| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
| * |
| * Copyright (c) 2015-2017 Oracle and/or its affiliates. All rights reserved. |
| * |
| * The contents of this file are subject to the terms of either the GNU |
| * General Public License Version 2 only ("GPL") or the Common Development |
| * and Distribution License("CDDL") (collectively, the "License"). You |
| * may not use this file except in compliance with the License. You can |
| * obtain a copy of the License at |
| * https://oss.oracle.com/licenses/CDDL+GPL-1.1 |
| * or LICENSE.txt. See the License for the specific |
| * language governing permissions and limitations under the License. |
| * |
| * When distributing the software, include this License Header Notice in each |
| * file and include the License file at LICENSE.txt. |
| * |
| * GPL Classpath Exception: |
| * Oracle designates this particular file as subject to the "Classpath" |
| * exception as provided by Oracle in the GPL Version 2 section of the License |
| * file that accompanied this code. |
| * |
| * Modifications: |
| * If applicable, add the following below the License Header, with the fields |
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| */ |
| |
| package javax.xml.bind; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.Iterator; |
| import java.util.ServiceLoader; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Shared ServiceLoader/FactoryFinder Utils shared among SAAJ, JAXB and JAXWS |
| * - this class must be duplicated to all those projects, but it's |
| * basically generic code and we want to have it everywhere same. |
| * |
| * @author Miroslav.Kos@oracle.com |
| */ |
| class ServiceLoaderUtil { |
| |
| |
| static <P, T extends Exception> P firstByServiceLoader(Class<P> spiClass, |
| Logger logger, |
| ExceptionHandler<T> handler) throws T { |
| // service discovery |
| try { |
| ServiceLoader<P> serviceLoader = ServiceLoader.load(spiClass); |
| |
| for (P impl : serviceLoader) { |
| logger.fine("ServiceProvider loading Facility used; returning object [" + |
| impl.getClass().getName() + "]"); |
| |
| return impl; |
| } |
| } catch (Throwable t) { |
| throw handler.createException(t, "Error while searching for service [" + spiClass.getName() + "]"); |
| } |
| return null; |
| } |
| |
| static void checkPackageAccess(String className) { |
| // make sure that the current thread has an access to the package of the given name. |
| SecurityManager s = System.getSecurityManager(); |
| if (s != null) { |
| int i = className.lastIndexOf('.'); |
| if (i != -1) { |
| s.checkPackageAccess(className.substring(0, i)); |
| } |
| } |
| } |
| |
| static Class nullSafeLoadClass(String className, ClassLoader classLoader) throws ClassNotFoundException { |
| if (classLoader == null) { |
| return Class.forName(className); |
| } else { |
| return classLoader.loadClass(className); |
| } |
| } |
| |
| // Returns instance of required class. It checks package access (security) |
| // unless it is defaultClassname. It means if you are trying to instantiate |
| // default implementation (fallback), pass the class name to both first and second parameter. |
| static <T extends Exception> Object newInstance(String className, |
| String defaultImplClassName, |
| final ExceptionHandler<T> handler) throws T { |
| try { |
| return safeLoadClass(className, defaultImplClassName, contextClassLoader(handler)).newInstance(); |
| } catch (ClassNotFoundException x) { |
| throw handler.createException(x, "Provider " + className + " not found"); |
| } catch (Exception x) { |
| throw handler.createException(x, "Provider " + className + " could not be instantiated: " + x); |
| } |
| } |
| |
| static Class safeLoadClass(String className, |
| String defaultImplClassName, |
| ClassLoader classLoader) throws ClassNotFoundException { |
| // using OSGi locator to load the spi class |
| try { |
| Class spiClass = org.apache.servicemix.specs.locator.OsgiLocator.locate(JAXBContext.class); |
| if (spiClass != null) { |
| return spiClass; |
| } |
| } catch (Throwable t) { |
| } |
| |
| |
| try { |
| checkPackageAccess(className); |
| } catch (SecurityException se) { |
| // anyone can access the platform default factory class without permission |
| if (defaultImplClassName != null && defaultImplClassName.equals(className)) { |
| return Class.forName(className); |
| } |
| // not platform default implementation ... |
| throw se; |
| } |
| return nullSafeLoadClass(className, classLoader); |
| } |
| |
| static ClassLoader contextClassLoader(ExceptionHandler exceptionHandler) throws Exception { |
| try { |
| return Thread.currentThread().getContextClassLoader(); |
| } catch (Exception x) { |
| throw exceptionHandler.createException(x, x.toString()); |
| } |
| } |
| |
| static abstract class ExceptionHandler<T extends Exception> { |
| |
| public abstract T createException(Throwable throwable, String message); |
| |
| } |
| |
| } |