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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 | +} | |