DiffCL_ExpUnqual.java revision 10420:c558850fac57 
1/*
2 * Copyright (c) 2016, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 * @test
28 * @summary Test that if module m1 can read module m2, and package p2 in m2 is
29 *          exported unqualifiedly, then class p1.c1 in m1 can read p2.c2 in m2.
30 * @library /testlibrary /test/lib
31 * @compile myloaders/MyDiffClassLoader.java
32 * @compile p2/c2.java
33 * @compile p1/c1.java
34 * @build DiffCL_ExpUnqual
35 * @run main/othervm -Xbootclasspath/a:. DiffCL_ExpUnqual
36 */
37
38import static jdk.test.lib.Asserts.*;
39
40import java.lang.reflect.Layer;
41import java.lang.module.Configuration;
42import java.lang.module.ModuleDescriptor;
43import java.lang.module.ModuleFinder;
44import java.util.HashMap;
45import java.util.Map;
46import java.util.Set;
47import myloaders.MyDiffClassLoader;
48
49//
50// ClassLoader1 --> defines m1 --> packages p1
51// ClassLoader2 --> defines m2 --> packages p2
52//
53// m1 can read m2
54// package p2 in m2 is exported to m1
55//
56// class p1.c1 defined in m1 tries to access p2.c2 defined in m2
57// Access allowed since m1 can read m2 and package p2 is exported
58// unqualifiedly.
59//
60public class DiffCL_ExpUnqual {
61
62    // Create a Layer over the boot layer.
63    // Define modules within this layer to test access between
64    // publically defined classes within packages of those modules.
65    public void createLayerOnBoot() throws Throwable {
66
67        // Define module:     m1
68        // Can read:          java.base, m2
69        // Packages:          p1
70        // Packages exported: p1 is exported unqualifiedly
71        ModuleDescriptor descriptor_m1 =
72                new ModuleDescriptor.Builder("m1")
73                        .requires("java.base")
74                        .requires("m2")
75                        .exports("p1")
76                        .build();
77
78        // Define module:     m2
79        // Can read:          java.base
80        // Packages:          p2
81        // Packages exported: package p2 is exported to m1
82        ModuleDescriptor descriptor_m2 =
83                new ModuleDescriptor.Builder("m2")
84                        .requires("java.base")
85                        .exports("p2")
86                        .build();
87
88        // Set up a ModuleFinder containing all modules for this layer.
89        ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2);
90
91        // Resolves "m1"
92        Configuration cf = Layer.boot()
93                .configuration()
94                .resolveRequires(finder, ModuleFinder.empty(), Set.of("m1"));
95
96        // map each module to differing class loaders for this test
97        Map<String, ClassLoader> map = new HashMap<>();
98        map.put("m1", MyDiffClassLoader.loader1);
99        map.put("m2", MyDiffClassLoader.loader2);
100
101        // Create Layer that contains m1 & m2
102        Layer layer = Layer.boot().defineModules(cf, map::get);
103
104        assertTrue(layer.findLoader("m1") == MyDiffClassLoader.loader1);
105        assertTrue(layer.findLoader("m2") == MyDiffClassLoader.loader2);
106        assertTrue(layer.findLoader("java.base") == null);
107
108        // now use the same loader to load class p1.c1
109        Class p1_c1_class = MyDiffClassLoader.loader1.loadClass("p1.c1");
110        try {
111            p1_c1_class.newInstance();
112        } catch (IllegalAccessError e) {
113            throw new RuntimeException("Test Failed, an IAE should not be thrown since p2 is exported qualifiedly to m1");
114        }
115    }
116
117    public static void main(String args[]) throws Throwable {
118      DiffCL_ExpUnqual test = new DiffCL_ExpUnqual();
119      test.createLayerOnBoot();
120    }
121}
122