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 MethodHandleIntegerFieldAccessorImpl 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(int.class));
38 if (setter != null) {
39 setter = setter.asType(MethodType.methodType(void.class, int.class));
40 }
41 } else {
42 getter = getter.asType(MethodType.methodType(int.class, Object.class));
43 if (setter != null) {
44 setter = setter.asType(MethodType.methodType(void.class, Object.class, int.class));
45 }
46 }
47 return new MethodHandleIntegerFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
48 }
49
50 MethodHandleIntegerFieldAccessorImpl(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 Integer.valueOf(getInt(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 try {
76 if (isStatic()) {
77 return (int) getter.invokeExact();
78 } else {
79 return (int) getter.invokeExact(obj);
80 }
81 } catch (IllegalArgumentException|NullPointerException e) {
82 throw e;
83 } catch (ClassCastException e) {
84 throw newGetIllegalArgumentException(obj);
85 } catch (Throwable e) {
86 throw new InternalError(e);
87 }
88 }
89
90 public long getLong(Object obj) throws IllegalArgumentException {
91 return getInt(obj);
92 }
93
94 public float getFloat(Object obj) throws IllegalArgumentException {
95 return getInt(obj);
96 }
97
98 public double getDouble(Object obj) throws IllegalArgumentException {
99 return getInt(obj);
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 setInt(obj, b.byteValue());
116 }
117 else if (value instanceof Short s) {
118 setInt(obj, s.shortValue());
119 }
120 else if (value instanceof Character c) {
121 setInt(obj, c.charValue());
122 }
123 else if (value instanceof Integer i) {
124 setInt(obj, i.intValue());
125 }
126 else {
127 throwSetIllegalArgumentException(value);
128 }
129 }
130
131 public void setBoolean(Object obj, boolean z)
132 throws IllegalArgumentException, IllegalAccessException
133 {
134 throwSetIllegalArgumentException(z);
135 }
136
137 public void setByte(Object obj, byte b)
138 throws IllegalArgumentException, IllegalAccessException
139 {
140 setInt(obj, b);
141 }
142
143 public void setChar(Object obj, char c)
144 throws IllegalArgumentException, IllegalAccessException
145 {
146 setInt(obj, c);
147 }
148
149 public void setShort(Object obj, short s)
150 throws IllegalArgumentException, IllegalAccessException
151 {
152 setInt(obj, s);
153 }
154
155 public void setInt(Object obj, int i)
156 throws IllegalArgumentException, IllegalAccessException
157 {
158 if (isReadOnly()) {
159 ensureObj(obj); // throw NPE if obj is null on instance field
160 throwFinalFieldIllegalAccessException(i);
161 }
162 try {
163 if (isStatic()) {
164 setter.invokeExact(i);
165 } else {
166 setter.invokeExact(obj, i);
167 }
168 } catch (IllegalArgumentException|NullPointerException e) {
169 throw e;
170 } catch (ClassCastException e) {
171 // receiver is of invalid type
172 throw newSetIllegalArgumentException(obj);
173 } catch (Throwable e) {
174 throw new InternalError(e);
175 }
176 }
177
178 public void setLong(Object obj, long l)
179 throws IllegalArgumentException, IllegalAccessException
180 {
181 throwSetIllegalArgumentException(l);
182 }
183
184 public void setFloat(Object obj, float f)
185 throws IllegalArgumentException, IllegalAccessException
186 {
187 throwSetIllegalArgumentException(f);
188 }
189
190 public void setDouble(Object obj, double d)
191 throws IllegalArgumentException, IllegalAccessException
192 {
193 throwSetIllegalArgumentException(d);
194 }
195 }