jdk/src/share/classes/sun/reflect/UnsafeStaticFieldAccessorImpl.java
author michaelm
Thu, 24 Oct 2013 20:39:21 +0100
changeset 22339 e91bfaf4360d
parent 14684 dc1a2233ac21
child 23010 6dadb192ad81
permissions -rw-r--r--
8011786: Better applet networking Reviewed-by: alanb, chegar

/*
 * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package sun.reflect;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.security.AccessController;
import sun.misc.Unsafe;

/** Base class for sun.misc.Unsafe-based FieldAccessors for static
    fields. The observation is that there are only nine types of
    fields from the standpoint of reflection code: the eight primitive
    types and Object. Using class Unsafe instead of generated
    bytecodes saves memory and loading time for the
    dynamically-generated FieldAccessors. */

abstract class UnsafeStaticFieldAccessorImpl extends UnsafeFieldAccessorImpl {
    static {
        Reflection.registerFieldsToFilter(UnsafeStaticFieldAccessorImpl.class,
                                          new String[] { "base" });
    }

    protected final Object base; // base

    UnsafeStaticFieldAccessorImpl(Field field) {
        super(field);
        base = unsafe.staticFieldBase(field);
    }
}