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Java > Open Source Codes > org > apache > commons > vfs > provider > compressed > CompressedFileFileSystem


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.compressed;
17
18 import org.apache.commons.vfs.FileName;
19 import org.apache.commons.vfs.FileObject;
20 import org.apache.commons.vfs.FileSystem;
21 import org.apache.commons.vfs.FileSystemException;
22 import org.apache.commons.vfs.FileSystemOptions;
23 import org.apache.commons.vfs.provider.AbstractFileSystem;
24
25 import java.util.Collection JavaDoc;
26
27 /**
28  * A read-only file system for compressed files.
29  *
30  * @author <a HREF="mailto:imario@apache.org">Mario Ivankovits</a>
31  */
32 public abstract class CompressedFileFileSystem
33     extends AbstractFileSystem
34     implements FileSystem
35 {
36     protected CompressedFileFileSystem(final FileName rootName,
37                                        final FileObject parentLayer,
38                                        final FileSystemOptions fileSystemOptions)
39         throws FileSystemException
40     {
41         super(rootName, parentLayer, fileSystemOptions);
42     }
43
44     public void init() throws FileSystemException
45     {
46         super.init();
47
48     }
49
50     /**
51      * Returns the capabilities of this file system.
52      */
53     protected abstract void addCapabilities(final Collection JavaDoc caps);
54
55     /**
56      * Creates a file object.
57      */
58     protected abstract FileObject createFile(final FileName name) throws FileSystemException;
59 }
60
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