/*

 * Copyright (c) 2017, 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;

import java.util.Arrays;

import java.util.Set;

import java.util.stream.Collectors;

public class CheckRuntimeVersion {

    public static void main(String... args) {

        int version = Integer.parseInt(args[0]);

        if (Runtime.version().major() != version) {

            throw new RuntimeException(version + " != current runtime version "

                + Runtime.version());

        }

        Set<String> expected = Arrays.stream(args, 1, args.length)

                                     .collect(Collectors.toSet());

        Set<String> modules = ModuleFinder.ofSystem().findAll().stream()

            .map(ModuleReference::descriptor)

            .map(ModuleDescriptor::name)

            .collect(Collectors.toSet());

        if (!modules.equals(expected)) {

            throw new RuntimeException("Expected: " + expected +

                " observable modules: " + modules);

        }

    }

}