001 /** 002 * Copyright 2005-2014 The Kuali Foundation 003 * 004 * Licensed under the Educational Community License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.opensource.org/licenses/ecl2.php 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 package org.kuali.rice.kns.web.comparator; 017 018 import java.io.Serializable; 019 import java.util.Comparator; 020 021 public class NullCellComparator implements Comparator, Serializable { 022 023 public int compare(Object o1, Object o2) { 024 if (o1 == null && o2 == null) { 025 return 0; 026 } 027 if (o1 == null) { 028 return -1; 029 } 030 else if (o2 == null) { 031 return 1; 032 } 033 else { 034 // probably won't go into this code segment, but doing it just in case 035 return CellComparatorHelper.getAppropriateComparatorForPropertyClass(o1.getClass()).compare(o1, o2); 036 } 037 } 038 039 }