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25
26import static jdk.test.lib.Asserts.*;
27
28import java.lang.module.Configuration;
29import java.lang.module.ModuleDescriptor;
30import java.lang.module.ModuleFinder;
31import java.util.HashMap;
32import java.util.Map;
33import java.util.Set;
34
35//
36// ClassLoader1 --> defines m1x --> packages p1
37// ClassLoader1 --> defines m2x --> packages p2
38//
39// m1x can read m2x
40// package p2 in m2x is exported to m1x
41//
42// class p1.c1 defined in m1x tries to access p2.c2 defined in m2x
43// Access allowed since m1x can read m2x and package p2 is exported to m1x.
44//
45public class ModuleSameCLMain {
46
47    // Create a layer over the boot layer.
48    // Define modules within this layer to test access between
49    // publically defined classes within packages of those modules.
50    public void createLayerOnBoot() throws Throwable {
51
52        // Define module:     m1x
53        // Can read:          java.base, m2x
54        // Packages:          p1
55        // Packages exported: p1 is exported to unqualifiedly
56        ModuleDescriptor descriptor_m1x =
57                ModuleDescriptor.newModule("m1x")
58                        .requires("java.base")
59                        .requires("m2x")
60                        .exports("p1")
61                        .build();
62
63        // Define module:     m2x
64        // Can read:          java.base
65        // Packages:          p2
66        // Packages exported: package p2 is exported to m1x
67        ModuleDescriptor descriptor_m2x =
68                ModuleDescriptor.newModule("m2x")
69                        .requires("java.base")
70                        .exports("p2", Set.of("m1x"))
71                        .build();
72
73        // Set up a ModuleFinder containing all modules for this layer.
74        ModuleFinder finder = ModuleLibrary.of(descriptor_m1x, descriptor_m2x);
75
76        // Resolves "m1x"
77        Configuration cf = ModuleLayer.boot()
78                .configuration()
79                .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
80
81        // map each module to the same class loader for this test
82        Map<String, ClassLoader> map = new HashMap<>();
83        Loader1 cl1 = new Loader1();
84        map.put("m1x", cl1);
85        map.put("m2x", cl1);
86
87        // Create layer that contains m1x & m2x
88        ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
89        assertTrue(layer.findLoader("m1x") == cl1);
90        assertTrue(layer.findLoader("m2x") == cl1);
91        assertTrue(layer.findLoader("java.base") == null);
92
93        // now use the same loader to load class p1.c1
94        Class p1_c1_class = cl1.loadClass("p1.c1");
95        try {
96            p1_c1_class.newInstance();
97        } catch (IllegalAccessError e) {
98            throw new RuntimeException("Test Failed, an IAE should not be thrown since p2 is exported qualifiedly to m1x");
99        }
100    }
101
102    public static void main(String args[]) throws Throwable {
103      ModuleSameCLMain test = new ModuleSameCLMain();
104      test.createLayerOnBoot();
105    }
106
107    static class Loader1 extends ClassLoader { }
108}
109