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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.impl;
18  
19  import org.apache.commons.vfs.FileName;
20  import org.apache.commons.vfs.FileObject;
21  import org.apache.commons.vfs.FileSystemException;
22  import org.apache.commons.vfs.FileType;
23  import org.apache.commons.vfs.provider.AbstractVfsContainer;
24  
25  
26  /***
27   * A virtual filesystem provider.
28   *
29   * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
30   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
31   */
32  public class VirtualFileProvider
33      extends AbstractVfsContainer
34  {
35      /***
36       * Creates a virtual file system, with the supplied file as its root.
37       */
38      public FileObject createFileSystem(final FileObject rootFile)
39          throws FileSystemException
40      {
41          final FileName rootName =
42              getContext().getFileSystemManager().resolveName(rootFile.getName(), FileName.ROOT_PATH);
43          // final FileName rootName =
44          //    new BasicFileName(rootFile.getName(), FileName.ROOT_PATH);
45          final VirtualFileSystem fs = new VirtualFileSystem(rootName, rootFile.getFileSystem().getFileSystemOptions());
46          addComponent(fs);
47          fs.addJunction(FileName.ROOT_PATH, rootFile);
48          return fs.getRoot();
49      }
50  
51      /***
52       * Creates an empty virtual file system.
53       */
54      public FileObject createFileSystem(final String rootUri) throws FileSystemException
55      {
56          final FileName rootName =
57              new VirtualFileName(rootUri, FileName.ROOT_PATH, FileType.FOLDER);
58          // final FileName rootName =
59          //    new BasicFileName(rootUri, FileName.ROOT_PATH);
60          final VirtualFileSystem fs = new VirtualFileSystem(rootName, null);
61          addComponent(fs);
62          return fs.getRoot();
63      }
64  }