/*

 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @library /testlibrary /test/lib /compiler/whitebox ..

 * @build sun.hotspot.WhiteBox

 * @compile/module=java.base java/lang/reflect/ModuleHelper.java

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI JVMCanReadModule

 */

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

public class JVMCanReadModule {

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

        MyClassLoader asking_cl = new MyClassLoader();

        MyClassLoader target_cl = new MyClassLoader();

        Object asking_module, target_module;

        boolean result;

        asking_module = ModuleHelper.ModuleObject("asking_module", asking_cl, new String[] { "mypackage" });

        assertNotNull(asking_module, "Module should not be null");

        ModuleHelper.DefineModule(asking_module, "9.0", "asking_module/here", new String[] { "mypackage" });

        target_module = ModuleHelper.ModuleObject("target_module", target_cl, new String[] { "yourpackage" });

        assertNotNull(target_module, "Module should not be null");

        ModuleHelper.DefineModule(target_module, "9.0", "target_module/here", new String[] { "yourpackage" });

        // Set up relationship

        ModuleHelper.AddReadsModule(asking_module, target_module);

        // Null asking_module argument, expect an NPE

        try {

            result = ModuleHelper.CanReadModule(null, target_module);

            throw new RuntimeException("Failed to get the expected NPE");

        } catch(NullPointerException e) {

            // Expected

        }

        // Bad asking_module argument, expect an IAE

        try {

            result = ModuleHelper.CanReadModule(asking_cl, target_module);

            throw new RuntimeException("Failed to get the expected IAE");

        } catch(IllegalArgumentException e) {

            // Expected

        }

        // Bad target_module argument, expect an IAE

        try {

            result = ModuleHelper.CanReadModule(asking_module, asking_cl);

            throw new RuntimeException("Failed to get the expected IAE");

        } catch(IllegalArgumentException e) {

            // Expected

        }

        // Verify strict modules can not read the unnamed module

        result = ModuleHelper.CanReadModule(target_module, null);

        assertFalse(result, "target_module can not read unnamed module");

        // Verify asking_module can read itself

        result = ModuleHelper.CanReadModule(asking_module, asking_module);

        assertTrue(result, "asking_module can read itself");

        // Verify asking_module can read target_module

        result = ModuleHelper.CanReadModule(asking_module, target_module);

        assertTrue(result, "asking_module can read target_module");

        // Verify target_module cannot read asking_module

        result = ModuleHelper.CanReadModule(target_module, asking_module);

        assertTrue(!result, "target_module cannot read asking_module");

    }

    static class MyClassLoader extends ClassLoader { }

}