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  */
  23 
  24 package p4;
  25 
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.lang.module.ModuleDescriptor;
  29 import java.lang.module.ModuleFinder;
  30 import java.lang.reflect.Layer;
  31 import java.net.URI;
  32 import java.nio.file.FileSystem;
  33 import java.nio.file.FileSystems;
  34 import java.nio.file.Files;
  35 import java.nio.file.Path;
  36 import java.util.Collections;
  37 import java.util.Set;
  38 
  39 public class Main {
  40     // the system module plugin by default drops ModuleTarget attribute
  41     private static boolean expectModuleTarget = false;
  42     public static void main(String... args) throws IOException {
  43         if (args.length > 0) {
  44             if (!args[0].equals("retainModuleTarget")) {
  45                 throw new IllegalArgumentException(args[0]);
  46             }
  47 
  48             expectModuleTarget = true;
  49         }
  50 
  51         // java.base is packaged with osName/osArch/osVersion
  52         ModuleDescriptor md = Layer.boot().findModule("java.base").get()
  53                                    .getDescriptor();
  54         if (!md.osName().isPresent() ||
  55                 !md.osArch().isPresent() ||
  56                 !md.osVersion().isPresent()) {
  57             throw new RuntimeException("osName/osArch/osVersion is missing: " +
  58                 md.osName() + " " + md.osArch() + " " + md.osVersion());
  59         }
  60 
  61         // verify module-info.class for m1 and m4
  62         checkModule("m1", "p1", "p2");
  63         checkModule("m4", "p4");
  64     }
  65 
  66     private static void checkModule(String mn, String... packages) throws IOException {
  67         // verify ModuleDescriptor from the runtime module
  68         ModuleDescriptor md = Layer.boot().findModule(mn).get()
  69                                    .getDescriptor();
  70         checkModuleDescriptor(md, packages);
  71 
  72         // verify ModuleDescriptor from module-info.class read from ModuleReader
  73         try (InputStream in = ModuleFinder.ofSystem().find(mn).get()
  74             .open().open("module-info.class").get()) {
  75             checkModuleDescriptor(ModuleDescriptor.read(in), packages);
  76         }
  77 
  78         // verify ModuleDescriptor from module-info.class read from jimage
  79         FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"),
  80             Collections.emptyMap());
  81         Path path = fs.getPath("/", "modules", mn, "module-info.class");
  82         checkModuleDescriptor(ModuleDescriptor.read(Files.newInputStream(path)), packages);
  83     }
  84 
  85     static void checkModuleDescriptor(ModuleDescriptor md, String... packages) {
  86         String mainClass = md.name().replace('m', 'p') + ".Main";
  87         if (!md.mainClass().get().equals(mainClass)) {
  88             throw new RuntimeException(md.mainClass().toString());
  89         }
  90 
  91         if (expectModuleTarget) {
  92             // ModuleTarget attribute is retained
  93             if (!md.osName().isPresent() || !md.osArch().isPresent()) {
  94                 throw new RuntimeException("osName or osArch is missing: " +
  95                     md.osName() + " " + md.osArch());
  96             }
  97         } else {
  98             // by default ModuleTarget attribute is dropped
  99             if (md.osName().isPresent() || md.osArch().isPresent()) {
 100                 throw new RuntimeException("osName and osArch should not be set: " +
 101                     md.osName() + " " + md.osArch());
 102             }
 103         }
 104 
 105         if (md.osVersion().isPresent()) {
 106             throw new RuntimeException("Expected no osVersion set: " + md.osVersion());
 107         }
 108 
 109         Set<String> pkgs = md.packages();
 110         if (!pkgs.equals(Set.of(packages))) {
 111             throw new RuntimeException(pkgs + " expected: " + Set.of(packages));
 112         }
 113     }
 114 }