1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/ws/policy/sourcemodel/attach/ContextClassloaderLocal.java Fri Feb 14 11:13:45 2014 +0100
1.3 @@ -0,0 +1,86 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package com.sun.xml.internal.ws.policy.sourcemodel.attach;
1.30 +
1.31 +import java.security.AccessController;
1.32 +import java.security.PrivilegedAction;
1.33 +import java.text.MessageFormat;
1.34 +import java.util.ResourceBundle;
1.35 +import java.util.WeakHashMap;
1.36 +
1.37 +/**
1.38 + * Simple utility ensuring that the value is cached only in case it is non-internal implementation
1.39 + */
1.40 +abstract class ContextClassloaderLocal<V> {
1.41 +
1.42 + private static final String FAILED_TO_CREATE_NEW_INSTANCE = "FAILED_TO_CREATE_NEW_INSTANCE";
1.43 +
1.44 + private WeakHashMap<ClassLoader, V> CACHE = new WeakHashMap<ClassLoader, V>();
1.45 +
1.46 + public V get() throws Error {
1.47 + ClassLoader tccl = getContextClassLoader();
1.48 + V instance = CACHE.get(tccl);
1.49 + if (instance == null) {
1.50 + instance = createNewInstance();
1.51 + CACHE.put(tccl, instance);
1.52 + }
1.53 + return instance;
1.54 + }
1.55 +
1.56 + public void set(V instance) {
1.57 + CACHE.put(getContextClassLoader(), instance);
1.58 + }
1.59 +
1.60 + protected abstract V initialValue() throws Exception;
1.61 +
1.62 + private V createNewInstance() {
1.63 + try {
1.64 + return initialValue();
1.65 + } catch (Exception e) {
1.66 + throw new Error(format(FAILED_TO_CREATE_NEW_INSTANCE, getClass().getName()), e);
1.67 + }
1.68 + }
1.69 +
1.70 + private static String format(String property, Object... args) {
1.71 + String text = ResourceBundle.getBundle(ContextClassloaderLocal.class.getName()).getString(property);
1.72 + return MessageFormat.format(text, args);
1.73 + }
1.74 +
1.75 + private static ClassLoader getContextClassLoader() {
1.76 + return (ClassLoader)
1.77 + AccessController.doPrivileged(new PrivilegedAction() {
1.78 + public Object run() {
1.79 + ClassLoader cl = null;
1.80 + try {
1.81 + cl = Thread.currentThread().getContextClassLoader();
1.82 + } catch (SecurityException ex) {
1.83 + }
1.84 + return cl;
1.85 + }
1.86 + });
1.87 + }
1.88 +}
1.89 +
