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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.local;
18  
19  import org.apache.commons.vfs.FileName;
20  import org.apache.commons.vfs.FileObject;
21  import org.apache.commons.vfs.FileSelector;
22  import org.apache.commons.vfs.FileSystem;
23  import org.apache.commons.vfs.FileSystemException;
24  import org.apache.commons.vfs.FileSystemOptions;
25  import org.apache.commons.vfs.provider.AbstractFileSystem;
26  
27  import java.io.File;
28  import java.io.FilePermission;
29  import java.util.Collection;
30  
31  /***
32   * A local file system.
33   *
34   * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
35   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
36   */
37  public class LocalFileSystem
38      extends AbstractFileSystem
39      implements FileSystem
40  {
41      private final String rootFile;
42  
43      public LocalFileSystem(final FileName rootName,
44                             final String rootFile,
45                             final FileSystemOptions opts)
46      {
47          super(rootName, null, opts);
48          this.rootFile = rootFile;
49      }
50  
51      /***
52       * Creates a file object.
53       */
54      protected FileObject createFile(final FileName name) throws FileSystemException
55      {
56          // Create the file
57          return new LocalFile(this, rootFile, name);
58      }
59  
60      /***
61       * Returns the capabilities of this file system.
62       */
63      protected void addCapabilities(final Collection caps)
64      {
65          caps.addAll(DefaultLocalFileProvider.capabilities);
66      }
67  
68      /***
69       * Creates a temporary local copy of a file and its descendents.
70       */
71      protected File doReplicateFile(final FileObject fileObject,
72                                     final FileSelector selector)
73          throws Exception
74      {
75          final LocalFile localFile = (LocalFile) fileObject;
76          final File file = localFile.getLocalFile();
77          final SecurityManager sm = System.getSecurityManager();
78          if (sm != null)
79          {
80              final FilePermission requiredPerm = new FilePermission(file.getAbsolutePath(), "read");
81              sm.checkPermission(requiredPerm);
82          }
83          return file;
84      }
85  
86  }