class);
88:
89: private String[] _propertyNames;
90:
91: }
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