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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 | } | ||