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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.cache;
18  
19  import org.apache.commons.vfs.FileName;
20  import org.apache.commons.vfs.FileSystem;
21  
22  /***
23   * Key for various cache implementations.<br>
24   * It compares the fileSystem (by hashCode) and the filename.
25   *
26   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
27   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
28   */
29  class FileSystemAndNameKey implements Comparable
30  {
31      private final FileSystem fileSystem;
32      private final FileName fileName;
33      private final int fileSystemId;
34  
35      FileSystemAndNameKey(final FileSystem fileSystem, final FileName fileName)
36      {
37          this.fileSystem = fileSystem;
38          this.fileSystemId = System.identityHashCode(fileSystem);
39  
40          this.fileName = fileName;
41      }
42  
43      public int compareTo(Object o)
44      {
45          FileSystemAndNameKey other = (FileSystemAndNameKey) o;
46  
47          if (fileSystemId < other.fileSystemId)
48          {
49              return -1;
50          }
51          if (fileSystemId > other.fileSystemId)
52          {
53              return 1;
54          }
55  
56          return fileName.compareTo(other.fileName);
57      }
58  
59      FileSystem getFileSystem()
60      {
61          return fileSystem;
62      }
63  
64      FileName getFileName()
65      {
66          return fileName;
67      }
68  }