| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package javax.xml.ws.spi; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.security.PrivilegedAction; |
| import java.util.Properties; |
| |
| /** |
| * This code is designed to implement the pluggability |
| * feature and is designed to both compile and run on JDK version 1.1 and |
| * later. The code also runs both as part of an unbundled jar file and |
| * when bundled as part of the JDK. |
| * <p/> |
| * This class is duplicated for each subpackage so keep it in sync. |
| * It is package private and therefore is not exposed as part of the JAXRPC |
| * API. |
| */ |
| class FactoryFinder { |
| /** |
| * Set to true for debugging. |
| */ |
| private static final boolean debug = false; |
| |
| private static void debugPrintln(String msg) { |
| if (debug) { |
| System.err.println("Factory Finder:" + msg); |
| } |
| } |
| |
| /** |
| * Figure out which ClassLoader to use. For JDK 1.2 and later use |
| * the context ClassLoader. |
| * |
| * @return the <code>ClassLoader</code> |
| * @throws ConfigurationError if this class is unable to work with the |
| * host JDK |
| */ |
| private static ClassLoader findClassLoader() |
| throws ConfigurationError { |
| // REVIEW This doPriv block may be unnecessary because this method is private and |
| // the caller already has a doPriv. I added the doPriv in case someone changes the |
| // visibility of this method to non-private. |
| ClassLoader cl = (ClassLoader) |
| doPrivileged( new PrivilegedAction() { |
| public Object run() { |
| |
| Method m = null; |
| |
| try { |
| |
| m = Thread.class.getMethod("getContextClassLoader", (Class []) null); |
| } catch (NoSuchMethodException e) { |
| // Assume that we are running JDK 1.1, use the current ClassLoader |
| debugPrintln("assuming JDK 1.1"); |
| if (FactoryFinder.class.getClassLoader() == null) { |
| return ClassLoader.getSystemClassLoader(); |
| } |
| return FactoryFinder.class.getClassLoader(); |
| } |
| |
| try { |
| return (ClassLoader) m.invoke(Thread.currentThread(), (Object []) null); |
| } catch (IllegalAccessException e) { |
| // assert(false) |
| throw new ConfigurationError("Unexpected IllegalAccessException", |
| e); |
| } catch (InvocationTargetException e) { |
| // assert(e.getTargetException() instanceof SecurityException) |
| throw new ConfigurationError("Unexpected InvocationTargetException", |
| e); |
| } |
| } |
| } |
| ); |
| return cl; |
| |
| } |
| |
| /** |
| * Create an instance of a class using the specified |
| * <code>ClassLoader</code>, or if that fails from the |
| * <code>ClassLoader</code> that loaded this class. |
| * |
| * @param className the name of the class to instantiate |
| * @param classLoader a <code>ClassLoader</code> to load the class from |
| * @return a new <code>Object</code> that is an instance of the class of |
| * the given name from the given class loader |
| * @throws ConfigurationError if the class could not be found or |
| * instantiated |
| */ |
| private static Object newInstance(String className, |
| ClassLoader classLoader) |
| throws ConfigurationError { |
| |
| final ClassLoader iClassLoader = classLoader; |
| final String iClassName = className; |
| |
| // REVIEW This doPriv block may be unnecessary because this method is private and |
| // the caller already has a doPriv. I added the doPriv in case someone changes the |
| // visibility of this method to non-private. |
| Object obj = |
| doPrivileged( new PrivilegedAction() { |
| public Object run() { |
| try { |
| if (iClassLoader != null) { |
| try { |
| return iClassLoader.loadClass(iClassName).newInstance(); |
| } catch (ClassNotFoundException x) { |
| // try again |
| } |
| } |
| return Class.forName(iClassName).newInstance(); |
| } catch (ClassNotFoundException x) { |
| throw new ConfigurationError( |
| "Provider " + iClassName + " not found", x); |
| } catch (Exception x) { |
| throw new ConfigurationError( |
| "Provider " + iClassName + " could not be instantiated: " + x, |
| x); |
| } |
| } |
| }); |
| return obj; |
| } |
| |
| /** |
| * Finds the implementation Class object in the specified order. Main |
| * entry point. |
| * |
| * @param factoryId Name of the factory to find, same as |
| * a property name |
| * @param fallbackClassName Implementation class name, if nothing else |
| * is found. Use null to mean no fallback. |
| * @return Class object of factory, never null |
| * @throws FactoryFinder.ConfigurationError |
| * Package private so this code can be shared. |
| */ |
| static Object find(String factoryId, String fallbackClassName) |
| throws ConfigurationError { |
| |
| final String iFactoryId = factoryId; |
| final String iFallbackClassName = fallbackClassName; |
| |
| Object obj = |
| doPrivileged( new PrivilegedAction() { |
| public Object run() { |
| debugPrintln("debug is on"); |
| |
| ClassLoader classLoader = findClassLoader(); |
| |
| try { |
| // If we are deployed into an OSGi environment, leverage it |
| Class factoryClass; |
| if (FactoryFinder.class.getClassLoader() == null) { |
| factoryClass = Class.forName(iFactoryId); |
| } else { |
| factoryClass = FactoryFinder.class.getClassLoader().loadClass(iFactoryId); |
| } |
| Class spiClass = org.apache.servicemix.specs.locator.OsgiLocator.locate(factoryClass, iFactoryId); |
| if (spiClass != null) { |
| return spiClass.newInstance(); |
| } |
| } catch (Throwable e) { |
| } |
| |
| // Use the system property first |
| try { |
| String systemProp = |
| System.getProperty(iFactoryId); |
| if (systemProp != null) { |
| debugPrintln("found system property " + systemProp); |
| return newInstance(systemProp, classLoader); |
| } |
| } catch (SecurityException se) { |
| } |
| |
| // try to read from $java.home/lib/xml.properties |
| try { |
| String javah = System.getProperty("java.home"); |
| String configFile = javah + File.separator + |
| "lib" + File.separator + "jaxrpc.properties"; |
| File f = new File(configFile); |
| if (f.exists()) { |
| Properties props = new Properties(); |
| props.load(new FileInputStream(f)); |
| String factoryClassName = props.getProperty(iFactoryId); |
| debugPrintln("found java.home property " + factoryClassName); |
| return newInstance(factoryClassName, classLoader); |
| } |
| } catch (Exception ex) { |
| if (debug) ex.printStackTrace(); |
| } |
| |
| String serviceId = "META-INF/services/" + iFactoryId; |
| // try to find services in CLASSPATH |
| try { |
| InputStream is = null; |
| if (classLoader == null) { |
| is = ClassLoader.getSystemResourceAsStream(serviceId); |
| } else { |
| is = classLoader.getResourceAsStream(serviceId); |
| } |
| |
| if (is != null) { |
| debugPrintln("found " + serviceId); |
| |
| // Read the service provider name in UTF-8 as specified in |
| // the jar spec. Unfortunately this fails in Microsoft |
| // VJ++, which does not implement the UTF-8 |
| // encoding. Theoretically, we should simply let it fail in |
| // that case, since the JVM is obviously broken if it |
| // doesn't support such a basic standard. But since there |
| // are still some users attempting to use VJ++ for |
| // development, we have dropped in a fallback which makes a |
| // second attempt using the platform's default encoding. In |
| // VJ++ this is apparently ASCII, which is a subset of |
| // UTF-8... and since the strings we'll be reading here are |
| // also primarily limited to the 7-bit ASCII range (at |
| // least, in English versions), this should work well |
| // enough to keep us on the air until we're ready to |
| // officially decommit from VJ++. [Edited comment from |
| // jkesselm] |
| BufferedReader rd; |
| try { |
| rd = new BufferedReader(new InputStreamReader(is, "UTF-8")); |
| } catch (java.io.UnsupportedEncodingException e) { |
| rd = new BufferedReader(new InputStreamReader(is)); |
| } |
| |
| String factoryClassName = rd.readLine(); |
| rd.close(); |
| |
| if (factoryClassName != null && |
| ! "".equals(factoryClassName)) { |
| debugPrintln("loaded from services: " + factoryClassName); |
| return newInstance(factoryClassName, classLoader); |
| } |
| } |
| } catch (Exception ex) { |
| if (debug) ex.printStackTrace(); |
| } |
| |
| if (iFallbackClassName == null) { |
| throw new ConfigurationError( |
| "Provider for " + iFactoryId + " cannot be found", null); |
| } |
| |
| debugPrintln("loaded from fallback value: " + iFallbackClassName); |
| return newInstance(iFallbackClassName, classLoader); |
| } |
| }); |
| return obj; |
| } |
| |
| private static Object doPrivileged(PrivilegedAction action) { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm == null) { |
| return(action.run()); |
| } else { |
| return java.security.AccessController.doPrivileged(action); |
| } |
| } |
| |
| static class ConfigurationError extends Error { |
| // fixme: should this be refactored to use the jdk1.4 exception |
| // wrapping? |
| |
| private Exception exception; |
| |
| /** |
| * Construct a new instance with the specified detail string and |
| * exception. |
| * |
| * @param msg the Message for this error |
| * @param x an Exception that caused this failure, or null |
| */ |
| ConfigurationError(String msg, Exception x) { |
| super(msg); |
| this.exception = x; |
| } |
| |
| Exception getException() { |
| return exception; |
| } |
| } |
| } |