1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/javax/xml/ws/spi/FactoryFinder.java Tue Mar 06 16:09:35 2012 -0800
1.3 @@ -0,0 +1,207 @@
1.4 +/*
1.5 + * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package javax.xml.ws.spi;
1.30 +
1.31 +import java.io.InputStream;
1.32 +import java.io.File;
1.33 +import java.io.FileInputStream;
1.34 +
1.35 +import java.util.Properties;
1.36 +import java.io.BufferedReader;
1.37 +import java.io.InputStreamReader;
1.38 +import javax.xml.ws.WebServiceException;
1.39 +
1.40 +class FactoryFinder {
1.41 +
1.42 + /**
1.43 + * Creates an instance of the specified class using the specified
1.44 + * <code>ClassLoader</code> object.
1.45 + *
1.46 + * @exception WebServiceException if the given class could not be found
1.47 + * or could not be instantiated
1.48 + */
1.49 + private static Object newInstance(String className,
1.50 + ClassLoader classLoader)
1.51 + {
1.52 + try {
1.53 + Class spiClass = safeLoadClass(className, classLoader);
1.54 + return spiClass.newInstance();
1.55 + } catch (ClassNotFoundException x) {
1.56 + throw new WebServiceException(
1.57 + "Provider " + className + " not found", x);
1.58 + } catch (Exception x) {
1.59 + throw new WebServiceException(
1.60 + "Provider " + className + " could not be instantiated: " + x,
1.61 + x);
1.62 + }
1.63 + }
1.64 +
1.65 + /**
1.66 + * Finds the implementation <code>Class</code> object for the given
1.67 + * factory name, or if that fails, finds the <code>Class</code> object
1.68 + * for the given fallback class name. The arguments supplied MUST be
1.69 + * used in order. If using the first argument is successful, the second
1.70 + * one will not be used.
1.71 + * <P>
1.72 + * This method is package private so that this code can be shared.
1.73 + *
1.74 + * @return the <code>Class</code> object of the specified message factory;
1.75 + * may not be <code>null</code>
1.76 + *
1.77 + * @param factoryId the name of the factory to find, which is
1.78 + * a system property
1.79 + * @param fallbackClassName the implementation class name, which is
1.80 + * to be used only if nothing else
1.81 + * is found; <code>null</code> to indicate that
1.82 + * there is no fallback class name
1.83 + * @exception WebServiceException if there is an error
1.84 + */
1.85 + static Object find(String factoryId, String fallbackClassName)
1.86 + {
1.87 + if (isOsgi()) {
1.88 + return lookupUsingOSGiServiceLoader(factoryId);
1.89 + }
1.90 + ClassLoader classLoader;
1.91 + try {
1.92 + classLoader = Thread.currentThread().getContextClassLoader();
1.93 + } catch (Exception x) {
1.94 + throw new WebServiceException(x.toString(), x);
1.95 + }
1.96 +
1.97 + String serviceId = "META-INF/services/" + factoryId;
1.98 + // try to find services in CLASSPATH
1.99 + try {
1.100 + InputStream is=null;
1.101 + if (classLoader == null) {
1.102 + is=ClassLoader.getSystemResourceAsStream(serviceId);
1.103 + } else {
1.104 + is=classLoader.getResourceAsStream(serviceId);
1.105 + }
1.106 +
1.107 + if( is!=null ) {
1.108 + BufferedReader rd =
1.109 + new BufferedReader(new InputStreamReader(is, "UTF-8"));
1.110 +
1.111 + String factoryClassName = rd.readLine();
1.112 + rd.close();
1.113 +
1.114 + if (factoryClassName != null &&
1.115 + ! "".equals(factoryClassName)) {
1.116 + return newInstance(factoryClassName, classLoader);
1.117 + }
1.118 + }
1.119 + } catch( Exception ex ) {
1.120 + }
1.121 +
1.122 +
1.123 + // try to read from $java.home/lib/jaxws.properties
1.124 + try {
1.125 + String javah=System.getProperty( "java.home" );
1.126 + String configFile = javah + File.separator +
1.127 + "lib" + File.separator + "jaxws.properties";
1.128 + File f=new File( configFile );
1.129 + if( f.exists()) {
1.130 + Properties props=new Properties();
1.131 + props.load( new FileInputStream(f));
1.132 + String factoryClassName = props.getProperty(factoryId);
1.133 + return newInstance(factoryClassName, classLoader);
1.134 + }
1.135 + } catch(Exception ex ) {
1.136 + }
1.137 +
1.138 +
1.139 + // Use the system property
1.140 + try {
1.141 + String systemProp =
1.142 + System.getProperty( factoryId );
1.143 + if( systemProp!=null) {
1.144 + return newInstance(systemProp, classLoader);
1.145 + }
1.146 + } catch (SecurityException se) {
1.147 + }
1.148 +
1.149 + if (fallbackClassName == null) {
1.150 + throw new WebServiceException(
1.151 + "Provider for " + factoryId + " cannot be found", null);
1.152 + }
1.153 +
1.154 + return newInstance(fallbackClassName, classLoader);
1.155 + }
1.156 +
1.157 +
1.158 + /**
1.159 + * Loads the class, provided that the calling thread has an access to the class being loaded.
1.160 + */
1.161 + private static Class safeLoadClass(String className, ClassLoader classLoader) throws ClassNotFoundException {
1.162 + try {
1.163 + // make sure that the current thread has an access to the package of the given name.
1.164 + SecurityManager s = System.getSecurityManager();
1.165 + if (s != null) {
1.166 + int i = className.lastIndexOf('.');
1.167 + if (i != -1) {
1.168 + s.checkPackageAccess(className.substring(0, i));
1.169 + }
1.170 + }
1.171 +
1.172 + if (classLoader == null)
1.173 + return Class.forName(className);
1.174 + else
1.175 + return classLoader.loadClass(className);
1.176 + } catch (SecurityException se) {
1.177 + // anyone can access the platform default factory class without permission
1.178 + if (Provider.DEFAULT_JAXWSPROVIDER.equals(className))
1.179 + return Class.forName(className);
1.180 + throw se;
1.181 + }
1.182 + }
1.183 +
1.184 + private static final String OSGI_SERVICE_LOADER_CLASS_NAME = "com.sun.org.glassfish.hk2.osgiresourcelocator.ServiceLoader";
1.185 +
1.186 + private static boolean isOsgi() {
1.187 + try {
1.188 + Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);
1.189 + return true;
1.190 + } catch (ClassNotFoundException cnfe) {
1.191 + }
1.192 + return false;
1.193 + }
1.194 +
1.195 + private static Object lookupUsingOSGiServiceLoader(String factoryId) {
1.196 + try {
1.197 + // Use reflection to avoid having any dependendcy on ServiceLoader class
1.198 + Class serviceClass = Class.forName(factoryId);
1.199 + Class[] args = new Class[]{serviceClass};
1.200 + Class target = Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);
1.201 + java.lang.reflect.Method m = target.getMethod("lookupProviderInstances", Class.class);
1.202 + java.util.Iterator iter = ((Iterable) m.invoke(null, args)).iterator();
1.203 + return iter.hasNext() ? iter.next() : null;
1.204 + } catch (Exception e) {
1.205 + // log and continue
1.206 + return null;
1.207 + }
1.208 + }
1.209 +
1.210 +}
