1 /*
   2  * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.lang.reflect.InvocationTargetException;
  25 import java.net.URL;
  26 import java.net.URLStreamHandler;
  27 import java.net.URLStreamHandlerFactory;
  28 
  29 /*
  30  * @test
  31  * @bug 4135031
  32  * @summary Test bootstrap problem when a URLStreamHandlerFactory is loaded
  33  *          by the application class loader.
  34  * @modules java.base/sun.net.www.protocol.file
  35  * @run main HandlerLoop
  36  */
  37 public class HandlerLoop {
  38 
  39     public static void main(String args[]) throws Exception {
  40         URL.setURLStreamHandlerFactory(
  41             new HandlerFactory("sun.net.www.protocol"));
  42         URL url = new URL("file:///bogus/index.html");
  43         System.out.println("url = " + url);
  44         url.openConnection();
  45     }
  46 
  47     private static class HandlerFactory implements URLStreamHandlerFactory {
  48         private String pkg;
  49 
  50         HandlerFactory(String pkg) {
  51             this.pkg = pkg;
  52         }
  53 
  54         public URLStreamHandler createURLStreamHandler(String protocol) {
  55             String name = pkg + "." + protocol + ".Handler";
  56             System.out.println("Loading handler class: " + name);
  57             // Loading this dummy class demonstrates the bootstrap
  58             // problem as the stream handler factory will be reentered
  59             // over and over again if the application class loader
  60             // shares the same stream handler factory.
  61             new Dummy();
  62             try {
  63                 Class<?> c = Class.forName(name);
  64                 return (URLStreamHandler)c.getDeclaredConstructor().newInstance();
  65             } catch (ClassNotFoundException |
  66                     IllegalAccessException |
  67                     InstantiationException |
  68                     NoSuchMethodException |
  69                     InvocationTargetException e) {
  70                 e.printStackTrace();
  71             }
  72             return null;
  73         }
  74     }
  75 
  76     private static class Dummy {
  77     }
  78 }