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ProxyConnectorConfigurationOrderComparator xref
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1   package org.apache.archiva.configuration.functors;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.archiva.configuration.ProxyConnectorConfiguration;
23  
24  import java.util.Comparator;
25  
26  /**
27   *
28   * Was marked as deprecated before, but is still used.
29   *
30   */
31  public class ProxyConnectorConfigurationOrderComparator
32      implements Comparator<ProxyConnectorConfiguration>
33  {
34      private static ProxyConnectorConfigurationOrderComparator INSTANCE =
35          new ProxyConnectorConfigurationOrderComparator();
36  
37      @Override
38      public int compare( ProxyConnectorConfigurationorg/apache/archiva/configuration/ProxyConnectorConfiguration.html#ProxyConnectorConfiguration">ProxyConnectorConfiguration o1, ProxyConnectorConfiguration o2 )
39      {
40          if ( o1 == null && o2 == null )
41          {
42              return 0;
43          }
44  
45          // Ensure null goes to end of list.
46          if ( o1 == null && o2 != null )
47          {
48              return 1;
49          }
50  
51          if ( o1 != null && o2 == null )
52          {
53              return -1;
54          }
55  
56          // Ensure 0 (unordered) goes to end of list.
57          if ( o1.getOrder() == 0 && o2.getOrder() != 0 )
58          {
59              return 1;
60          }
61  
62          if ( o1.getOrder() != 0 && o2.getOrder() == 0 )
63          {
64              return -1;
65          }
66  
67          return o1.getOrder() - o2.getOrder();
68      }
69  
70      public static ProxyConnectorConfigurationOrderComparator getInstance()
71      {
72          return INSTANCE;
73      }
74  }