aoqi@0: /* aoqi@0: * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. Oracle designates this aoqi@0: * particular file as subject to the "Classpath" exception as provided aoqi@0: * by Oracle in the LICENSE file that accompanied this code. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: */ aoqi@0: aoqi@0: package com.sun.xml.internal.ws.spi; aoqi@0: aoqi@0: import java.security.AccessController; aoqi@0: import java.security.PrivilegedAction; aoqi@0: import java.text.MessageFormat; aoqi@0: import java.util.ResourceBundle; aoqi@0: import java.util.WeakHashMap; aoqi@0: aoqi@0: /** aoqi@0: * Simple utility ensuring that the value is cached only in case it is non-internal implementation aoqi@0: */ aoqi@0: abstract class ContextClassloaderLocal { aoqi@0: aoqi@0: private static final String FAILED_TO_CREATE_NEW_INSTANCE = "FAILED_TO_CREATE_NEW_INSTANCE"; aoqi@0: aoqi@0: private WeakHashMap CACHE = new WeakHashMap(); aoqi@0: aoqi@0: public V get() throws Error { aoqi@0: ClassLoader tccl = getContextClassLoader(); aoqi@0: V instance = CACHE.get(tccl); aoqi@0: if (instance == null) { aoqi@0: instance = createNewInstance(); aoqi@0: CACHE.put(tccl, instance); aoqi@0: } aoqi@0: return instance; aoqi@0: } aoqi@0: aoqi@0: public void set(V instance) { aoqi@0: CACHE.put(getContextClassLoader(), instance); aoqi@0: } aoqi@0: aoqi@0: protected abstract V initialValue() throws Exception; aoqi@0: aoqi@0: private V createNewInstance() { aoqi@0: try { aoqi@0: return initialValue(); aoqi@0: } catch (Exception e) { aoqi@0: throw new Error(format(FAILED_TO_CREATE_NEW_INSTANCE, getClass().getName()), e); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: private static String format(String property, Object... args) { aoqi@0: String text = ResourceBundle.getBundle(ContextClassloaderLocal.class.getName()).getString(property); aoqi@0: return MessageFormat.format(text, args); aoqi@0: } aoqi@0: aoqi@0: private static ClassLoader getContextClassLoader() { aoqi@0: return (ClassLoader) aoqi@0: AccessController.doPrivileged(new PrivilegedAction() { aoqi@0: public Object run() { aoqi@0: ClassLoader cl = null; aoqi@0: try { aoqi@0: cl = Thread.currentThread().getContextClassLoader(); aoqi@0: } catch (SecurityException ex) { aoqi@0: } aoqi@0: return cl; aoqi@0: } aoqi@0: }); aoqi@0: } aoqi@0: } aoqi@0: