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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.vfs.provider;
18  
19  import org.apache.commons.vfs.FileSystemOptions;
20  
21  /***
22   * Used to identify a filesystem
23   *
24   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
25   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
26   */
27  class FileSystemKey implements Comparable
28  {
29      private final static FileSystemOptions EMPTY_OPTIONS = new FileSystemOptions();
30  
31      final Comparable key;
32      final FileSystemOptions fileSystemOptions;
33  
34      FileSystemKey(final Comparable key, final FileSystemOptions fileSystemOptions)
35      {
36          this.key = key;
37          if (fileSystemOptions != null)
38          {
39              this.fileSystemOptions = fileSystemOptions;
40          }
41          else
42          {
43              this.fileSystemOptions = EMPTY_OPTIONS;
44          }
45      }
46  
47      public int compareTo(Object o)
48      {
49          FileSystemKey fk = (FileSystemKey) o;
50  
51          int ret = key.compareTo(fk.key);
52          if (ret != 0)
53          {
54              // other filesystem
55              return ret;
56          }
57  
58          return fileSystemOptions.compareTo(fk.fileSystemOptions);
59      }
60  }