1 package org.displaytag.test;
2
3 import java.util.Comparator;
4
5 import org.apache.commons.beanutils.ConvertUtils;
6
7
8 /**
9 * Sorts 2 numbers, converted from objects using beanutils Converters.
10 * @author rapruitt
11 * @author Fabrizio Giustina
12 * @version $Revision$ ($Author$)
13 */
14 public class NumberComparator implements Comparator
15 {
16
17 /**
18 * @see Comparator#compare(Object, Object)
19 */
20 public int compare(Object obj1, Object obj2)
21 {
22 double dbl1 = 0;
23 if (obj1 instanceof Number)
24 {
25 dbl1 = ((Number) obj1).doubleValue();
26 }
27 else if (obj1 != null)
28 {
29 dbl1 = ((Number) ConvertUtils.convert(obj1.toString(), Number.class)).doubleValue();
30 }
31
32 double dbl2 = 0;
33 if (obj2 instanceof Number)
34 {
35 dbl2 = ((Number) obj2).doubleValue();
36 }
37 else if (obj1 != null)
38 {
39 dbl2 = ((Number) ConvertUtils.convert(obj2.toString(), Number.class)).doubleValue();
40 }
41
42 return new Double(dbl1).compareTo(new Double(dbl2));
43 }
44 }
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