1 /**
2 * Copyright 2005-2013 The Kuali Foundation
3 *
4 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.rice.kns.web.comparator;
17
18 import org.displaytag.model.Cell;
19
20 import java.io.Serializable;
21 import java.util.Comparator;
22
23 public class BooleanCellComparator implements Comparator, Serializable {
24
25 static final long serialVersionUID = 1525781435762831055L;
26
27 public int compare(Object o1, Object o2) {
28
29 // null guard. non-null value is greater. equal if both are null
30 if (null == o1 || null == o2) {
31
32 return null == o1 && null == o2 ? 0 : null == o1 ? -1 : 1;
33
34 }
35
36 String s1 = CellComparatorHelper.getSanitizedStaticValue((Cell) o1);
37 String s2 = CellComparatorHelper.getSanitizedStaticValue((Cell) o2);
38
39 int compared = 0;
40
41 Boolean b1 = Boolean.valueOf(s1);
42 Boolean b2 = Boolean.valueOf(s2);
43
44 if (!b1.equals(b2)) {
45 if (b1.equals(Boolean.FALSE)) {
46 compared = -1;
47 }
48 else {
49 compared = 1;
50 }
51 }
52
53 return compared;
54 }
55
56 }