1 /*
2 * Copyright (c) 2003 Peter Antman, Teknik i Media <peter.antman@tim.se>
3 *
4 * $Id: ByteCachedInputStream.java,v 1.1.1.1 2004/05/19 12:07:30 pra Exp $
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20 package org.backsource.utils.io;
21 import java.io.BufferedInputStream;
22 import java.io.ByteArrayInputStream;
23 import java.io.IOException;
24 /***
25 * This is an InputStream that reads from cached data it will get
26 * from a CachedOutputStream.
27 *
28 * <p>The stream is therefore possible to reuse, after rewind has
29 been invoked.</p>
30 *
31 * @author <a href="mailto:pra@tim.se">Peter Antman</a>
32 * @version $Revision: 1.1.1.1 $
33 */
34
35 public class ByteCachedInputStream extends CachedInputStream{
36 /*** The underlying cached data */
37 byte[] data;
38 /*** The stream reading from data */
39 ByteArrayInputStream source;
40
41 /***
42 * Get a CachedInputStream from the CachedOutputStream.
43 */
44 public ByteCachedInputStream (ByteCachedOutputStream cout) throws IOException{
45 this( (byte[])cout.getSink() );
46 }
47 public ByteCachedInputStream (byte[] data) throws IOException{
48 super(new ByteArrayInputStream(data));
49 this.data = data;
50 source = (ByteArrayInputStream)in;
51 }
52
53 public void rewind() throws IOException {
54 // Resetting both the source and the buffer does not work, since that
55 // will produce both the completly buffered data and all the data from
56 // the source
57 // Therefore we only reset the source, and clean up the buffered stream
58 // Is this really needed when reset al the pointers???
59 count = 0;
60 pos = 0;
61 markpos = -1;
62 source.reset();
63 }
64
65 }// CachedInputStream