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 * $Id$
29 */
30
31 package palmed.file;
32
33 import java.io.IOException;
34 import java.util.Enumeration;
35 import java.util.Vector;
36 import javax.microedition.lcdui.Image;
37 import javax.microedition.lcdui.List;
38
39 /***
40 * This class retrieves the content of a given directory.
41 *
42 * @author Mathieu Champlon
43 * @version $Revision$ $Date$
44 */
45 public final class DirectoryVisitor implements IDirectoryVisitor
46 {
47 /***
48 * The retrieved directories and files.
49 */
50 private final Vector directories_, files_;
51 /***
52 * The directory and file icons.
53 */
54 private final Image directoryIcon_, fileIcon_;
55
56 /***
57 * Create a directory visitor.
58 */
59 public DirectoryVisitor()
60 {
61 directories_ = new Vector();
62 files_ = new Vector();
63 directoryIcon_ = load( "/icons/folder.png" );
64 fileIcon_ = load( "/icons/text-x-generic.png" );
65 }
66
67 private Image load( final String filename )
68 {
69 try
70 {
71 return Image.createImage( filename );
72 }
73 catch( Exception e )
74 {
75 throw new RuntimeException( e.getMessage() );
76 }
77 }
78
79 /***
80 * Lists alphabetically the directories and files contained in a given directory.
81 *
82 * @param list the list to fill
83 * @param directory the directory to visit
84 * @throws IOException an io exception occured
85 */
86 public void fill( final List list, final IDirectory directory ) throws IOException
87 {
88 files_.removeAllElements();
89 directories_.removeAllElements();
90 directory.accept( this );
91 Enumeration e = directories_.elements();
92 while( e.hasMoreElements() )
93 list.append( (String)e.nextElement(), directoryIcon_ );
94 e = files_.elements();
95 while( e.hasMoreElements() )
96 list.append( (String)e.nextElement(), fileIcon_ );
97 }
98
99 /***
100 * {@inheritDoc}
101 */
102 public void visitFile( final String name )
103 {
104 insertSorted( files_, name );
105 }
106
107 /***
108 * {@inheritDoc}
109 */
110 public void visitDirectory( final String name )
111 {
112 insertSorted( directories_, name );
113 }
114
115 private void insertSorted( final Vector vector, final String name )
116 {
117 for( int index = 0; index < vector.size(); ++index )
118 {
119 if( before( name, (String)vector.elementAt( index ) ) )
120 {
121 vector.insertElementAt( name, index );
122 return;
123 }
124 }
125 vector.addElement( name );
126 }
127
128 private boolean before( final String str1, final String str2 )
129 {
130 return str1.toLowerCase().compareTo( str2.toLowerCase() ) < 0;
131 }
132 }