Main.java revision 16598:f9e86da24d74 
1/*
2 * Copyright (c) 2016, 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 */
23
24package p1;
25
26import java.io.IOException;
27import java.lang.module.ModuleDescriptor;
28import java.lang.reflect.Layer;
29import java.lang.reflect.Module;
30import java.net.URI;
31import java.nio.file.FileSystem;
32import java.nio.file.FileSystems;
33import java.nio.file.Files;
34import java.nio.file.Path;
35import java.util.Collections;
36import java.util.Set;
37
38public class Main {
39    public static void main(String... args) throws Exception {
40        // load another package
41        p2.T.test();
42
43        // validate the module descriptor
44        validate(Main.class.getModule());
45
46        // validate the Moduletarget attribute for java.base
47        ModuleDescriptor md = Layer.boot().findModule("java.base").get()
48                                   .getDescriptor();
49        if (!md.osName().isPresent() || !md.osArch().isPresent() ||
50                !md.osVersion().isPresent()) {
51            throw new RuntimeException("java.base: " + md.osName() + " " +
52                    md.osArch() + " " + md.osVersion());
53        }
54    }
55
56    static void validate(Module module) throws IOException {
57        ModuleDescriptor md = module.getDescriptor();
58
59        // read m1/module-info.class
60        FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"),
61                                                  Collections.emptyMap());
62        Path path = fs.getPath("/", "modules", module.getName(), "module-info.class");
63        ModuleDescriptor md1 = ModuleDescriptor.read(Files.newInputStream(path));
64
65
66        // check the module descriptor of a system module and read from jimage
67        checkPackages(md.packages(), "p1", "p2");
68        checkPackages(md1.packages(), "p1", "p2");
69
70        // check ModuleTarget attribute
71        checkModuleTargetAttribute(md);
72        checkModuleTargetAttribute(md1);
73    }
74
75    static void checkPackages(Set<String> pkgs, String... expected) {
76        if (!pkgs.equals(Set.of(expected))) {
77            throw new RuntimeException(pkgs + " expected: " + Set.of(expected));
78        }
79    }
80
81    static void checkModuleTargetAttribute(ModuleDescriptor md) {
82        if (md.osName().isPresent() || md.osArch().isPresent() ||
83                md.osVersion().isPresent()) {
84            throw new RuntimeException(md.osName() + " " + md.osArch() + " " + md.osVersion());
85        }
86    }
87}
88