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.lang.annotation.Annotation; 29 import java.lang.reflect.Executable; 30 import java.security.AccessControlContext; 31 import java.util.Map; 32 33 import sun.reflect.ConstantPool; 34 import sun.reflect.annotation.AnnotationType; 35 import sun.nio.ch.Interruptible; 36 37 public interface JavaLangAccess { 38 /** Return the constant pool for a class. */ 39 ConstantPool getConstantPool(Class<?> klass); 40 41 /** 42 * Compare-And-Swap the AnnotationType instance corresponding to this class. 43 * (This method only applies to annotation types.) 44 */ 45 boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType); 46 47 /** 48 * Get the AnnotationType instance corresponding to this class. 49 * (This method only applies to annotation types.) 50 */ 51 AnnotationType getAnnotationType(Class<?> klass); 52 53 /** 54 * Get the declared annotations for a given class, indexed by their types. 55 */ 56 Map<Class<? extends Annotation>, Annotation> getDeclaredAnnotationMap(Class<?> klass); 57 58 /** 59 * Get the array of bytes that is the class-file representation 60 * of this Class' annotations. 61 */ 62 byte[] getRawClassAnnotations(Class<?> klass); 63 64 /** 65 * Get the array of bytes that is the class-file representation 66 * of this Class' type annotations. 67 */ 68 byte[] getRawClassTypeAnnotations(Class<?> klass); 69 70 /** 71 * Get the array of bytes that is the class-file representation 72 * of this Executable's type annotations. 73 */ 74 byte[] getRawExecutableTypeAnnotations(Executable executable); 75 76 /** 77 * Returns the elements of an enum class or null if the 78 * Class object does not represent an enum type; 79 * the result is uncloned, cached, and shared by all callers. 80 */ 81 <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass); 82 83 /** Set thread's blocker field. */ 84 void blockedOn(Thread t, Interruptible b); 85 86 /** 87 * Registers a shutdown hook. 88 * 89 * It is expected that this method with registerShutdownInProgress=true 90 * is only used to register DeleteOnExitHook since the first file 91 * may be added to the delete on exit list by the application shutdown 92 * hooks. 93 * 94 * @param slot the slot in the shutdown hook array, whose element 95 * will be invoked in order during shutdown 96 * @param registerShutdownInProgress true to allow the hook 97 * to be registered even if the shutdown is in progress. 98 * @param hook the hook to be registered 99 * 100 * @throws IllegalStateException if shutdown is in progress and 101 * the slot is not valid to register. 102 */ 103 void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook); 104 105 /** 106 * Returns the number of stack frames represented by the given throwable. 107 */ 108 int getStackTraceDepth(Throwable t); 109 110 /** 111 * Returns the ith StackTraceElement for the given throwable. 112 */ 113 StackTraceElement getStackTraceElement(Throwable t, int i); 114 115 /** 116 * Returns a new string backed by the provided character array. The 117 * character array is not copied and must never be modified after the 118 * String is created, in order to fulfill String's contract. 119 * 120 * @param chars the character array to back the string 121 * @return a newly created string whose content is the character array 122 */ 123 String newStringUnsafe(char[] chars); 124 125 /** 126 * Returns a new Thread with the given Runnable and an 127 * inherited AccessControlContext. 128 */ 129 Thread newThreadWithAcc(Runnable target, AccessControlContext acc); 130 131 /** 132 * Invokes the finalize method of the given object. 133 */ 134 void invokeFinalize(Object o) throws Throwable; 135 136 /** 137 * Invokes Long.formatUnsignedLong(long val, int shift, char[] buf, int offset, int len) 138 */ 139 void formatUnsignedLong(long val, int shift, char[] buf, int offset, int len); 140 141 /** 142 * Invokes Integer.formatUnsignedInt(long val, int shift, char[] buf, int offset, int len) 143 */ 144 void formatUnsignedInt(int val, int shift, char[] buf, int offset, int len); 145 }