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17 package org.apache.commons.vfs.provider.zip;
18
19 import org.apache.commons.vfs.Capability;
20 import org.apache.commons.vfs.FileName;
21 import org.apache.commons.vfs.FileObject;
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.FileType;
26 import org.apache.commons.vfs.provider.AbstractLayeredFileProvider;
27 import org.apache.commons.vfs.provider.FileProvider;
28 import org.apache.commons.vfs.provider.LayeredFileName;
29
30 import java.util.Arrays;
31 import java.util.Collection;
32 import java.util.Collections;
33
34 /***
35 * A file system provider for Zip files. Provides read-only file systems.
36 *
37 * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
38 * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
39 */
40 public class ZipFileProvider
41 extends AbstractLayeredFileProvider
42 implements FileProvider
43 {
44 protected final static Collection capabilities = Collections.unmodifiableCollection(Arrays.asList(new Capability[]
45 {
46 Capability.GET_LAST_MODIFIED,
47 Capability.GET_TYPE,
48 Capability.LIST_CHILDREN,
49 Capability.READ_CONTENT,
50 Capability.URI,
51 Capability.COMPRESS,
52 Capability.VIRTUAL
53 }));
54
55 public ZipFileProvider()
56 {
57 super();
58 }
59
60 /***
61 * Creates a layered file system. This method is called if the file system
62 * is not cached.
63 *
64 * @param scheme The URI scheme.
65 * @param file The file to create the file system on top of.
66 * @return The file system.
67 */
68 protected FileSystem doCreateFileSystem(final String scheme,
69 final FileObject file,
70 final FileSystemOptions fileSystemOptions)
71 throws FileSystemException
72 {
73 final FileName rootName =
74 new LayeredFileName(scheme, file.getName(), FileName.ROOT_PATH, FileType.FOLDER);
75 return new ZipFileSystem(rootName, file, fileSystemOptions);
76 }
77
78 public Collection getCapabilities()
79 {
80 return capabilities;
81 }
82 }