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1 package prefuse.util.collections;
2
3 import java.io.ByteArrayInputStream  ;
4 import java.io.InputStream ;
5
6
11 public class ByteArrayList {
12
13 private byte[] m_bytes;
14 private int m_size;
15
16 public ByteArrayList() {
17 this(4096);
18 }
19
20 public ByteArrayList(int capacity) {
21 m_bytes = new byte[capacity];
22 m_size = 0;
23 }
24
25 private void rangeCheck(int i) {
26 if ( i < 0 || i >= m_size )
27 throw new IndexOutOfBoundsException (
28 "Index: "+i+" Size: " + m_size);
29 }
30
31 private void ensureCapacity(int cap) {
32 if ( m_bytes.length < cap ) {
33 int capacity = Math.max((3*m_bytes.length)/2 + 1, cap);
34 byte[] nbytes = new byte[capacity];
35 System.arraycopy(m_bytes, 0, nbytes, 0, m_size);
36 m_bytes = nbytes;
37 }
38 }
39
40 public byte get(int i) {
41 rangeCheck(i);
42 return m_bytes[i];
43 }
44
45 public void set(int i, byte b) {
46 rangeCheck(i);
47 m_bytes[i] = b;
48 }
49
50 public int size() {
51 return m_size;
52 }
53
54 public void add(byte b) {
55 ensureCapacity(m_size+1);
56 m_bytes[m_size++] = b;
57 }
58
59 public void add(byte[] b, int start, int len) {
60 ensureCapacity(m_size+len);
61 System.arraycopy(b,start,m_bytes,m_size,len);
62 m_size += len;
63 }
64
65 public InputStream getAsInputStream() {
66 return new ByteArrayInputStream (m_bytes,0,m_size);
67 }
68
69 public byte[] toArray() {
70 byte[] b = new byte[m_size];
71 System.arraycopy(m_bytes,0,b,0,m_size);
72 return b;
73 }
74 }
75 |
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