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.
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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).
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22 */
23
24/* @test
25 * @bug 4258644
26 * @summary ObjectInputStream's default implementation of its protected
27 * resolveProxyClass method is specified to pass the first non-null class
28 * loader up the execution stack to the Proxy.getProxyClass method when
29 * it creates the specified proxy class; this test makes sure that it does
30 * that in situations where it hadn't in the past, such as if the defining
31 * loaders of the interfaces were all strict ancestors of the first
32 * non-null loader up the stack.
33 * @author Peter Jones
34 *
35 * @build ResolveProxyClass
36 * @run main ResolveProxyClass
37 */
38
39import java.lang.reflect.*;
40import java.io.*;
41
42public class ResolveProxyClass {
43
44    /*
45     * This class is a dummy ObjectInputStream subclass that allows the
46     * test code to access ObjectInputStream's protected resolveProxyClass
47     * method directly.
48     */
49    private static class TestObjectInputStream extends ObjectInputStream {
50
51        TestObjectInputStream() throws IOException {
52            super();
53        }
54
55        protected Class resolveProxyClass(String[] interfaces)
56            throws IOException, ClassNotFoundException
57        {
58            return super.resolveProxyClass(interfaces);
59        }
60    }
61
62    public static void main(String[] args) {
63
64        System.err.println("\nRegression test for bug 4258644\n");
65
66        try {
67
68            /*
69             * Set this thread's context class loader to null, so that the
70             * resolveProxyClass implementation cannot cheat by guessing that
71             * the context class loader is the appropriate loader to pass to
72             * the Proxy.getProxyClass method.
73             */
74            Thread.currentThread().setContextClassLoader(null);
75
76            /*
77             * Expect the proxy class to be defined in the system class
78             * loader, because that is the defining loader of this test
79             * code, and it should be the first loader on the stack when
80             * ObjectInputStream.resolveProxyClass gets executed.
81             */
82            ClassLoader expectedLoader = ResolveProxyClass.class.getClassLoader();
83
84            TestObjectInputStream in = new TestObjectInputStream();
85            Class proxyClass = in.resolveProxyClass(
86                new String[] { Runnable.class.getName() });
87            ClassLoader proxyLoader = proxyClass.getClassLoader();
88            System.err.println("proxy class \"" + proxyClass +
89                "\" defined in loader: " + proxyLoader);
90
91            if (proxyLoader != expectedLoader) {
92                throw new RuntimeException(
93                    "proxy class defined in loader: " + proxyLoader);
94            }
95
96            System.err.println("\nTEST PASSED");
97
98        } catch (Throwable e) {
99            System.err.println("\nTEST FAILED:");
100            e.printStackTrace();
101            throw new RuntimeException("TEST FAILED: " + e.toString());
102        }
103    }
104}
105