Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 2005, 2011, 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.ws.spi;

 import java.io.InputStream;

 import java.io.File;

 import java.io.FileInputStream;

 import java.util.Properties;

 import java.io.BufferedReader;

 import java.io.InputStreamReader;

 import javax.xml.ws.WebServiceException;

 class FactoryFinder {

     /**

      * Creates an instance of the specified class using the specified

      * <code>ClassLoader</code> object.

      *

      * @exception WebServiceException if the given class could not be found

      *            or could not be instantiated

      */

     private static Object newInstance(String className,

                                       ClassLoader classLoader)

     {

         try {

             Class spiClass = safeLoadClass(className, classLoader);

             return spiClass.newInstance();

         } catch (ClassNotFoundException x) {

             throw new WebServiceException(

                 "Provider " + className + " not found", x);

         } catch (Exception x) {

             throw new WebServiceException(

                 "Provider " + className + " could not be instantiated: " + x,

                 x);

         }

     }

     /**

      * 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 not 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 WebServiceException if there is an error

      */

     static Object find(String factoryId, String fallbackClassName)

     {

         if (isOsgi()) {

             return lookupUsingOSGiServiceLoader(factoryId);

         }

         ClassLoader classLoader;

         try {

             classLoader = Thread.currentThread().getContextClassLoader();

         } catch (Exception x) {

             throw new WebServiceException(x.toString(), x);

         }

         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 ) {

         }

         // try to read from $java.home/lib/jaxws.properties

         try {

             String javah=System.getProperty( "java.home" );

             String configFile = javah + File.separator +

                 "lib" + File.separator + "jaxws.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 ) {

         }

         // Use the system property

         try {

             String systemProp =

                 System.getProperty( factoryId );

             if( systemProp!=null) {

                 return newInstance(systemProp, classLoader);

             }

         } catch (SecurityException se) {

         }

         if (fallbackClassName == null) {

             throw new WebServiceException(

                 "Provider for " + factoryId + " cannot be found", null);

         }

         return newInstance(fallbackClassName, classLoader);

     }

     /**

      * Loads the class, provided that the calling thread has an access to the class being loaded.

      */

     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) {

             // anyone can access the platform default factory class without permission

             if (Provider.DEFAULT_JAXWSPROVIDER.equals(className))

                 return Class.forName(className);

             throw se;

         }

     }

     private static final String OSGI_SERVICE_LOADER_CLASS_NAME = "com.sun.org.glassfish.hk2.osgiresourcelocator.ServiceLoader";

     private static boolean isOsgi() {

         try {

             Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);

             return true;

         } catch (ClassNotFoundException cnfe) {

         }

         return false;

     }

     private static Object lookupUsingOSGiServiceLoader(String factoryId) {

         try {

             // Use reflection to avoid having any dependendcy on ServiceLoader class

             Class serviceClass = Class.forName(factoryId);

             Class[] args = new Class[]{serviceClass};

             Class target = Class.forName(OSGI_SERVICE_LOADER_CLASS_NAME);

             java.lang.reflect.Method m = target.getMethod("lookupProviderInstances", Class.class);

             java.util.Iterator iter = ((Iterable) m.invoke(null, args)).iterator();

             return iter.hasNext() ? iter.next() : null;

         } catch (Exception e) {

             // log and continue

             return null;

         }

     }

 }