01: /*
02: * Copyright 2007 The Kuali Foundation.
03: *
04: * Licensed under the Educational Community License, Version 1.0 (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.opensource.org/licenses/ecl1.php
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: */
16: package org.kuali.core.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: } else if (o2 == null) {
30: return 1;
31: } else {
32: // probably won't go into this code segment, but doing it just in case
33: return CellComparatorHelper
34: .getAppropriateComparatorForPropertyClass(
35: o1.getClass()).compare(o1, o2);
36: }
37: }
38:
39: }
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