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.KeyedReference;
23
24 /**
25 * @author <a href="mailto:jfaath@apache.org">Jeff Faath</a>
26 */
27 public class KeyedRefTModelComparator implements Comparator<KeyedReference>, Serializable {
28 private static final long serialVersionUID = 1L;
29
30 public int compare(KeyedReference kr1, KeyedReference kr2) {
31 if (kr1 == null && kr2 == null)
32 return 0;
33 if (kr1 == null)
34 return -1;
35 if (kr2 == null)
36 return 1;
37
38 if (kr1.getTModelKey() == null && kr2.getTModelKey() == null)
39 return 0;
40 if (kr1.getTModelKey() == null)
41 return -1;
42 if (kr2.getTModelKey() == null)
43 return 1;
44
45 return kr1.getTModelKey().compareTo(kr2.getTModelKey());
46 }
47
48 }