1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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22  */
23 
24 import 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  */
32 import java.net.*;
33 
34 public class HandlerLoop {
35 
main(String args[])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 
HandlerFactory(String pkg)47         HandlerFactory(String pkg) {
48             this.pkg = pkg;
49         }
50 
createURLStreamHandler(String protocol)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