/*

 * 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.

 */

package p3;

import java.lang.reflect.Layer;

import java.lang.reflect.Module;

import java.security.AccessControlException;

import java.security.Permission;

/**

 * Verify RuntimePermission("getClassLoader") is needed to load

 * a class in another module

 */

public class NoGetClassLoaderAccess {

    private static final Module m3 = NoGetClassLoaderAccess.class.getModule();

    private static final Permission GET_CLASSLOADER_PERMISSION = new RuntimePermission("getClassLoader");

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

        Layer boot = Layer.boot();

        System.setSecurityManager(new SecurityManager());

        Module m1 = boot.findModule("m1").get();

        Module m2 = boot.findModule("m2").get();

        findClass(m1, "p1.A");

        findClass(m1, "p1.internal.B");

        findClass(m2, "p2.C");

        findClass(m3, "p3.internal.Foo");

    }

    static Class<?> findClass(Module module, String cn) {

        try {

            Class<?> c = Class.forName(module, cn);

            if (c == null) {

                throw new RuntimeException(cn + " not found in " + module);

            }

            if (c.getModule() != module) {

                throw new RuntimeException(c.getModule() + " != " + module);

            }

            return c;

        } catch (AccessControlException e) {

            if (module != m3) {

                if (e.getPermission().equals(GET_CLASSLOADER_PERMISSION))

                    return null;

            }

            throw e;

        }

    }

}