Mercurial > jdk8-mips64-public > jaxws / file comparison
comparison: src/share/jaxws_classes/com/sun/xml/internal/ws/util/xml/ContextClassloaderLocal.java
src/share/jaxws_classes/com/sun/xml/internal/ws/util/xml/ContextClassloaderLocal.java
- changeset 515
- 6cd506508147
- parent 0
- 373ffda63c9a
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| 514:29a761eaff0d | 515:6cd506508147 |
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| 1 /* | |
| 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. Oracle designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Oracle in the LICENSE file that accompanied this code. | |
| 10 * | |
| 11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 * accompanied this code). | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License version | |
| 18 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 * | |
| 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 * or visit www.oracle.com if you need additional information or have any | |
| 23 * questions. | |
| 24 */ | |
| 25 | |
| 26 package com.sun.xml.internal.ws.util.xml; | |
| 27 | |
| 28 import java.security.AccessController; | |
| 29 import java.security.PrivilegedAction; | |
| 30 import java.text.MessageFormat; | |
| 31 import java.util.ResourceBundle; | |
| 32 import java.util.WeakHashMap; | |
| 33 | |
| 34 /** | |
| 35 * Simple utility ensuring that the value is cached only in case it is non-internal implementation | |
| 36 */ | |
| 37 abstract class ContextClassloaderLocal<V> { | |
| 38 | |
| 39 private static final String FAILED_TO_CREATE_NEW_INSTANCE = "FAILED_TO_CREATE_NEW_INSTANCE"; | |
| 40 | |
| 41 private WeakHashMap<ClassLoader, V> CACHE = new WeakHashMap<ClassLoader, V>(); | |
| 42 | |
| 43 public V get() throws Error { | |
| 44 ClassLoader tccl = getContextClassLoader(); | |
| 45 V instance = CACHE.get(tccl); | |
| 46 if (instance == null) { | |
| 47 instance = createNewInstance(); | |
| 48 CACHE.put(tccl, instance); | |
| 49 } | |
| 50 return instance; | |
| 51 } | |
| 52 | |
| 53 public void set(V instance) { | |
| 54 CACHE.put(getContextClassLoader(), instance); | |
| 55 } | |
| 56 | |
| 57 protected abstract V initialValue() throws Exception; | |
| 58 | |
| 59 private V createNewInstance() { | |
| 60 try { | |
| 61 return initialValue(); | |
| 62 } catch (Exception e) { | |
| 63 throw new Error(format(FAILED_TO_CREATE_NEW_INSTANCE, getClass().getName()), e); | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 private static String format(String property, Object... args) { | |
| 68 String text = ResourceBundle.getBundle(ContextClassloaderLocal.class.getName()).getString(property); | |
| 69 return MessageFormat.format(text, args); | |
| 70 } | |
| 71 | |
| 72 private static ClassLoader getContextClassLoader() { | |
| 73 return (ClassLoader) | |
| 74 AccessController.doPrivileged(new PrivilegedAction() { | |
| 75 public Object run() { | |
| 76 ClassLoader cl = null; | |
| 77 try { | |
| 78 cl = Thread.currentThread().getContextClassLoader(); | |
| 79 } catch (SecurityException ex) { | |
| 80 } | |
| 81 return cl; | |
| 82 } | |
| 83 }); | |
| 84 } | |
| 85 } | |
| 86 |
