1 /* 2 * Copyright (c) 2016, 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 p1; 25 26 import java.io.InputStream; 27 import java.io.IOException; 28 import java.lang.module.ModuleDescriptor; 29 import java.net.URI; 30 import java.nio.file.FileSystem; 31 import java.nio.file.FileSystems; 32 import java.nio.file.Files; 33 import java.nio.file.Path; 34 import java.util.Collections; 35 import java.util.Set; 36 37 import jdk.internal.module.ModuleInfo; 38 import jdk.internal.module.ModuleInfo.Attributes; 39 40 public class Main { 41 private static boolean hasModuleTarget(InputStream in) throws IOException { 42 ModuleInfo.Attributes attrs = ModuleInfo.read(in, null); 43 return attrs.target() != null; 44 } 45 46 public static void main(String... args) throws Exception { 47 // load another package 48 p2.T.test(); 49 50 // validate the module descriptor 51 validate(Main.class.getModule()); 52 53 // validate the Moduletarget attribute for java.base 54 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), 55 Collections.emptyMap()); 56 Path path = fs.getPath("/", "modules", "java.base", "module-info.class"); 57 try (InputStream in = Files.newInputStream(path)) { 58 if (! hasModuleTarget(in)) { 59 throw new RuntimeException("Missing ModuleTarget for java.base"); 60 } 61 } 62 } 63 64 static void validate(Module module) throws IOException { 65 ModuleDescriptor md = module.getDescriptor(); 66 67 // read m1/module-info.class 68 FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), 69 Collections.emptyMap()); 70 Path path = fs.getPath("/", "modules", module.getName(), "module-info.class"); 71 ModuleDescriptor md1 = ModuleDescriptor.read(Files.newInputStream(path)); 72 73 74 // check the module descriptor of a system module and read from jimage 75 checkPackages(md.packages(), "p1", "p2"); 76 checkPackages(md1.packages(), "p1", "p2"); 77 78 try (InputStream in = Files.newInputStream(path)) { 79 checkModuleTargetAttribute(in, "p1"); 80 } 81 } 82 83 static void checkPackages(Set<String> pkgs, String... expected) { 84 if (!pkgs.equals(Set.of(expected))) { 85 throw new RuntimeException(pkgs + " expected: " + Set.of(expected)); 86 } 87 } 88 89 static void checkModuleTargetAttribute(InputStream in, String modName) throws IOException { 90 if (hasModuleTarget(in)) { 91 throw new RuntimeException("ModuleTarget present for " + modName); 92 } 93 } 94 }