1 /* 2 * Copyright (c) 2020, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package jdk.internal.loader; 26 27 import java.util.Map; 28 import jdk.internal.misc.VM; 29 import jdk.internal.module.ServicesCatalog; 30 31 /** 32 * Used to archive the built-in class loaders, their services catalogs, and the 33 * package-to-module map used by the built-in class loaders. 34 */ 35 class ArchivedClassLoaders { 36 private static ArchivedClassLoaders archivedClassLoaders; 37 38 private final ClassLoader bootLoader; 39 private final ClassLoader platformLoader; 40 private final ClassLoader appLoader; 41 private final ServicesCatalog[] servicesCatalogs; 42 private final Map<String, ?> packageToModule; 43 44 private ArchivedClassLoaders() { 45 bootLoader = ClassLoaders.bootLoader(); 46 platformLoader = ClassLoaders.platformClassLoader(); 47 appLoader = ClassLoaders.appClassLoader(); 48 49 servicesCatalogs = new ServicesCatalog[3]; 50 servicesCatalogs[0] = BootLoader.getServicesCatalog(); 51 servicesCatalogs[1] = ServicesCatalog.getServicesCatalog(platformLoader); 52 servicesCatalogs[2] = ServicesCatalog.getServicesCatalog(appLoader); 53 54 packageToModule = BuiltinClassLoader.packageToModule(); 55 } 56 57 ClassLoader bootLoader() { 58 return bootLoader; 59 } 60 61 ClassLoader platformLoader() { 62 return platformLoader; 63 } 64 65 ClassLoader appLoader() { 66 return appLoader; 67 } 68 69 ServicesCatalog servicesCatalog(ClassLoader loader) { 70 if (loader == null) { 71 return servicesCatalogs[0]; 72 } else if (loader == platformLoader) { 73 return servicesCatalogs[1]; 74 } else if (loader == appLoader) { 75 return servicesCatalogs[2]; 76 } else { 77 throw new InternalError(); 78 } 79 } 80 81 Map<String, ?> packageToModule() { 82 return packageToModule; 83 } 84 85 static void archive() { 86 archivedClassLoaders = new ArchivedClassLoaders(); 87 } 88 89 static ArchivedClassLoaders get() { 90 return archivedClassLoaders; 91 } 92 93 static { 94 VM.initializeFromArchive(ArchivedClassLoaders.class); 95 } 96 }