01: /**
02: * Copyright 2006 Webmedia Group Ltd.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: **/package org.araneaframework.uilib.list.util.comparator;
16:
17: import java.io.Serializable;
18: import java.util.Comparator;
19:
20: /**
21: * Not-null comparator that compares <code>Comparable</code> objects by their
22: * own (@see java.lang.Comparable#compareTo(java.lang.Object)) method.
23: */
24: public class ComparableComparator implements Comparator, Serializable {
25: public static final ComparableComparator INSTANCE = new ComparableComparator();
26:
27: private ComparableComparator() {
28: }
29:
30: public int compare(Object o1, Object o2) {
31: return ((Comparable) o1).compareTo(o2);
32: }
33:
34: public boolean equals(Object obj) {
35: return ComparableComparator.class.equals(obj.getClass());
36: }
37:
38: public int hashCode() {
39: return 703271500;
40: }
41: }
|