1 /**
2 * Copyright 2005-2012 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 java.io.Serializable;
19 import java.util.Comparator;
20
21 public class NullCellComparator implements Comparator, Serializable {
22
23 public int compare(Object o1, Object o2) {
24 if (o1 == null && o2 == null) {
25 return 0;
26 }
27 if (o1 == null) {
28 return -1;
29 }
30 else if (o2 == null) {
31 return 1;
32 }
33 else {
34 // probably won't go into this code segment, but doing it just in case
35 return CellComparatorHelper.getAppropriateComparatorForPropertyClass(o1.getClass()).compare(o1, o2);
36 }
37 }
38
39 }