/*

 * 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 p1;

import java.lang.module.ModuleDescriptor;

import java.net.URI;

import java.nio.file.FileSystem;

import java.nio.file.FileSystems;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.Collections;

import java.util.Set;

public class Main {

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

        // load another package

        p2.T.test();

        // check the module descriptor of a system module

        validate(Main.class.getModule().getDescriptor());

        // read m1/module-info.class

        FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"),

                                                  Collections.emptyMap());

        Path path = fs.getPath("/", "modules", "m1", "module-info.class");

        validate(ModuleDescriptor.read(Files.newInputStream(path)));

    }

    static void validate(ModuleDescriptor md) {

        checkPackages(md.packages(), "p1", "p2");

    }

    static void checkPackages(Set<String> pkgs, String... expected) {

        for (String pn : expected) {

            if (!pkgs.contains(pn)) {

                throw new RuntimeException(pn + " missing in " + pkgs);

            }

        }

    }

}