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 sun.misc;
  27 
  28 import java.lang.annotation.Annotation;
  29 import java.lang.reflect.Executable;
  30 import sun.reflect.ConstantPool;
  31 import sun.reflect.annotation.AnnotationType;
  32 import sun.nio.ch.Interruptible;
  33 
  34 public interface JavaLangAccess {
  35     /** Return the constant pool for a class. */
  36     ConstantPool getConstantPool(Class<?> klass);
  37 
  38     /**
  39      * Compare-And-Swap the AnnotationType instance corresponding to this class.
  40      * (This method only applies to annotation types.)
  41      */
  42     boolean casAnnotationType(Class<?> klass, AnnotationType oldType, AnnotationType newType);
  43 
  44     /**
  45      * Get the AnnotationType instance corresponding to this class.
  46      * (This method only applies to annotation types.)
  47      */
  48     AnnotationType getAnnotationType(Class<?> klass);
  49 
  50     /**
  51      * Get the array of bytes that is the class-file representation
  52      * of this Class' annotations.
  53      */
  54     byte[] getRawClassAnnotations(Class<?> klass);
  55 
  56     /**
  57      * Get the array of bytes that is the class-file representation
  58      * of this Class' type annotations.
  59      */
  60     byte[] getRawClassTypeAnnotations(Class<?> klass);
  61 
  62     /**
  63      * Get the array of bytes that is the class-file representation
  64      * of this Executable's type annotations.
  65      */
  66     byte[] getRawExecutableTypeAnnotations(Executable executable);
  67 
  68     /**
  69      * Returns the elements of an enum class or null if the
  70      * Class object does not represent an enum type;
  71      * the result is uncloned, cached, and shared by all callers.
  72      */
  73     <E extends Enum<E>> E[] getEnumConstantsShared(Class<E> klass);
  74 
  75     /** Set thread's blocker field. */
  76     void blockedOn(Thread t, Interruptible b);
  77 
  78     /**
  79      * Registers a shutdown hook.
  80      *
  81      * It is expected that this method with registerShutdownInProgress=true
  82      * is only used to register DeleteOnExitHook since the first file
  83      * may be added to the delete on exit list by the application shutdown
  84      * hooks.
  85      *
  86      * @params slot  the slot in the shutdown hook array, whose element
  87      *               will be invoked in order during shutdown
  88      * @params registerShutdownInProgress true to allow the hook
  89      *               to be registered even if the shutdown is in progress.
  90      * @params hook  the hook to be registered
  91      *
  92      * @throw IllegalStateException if shutdown is in progress and
  93      *          the slot is not valid to register.
  94      */
  95     void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook);
  96 
  97     /**
  98      * Returns the number of stack frames represented by the given throwable.
  99      */
 100     int getStackTraceDepth(Throwable t);
 101 
 102     /**
 103      * Returns the ith StackTraceElement for the given throwable.
 104      */
 105     StackTraceElement getStackTraceElement(Throwable t, int i);
 106 
 107     /**
 108      * Returns a new string backed by the provided character array. The
 109      * character array is not copied and must never be modified after the
 110      * String is created, in order to fulfill String's contract.
 111      *
 112      * @param chars the character array to back the string
 113      * @return a newly created string whose content is the character array
 114      */
 115     String newStringUnsafe(char[] chars);
 116 }