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1
16
17 package org.apache.cocoon.util;
18
19
25 public class ResizableContainer {
26
27 private int pointer = -1;
28 private int size = 0;
29 private Object  [] container;
30
31 public ResizableContainer(int initialCapacity){
32 this.container = new Object [initialCapacity];
33 }
34
35 public void add(Object o) {
36 set(++pointer,o);
37 }
38
39 public void set(int index, Object o) {
40 adjustPointer(index);
41 ensureCapacity(index+1);
42 container[index] = o;
43 size++;
44 }
45
46 public Object get(int index) {
47 return (index < container.length) ? container[index] : null;
48 }
49
50 public int size() {
51 return size;
52 }
53
54 private void adjustPointer(int newPointer) {
55 this.pointer = Math.max(this.pointer, newPointer);
56 }
57
58 private void ensureCapacity(int minCapacity) {
59 int oldCapacity = container.length;
60 if (oldCapacity < minCapacity) {
61 Object [] oldContainer = container;
62 int newCapacity = (oldCapacity * 3)/2 + 1;
63 if (newCapacity < minCapacity) {
64 newCapacity = minCapacity;
65 }
66 container = new Object [newCapacity];
67 System.arraycopy(oldContainer, 0, container, 0, oldContainer.length);
68 }
69 }
70 }
71 |
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