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/*

 * @test

 * @summary Test if package p2 in module m2 is exported to all unnamed,

 *          then class p1.c1 in an unnamed module can read p2.c2 in module m2.

 * @library /testlibrary /test/lib

 * @compile myloaders/MySameClassLoader.java

 * @compile p2/c2.java

 * @compile p1/c1.java

 */

import static jdk.test.lib.Asserts.*;

import java.lang.module.Configuration;

import java.lang.module.ModuleDescriptor;

import java.lang.module.ModuleFinder;

import java.lang.reflect.Layer;

import java.lang.reflect.Module;

import java.util.HashMap;

import java.util.Map;

import java.util.Set;

import myloaders.MySameClassLoader;

//

// ClassLoader1 --> defines m1 --> no packages

//                  defines m2 --> packages p2

//

// m1 can read m2

// package p2 in m2 is exported unqualifiedly

//

// class p1.c1 defined in an unnamed module tries to access p2.c2 defined in m2

// Access allowed, an unnamed module can read all modules and p2 in module

//           m2 is exported to all unnamed modules.

public class ExportAllUnnamed {

    // Create a Layer over the boot layer.

    // Define modules within this layer to test access between

    // publically defined classes within packages of those modules.

    public void createLayerOnBoot() throws Throwable {

        // Define module:     m1

        // Can read:          java.base, m2

        // Packages:          none

        // Packages exported: none

        ModuleDescriptor descriptor_m1 =

                new ModuleDescriptor.Builder("m1")

                        .requires("java.base")

                        .requires("m2")

                        .build();

        // Define module:     m2

        // Can read:          java.base

        // Packages:          p2

        // Packages exported: p2 is exported unqualifiedly

        ModuleDescriptor descriptor_m2 =

                new ModuleDescriptor.Builder("m2")

                        .requires("java.base")

                        .exports("p2", "m1")

                        .build();

        // Set up a ModuleFinder containing all modules for this layer.

        ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2);

        // Resolves "m1"

        Configuration cf = Layer.boot()

                .configuration()

                .resolveRequires(finder, ModuleFinder.empty(), Set.of("m1"));

        // map each module to differing class loaders for this test

        Map<String, ClassLoader> map = new HashMap<>();

        map.put("m1", MySameClassLoader.loader1);

        map.put("m2", MySameClassLoader.loader1);

        // Create Layer that contains m1 & m2

        Layer layer = Layer.boot().defineModules(cf, map::get);

        assertTrue(layer.findLoader("m1") == MySameClassLoader.loader1);

        assertTrue(layer.findLoader("m2") == MySameClassLoader.loader1);

        assertTrue(layer.findLoader("java.base") == null);

        Class p2_c2_class = MySameClassLoader.loader1.loadClass("p2.c2");

        Module m2 = p2_c2_class.getModule();

        // Export m2/p2 to all unnamed modules.

        jdk.internal.module.Modules.addExportsToAllUnnamed(m2, "p2");

        // now use the same loader to load class p1.c1

        Class p1_c1_class = MySameClassLoader.loader1.loadClass("p1.c1");

        try {

            p1_c1_class.newInstance();

        } catch (IllegalAccessError e) {

            throw new RuntimeException("Test Failed, unnamed module failed to access public type p2.c2 " +

                                       "that was exported to all unnamed");

        }

    }

    public static void main(String args[]) throws Throwable {

      ExportAllUnnamed test = new ExportAllUnnamed();

      test.createLayerOnBoot();

    }

}