1 /*
2 * Copyright 2004-2008 the Seasar Foundation and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.seasar.uruma.viewer;
17
18 import java.io.Serializable;
19 import java.util.Comparator;
20
21 import org.seasar.framework.util.StringUtil;
22
23 /**
24 * 文字列と数値による比較を行う {@link Comparator} です。<br />
25 *
26 * @author y-komori
27 */
28 public class StringAndNumberComparator implements Comparator<Object>,
29 Serializable {
30
31 private static final long serialVersionUID = 12087223297593031L;
32
33 /*
34 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
35 */
36 public int compare(final Object o1, final Object o2) {
37 if ((o1 instanceof String) && (o2 instanceof String)) {
38 String s1 = (String) o1;
39 String s2 = (String) o2;
40 if (StringUtil.isNumber(s1) && StringUtil.isNumber(s2)) {
41 return Long.valueOf(s1).compareTo(Long.valueOf(s2));
42 } else {
43 return s1.compareTo(s2);
44 }
45 } else {
46 return 0;
47 }
48 }
49 }