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: File.java 376 2005-12-29 03:14:44Z mat007 $
29 */
30
31 package palmed.file;
32
33 import java.io.IOException;
34 import java.io.InputStream;
35 import java.io.OutputStream;
36 import javax.microedition.io.Connector;
37 import javax.microedition.io.InputConnection;
38 import javax.microedition.io.file.FileConnection;
39
40 /***
41 * This class represents a file on the file system.
42 *
43 * @author Mathieu Champlon
44 * @version $Revision: 376 $ $Date: 2005-12-29 12:14:44 +0900 (jeu., 29 déc. 2005) $
45 */
46 public final class File implements IFile
47 {
48 /***
49 * The prefix for file connection descriptors.
50 */
51 private static final String PREFIX = "file:///";
52 /***
53 * The file path.
54 */
55 private final String path_;
56
57 /***
58 * Create a file.
59 *
60 * @param path the absolute file path.
61 */
62 public File( final String path )
63 {
64 if( path == null )
65 throw new IllegalArgumentException( "parameter 'path' is null" );
66 path_ = path;
67 }
68
69 /***
70 * {@inheritDoc}
71 */
72 public InputStream openInputStream() throws IOException
73 {
74 final InputConnection connection = (InputConnection)Connector.open( PREFIX + path_, Connector.READ );
75 final InputStream stream = connection.openInputStream();
76 connection.close();
77 return stream;
78 }
79
80 /***
81 * {@inheritDoc}
82 */
83 public OutputStream openOutputStream() throws IOException
84 {
85 final FileConnection connection = (FileConnection)Connector.open( PREFIX + path_ );
86 if( !connection.exists() )
87 connection.create();
88 final OutputStream stream = connection.openOutputStream();
89 connection.close();
90 return stream;
91 }
92
93 /***
94 * {@inheritDoc}
95 */
96 public String toString()
97 {
98 return path_;
99 }
100
101 /***
102 * {@inheritDoc}
103 */
104 public boolean equals( final Object object )
105 {
106 if( object instanceof File )
107 return path_.equals( ((File)object).path_ );
108 return false;
109 }
110
111 /***
112 * {@inheritDoc}
113 */
114 public int hashCode()
115 {
116 return path_.hashCode();
117 }
118
119 /***
120 * {@inheritDoc}
121 */
122 public boolean exists()
123 {
124 try
125 {
126 final FileConnection connection = (FileConnection)Connector.open( PREFIX + path_, Connector.READ );
127 final boolean exists = connection.exists();
128 connection.close();
129 return exists;
130 }
131 catch( IOException e )
132 {
133 return false;
134 }
135 }
136 }