/*

 * Copyright (c) 2018, 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.

 */

import java.lang.module.ModuleDescriptor;

import java.lang.module.ModuleFinder;

import java.lang.module.ModuleReference;

/**

 * Test the set of modules in the boot layer includes all modules that export

 * an API. Also test that java.se is not resolved.

 */

public class TestRootModules {

    public static void main(String[] args) {

        // all modules that export an API should be resolved

        // For now, this test ignores the ModuleResolution attribute

        ModuleLayer bootLayer = ModuleLayer.boot();

        ModuleFinder.ofSystem().findAll().stream()

            .map(ModuleReference::descriptor)

            .filter(descriptor -> descriptor.exports()

                    .stream()

                    .filter(e -> !e.isQualified())

                    .findAny()

                    .isPresent())

            .map(ModuleDescriptor::name)

            .forEach(name -> {

                if (!bootLayer.findModule(name).isPresent())

                    throw new RuntimeException(name + " not in boot layer");

            });

        // java.se should not be resolved

        ModuleLayer.boot()

                .findModule("java.se")

                .map(m -> { throw new RuntimeException("java.se should not be resolved"); });

    }

}