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 jdk.internal.misc.Unsafe; 32 33 /** Base class for jdk.internal.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 }