1/*
2 * Copyright (c) 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/*
25 * @test
26 * @run main NoName
27 * @summary The reflection API should report parameters with no name properly.
28 */
29import java.lang.Class;
30import java.lang.reflect.Method;
31import java.lang.reflect.Parameter;
32import java.lang.reflect.MalformedParametersException;
33import java.lang.ClassLoader;
34import java.lang.ClassNotFoundException;
35import java.io.File;
36import java.io.FileOutputStream;
37import java.io.IOException;
38
39public class NoName {
40
41    private static final byte[] NoName_bytes = {
42        -54,-2,-70,-66,0,0,0,52,
43        0,18,10,0,3,0,15,7,
44        0,16,7,0,17,1,0,6,
45        60,105,110,105,116,62,1,0,
46        3,40,41,86,1,0,4,67,
47        111,100,101,1,0,15,76,105,
48        110,101,78,117,109,98,101,114,
49        84,97,98,108,101,1,0,1,
50        109,1,0,5,40,73,73,41,
51        86,1,0,16,77,101,116,104,
52        111,100,80,97,114,97,109,101,
53        116,101,114,115,1,0,0,1,
54        0,1,98,1,0,10,83,111,
55        117,114,99,101,70,105,108,101,
56        1,0,14,69,109,112,116,121,
57        78,97,109,101,46,106,97,118,
58        97,12,0,4,0,5,1,0,
59        9,69,109,112,116,121,78,97,
60        109,101,1,0,16,106,97,118,
61        97,47,108,97,110,103,47,79,
62        98,106,101,99,116,0,33,0,
63        2,0,3,0,0,0,0,0,
64        2,0,1,0,4,0,5,0,
65        1,0,6,0,0,0,29,0,
66        1,0,1,0,0,0,5,42,
67        -73,0,1,-79,0,0,0,1,
68        0,7,0,0,0,6,0,1,
69        0,0,0,1,0,1,0,8,
70        0,9,0,2,0,6,0,0,
71        0,25,0,0,0,3,0,0,
72        0,1,-79,0,0,0,1,0,
73        7,0,0,0,6,0,1,0,
74        0,0,2,
75        // Method Parameters attribute here
76        0,10,
77        // attribute_length
78        0,0,0,9,
79        // parameter_count
80        2,
81        // first parameter name
82        0,0,
83        // first parameter modifiers
84        0,0,
85        // second parameter name
86        0,12,
87        // second parameter modifiers
88        0,0,
89        // end attribute
90        0,1,0,13,0,0,0,2,0,14
91    };
92
93    private static class InMemoryClassLoader extends ClassLoader {
94        public Class<?> defineClass(String name, byte[] b) {
95            return defineClass(name, b, 0, b.length);
96        }
97    };
98
99    private static final InMemoryClassLoader loader = new InMemoryClassLoader();
100
101    private final Class<?> noName;
102
103    private NoName() throws ClassNotFoundException {
104        noName = loader.defineClass("EmptyName", NoName_bytes);
105    }
106
107    public static void main(String... args)
108        throws NoSuchMethodException, IOException, ClassNotFoundException {
109        new NoName().run();
110    }
111
112    public void run() throws NoSuchMethodException {
113        final Class<?> cls = noName;
114        System.err.println("Trying " + cls);
115        final Method method = cls.getMethod("m", int.class, int.class);
116        final Parameter[] params = method.getParameters();
117        System.err.println("Name " + params[0].getName());
118        System.err.println("Name " + params[1].getName());
119    }
120
121}
122