| InitialThreadLocal.java |
1 /**
2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or modify it under
5 * the terms of the GNU Lesser General Public License as published by the Free
6 * Software Foundation; either version 2.1 of the License, or (at your option)
7 * any later version.
8 *
9 * This library is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12 * details.
13 */
14
15 package com.liferay.portal.kernel.util;
16
17 import com.liferay.portal.kernel.log.Log;
18 import com.liferay.portal.kernel.log.LogFactoryUtil;
19
20 import java.lang.reflect.Method;
21
22 /**
23 * <a href="InitialThreadLocal.java.html"><b><i>View Source</i></b></a>
24 *
25 * @author Brian Wing Shun Chan
26 * @author Shuyang Zhou
27 */
28 public class InitialThreadLocal<T> extends ThreadLocal<T> {
29
30 public InitialThreadLocal(T initialValue) {
31 _initialValue = initialValue;
32
33 if (_initialValue instanceof Cloneable) {
34 try {
35 _cloneMethod = _initialValue.getClass().getMethod(
36 _METHOD_CLONE);
37 }
38 catch (Exception e) {
39 _log.error(e, e);
40 }
41 }
42 }
43
44 protected T initialValue() {
45 if (_cloneMethod != null) {
46 try {
47 return (T)_cloneMethod.invoke(_initialValue);
48 }
49 catch (Exception e) {
50 _log.error(e, e);
51 }
52 }
53
54 return _initialValue;
55 }
56
57 private static final String _METHOD_CLONE = "clone";
58
59 private static Log _log = LogFactoryUtil.getLog(InitialThreadLocal.class);
60
61 private Method _cloneMethod;
62 private T _initialValue;
63
64 }