1 /*
2 * Copyright (c) 2021, 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 jdk.internal.reflect;
27
28 import java.lang.invoke.MethodHandle;
29 import java.lang.invoke.MethodType;
30 import java.lang.reflect.Field;
31 import java.lang.reflect.Modifier;
32
33 class MethodHandleDoubleFieldAccessorImpl extends MethodHandleFieldAccessorImpl {
34 static FieldAccessorImpl fieldAccessor(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly) {
35 boolean isStatic = Modifier.isStatic(field.getModifiers());
36 if (isStatic) {
37 getter = getter.asType(MethodType.methodType(double.class));
38 if (setter != null) {
39 setter = setter.asType(MethodType.methodType(void.class, double.class));
40 }
41 } else {
42 getter = getter.asType(MethodType.methodType(double.class, Object.class));
43 if (setter != null) {
44 setter = setter.asType(MethodType.methodType(void.class, Object.class, double.class));
45 }
46 }
47 return new MethodHandleDoubleFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
48 }
49
50 MethodHandleDoubleFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
51 super(field, getter, setter, isReadOnly, isStatic);
52 }
53
54 public Object get(Object obj) throws IllegalArgumentException {
55 return Double.valueOf(getDouble(obj));
56 }
57
58 public boolean getBoolean(Object obj) throws IllegalArgumentException {
59 throw newGetBooleanIllegalArgumentException();
60 }
61
62 public byte getByte(Object obj) throws IllegalArgumentException {
63 throw newGetByteIllegalArgumentException();
64 }
65
66 public char getChar(Object obj) throws IllegalArgumentException {
67 throw newGetCharIllegalArgumentException();
68 }
69
70 public short getShort(Object obj) throws IllegalArgumentException {
71 throw newGetShortIllegalArgumentException();
72 }
73
74 public int getInt(Object obj) throws IllegalArgumentException {
75 throw newGetIntIllegalArgumentException();
76 }
77
78 public long getLong(Object obj) throws IllegalArgumentException {
79 throw newGetLongIllegalArgumentException();
80 }
81
82 public float getFloat(Object obj) throws IllegalArgumentException {
83 throw newGetFloatIllegalArgumentException();
84 }
85
86 public double getDouble(Object obj) throws IllegalArgumentException {
87 try {
88 if (isStatic()) {
89 return (double) getter.invokeExact();
90 } else {
91 return (double) getter.invokeExact(obj);
92 }
93 } catch (IllegalArgumentException|IllegalStateException|NullPointerException e) {
94 throw e;
95 } catch (ClassCastException e) {
96 throw newGetIllegalArgumentException(obj);
97 } catch (Throwable e) {
98 throw new InternalError(e);
99 }
100 }
101
102 public void set(Object obj, Object value)
103 throws IllegalArgumentException, IllegalAccessException
104 {
105 ensureObj(obj);
106 if (isReadOnly()) {
107 throwFinalFieldIllegalAccessException(value);
108 }
109
110 if (value == null) {
111 throwSetIllegalArgumentException(value);
112 }
113
114 if (value instanceof Byte b) {
115 setDouble(obj, b.byteValue());
116 }
117 else if (value instanceof Short s) {
118 setDouble(obj, s.shortValue());
119 }
120 else if (value instanceof Character c) {
121 setDouble(obj, c.charValue());
122 }
123 else if (value instanceof Integer i) {
124 setDouble(obj, i.intValue());
125 }
126 else if (value instanceof Long l) {
127 setDouble(obj, l.longValue());
128 }
129 else if (value instanceof Float f) {
130 setDouble(obj, f.floatValue());
131 }
132 else if (value instanceof Double d) {
133 setDouble(obj, d.doubleValue());
134 }
135 else {
136 throwSetIllegalArgumentException(value);
137 }
138 }
139
140 public void setBoolean(Object obj, boolean z)
141 throws IllegalArgumentException, IllegalAccessException
142 {
143 throwSetIllegalArgumentException(z);
144 }
145
146 public void setByte(Object obj, byte b)
147 throws IllegalArgumentException, IllegalAccessException
148 {
149 setDouble(obj, b);
150 }
151
152 public void setChar(Object obj, char c)
153 throws IllegalArgumentException, IllegalAccessException
154 {
155 setDouble(obj, c);
156 }
157
158 public void setShort(Object obj, short s)
159 throws IllegalArgumentException, IllegalAccessException
160 {
161 setDouble(obj, s);
162 }
163
164 public void setInt(Object obj, int i)
165 throws IllegalArgumentException, IllegalAccessException
166 {
167 setDouble(obj, i);
168 }
169
170 public void setLong(Object obj, long l)
171 throws IllegalArgumentException, IllegalAccessException
172 {
173 setDouble(obj, l);
174 }
175
176 public void setFloat(Object obj, float f)
177 throws IllegalArgumentException, IllegalAccessException
178 {
179 setDouble(obj, f);
180 }
181
182 public void setDouble(Object obj, double d)
183 throws IllegalArgumentException, IllegalAccessException
184 {
185 if (isReadOnly()) {
186 ensureObj(obj); // throw NPE if obj is null on instance field
187 throwFinalFieldIllegalAccessException(d);
188 }
189 try {
190 if (isStatic()) {
191 setter.invokeExact(d);
192 } else {
193 setter.invokeExact(obj, d);
194 }
195 } catch (IllegalArgumentException|IllegalStateException|NullPointerException e) {
196 throw e;
197 } catch (ClassCastException e) {
198 // receiver is of invalid type
199 throw newSetIllegalArgumentException(obj);
200 } catch (Throwable e) {
201 throw new InternalError(e);
202 }
203 }
204 }