| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.module; |
| |
| import java.lang.module.Configuration; |
| import java.lang.module.ResolvedModule; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.Function; |
| |
| import jdk.internal.loader.ClassLoaders; |
| |
| |
| /** |
| * Supports the mapping of modules to class loaders. The set of modules mapped |
| * to the boot and platform class loaders is generated at build time from |
| * this source file. |
| */ |
| public final class ModuleLoaderMap { |
| |
| /** |
| * Maps the system modules to the built-in class loaders. |
| */ |
| public static final class Mapper implements Function<String, ClassLoader> { |
| private final Map<String, ClassLoader> map; |
| |
| Mapper(Map<String, ClassLoader> map) { |
| this.map = map; // defensive copy not needed |
| } |
| |
| @Override |
| public ClassLoader apply(String name) { |
| return map.get(name); |
| } |
| } |
| |
| /** |
| * Returns the names of the modules defined to the boot loader. |
| */ |
| public static Set<String> bootModules() { |
| // The list of boot modules generated at build time. |
| String[] BOOT_MODULES = new String[] { "@@BOOT_MODULE_NAMES@@" }; |
| Set<String> bootModules = new HashSet<>(BOOT_MODULES.length); |
| for (String mn : BOOT_MODULES) { |
| bootModules.add(mn); |
| } |
| return bootModules; |
| } |
| |
| /** |
| * Returns the names of the modules defined to the platform loader. |
| */ |
| public static Set<String> platformModules() { |
| // The list of platform modules generated at build time. |
| String[] PLATFORM_MODULES = new String[] { "@@PLATFORM_MODULE_NAMES@@" }; |
| Set<String> platformModules = new HashSet<>(PLATFORM_MODULES.length); |
| for (String mn : PLATFORM_MODULES) { |
| platformModules.add(mn); |
| } |
| return platformModules; |
| } |
| |
| /** |
| * Returns the function to map modules in the given configuration to the |
| * built-in class loaders. |
| */ |
| static Function<String, ClassLoader> mappingFunction(Configuration cf) { |
| Set<String> bootModules = bootModules(); |
| Set<String> platformModules = platformModules(); |
| |
| ClassLoader platformClassLoader = ClassLoaders.platformClassLoader(); |
| ClassLoader appClassLoader = ClassLoaders.appClassLoader(); |
| |
| Map<String, ClassLoader> map = new HashMap<>(); |
| for (ResolvedModule resolvedModule : cf.modules()) { |
| String mn = resolvedModule.name(); |
| if (!bootModules.contains(mn)) { |
| if (platformModules.contains(mn)) { |
| map.put(mn, platformClassLoader); |
| } else { |
| map.put(mn, appClassLoader); |
| } |
| } |
| } |
| return new Mapper(map); |
| } |
| } |