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: Directory.java 420 2006-10-30 09:31:59Z mat007 $
29 */
30
31 package palmed.file;
32
33 import java.io.IOException;
34 import java.util.Enumeration;
35 import javax.microedition.io.Connector;
36 import javax.microedition.io.file.FileConnection;
37
38 /***
39 * This class implements a directory descriptor.
40 *
41 * @author Mathieu Champlon
42 * @version $Revision: 420 $ $Date: 2006-10-30 18:31:59 +0900 (lun., 30 oct. 2006) $
43 */
44 public final class Directory implements IDirectory
45 {
46 /***
47 * The prefix for file connection descriptors.
48 */
49 private static final String PREFIX = "file:///";
50 /***
51 * The upper directory filename.
52 */
53 private static final String UP_DIRECTORY = "..";
54 /***
55 * The file names directory separator string.
56 */
57 private static final String SEPARATOR = System.getProperty( "file.separator" );
58 /***
59 * The descriptor path.
60 */
61 private final String path_;
62 /***
63 * The parent directory.
64 */
65 private final IDirectory parent_;
66
67 /***
68 * Create a descriptor.
69 *
70 * @param parent the parent descriptor
71 * @param path the descriptor path
72 */
73 public Directory( final IDirectory parent, final String path )
74 {
75 if( parent == null )
76 throw new IllegalArgumentException( "parameter 'parent' is null" );
77 if( path == null )
78 throw new IllegalArgumentException( "parameter 'path' is null" );
79 parent_ = parent;
80 path_ = path;
81 }
82
83 /***
84 * {@inheritDoc}
85 */
86 public IDirectory select( final String filename, final IFileBrowserListener listener )
87 {
88 if( filename.equals( UP_DIRECTORY ) )
89 return parent_;
90 if( isDirectory( path_ + filename ) )
91 return new Directory( this, path_ + filename );
92 if( listener != null )
93 listener.select( new File( path_ + filename ) );
94 return this;
95 }
96
97 /***
98 * {@inheritDoc}
99 */
100 public void accept( final IDirectoryVisitor visitor ) throws IOException
101 {
102 visitor.visitDirectory( UP_DIRECTORY );
103 final Enumeration enumeration = list();
104 while( enumeration.hasMoreElements() )
105 {
106 final String filename = (String)enumeration.nextElement();
107 if( isDirectory( filename ) )
108 visitor.visitDirectory( filename );
109 else
110 visitor.visitFile( filename );
111 }
112 }
113
114 private Enumeration list() throws IOException
115 {
116 final FileConnection connection = (FileConnection)Connector.open( PREFIX + path_, Connector.READ );
117 final Enumeration enumeration = connection.list();
118 connection.close();
119 return enumeration;
120 }
121
122 private boolean isDirectory( final String filename )
123 {
124 return filename.endsWith( SEPARATOR );
125 }
126
127 /***
128 * {@inheritDoc}
129 */
130 public String toString()
131 {
132 return path_;
133 }
134
135 /***
136 * {@inheritDoc}
137 */
138 public boolean isWritable()
139 {
140 return true;
141 }
142
143 /***
144 * {@inheritDoc}
145 */
146 public void create( final String name ) throws IOException
147 {
148 final FileConnection connection = (FileConnection)Connector.open( PREFIX + path_ + name, Connector.WRITE );
149 connection.mkdir();
150 connection.close();
151 }
152
153 /***
154 * {@inheritDoc}
155 */
156 public boolean isInPath( final String name )
157 {
158 return path_.equals( name ) || parent_.isInPath( name );
159 }
160 }