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1   /*
2    * Copyright 2001-2008 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
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   */
17  
18  package org.apache.juddi.query.util;
19  
20  import java.io.Serializable;
21  import java.util.Comparator;
22  import org.uddi.api_v3.KeyedReferenceGroup;
23  
24  /**
25   * @author <a href="mailto:jfaath@apache.org">Jeff Faath</a>
26   */
27  public class KeyedRefGroupTModelComparator implements Comparator<KeyedReferenceGroup>, Serializable {
28      private static final long serialVersionUID = 1L;
29  
30  	public int compare(KeyedReferenceGroup krg1, KeyedReferenceGroup krg2) {
31  		if (krg1 == null && krg2 == null)
32  			return 0;
33  		if (krg1 == null)
34  			return -1;
35  		if (krg2 == null)
36  			return 1;
37  		
38  		if (krg1.getTModelKey() == null && krg2.getTModelKey() == null)
39  			return 0;
40  		if (krg1.getTModelKey() == null)
41  			return -1;
42  		if (krg2.getTModelKey() == null)
43  			return 1;
44  			
45  		return krg1.getTModelKey().compareTo(krg2.getTModelKey());
46  	}
47  	
48  }