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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.vfs2.provider.gzip;
18  
19  import java.util.Arrays;
20  import java.util.Collection;
21  import java.util.Collections;
22  
23  import org.apache.commons.vfs2.Capability;
24  import org.apache.commons.vfs2.FileName;
25  import org.apache.commons.vfs2.FileObject;
26  import org.apache.commons.vfs2.FileSystem;
27  import org.apache.commons.vfs2.FileSystemException;
28  import org.apache.commons.vfs2.FileSystemOptions;
29  import org.apache.commons.vfs2.provider.compressed.CompressedFileFileProvider;
30  
31  /**
32   * Provides access to the content of gzip compressed files.
33   */
34  public class GzipFileProvider extends CompressedFileFileProvider {
35  
36      /**
37       * Capabilities.
38       */
39      protected static final Collection<Capability> capabilities = Collections.unmodifiableCollection(Arrays
40              .asList(new Capability[] { Capability.GET_LAST_MODIFIED, Capability.GET_TYPE, Capability.LIST_CHILDREN,
41                      Capability.WRITE_CONTENT, Capability.READ_CONTENT, Capability.URI, Capability.COMPRESS }));
42  
43      public GzipFileProvider() {
44          super();
45      }
46  
47      @Override
48      protected FileSystem createFileSystem(final FileName name, final FileObject file,
49              final FileSystemOptions fileSystemOptions) throws FileSystemException {
50          return new GzipFileSystem(name, file, fileSystemOptions);
51      }
52  
53      @Override
54      public Collection<Capability> getCapabilities() {
55          return capabilities;
56      }
57  }