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    1   /*
    2    * Copyright (c) 2001, 2004, 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.reflect;
   27   
   28   import java.lang.reflect.Field;
   29   import java.lang.reflect.Modifier;
   30   import java.security.AccessController;
   31   import sun.misc.Unsafe;
   32   
   33   /** Base class for sun.misc.Unsafe-based FieldAccessors for static
   34       fields. The observation is that there are only nine types of
   35       fields from the standpoint of reflection code: the eight primitive
   36       types and Object. Using class Unsafe instead of generated
   37       bytecodes saves memory and loading time for the
   38       dynamically-generated FieldAccessors. */
   39   
   40   abstract class UnsafeStaticFieldAccessorImpl extends UnsafeFieldAccessorImpl {
   41       static {
   42           Reflection.registerFieldsToFilter(UnsafeStaticFieldAccessorImpl.class,
   43                                             new String[] { "base" });
   44       }
   45   
   46       protected Object base; // base
   47   
   48       UnsafeStaticFieldAccessorImpl(Field field) {
   49           super(field);
   50           base = unsafe.staticFieldBase(field);
   51       }
   52   }

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