1 /*

     2  * Copyright (c) 2019, 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 

    25 package org.graalvm.compiler.test;

    26 

    27 import java.io.IOException;

    28 import java.lang.module.ModuleDescriptor.Requires;

    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.ArrayList;

    35 import java.util.Collections;

    36 import java.util.HashSet;

    37 import java.util.List;

    38 import java.util.Set;

    39 

    40 import org.graalvm.compiler.debug.DebugOptions;

    41 

    42 import jdk.internal.module.Modules;

    43 

    44 public class ModuleSupport {

    45 

    46     public static void exportPackageTo(Class<?> moduleMember, String packageName, Class<?> requestor) {

    47         Module moduleToExport = moduleMember.getModule();

    48         Module requestorModule = requestor.getModule();

    49         if (moduleToExport != requestorModule) {

    50             Modules.addExports(moduleToExport, packageName, requestorModule);

    51         }

    52     }

    53 

    54     public static void exportAllPackagesTo(Class<?> moduleMember, Class<?> requestor) {

    55         Module moduleToExport = moduleMember.getModule();

    56         Module requestorModule = requestor.getModule();

    57         if (moduleToExport != requestorModule) {

    58             for (String packageName : moduleToExport.getPackages()) {

    59                 Modules.addExports(moduleToExport, packageName, requestorModule);

    60             }

    61         }

    62     }

    63 

    64     public static void exportAllPackagesTo(Class<?> moduleMember, ClassLoader cl) {

    65         Module moduleToExport = moduleMember.getModule();

    66         Module unnamedModule = cl.getUnnamedModule();

    67         for (String packageName : moduleToExport.getPackages()) {

    68             Modules.addExports(moduleToExport, packageName, unnamedModule);

    69         }

    70     }

    71 

    72     @SuppressWarnings("unused")

    73     public static void exportAndOpenAllPackagesToUnnamed(String name) {

    74         Module module = ModuleLayer.boot().findModule(name).orElseThrow();

    75         Set<String> packages = module.getPackages();

    76         for (String pkg : packages) {

    77             Modules.addExportsToAllUnnamed(module, pkg);

    78             Modules.addOpensToAllUnnamed(module, pkg);

    79         }

    80     }

    81 

    82     public static List<String> getJRTGraalClassNames() throws IOException {

    83         List<String> classNames = new ArrayList<>();

    84         FileSystem fs = FileSystems.newFileSystem(URI.create("jrt:/"), Collections.emptyMap());

    85         Module graalModule = DebugOptions.class.getModule();

    86         Set<String> graalModuleSet = new HashSet<>();

    87         graalModuleSet.add(graalModule.getName());

    88         for (Module module : graalModule.getLayer().modules()) {

    89             if (requires(module, graalModule)) {

    90                 graalModuleSet.add(module.getName());

    91             }

    92         }

    93 

    94         Path top = fs.getPath("/modules/");

    95         Files.find(top, Integer.MAX_VALUE,

    96                         (path, attrs) -> attrs.isRegularFile()).forEach(p -> {

    97                             int nameCount = p.getNameCount();

    98                             if (nameCount > 2) {

    99                                 String base = p.getName(nameCount - 1).toString();

   100                                 if (base.endsWith(".class") && !base.equals("module-info.class")) {

   101                                     String module = p.getName(1).toString();

   102                                     if (graalModuleSet.contains(module)) {

   103                                         // Strip module prefix and convert to dotted

   104                                         // form

   105                                         String className = p.subpath(2, nameCount).toString().replace('/', '.');

   106                                         // Strip ".class" suffix

   107                                         className = className.replace('/', '.').substring(0, className.length() - ".class".length());

   108                                         classNames.add(className);

   109                                     }

   110                                 }

   111                             }

   112                         });

   113         return classNames;

   114     }

   115 

   116     private static boolean requires(Module module, Module graalModule) {

   117         ModuleLayer graalLayer = graalModule.getLayer();

   118         for (Requires r : module.getDescriptor().requires()) {

   119             if (r.name().equals(graalModule.getName())) {

   120                 return true;

   121             }

   122             Module dep = graalLayer.findModule(r.name()).get();

   123             if (requires(dep, graalModule)) {

   124                 return true;

   125             }

   126         }

   127         return false;

   128     }

   129 }