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Java > Open Source Codes > com > imagero > uio > io > ByteArrayOutputStreamExt


1 /*
2  * Copyright (c) Andrey Kuznetsov. All Rights Reserved.
3  *
4  * http://uio.imagero.com
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * o Redistributions of source code must retain the above copyright notice,
10  * this list of conditions and the following disclaimer.
11  *
12  * o Redistributions in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
14  * and/or other materials provided with the distribution.
15  *
16  * o Neither the name of imagero Andrei Kouznetsov nor the names of
17  * its contributors may be used to endorse or promote products derived
18  * from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
29  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 package com.imagero.uio.io;
33
34 import java.io.ByteArrayOutputStream JavaDoc;
35
36 /**
37  * extends ByteArrayOutputStream with posibility to drain off data into user specified buffer.
38  * @author Andrey Kuznetsov
39  */
40 public class ByteArrayOutputStreamExt extends ByteArrayOutputStream JavaDoc {
41
42     public ByteArrayOutputStreamExt() {
43     }
44
45     public ByteArrayOutputStreamExt(int size) {
46         super(size);
47     }
48
49     /**
50      * Fill destination buffer with data which is removed from start of this buffer.
51      * @param dest destination buffer
52      * @return how much bytes was moved from this buffer into destination buffer.
53      */
54     public synchronized int drain(byte[] dest) {
55         int length = Math.min(dest.length, count);
56         if (length > 0) {
57             System.arraycopy(buf, 0, dest, 0, length);
58             for (int i = 0; i < count - length; i++) {
59                 buf[i] = buf[i + length];
60             }
61             count -= length;
62         }
63         return length;
64     }
65 }
66
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