| /* |
| * Copyright (c) 2004, 2013, 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.io.*; |
| import java.util.Properties; |
| |
| |
| class FactoryFinder { |
| |
| /** |
| * Creates an instance of the specified class using the specified |
| * <code>ClassLoader</code> object. |
| * |
| * @exception SOAPException if the given class could not be found |
| * or could not be instantiated |
| */ |
| private static Object newInstance(String className, |
| ClassLoader classLoader) |
| throws SOAPException |
| { |
| try { |
| Class spiClass = safeLoadClass(className, classLoader); |
| return spiClass.newInstance(); |
| |
| } catch (ClassNotFoundException x) { |
| throw new SOAPException("Provider " + className + " not found", x); |
| } catch (Exception x) { |
| throw new SOAPException("Provider " + className + " could not be instantiated: " + x, x); |
| } |
| } |
| |
| /** |
| * Finds the implementation <code>Class</code> object for the given |
| * factory name, or null if that fails. |
| * <P> |
| * This method is package private so that this code can be shared. |
| * |
| * @return the <code>Class</code> object of the specified message factory; |
| * or <code>null</code> |
| * |
| * @param factoryId the name of the factory to find, which is |
| * a system property |
| * @exception SOAPException if there is a SOAP error |
| */ |
| static Object find(String factoryId) |
| throws SOAPException |
| { |
| return find(factoryId, null, false); |
| } |
| |
| /** |
| * Finds the implementation <code>Class</code> object for the given |
| * factory name, or if that fails, finds the <code>Class</code> object |
| * for the given fallback class name. The arguments supplied must be |
| * used in order. If using the first argument is successful, the second |
| * one will not be used. |
| * <P> |
| * This method is package private so that this code can be shared. |
| * |
| * @return the <code>Class</code> object of the specified message factory; |
| * may be <code>null</code> |
| * |
| * @param factoryId the name of the factory to find, which is |
| * a system property |
| * @param fallbackClassName the implementation class name, which is |
| * to be used only if nothing else |
| * is found; <code>null</code> to indicate that |
| * there is no fallback class name |
| * @exception SOAPException if there is a SOAP error |
| */ |
| static Object find(String factoryId, String fallbackClassName) |
| throws SOAPException |
| { |
| return find(factoryId, fallbackClassName, true); |
| } |
| |
| /** |
| * Finds the implementation <code>Class</code> object for the given |
| * factory name, or if that fails, finds the <code>Class</code> object |
| * for the given default class name, but only if <code>tryFallback</code> |
| * is <code>true</code>. The arguments supplied must be used in order |
| * If using the first argument is successful, the second one will not |
| * be used. Note the default class name may be needed even if fallback |
| * is not to be attempted, so certain error conditions can be handled. |
| * <P> |
| * This method is package private so that this code can be shared. |
| * |
| * @return the <code>Class</code> object of the specified message factory; |
| * may not be <code>null</code> |
| * |
| * @param factoryId the name of the factory to find, which is |
| * a system property |
| * @param defaultClassName the implementation class name, which is |
| * to be used only if nothing else |
| * is found; <code>null</code> to indicate |
| * that there is no default class name |
| * @param tryFallback whether to try the default class as a |
| * fallback |
| * @exception SOAPException if there is a SOAP error |
| */ |
| static Object find(String factoryId, String defaultClassName, |
| boolean tryFallback) throws SOAPException { |
| ClassLoader classLoader; |
| try { |
| classLoader = Thread.currentThread().getContextClassLoader(); |
| } catch (Exception x) { |
| throw new SOAPException(x.toString(), x); |
| } |
| |
| // Use the system property first |
| try { |
| String systemProp = |
| System.getProperty( factoryId ); |
| if( systemProp!=null) { |
| return newInstance(systemProp, classLoader); |
| } |
| } catch (SecurityException se) { |
| } |
| |
| // try to read from $java.home/lib/jaxm.properties |
| try { |
| String javah=System.getProperty( "java.home" ); |
| String configFile = javah + File.separator + |
| "lib" + File.separator + "jaxm.properties"; |
| File f=new File( configFile ); |
| if( f.exists()) { |
| Properties props=new Properties(); |
| props.load( new FileInputStream(f)); |
| String factoryClassName = props.getProperty(factoryId); |
| return newInstance(factoryClassName, classLoader); |
| } |
| } catch(Exception ex ) { |
| } |
| |
| String serviceId = "META-INF/services/" + factoryId; |
| // 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 ) { |
| BufferedReader rd = |
| new BufferedReader(new InputStreamReader(is, "UTF-8")); |
| |
| String factoryClassName = rd.readLine(); |
| rd.close(); |
| |
| if (factoryClassName != null && |
| ! "".equals(factoryClassName)) { |
| return newInstance(factoryClassName, classLoader); |
| } |
| } |
| } catch( Exception ex ) { |
| } |
| |
| // If not found and fallback should not be tried, return a null result. |
| if (!tryFallback) |
| return null; |
| |
| // We didn't find the class through the usual means so try the default |
| // (built in) factory if specified. |
| if (defaultClassName == null) { |
| throw new SOAPException( |
| "Provider for " + factoryId + " cannot be found", null); |
| } |
| return newInstance(defaultClassName, classLoader); |
| } |
| |
| /** |
| * Loads the class, provided that the calling thread has an access to the |
| * class being loaded. If this is the specified default factory class and it |
| * is restricted by package.access we get a SecurityException and can do a |
| * Class.forName() on it so it will be loaded by the bootstrap class loader. |
| */ |
| private static Class safeLoadClass(String className, |
| ClassLoader classLoader) |
| throws ClassNotFoundException { |
| try { |
| // 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)); |
| } |
| } |
| |
| if (classLoader == null) |
| return Class.forName(className); |
| else |
| return classLoader.loadClass(className); |
| } catch (SecurityException se) { |
| // (only) default implementation can be loaded |
| // using bootstrap class loader: |
| if (isDefaultImplementation(className)) |
| return Class.forName(className); |
| |
| throw se; |
| } |
| } |
| |
| private static boolean isDefaultImplementation(String className) { |
| return MessageFactory.DEFAULT_MESSAGE_FACTORY.equals(className) || |
| SOAPFactory.DEFAULT_SOAP_FACTORY.equals(className) || |
| SOAPConnectionFactory.DEFAULT_SOAP_CONNECTION_FACTORY.equals(className) || |
| SAAJMetaFactory.DEFAULT_META_FACTORY_CLASS.equals(className); |
| } |
| } |