1 /* 2 * Copyright (c) 2003, 2013, 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.io.IOException; 29 import java.lang.annotation.Annotation; 30 import java.lang.reflect.Executable; 31 import java.lang.reflect.Layer; 32 import java.lang.reflect.Module; 33 import java.net.URL; 34 import java.security.AccessControlContext; 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 sun.reflect.ConstantPool; 41 import sun.reflect.annotation.AnnotationType; 42 import sun.nio.ch.Interruptible; 43 44 public interface JavaLangAccess { 45 /** Return the constant pool for a class. */ 46 ConstantPool getConstantPool(Class<?> klass); 47 48 /** 49 * Compare-And-Swap the AnnotationType instance corresponding to this class. 50 * (This method only applies to annotation types.) 51 */ 52 boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType); 53 54 /** 55 * Get the AnnotationType instance corresponding to this class. 56 * (This method only applies to annotation types.) 57 */ 58 AnnotationType getAnnotationType(Class<?> klass); 59 60 /** 61 * Get the declared annotations for a given class, indexed by their types. 62 */ 63 Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap(Class<?> klass); 64 65 /** 66 * Get the array of bytes that is the class-file representation 67 * of this Class' annotations. 68 */ 69 byte[] getRawClassAnnotations(Class<?> klass); 70 71 /** 72 * Get the array of bytes that is the class-file representation 73 * of this Class' type annotations. 74 */ 75 byte[] getRawClassTypeAnnotations(Class<?> klass); 76 77 /** 78 * Get the array of bytes that is the class-file representation 79 * of this Executable's type annotations. 80 */ 81 byte[] getRawExecutableTypeAnnotations(Executable executable); 82 83 /** 84 * Returns the elements of an enum class or null if the 85 * Class object does not represent an enum type; 86 * the result is uncloned, cached, and shared by all callers. 87 */ 88 <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass); 89 90 /** Set thread's blocker field. */ 91 void blockedOn(Thread t, Interruptible b); 92 93 /** 94 * Registers a shutdown hook. 95 * 96 * It is expected that this method with registerShutdownInProgress=true 97 * is only used to register DeleteOnExitHook since the first file 98 * may be added to the delete on exit list by the application shutdown 99 * hooks. 100 * 101 * @param slot the slot in the shutdown hook array, whose element 102 * will be invoked in order during shutdown 103 * @param registerShutdownInProgress true to allow the hook 104 * to be registered even if the shutdown is in progress. 105 * @param hook the hook to be registered 106 * 107 * @throws IllegalStateException if shutdown is in progress and 108 * the slot is not valid to register. 109 */ 110 void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook); 111 112 /** 113 * Returns a new string backed by the provided character array. The 114 * character array is not copied and must never be modified after the 115 * String is created, in order to fulfill String's contract. 116 * 117 * @param chars the character array to back the string 118 * @return a newly created string whose content is the character array 119 */ 120 String newStringUnsafe(char[] chars); 121 122 /** 123 * Returns a new Thread with the given Runnable and an 124 * inherited AccessControlContext. 125 */ 126 Thread newThreadWithAcc(Runnable target, AccessControlContext acc); 127 128 /** 129 * Invokes the finalize method of the given object. 130 */ 131 void invokeFinalize(Object o) throws Throwable; 132 133 /** 134 * Returns the boot Layer 135 */ 136 Layer getBootLayer(); 137 138 /** 139 * Returns the ServicesCatalog for the given class loader. 140 */ 141 ServicesCatalog getServicesCatalog(ClassLoader cl); 142 143 /** 144 * Returns the ServicesCatalog for the given class loader, creating it 145 * if doesn't already exist. 146 */ 147 ServicesCatalog createOrGetServicesCatalog(ClassLoader cl); 148 149 /** 150 * Returns the ConcurrentHashMap used as a storage for ClassLoaderValue(s) 151 * associated with the given class loader, creating it if it doesn't already exist. 152 */ 153 ConcurrentHashMap<?, ?> createOrGetClassLoaderValueMap(ClassLoader cl); 154 155 /** 156 * Returns a class loaded by the bootstrap class loader. 157 */ 158 Class<?> findBootstrapClassOrNull(ClassLoader cl, String name); 159 160 /** 161 * Returns a URL to a resource with the given name in a module that is 162 * defined to the given class loader. 163 */ 164 URL findResource(ClassLoader cl, String moduleName, String name) throws IOException; 165 166 /** 167 * Returns the Packages for the given class loader. 168 */ 169 Stream<Package> packages(ClassLoader cl); 170 171 /** 172 * Define a Package of the given name and module by the given class loader. 173 */ 174 Package definePackage(ClassLoader cl, String name, Module module); 175 176 /** 177 * Invokes Long.fastUUID 178 */ 179 String fastUUID(long lsb, long msb); 180 }