diff -r 29a761eaff0d -r 6cd506508147 src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/ContextClassloaderLocal.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/ContextClassloaderLocal.java Fri Feb 14 11:13:45 2014 +0100 @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package com.sun.xml.internal.stream.buffer; + +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.text.MessageFormat; +import java.util.ResourceBundle; +import java.util.WeakHashMap; + +/** + * Simple utility ensuring that the value is cached only in case it is non-internal implementation + */ +abstract class ContextClassloaderLocal { + + private static final String FAILED_TO_CREATE_NEW_INSTANCE = "FAILED_TO_CREATE_NEW_INSTANCE"; + + private WeakHashMap CACHE = new WeakHashMap(); + + public V get() throws Error { + ClassLoader tccl = getContextClassLoader(); + V instance = CACHE.get(tccl); + if (instance == null) { + instance = createNewInstance(); + CACHE.put(tccl, instance); + } + return instance; + } + + public void set(V instance) { + CACHE.put(getContextClassLoader(), instance); + } + + protected abstract V initialValue() throws Exception; + + private V createNewInstance() { + try { + return initialValue(); + } catch (Exception e) { + throw new Error(format(FAILED_TO_CREATE_NEW_INSTANCE, getClass().getName()), e); + } + } + + private static String format(String property, Object... args) { + String text = ResourceBundle.getBundle(ContextClassloaderLocal.class.getName()).getString(property); + return MessageFormat.format(text, args); + } + + private static ClassLoader getContextClassLoader() { + return (ClassLoader) + AccessController.doPrivileged(new PrivilegedAction() { + public Object run() { + ClassLoader cl = null; + try { + cl = Thread.currentThread().getContextClassLoader(); + } catch (SecurityException ex) { + } + return cl; + } + }); + } +} +