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 MethodHandleObjectFieldAccessorImpl 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(Object.class));
38 if (setter != null) {
39 setter = setter.asType(MethodType.methodType(void.class, Object.class));
40 }
41 } else {
42 getter = getter.asType(MethodType.methodType(Object.class, Object.class));
43 if (setter != null) {
44 setter = setter.asType(MethodType.methodType(void.class, Object.class, Object.class));
45 }
46 }
47 return new MethodHandleObjectFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
48 }
49
50 MethodHandleObjectFieldAccessorImpl(Field field, MethodHandle getter, MethodHandle setter, boolean isReadOnly, boolean isStatic) {
51 super(field, getter, setter, isReadOnly, isStatic);
52 }
53
54 @Override
55 public Object get(Object obj) throws IllegalArgumentException {
56 try {
57 return isStatic() ? getter.invokeExact() : getter.invokeExact(obj);
58 } catch (IllegalArgumentException|NullPointerException e) {
59 throw e;
60 } catch (ClassCastException e) {
61 throw newGetIllegalArgumentException(obj);
62 } catch (Throwable e) {
63 throw new InternalError(e);
64 }
65 }
66
67 public boolean getBoolean(Object obj) throws IllegalArgumentException {
68 throw newGetBooleanIllegalArgumentException();
69 }
70
71 public byte getByte(Object obj) throws IllegalArgumentException {
72 throw newGetByteIllegalArgumentException();
73 }
74
75 public char getChar(Object obj) throws IllegalArgumentException {
76 throw newGetCharIllegalArgumentException();
77 }
78
79 public short getShort(Object obj) throws IllegalArgumentException {
80 throw newGetShortIllegalArgumentException();
81 }
82
83 public int getInt(Object obj) throws IllegalArgumentException {
84 throw newGetIntIllegalArgumentException();
85 }
86
87 public long getLong(Object obj) throws IllegalArgumentException {
88 throw newGetLongIllegalArgumentException();
89 }
90
91 public float getFloat(Object obj) throws IllegalArgumentException {
92 throw newGetFloatIllegalArgumentException();
93 }
94
95 public double getDouble(Object obj) throws IllegalArgumentException {
96 throw newGetDoubleIllegalArgumentException();
97 }
98
99 @Override
100 public void set(Object obj, Object value) throws IllegalAccessException {
101 ensureObj(obj);
102 if (isReadOnly()) {
103 throwFinalFieldIllegalAccessException(value);
104 }
105 try {
106 if (isStatic()) {
107 setter.invokeExact(value);
108 } else {
109 setter.invokeExact(obj, value);
110 }
111 } catch (IllegalArgumentException|NullPointerException e) {
112 throw e;
113 } catch (ClassCastException e) {
114 // already ensure the receiver type. So this CCE is due to the value.
115 throwSetIllegalArgumentException(value);
116 } catch (Throwable e) {
117 throw new InternalError(e);
118 }
119 }
120
121 public void setBoolean(Object obj, boolean z)
122 throws IllegalArgumentException, IllegalAccessException
123 {
124 throwSetIllegalArgumentException(z);
125 }
126
127 public void setByte(Object obj, byte b)
128 throws IllegalArgumentException, IllegalAccessException
129 {
130 throwSetIllegalArgumentException(b);
131 }
132
133 public void setChar(Object obj, char c)
134 throws IllegalArgumentException, IllegalAccessException
135 {
136 throwSetIllegalArgumentException(c);
137 }
138
139 public void setShort(Object obj, short s)
140 throws IllegalArgumentException, IllegalAccessException
141 {
142 throwSetIllegalArgumentException(s);
143 }
144
145 public void setInt(Object obj, int i)
146 throws IllegalArgumentException, IllegalAccessException
147 {
148 throwSetIllegalArgumentException(i);
149 }
150
151 public void setLong(Object obj, long l)
152 throws IllegalArgumentException, IllegalAccessException
153 {
154 throwSetIllegalArgumentException(l);
155 }
156
157 public void setFloat(Object obj, float f)
158 throws IllegalArgumentException, IllegalAccessException
159 {
160 throwSetIllegalArgumentException(f);
161 }
162
163 public void setDouble(Object obj, double d)
164 throws IllegalArgumentException, IllegalAccessException
165 {
166 throwSetIllegalArgumentException(d);
167 }
168 }