| FiniteStack.java |
1 /**
2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 *
12 *
13 */
14
15 package com.liferay.util;
16
17 import java.util.Stack;
18
19 /**
20 * <a href="FiniteStack.java.html"><b><i>View Source</i></b></a>
21 *
22 * @author Brian Wing Shun Chan
23 */
24 public class FiniteStack<E> extends Stack<E> {
25
26 public FiniteStack(int maxSize) {
27 super();
28
29 _maxSize = maxSize;
30 }
31
32 public E push(E item) {
33 super.push(item);
34
35 int size = size();
36
37 if (size > _maxSize) {
38 removeElementAt(size - 1);
39 }
40
41 return item;
42 }
43
44 private int _maxSize;
45
46 }