| ObjectValuePairComparator.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17 * SOFTWARE.
18 */
19
20 package com.liferay.portal.kernel.util;
21
22 import java.util.Comparator;
23
24 /**
25 * <a href="ObjectValuePairComparator.java.html"><b><i>View Source</i></b></a>
26 *
27 * @author Brian Wing Shun Chan
28 *
29 */
30 public class ObjectValuePairComparator<K, V>
31 implements Comparator<ObjectValuePair<K, V>> {
32
33 public ObjectValuePairComparator() {
34 this(true);
35 }
36
37 public ObjectValuePairComparator(boolean asc) {
38 this(true, asc);
39 }
40
41 public ObjectValuePairComparator(boolean byKey, boolean asc) {
42 _byKey = byKey;
43 _asc = asc;
44 }
45
46 public int compare(ObjectValuePair<K, V> ovp1, ObjectValuePair<K, V> ovp2) {
47 if (_byKey) {
48 Comparable key1 = (Comparable)ovp1.getKey();
49 Comparable key2 = (Comparable)ovp2.getKey();
50
51 if (_asc) {
52 return key1.compareTo(key2);
53 }
54 else {
55 return -(key1.compareTo(key2));
56 }
57 }
58 else {
59 Comparable value1 = (Comparable)ovp1.getValue();
60 Comparable value2 = (Comparable)ovp2.getValue();
61
62 if (_asc) {
63 return value1.compareTo(value2);
64 }
65 else {
66 return -(value1.compareTo(value2));
67 }
68 }
69 }
70
71 private boolean _byKey;
72 private boolean _asc;
73
74 }