DiffCL_ExpUnqual.java revision 12723:afedee84773e 
1/*
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14 * version 2 for more details (a copy is included in the LICENSE file that
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25
26/*
27 * @test
28 * @summary Test that if module m1x can read module m2x, and package p2 in m2x is
29 *          exported unqualifiedly, then class p1.c1 in m1x can read p2.c2 in m2x.
30 * @modules java.base/jdk.internal.misc
31 * @library /test/lib
32 * @compile myloaders/MyDiffClassLoader.java
33 * @compile p2/c2.java
34 * @compile p1/c1.java
35 * @run main/othervm -Xbootclasspath/a:. DiffCL_ExpUnqual
36 */
37
38import static jdk.test.lib.Asserts.*;
39
40import java.lang.module.Configuration;
41import java.lang.module.ModuleDescriptor;
42import java.lang.module.ModuleFinder;
43import java.util.HashMap;
44import java.util.Map;
45import java.util.Set;
46import myloaders.MyDiffClassLoader;
47
48//
49// ClassLoader1 --> defines m1x --> packages p1
50// ClassLoader2 --> defines m2x --> packages p2
51//
52// m1x can read m2x
53// package p2 in m2x is exported to m1x
54//
55// class p1.c1 defined in m1x tries to access p2.c2 defined in m2x
56// Access allowed since m1x can read m2x and package p2 is exported
57// unqualifiedly.
58//
59public class DiffCL_ExpUnqual {
60
61    // Create a layer over the boot layer.
62    // Define modules within this layer to test access between
63    // publically defined classes within packages of those modules.
64    public void createLayerOnBoot() throws Throwable {
65
66        // Define module:     m1x
67        // Can read:          java.base, m2x
68        // Packages:          p1
69        // Packages exported: p1 is exported unqualifiedly
70        ModuleDescriptor descriptor_m1x =
71                ModuleDescriptor.newModule("m1x")
72                        .requires("java.base")
73                        .requires("m2x")
74                        .exports("p1")
75                        .build();
76
77        // Define module:     m2x
78        // Can read:          java.base
79        // Packages:          p2
80        // Packages exported: package p2 is exported to m1x
81        ModuleDescriptor descriptor_m2x =
82                ModuleDescriptor.newModule("m2x")
83                        .requires("java.base")
84                        .exports("p2")
85                        .build();
86
87        // Set up a ModuleFinder containing all modules for this layer.
88        ModuleFinder finder = ModuleLibrary.of(descriptor_m1x, descriptor_m2x);
89
90        // Resolves "m1x"
91        Configuration cf = ModuleLayer.boot()
92                .configuration()
93                .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
94
95        // map each module to differing class loaders for this test
96        Map<String, ClassLoader> map = new HashMap<>();
97        map.put("m1x", MyDiffClassLoader.loader1);
98        map.put("m2x", MyDiffClassLoader.loader2);
99
100        // Create layer that contains m1x & m2x
101        ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
102
103        assertTrue(layer.findLoader("m1x") == MyDiffClassLoader.loader1);
104        assertTrue(layer.findLoader("m2x") == MyDiffClassLoader.loader2);
105        assertTrue(layer.findLoader("java.base") == null);
106
107        // now use the same loader to load class p1.c1
108        Class p1_c1_class = MyDiffClassLoader.loader1.loadClass("p1.c1");
109        try {
110            p1_c1_class.newInstance();
111        } catch (IllegalAccessError e) {
112            throw new RuntimeException("Test Failed, an IAE should not be thrown since p2 is exported qualifiedly to m1x");
113        }
114    }
115
116    public static void main(String args[]) throws Throwable {
117      DiffCL_ExpUnqual test = new DiffCL_ExpUnqual();
118      test.createLayerOnBoot();
119    }
120}
121