|
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 } |