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| 1 | /* | ||
| 2 | * Copyright (c) 2001, 2005, 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 sun.misc.Unsafe; | ||
| 31 | |||
| 32 | /** Base class for sun.misc.Unsafe-based FieldAccessors. The | ||
| 33 | observation is that there are only nine types of fields from the | ||
| 34 | standpoint of reflection code: the eight primitive types and | ||
| 35 | Object. Using class Unsafe instead of generated bytecodes saves | ||
| 36 | memory and loading time for the dynamically-generated | ||
| 37 | FieldAccessors. */ | ||
| 38 | |||
| 39 | abstract class UnsafeFieldAccessorImpl extends FieldAccessorImpl { | ||
| 40 | static final Unsafe unsafe = Unsafe.getUnsafe(); | ||
| 41 | |||
| 42 | protected final Field field; | ||
| 43 | protected final int fieldOffset; | ||
| 44 | protected final boolean isFinal; | ||
| 45 | |||
| 46 | UnsafeFieldAccessorImpl(Field field) { | ||
| 47 | this.field = field; | ||
| 48 | fieldOffset = unsafe.fieldOffset(field); | ||
| 49 | isFinal = Modifier.isFinal(field.getModifiers()); | ||
| 50 | } | ||
| 51 | |||
| 52 | protected void ensureObj(Object o) { | ||
| 53 | // NOTE: will throw NullPointerException, as specified, if o is null | ||
| 54 | if (!field.getDeclaringClass().isAssignableFrom(o.getClass())) { | ||
| 55 | throwSetIllegalArgumentException(o); | ||
| 56 | } | ||
| 57 | } | ||
| 58 | |||
| 59 | private String getQualifiedFieldName() { | ||
| 60 | return field.getDeclaringClass().getName() + "." +field.getName(); | ||
| 61 | } | ||
| 62 | |||
| 63 | protected IllegalArgumentException newGetIllegalArgumentException(String type) { | ||
| 64 | return new IllegalArgumentException( | ||
| 65 | "Attempt to get "+field.getType().getName()+" field \"" + | ||
| 66 | getQualifiedFieldName() + "\" with illegal data type conversion to "+type | ||
| 67 | ); | ||
| 68 | } | ||
| 69 | |||
| 70 | protected void throwFinalFieldIllegalAccessException(String attemptedType, | ||
| 71 | String attemptedValue) | ||
| 72 | throws IllegalAccessException { | ||
| 73 | throw new IllegalAccessException(getSetMessage(attemptedType, attemptedValue)); | ||
| 74 | |||
| 75 | } | ||
| 76 | protected void throwFinalFieldIllegalAccessException(Object o) throws IllegalAccessException { | ||
| 77 | throwFinalFieldIllegalAccessException(o != null ? o.getClass().getName() : "", ""); | ||
| 78 | } | ||
| 79 | |||
| 80 | protected void throwFinalFieldIllegalAccessException(boolean z) throws IllegalAccessException { | ||
| 81 | throwFinalFieldIllegalAccessException("boolean", Boolean.toString(z)); | ||
| 82 | } | ||
| 83 | |||
| 84 | protected void throwFinalFieldIllegalAccessException(char b) throws IllegalAccessException { | ||
| 85 | throwFinalFieldIllegalAccessException("char", Character.toString(b)); | ||
| 86 | } | ||
| 87 | |||
| 88 | protected void throwFinalFieldIllegalAccessException(byte b) throws IllegalAccessException { | ||
| 89 | throwFinalFieldIllegalAccessException("byte", Byte.toString(b)); | ||
| 90 | } | ||
| 91 | |||
| 92 | protected void throwFinalFieldIllegalAccessException(short b) throws IllegalAccessException { | ||
| 93 | throwFinalFieldIllegalAccessException("short", Short.toString(b)); | ||
| 94 | } | ||
| 95 | |||
| 96 | protected void throwFinalFieldIllegalAccessException(int i) throws IllegalAccessException { | ||
| 97 | throwFinalFieldIllegalAccessException("int", Integer.toString(i)); | ||
| 98 | } | ||
| 99 | |||
| 100 | protected void throwFinalFieldIllegalAccessException(long i) throws IllegalAccessException { | ||
| 101 | throwFinalFieldIllegalAccessException("long", Long.toString(i)); | ||
| 102 | } | ||
| 103 | |||
| 104 | protected void throwFinalFieldIllegalAccessException(float f) throws IllegalAccessException { | ||
| 105 | throwFinalFieldIllegalAccessException("float", Float.toString(f)); | ||
| 106 | } | ||
| 107 | |||
| 108 | protected void throwFinalFieldIllegalAccessException(double f) throws IllegalAccessException { | ||
| 109 | throwFinalFieldIllegalAccessException("double", Double.toString(f)); | ||
| 110 | } | ||
| 111 | |||
| 112 | protected IllegalArgumentException newGetBooleanIllegalArgumentException() { | ||
| 113 | return newGetIllegalArgumentException("boolean"); | ||
| 114 | } | ||
| 115 | |||
| 116 | protected IllegalArgumentException newGetByteIllegalArgumentException() { | ||
| 117 | return newGetIllegalArgumentException("byte"); | ||
| 118 | } | ||
| 119 | |||
| 120 | protected IllegalArgumentException newGetCharIllegalArgumentException() { | ||
| 121 | return newGetIllegalArgumentException("char"); | ||
| 122 | } | ||
| 123 | |||
| 124 | protected IllegalArgumentException newGetShortIllegalArgumentException() { | ||
| 125 | return newGetIllegalArgumentException("short"); | ||
| 126 | } | ||
| 127 | |||
| 128 | protected IllegalArgumentException newGetIntIllegalArgumentException() { | ||
| 129 | return newGetIllegalArgumentException("int"); | ||
| 130 | } | ||
| 131 | |||
| 132 | protected IllegalArgumentException newGetLongIllegalArgumentException() { | ||
| 133 | return newGetIllegalArgumentException("long"); | ||
| 134 | } | ||
| 135 | |||
| 136 | protected IllegalArgumentException newGetFloatIllegalArgumentException() { | ||
| 137 | return newGetIllegalArgumentException("float"); | ||
| 138 | } | ||
| 139 | |||
| 140 | protected IllegalArgumentException newGetDoubleIllegalArgumentException() { | ||
| 141 | return newGetIllegalArgumentException("double"); | ||
| 142 | } | ||
| 143 | |||
| 144 | protected String getSetMessage(String attemptedType, String attemptedValue) { | ||
| 145 | String err = "Can not set"; | ||
| 146 | if (Modifier.isStatic(field.getModifiers())) | ||
| 147 | err += " static"; | ||
| 148 | if (isFinal) | ||
| 149 | err += " final"; | ||
| 150 | err += " " + field.getType().getName() + " field " + getQualifiedFieldName() + " to "; | ||
| 151 | if (attemptedValue.length() > 0) { | ||
| 152 | err += "(" + attemptedType + ")" + attemptedValue; | ||
| 153 | } else { | ||
| 154 | if (attemptedType.length() > 0) | ||
| 155 | err += attemptedType; | ||
| 156 | else | ||
| 157 | err += "null value"; | ||
| 158 | } | ||
| 159 | return err; | ||
| 160 | } | ||
| 161 | |||
| 162 | protected void throwSetIllegalArgumentException(String attemptedType, | ||
| 163 | String attemptedValue) { | ||
| 164 | throw new IllegalArgumentException(getSetMessage(attemptedType,attemptedValue)); | ||
| 165 | } | ||
| 166 | |||
| 167 | protected void throwSetIllegalArgumentException(Object o) { | ||
| 168 | throwSetIllegalArgumentException(o != null ? o.getClass().getName() : "", ""); | ||
| 169 | } | ||
| 170 | |||
| 171 | protected void throwSetIllegalArgumentException(boolean b) { | ||
| 172 | throwSetIllegalArgumentException("boolean", Boolean.toString(b)); | ||
| 173 | } | ||
| 174 | |||
| 175 | protected void throwSetIllegalArgumentException(byte b) { | ||
| 176 | throwSetIllegalArgumentException("byte", Byte.toString(b)); | ||
| 177 | } | ||
| 178 | |||
| 179 | protected void throwSetIllegalArgumentException(char c) { | ||
| 180 | throwSetIllegalArgumentException("char", Character.toString(c)); | ||
| 181 | } | ||
| 182 | |||
| 183 | protected void throwSetIllegalArgumentException(short s) { | ||
| 184 | throwSetIllegalArgumentException("short", Short.toString(s)); | ||
| 185 | } | ||
| 186 | |||
| 187 | protected void throwSetIllegalArgumentException(int i) { | ||
| 188 | throwSetIllegalArgumentException("int", Integer.toString(i)); | ||
| 189 | } | ||
| 190 | |||
| 191 | protected void throwSetIllegalArgumentException(long l) { | ||
| 192 | throwSetIllegalArgumentException("long", Long.toString(l)); | ||
| 193 | } | ||
| 194 | |||
| 195 | protected void throwSetIllegalArgumentException(float f) { | ||
| 196 | throwSetIllegalArgumentException("float", Float.toString(f)); | ||
| 197 | } | ||
| 198 | |||
| 199 | protected void throwSetIllegalArgumentException(double d) { | ||
| 200 | throwSetIllegalArgumentException("double", Double.toString(d)); | ||
| 201 | } | ||
| 202 | |||
| 203 | } | ||