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Java > Open Source Codes > org > apache > commons > vfs > provider > FileSystemKey


1 /*
2  * Copyright 2002-2005 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 package org.apache.commons.vfs.provider;
17
18 import org.apache.commons.vfs.FileSystemOptions;
19
20 /**
21  * Used to identify a filesystem
22  *
23  * @author <a HREF="mailto:imario@apache.org">Mario Ivankovits</a>
24  */
25 class FileSystemKey implements Comparable JavaDoc
26 {
27     private final static FileSystemOptions EMPTY_OPTIONS = new FileSystemOptions();
28
29     final Comparable JavaDoc key;
30     final FileSystemOptions fileSystemOptions;
31
32     FileSystemKey(final Comparable JavaDoc key, final FileSystemOptions fileSystemOptions)
33     {
34         this.key = key;
35         if (fileSystemOptions != null)
36         {
37             this.fileSystemOptions = fileSystemOptions;
38         }
39         else
40         {
41             this.fileSystemOptions = EMPTY_OPTIONS;
42         }
43     }
44
45     public int compareTo(Object JavaDoc o)
46     {
47         FileSystemKey fk = (FileSystemKey) o;
48
49         int ret = key.compareTo(fk.key);
50         if (ret != 0)
51         {
52             // other filesystem
53 return ret;
54         }
55
56         return fileSystemOptions.compareTo(fk.fileSystemOptions);
57     }
58 }
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