| /* |
| * Copyright (c) 2016, 2017, 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 javax.xml.soap; |
| |
| import java.util.ServiceLoader; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Shared ServiceLoader/FactoryFinder Utils shared among SAAJ, JAXB and JAXWS |
| * Class duplicated to all those projects. |
| * |
| * @author Miroslav.Kos@oracle.com |
| */ |
| class ServiceLoaderUtil { |
| |
| static <P, T extends Exception> P firstByServiceLoader(Class<P> spiClass, |
| Logger logger, |
| ExceptionHandler<T> handler) throws T { |
| logger.log(Level.FINE, "Using java.util.ServiceLoader to find {0}", spiClass.getName()); |
| // service discovery |
| try { |
| ServiceLoader<P> serviceLoader = ServiceLoader.load(spiClass); |
| |
| for (P impl : serviceLoader) { |
| logger.log(Level.FINE, "ServiceProvider loading Facility used; returning object [{0}]", 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, ClassLoader classLoader, |
| final ExceptionHandler<T> handler) throws T { |
| try { |
| return safeLoadClass(className, defaultImplClassName, classLoader).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 { |
| |
| 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 <T extends Exception> ClassLoader contextClassLoader(ExceptionHandler<T> exceptionHandler) throws T { |
| 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); |
| |
| } |
| |
| } |