J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | } |