1/*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package p1;
24
25import java.lang.module.ModuleFinder;
26import java.util.Set;
27import java.util.stream.Collectors;
28import java.util.stream.Stream;
29
30/**
31 * This tests if JAVA_HOME is linked only with the specified modules.
32 */
33public class Main {
34    public static void main(String... args) {
35        Set<String> modules = ModuleFinder.ofSystem().findAll().stream()
36            .map(mref -> mref.descriptor().name())
37            .filter(mn -> !mn.equals("java.base"))
38            .collect(Collectors.toSet());
39
40        Set<String> notLinked = Stream.of(args).filter(mn -> !modules.contains(mn))
41                                      .collect(Collectors.toSet());
42        if (!notLinked.isEmpty()) {
43            throw new RuntimeException("Expected modules not linked in the image: "
44                + notLinked);
45        }
46        Stream.of(args).forEach(modules::remove);
47
48        if (!modules.isEmpty()) {
49            throw new RuntimeException("Unexpected modules linked in the image: "
50                + modules);
51        }
52    }
53}
54