1 /* 2 * Copyright (c) 2003, 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. 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 26 package jdk.internal.misc; 27 28 import java.lang.annotation.Annotation; 29 import java.lang.module.ModuleDescriptor; 30 import java.lang.reflect.Executable; 31 import java.lang.reflect.Method; 32 import java.net.URI; 33 import java.security.AccessControlContext; 34 import java.security.ProtectionDomain; 35 import java.util.Map; 36 import java.util.concurrent.ConcurrentHashMap; 37 import java.util.stream.Stream; 38 39 import jdk.internal.module.ServicesCatalog; 40 import jdk.internal.reflect.ConstantPool; 41 import sun.reflect.annotation.AnnotationType; 42 import sun.nio.ch.Interruptible; 43 44 public interface JavaLangAccess { 45 46 /** 47 * Returns a {@code Method} object that reflects the specified public 48 * member method of the given class. Returns {@code null} if the 49 * method is not defined. 50 */ 51 Method getMethodOrNull(Class<?> klass, String name, Class<?>... parameterTypes); 52 53 /** Return the constant pool for a class. */ 54 ConstantPool getConstantPool(Class<?> klass); 55 56 /** 57 * Compare-And-Swap the AnnotationType instance corresponding to this class. 58 * (This method only applies to annotation types.) 59 */ 60 boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType); 61 62 /** 63 * Get the AnnotationType instance corresponding to this class. 64 * (This method only applies to annotation types.) 65 */ 66 AnnotationType getAnnotationType(Class<?> klass); 67 68 /** 69 * Get the declared annotations for a given class, indexed by their types. 70 */ 71 Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap(Class<?> klass); 72 73 /** 74 * Get the array of bytes that is the class-file representation 75 * of this Class' annotations. 76 */ 77 byte[] getRawClassAnnotations(Class<?> klass); 78 79 /** 80 * Get the array of bytes that is the class-file representation 81 * of this Class' type annotations. 82 */ 83 byte[] getRawClassTypeAnnotations(Class<?> klass); 84 85 /** 86 * Get the array of bytes that is the class-file representation 87 * of this Executable's type annotations. 88 */ 89 byte[] getRawExecutableTypeAnnotations(Executable executable); 90 91 /** 92 * Returns the elements of an enum class or null if the 93 * Class object does not represent an enum type; 94 * the result is uncloned, cached, and shared by all callers. 95 */ 96 <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass); 97 98 /** Set thread's blocker field. */ 99 void blockedOn(Thread t, Interruptible b); 100 101 /** 102 * Registers a shutdown hook. 103 * 104 * It is expected that this method with registerShutdownInProgress=true 105 * is only used to register DeleteOnExitHook since the first file 106 * may be added to the delete on exit list by the application shutdown 107 * hooks. 108 * 109 * @param slot the slot in the shutdown hook array, whose element 110 * will be invoked in order during shutdown 111 * @param registerShutdownInProgress true to allow the hook 112 * to be registered even if the shutdown is in progress. 113 * @param hook the hook to be registered 114 * 115 * @throws IllegalStateException if shutdown is in progress and 116 * the slot is not valid to register. 117 */ 118 void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook); 119 120 /** 121 * Returns a new string backed by the provided character array. The 122 * character array is not copied and must never be modified after the 123 * String is created, in order to fulfill String's contract. 124 * 125 * @param chars the character array to back the string 126 * @return a newly created string whose content is the character array 127 */ 128 String newStringUnsafe(char[] chars); 129 130 /** 131 * Returns a new Thread with the given Runnable and an 132 * inherited AccessControlContext. 133 */ 134 Thread newThreadWithAcc(Runnable target, AccessControlContext acc); 135 136 /** 137 * Invokes the finalize method of the given object. 138 */ 139 void invokeFinalize(Object o) throws Throwable; 140 141 /** 142 * Returns the ConcurrentHashMap used as a storage for ClassLoaderValue(s) 143 * associated with the given class loader, creating it if it doesn't already exist. 144 */ 145 ConcurrentHashMap<?, ?> createOrGetClassLoaderValueMap(ClassLoader cl); 146 147 /** 148 * Defines a class with the given name to a class loader. 149 */ 150 Class<?> defineClass(ClassLoader cl, String name, byte[] b, ProtectionDomain pd, String source); 151 152 /** 153 * Returns a class loaded by the bootstrap class loader. 154 */ 155 Class<?> findBootstrapClassOrNull(ClassLoader cl, String name); 156 157 /** 158 * Returns the Packages for the given class loader. 159 */ 160 Stream<Package> packages(ClassLoader cl); 161 162 /** 163 * Define a Package of the given name and module by the given class loader. 164 */ 165 Package definePackage(ClassLoader cl, String name, Module module); 166 167 /** 168 * Invokes Long.fastUUID 169 */ 170 String fastUUID(long lsb, long msb); 171 172 /** 173 * Record the non-exported packages of the modules in the given layer 174 */ 175 void addNonExportedPackages(ModuleLayer layer); 176 177 /** 178 * Invalidate package access cache 179 */ 180 void invalidatePackageAccessCache(); 181 182 /** 183 * Defines a new module to the Java virtual machine. The module 184 * is defined to the given class loader. 185 * 186 * The URI is for information purposes only, it can be {@code null}. 187 */ 188 Module defineModule(ClassLoader loader, ModuleDescriptor descriptor, URI uri); 189 190 /** 191 * Defines the unnamed module for the given class loader. 192 */ 193 Module defineUnnamedModule(ClassLoader loader); 194 195 /** 196 * Updates the readability so that module m1 reads m2. The new read edge 197 * does not result in a strong reference to m2 (m2 can be GC'ed). 198 * 199 * This method is the same as m1.addReads(m2) but without a permission check. 200 */ 201 void addReads(Module m1, Module m2); 202 203 /** 204 * Updates module m to read all unnamed modules. 205 */ 206 void addReadsAllUnnamed(Module m); 207 208 /** 209 * Updates module m1 to export a package to module m2. The export does 210 * not result in a strong reference to m2 (m2 can be GC'ed). 211 */ 212 void addExports(Module m1, String pkg, Module m2); 213 214 /** 215 * Updates a module m to export a package to all unnamed modules. 216 */ 217 void addExportsToAllUnnamed(Module m, String pkg); 218 219 /** 220 * Updates module m1 to open a package to module m2. Opening the 221 * package does not result in a strong reference to m2 (m2 can be GC'ed). 222 */ 223 void addOpens(Module m1, String pkg, Module m2); 224 225 /** 226 * Updates a module m to open a package to all unnamed modules. 227 */ 228 void addOpensToAllUnnamed(Module m, String pkg); 229 230 /** 231 * Updates a module m to use a service. 232 */ 233 void addUses(Module m, Class<?> service); 234 235 /** 236 * Returns the ServicesCatalog for the given Layer. 237 */ 238 ServicesCatalog getServicesCatalog(ModuleLayer layer); 239 240 /** 241 * Returns an ordered stream of layers. The first element is is the 242 * given layer, the remaining elements are its parents, in DFS order. 243 */ 244 Stream<ModuleLayer> layers(ModuleLayer layer); 245 246 /** 247 * Returns a stream of the layers that have modules defined to the 248 * given class loader. 249 */ 250 Stream<ModuleLayer> layers(ClassLoader loader); 251 } --- EOF ---