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Java > Open Source Codes > org > objectweb > jalisto > se > storage > raf > DbByteArrayInputStream


1 /*
2  * Jalisto - JAva LIght STOrage
3  * Copyright (C) 2000-2005 Xcalia http://www.xcalia.com
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
18  *
19  * Xcalia
20  * 71, rue Desnouettes
21  * 75014 Paris - France
22  * http://www.xcalia.com
23  */
24 package org.objectweb.jalisto.se.storage.raf;
25
26 import java.io.ByteArrayInputStream JavaDoc;
27 import java.util.ArrayList JavaDoc;
28
29 public class DbByteArrayInputStream extends ByteArrayInputStream JavaDoc {
30     private DbByteArrayInputStream(byte[] data) {
31         super(data);
32     }
33
34     public byte[] getDataToRead() {
35         return super.buf;
36     }
37
38     public synchronized void reset() {
39         super.reset();
40         instances.add(this);
41     }
42
43     /** *********************************** STATIC **************************************************** */
44
45     private static ArrayList JavaDoc instances = new ArrayList JavaDoc();
46
47     public static DbByteArrayInputStream getInstance(byte[] data) {
48         if (instances.isEmpty()) {
49             return new DbByteArrayInputStream(data);
50         }
51         try {
52             DbByteArrayInputStream in = (DbByteArrayInputStream) instances.remove(0);
53             in.buf = data;
54             in.count = data.length;
55             return in;
56         } catch (ArrayIndexOutOfBoundsException JavaDoc e) {
57             return new DbByteArrayInputStream(data);
58         }
59     }
60 }
61
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