/* * Copyright (c) 2015, 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.bind; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.security.AccessController; import java.security.PrivilegedAction; import java.util.Iterator; import java.util.Properties; 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 { private static final String OSGI_SERVICE_LOADER_CLASS_NAME = "com.sun.org.glassfish.hk2.osgiresourcelocator.ServiceLoader"; private static final String OSGI_SERVICE_LOADER_METHOD_NAME = "lookupProviderClasses"; static
P firstByServiceLoader(Class
spiClass, Logger logger, ExceptionHandler 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 boolean isOsgi(Logger logger) {
try {
Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);
return true;
} catch (ClassNotFoundException ignored) {
logger.log(Level.FINE, "OSGi classes not found, OSGi not available.", ignored);
}
return false;
}
static Object lookupUsingOSGiServiceLoader(String factoryId, Logger logger) {
try {
// Use reflection to avoid having any dependendcy on ServiceLoader class
Class serviceClass = Class.forName(factoryId);
Class target = Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);
Method m = target.getMethod(OSGI_SERVICE_LOADER_METHOD_NAME, Class.class);
Iterator iter = ((Iterable) m.invoke(null, serviceClass)).iterator();
if (iter.hasNext()) {
Object next = iter.next();
logger.fine("Found implementation using OSGi facility; returning object [" + next.getClass().getName() + "].");
return next;
} else {
return null;
}
} catch (IllegalAccessException | InvocationTargetException | ClassNotFoundException | NoSuchMethodException ignored) {
logger.log(Level.FINE, "Unable to find from OSGi: [" + factoryId + "]", ignored);
return null;
}
}
static String propertyFileLookup(final String configFullPath, final String factoryId) throws IOException {
File f = new File(configFullPath);
String factoryClassName = null;
if (f.exists()) {
Properties props = new Properties();
FileInputStream stream = null;
try {
stream = new FileInputStream(f);
props.load(stream);
factoryClassName = props.getProperty(factoryId);
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException ignored) {
}
}
}
}
return factoryClassName;
}
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.
*
* @param className class to be instantiated
* @param isDefaultClassname says whether default implementation class
* @param handler exception handler - necessary for wrapping exceptions and logging
* @param