1 /*

     2  * Copyright (c) 2001, 2012, 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 final Object base; // base

    47 

    48     UnsafeStaticFieldAccessorImpl(Field field) {

    49         super(field);

    50         base = unsafe.staticFieldBase(field);

    51     }

    52 }