01: /***
02: * Retrotranslator: a Java bytecode transformer that translates Java classes
03: * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
04: *
05: * Copyright (c) 2005 - 2008 Taras Puchko
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the copyright holders nor the names of its
17: * contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30: * THE POSSIBILITY OF SUCH DAMAGE.
31: */package net.sf.retrotranslator.runtime.java.lang;
32:
33: import java.util.*;
34: import net.sf.retrotranslator.registry.Advanced;
35:
36: /**
37: * @author Taras Puchko
38: */
39: @Advanced("ThreadLocal.remove")
40: public class InheritableThreadLocal_ extends ThreadLocal_ {
41:
42: private class Key {
43: public InheritableThreadLocal_ get() {
44: return InheritableThreadLocal_.this ;
45: }
46: }
47:
48: private static class Container extends
49: InheritableThreadLocal<Map<Key, Object>> {
50:
51: protected Map<Key, Object> initialValue() {
52: return new WeakHashMap<Key, Object>();
53: }
54:
55: protected Map<Key, Object> childValue(
56: Map<Key, Object> parentValue) {
57: WeakHashMap<Key, Object> result = new WeakHashMap<Key, Object>(
58: parentValue.size() * 2);
59: for (Map.Entry<Key, Object> entry : parentValue.entrySet()) {
60: Key key = entry.getKey();
61: result.put(key, key.get().childValue(entry.getValue()));
62: }
63: return result;
64: }
65: }
66:
67: private static final Container container = new Container();
68:
69: private final Key key = new Key();
70:
71: public InheritableThreadLocal_() {
72: }
73:
74: public Object get() {
75: Map<Key, Object> map = container.get();
76: Object value = map.get(key);
77: if (value == null && !map.containsKey(key)) {
78: map.put(key, value = initialValue());
79: }
80: return value;
81: }
82:
83: public void set(Object value) {
84: container.get().put(key, value);
85: }
86:
87: public void remove() {
88: container.get().remove(key);
89: }
90:
91: protected Object childValue(Object parentValue) {
92: return parentValue;
93: }
94:
95: }
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