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.net.URI; 31 import java.nio.file.FileSystem; 32 import java.nio.file.FileSystems; 33 import java.nio.file.Files; 34 import java.nio.file.Path; 35 import java.util.Map; 36 import java.util.Set; 37 38 import jdk.internal.module.ModuleInfo; 39 import jdk.internal.module.ModuleInfo.Attributes; 40 41 public class Main { 42 private static boolean hasModuleTarget(InputStream in) throws IOException { 43 ModuleInfo.Attributes attrs = ModuleInfo.read(in, null); 44 return attrs.target() != null; 45 } 46 47 private static boolean hasModuleTarget(String modName) throws IOException { 48 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), Map.of()); 49 Path path = fs.getPath("/", "modules", modName, "module-info.class"); 50 try (InputStream in = Files.newInputStream(path)) { 51 return hasModuleTarget(in); 52 } 53 } 54 55 // the system module plugin by default drops ModuleTarget attribute 56 private static boolean expectModuleTarget = false; 57 public static void main(String... args) throws IOException { 58 if (args.length > 0) { 59 if (!args[0].equals("retainModuleTarget")) { 60 throw new IllegalArgumentException(args[0]); 61 } 62 63 expectModuleTarget = true; 64 } 65 66 // java.base is packaged with ModuleTarget 67 if (!hasModuleTarget("java.base")) { 68 throw new RuntimeException("ModuleTarget absent for java.base"); 69 } 70 71 // verify module-info.class for m1 and m4 72 checkModule("m1", "p1", "p2"); 73 checkModule("m4", "p4"); 74 } 75 76 private static void checkModule(String mn, String... packages) throws IOException { 77 // verify ModuleDescriptor from the runtime module 78 ModuleDescriptor md = ModuleLayer.boot().findModule(mn).get() 79 .getDescriptor(); 80 checkModuleDescriptor(md, packages); 81 82 // verify ModuleDescriptor from module-info.class read from ModuleReader 83 try (InputStream in = ModuleFinder.ofSystem().find(mn).get() 84 .open().open("module-info.class").get()) { 85 checkModuleDescriptor(ModuleDescriptor.read(in), packages); 86 } 87 88 // verify ModuleDescriptor from module-info.class read from jimage 89 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), Map.of()); 90 Path path = fs.getPath("/", "modules", mn, "module-info.class"); 91 checkModuleDescriptor(ModuleDescriptor.read(Files.newInputStream(path)), packages); 92 } 93 94 static void checkModuleDescriptor(ModuleDescriptor md, String... packages) throws IOException { 95 String mainClass = md.name().replace('m', 'p') + ".Main"; 96 if (!md.mainClass().get().equals(mainClass)) { 97 throw new RuntimeException(md.mainClass().toString()); 98 } 99 100 // ModuleTarget attribute should be present 101 if (!hasModuleTarget(md.name())) { 102 throw new RuntimeException("ModuleTarget missing for " + md.name()); 103 } 104 105 Set<String> pkgs = md.packages(); 106 if (!pkgs.equals(Set.of(packages))) { 107 throw new RuntimeException(pkgs + " expected: " + Set.of(packages)); 108 } 109 } 110 }