1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id: Root.java 419 2006-10-30 09:30:41Z mat007 $
29 */
30
31 package palmed.file;
32
33 import java.io.IOException;
34 import java.util.Enumeration;
35 import javax.microedition.io.file.FileSystemRegistry;
36
37 /***
38 * This class implements the root of all file systems roots.
39 *
40 * @author Mathieu Champlon
41 * @version $Revision: 419 $ $Date: 2006-10-30 18:30:41 +0900 (lun., 30 oct. 2006) $
42 */
43 public final class Root implements IDirectory
44 {
45 /***
46 * {@inheritDoc}
47 */
48 public IDirectory select( final String filename, final IFileBrowserListener listener )
49 {
50 return new Directory( this, filename );
51 }
52
53 /***
54 * {@inheritDoc}
55 */
56 public void accept( final IDirectoryVisitor visitor )
57 {
58 final Enumeration enumeration = FileSystemRegistry.listRoots();
59 while( enumeration.hasMoreElements() )
60 visitor.visitDirectory( (String)enumeration.nextElement() );
61 }
62
63 /***
64 * {@inheritDoc}
65 */
66 public boolean isWritable()
67 {
68 return false;
69 }
70
71 /***
72 * {@inheritDoc}
73 */
74 public void create( final String name ) throws IOException
75 {
76 throw new IOException( "cannot create a sub-directory at root level" );
77 }
78
79 /***
80 * {@inheritDoc}
81 */
82 public boolean isInPath( final String name )
83 {
84 return false;
85 }
86 }