HandlerLoop.java revision 9330:8b1f1c2a400f 
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
24import java.io.*;
25/*
26 * @test
27 * @bug 4135031
28 * @summary Test boostrap problem when a URLStreamHandlerFactory is loaded
29 *          by the application class loader.
30 *
31 */
32import java.net.*;
33
34public class HandlerLoop {
35
36    public static void main(String args[]) throws Exception {
37        URL.setURLStreamHandlerFactory(
38            new HandlerFactory("sun.net.www.protocol"));
39        URL url = new URL("file:///bogus/index.html");
40        System.out.println("url = " + url);
41        url.openConnection();
42    }
43
44    private static class HandlerFactory implements URLStreamHandlerFactory {
45        private String pkg;
46
47        HandlerFactory(String pkg) {
48            this.pkg = pkg;
49        }
50
51        public URLStreamHandler createURLStreamHandler(String protocol) {
52            String name = pkg + "." + protocol + ".Handler";
53            System.out.println("Loading handler class: " + name);
54            // Loading this dummy class demonstrates the bootstrap
55            // problem as the stream handler factory will be reentered
56            // over and over again if the application class loader
57            // shares the same stream handler factory.
58            new Dummy();
59            try {
60                Class c = Class.forName(name);
61                return (URLStreamHandler)c.newInstance();
62            } catch (ClassNotFoundException e) {
63                e.printStackTrace();
64            } catch (IllegalAccessException e) {
65                e.printStackTrace();
66            } catch (InstantiationException e) {
67                e.printStackTrace();
68            }
69            return null;
70        }
71    }
72
73    private static class Dummy {
74    }
75}
76