| InitialThreadLocal.java |
1 /**
2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.portal.kernel.util;
24
25 import com.liferay.portal.kernel.log.Log;
26 import com.liferay.portal.kernel.log.LogFactoryUtil;
27
28 import java.lang.Cloneable;
29 import java.lang.reflect.Method;
30
31 /**
32 * <a href="InitialThreadLocal.java.html"><b><i>View Source</i></b></a>
33 *
34 * @author Brian Wing Shun Chan
35 *
36 */
37 public class InitialThreadLocal<T> extends ThreadLocal<T> {
38
39 public InitialThreadLocal(T initialValue) {
40 _initialValue = initialValue;
41 }
42
43 protected T initialValue() {
44 if (_initialValue instanceof Cloneable) {
45 try {
46 Method method = _initialValue.getClass().getMethod(
47 _METHOD_CLONE);
48
49 return (T)method.invoke(_initialValue);
50 }
51 catch (Exception e) {
52 _log.error(e, e);
53 }
54 }
55
56 return _initialValue;
57 }
58
59 private static final String _METHOD_CLONE = "clone";
60
61 private static Log _log = LogFactoryUtil.getLog(InitialThreadLocal.class);
62
63 private T _initialValue;
64
65 }