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1 package org.jbpm.bytes;
2
3 import java.util.ArrayList  ;
4 import java.util.Iterator ;
5 import java.util.List ;
6
7
11 public abstract class ByteBlockChopper {
12
13 private static final int BLOCKSIZE = 1024;
14
15 public static List chopItUp(byte[] byteArray) {
16 List bytes = null;
17 if ( (byteArray!=null)
18 && (byteArray.length>0) ){
19 bytes = new ArrayList ();
20 int index = 0;
21 while ( (byteArray.length-index) > BLOCKSIZE ) {
22 byte[] byteBlock = new byte[BLOCKSIZE];
23 System.arraycopy(byteArray, index, byteBlock, 0, BLOCKSIZE);
24 bytes.add(byteBlock);
25 index+=BLOCKSIZE;
26 }
27 byte[] byteBlock = new byte[byteArray.length-index];
28 System.arraycopy(byteArray, index, byteBlock, 0, byteArray.length-index);
29 bytes.add(byteBlock);
30 }
31 return bytes;
32 }
33
34 public static byte[] glueChopsBackTogether(List bytes) {
35 byte[] value = null;
36
37 if (bytes!=null) {
38 Iterator iter = bytes.iterator();
39 while (iter.hasNext()) {
40 byte[] byteBlock = (byte[]) iter.next();
41 if (value==null) {
42 value = byteBlock;
43 } else {
44 byte[] oldValue = value;
45 value = new byte[value.length+byteBlock.length];
46 System.arraycopy(oldValue, 0, value, 0, oldValue.length);
47 System.arraycopy(byteBlock, 0, value, oldValue.length, byteBlock.length);
48 }
49 }
50 }
51
52 return value;
53 }
54 }
55 |
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