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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.FileObject;
21  import org.apache.commons.vfs.FileSystem;
22  
23  import java.util.HashMap;
24  import java.util.Map;
25  import java.util.TreeMap;
26  
27  /***
28   * A {@link org.apache.commons.vfs.FilesCache} implementation.<br>
29   * This implementation caches every file for the complete lifetime of the used {@link org.apache.commons.vfs.FileSystemManager}.
30   *
31   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
32   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
33   */
34  public class DefaultFilesCache extends AbstractFilesCache
35  {
36      private final Map filesystemCache = new HashMap(10);
37  
38      public void putFile(final FileObject file)
39      {
40          Map files = getOrCreateFilesystemCache(file.getFileSystem());
41          files.put(file.getName(), file);
42      }
43  
44      public FileObject getFile(final FileSystem filesystem, final FileName name)
45      {
46          Map files = getOrCreateFilesystemCache(filesystem);
47          return (FileObject) files.get(name);
48      }
49  
50      public void clear(FileSystem filesystem)
51      {
52          Map files = getOrCreateFilesystemCache(filesystem);
53          files.clear();
54      }
55  
56      protected Map getOrCreateFilesystemCache(FileSystem filesystem)
57      {
58          Map files = (Map) filesystemCache.get(filesystem);
59          if (files == null)
60          {
61              files = new TreeMap();
62              filesystemCache.put(filesystem, files);
63          }
64  
65          return files;
66      }
67  
68      public void close()
69      {
70          super.close();
71  
72          filesystemCache.clear();
73      }
74  
75      public void removeFile(FileSystem filesystem, FileName name)
76      {
77          Map files = getOrCreateFilesystemCache(filesystem);
78          files.remove(name);
79      }
80  
81      public void touchFile(FileObject file)
82      {
83      }
84  }