1/*
2 * Copyright (c) 2004, 2015, 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 * @bug 4974913
27 * @summary Test that array classes can be found in signatures always
28 * and can be deserialized by the deprecated MBeanServer.deserialize method
29 * @author Eamonn McManus
30 *
31 * @run clean ArrayClassTest
32 * @run build ArrayClassTest
33 * @run main ArrayClassTest
34 */
35
36import java.io.*;
37import java.lang.reflect.*;
38import java.net.*;
39import java.nio.file.Paths;
40import javax.management.*;
41import javax.management.loading.*;
42
43public class ArrayClassTest {
44    public static void main(String[] args) throws Exception {
45        MBeanServer mbs = MBeanServerFactory.createMBeanServer();
46
47        String[] cpaths = System.getProperty("test.classes", ".")
48                                .split(File.pathSeparator);
49        URL[] urls = new URL[cpaths.length];
50        for (int i=0; i < cpaths.length; i++) {
51            urls[i] = Paths.get(cpaths[i]).toUri().toURL();
52        }
53
54        // Create an MLet that can load the same class names but
55        // will produce different results.
56        ClassLoader loader = new SpyLoader(urls);
57        ObjectName loaderName = new ObjectName("test:type=SpyLoader");
58        mbs.registerMBean(loader, loaderName);
59
60        ObjectName testName = new ObjectName("test:type=Test");
61        mbs.createMBean(Test.class.getName(), testName, loaderName,
62                        new Object[1], new String[] {X[].class.getName()});
63        ClassLoader checkLoader = mbs.getClassLoaderFor(testName);
64        if (checkLoader != loader)
65            throw new AssertionError("Wrong loader: " + checkLoader);
66
67        mbs.invoke(testName, "ignore", new Object[1],
68                   new String[] {Y[].class.getName()});
69
70        ByteArrayOutputStream bout = new ByteArrayOutputStream();
71        ObjectOutputStream oout = new ObjectOutputStream(bout);
72        oout.writeObject(new Z[0]);
73        oout.close();
74        byte[] bytes = bout.toByteArray();
75        ObjectInputStream oin = mbs.deserialize(testName, bytes);
76        Object zarray = oin.readObject();
77        String failed = null;
78        if (zarray instanceof Z[])
79            failed = "read back a real Z[]";
80        else if (!zarray.getClass().getName().equals(Z[].class.getName())) {
81            failed = "returned object of wrong type: " +
82                zarray.getClass().getName();
83        } else if (Array.getLength(zarray) != 0)
84            failed = "returned array of wrong size: " + Array.getLength(zarray);
85        if (failed != null) {
86            System.out.println("TEST FAILED: " + failed);
87            System.exit(1);
88        }
89
90        System.out.println("Test passed");
91    }
92
93    public static interface TestMBean {
94        public void ignore(Y[] ignored);
95    }
96
97    public static class Test implements TestMBean {
98        public Test(X[] ignored) {}
99        public void ignore(Y[] ignored) {}
100    }
101
102    public static class X {}
103    public static class Y {}
104    public static class Z implements Serializable {}
105
106    public static interface SpyLoaderMBean {}
107
108    /* We originally had this extend MLet but for some reason that
109       stopped the bug from happening.  Some side-effect of registering
110       the MLet in the MBean server caused it not to fail when asked
111       to load Z[].  */
112    public static class SpyLoader extends URLClassLoader
113            implements SpyLoaderMBean, PrivateClassLoader {
114        public SpyLoader(URL[] urls) {
115            // important that the parent classloader be null!
116            // otherwise we can pick up classes from the classpath
117            super(urls, null);
118        }
119
120        /*
121        public Class loadClass(String name) throws ClassNotFoundException {
122            System.out.println("loadClass: " + name);
123            return super.loadClass(name);
124        }
125
126        public Class loadClass(String name, boolean resolve)
127                throws ClassNotFoundException {
128            System.out.println("loadClass: " + name + ", " + resolve);
129            return super.loadClass(name, resolve);
130        }
131        */
132
133        public Class findClass(String name) throws ClassNotFoundException {
134            System.out.println("findClass: " + name);
135            if (false)
136                new Throwable().printStackTrace(System.out);
137            Class c = super.findClass(name);
138            System.out.println(" -> " + name + " (" + c.getClassLoader() + ")");
139            return c;
140        }
141    }
142}
143