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 MethodHandleFloatFieldAccessorImpl 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(float.class));
 38             if (setter != null) {
 39                 setter = setter.asType(MethodType.methodType(void.class, float.class));
 40             }
 41         } else {
 42             getter = getter.asType(MethodType.methodType(float.class, Object.class));
 43             if (setter != null) {
 44                 setter = setter.asType(MethodType.methodType(void.class, Object.class, float.class));
 45             }
 46         }
 47         return new MethodHandleFloatFieldAccessorImpl(field, getter, setter, isReadOnly, isStatic);
 48     }
 49 
 50     MethodHandleFloatFieldAccessorImpl(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 Float.valueOf(getFloat(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         try {
 84             if (isStatic()) {
 85                 return (float) getter.invokeExact();
 86             } else {
 87                 return (float) getter.invokeExact(obj);
 88             }
 89         } catch (IllegalArgumentException|NullPointerException e) {
 90             throw e;
 91         } catch (ClassCastException e) {
 92             throw newGetIllegalArgumentException(obj.getClass());
 93         } catch (Throwable e) {
 94             throw new InternalError(e);
 95         }
 96     }
 97 
 98     public double getDouble(Object obj) throws IllegalArgumentException {
 99         return getFloat(obj);
100     }
101 
102     public void set(Object obj, Object value)
103             throws IllegalArgumentException, IllegalAccessException
104     {
105         if (isReadOnly()) {
106             ensureObj(obj);     // throw NPE if obj is null on instance field
107             throwFinalFieldIllegalAccessException(value);
108         }
109 
110         if (value == null) {
111             throwSetIllegalArgumentException(value);
112         }
113 
114         if (value instanceof Byte b) {
115             setFloat(obj, b.byteValue());
116         }
117         else if (value instanceof Short s) {
118             setFloat(obj, s.shortValue());
119         }
120         else if (value instanceof Character c) {
121             setFloat(obj, c.charValue());
122         }
123         else if (value instanceof Integer i) {
124             setFloat(obj, i.intValue());
125         }
126         else if (value instanceof Long l) {
127             setFloat(obj, l.longValue());
128         }
129         else if (value instanceof Float f) {
130             setFloat(obj, f.floatValue());
131         }
132         else {
133             throwSetIllegalArgumentException(value);
134         }
135     }
136 
137     public void setBoolean(Object obj, boolean z)
138         throws IllegalArgumentException, IllegalAccessException
139     {
140         throwSetIllegalArgumentException(z);
141     }
142 
143     public void setByte(Object obj, byte b)
144         throws IllegalArgumentException, IllegalAccessException
145     {
146         setFloat(obj, b);
147     }
148 
149     public void setChar(Object obj, char c)
150         throws IllegalArgumentException, IllegalAccessException
151     {
152         setFloat(obj, c);
153     }
154 
155     public void setShort(Object obj, short s)
156         throws IllegalArgumentException, IllegalAccessException
157     {
158         setFloat(obj, s);
159     }
160 
161     public void setInt(Object obj, int i)
162         throws IllegalArgumentException, IllegalAccessException
163     {
164         setFloat(obj, i);
165     }
166 
167     public void setLong(Object obj, long l)
168         throws IllegalArgumentException, IllegalAccessException
169     {
170         setFloat(obj, l);
171     }
172 
173     public void setFloat(Object obj, float f)
174         throws IllegalArgumentException, IllegalAccessException
175     {
176         if (isReadOnly()) {
177             ensureObj(obj);     // throw NPE if obj is null on instance field
178             throwFinalFieldIllegalAccessException(f);
179         }
180         try {
181             if (isStatic()) {
182                 setter.invokeExact(f);
183             } else {
184                 setter.invokeExact(obj, f);
185             }
186         } catch (IllegalArgumentException|NullPointerException e) {
187             throw e;
188         } catch (ClassCastException e) {
189             throw newSetIllegalArgumentException(obj.getClass());
190         } catch (Throwable e) {
191             throw new InternalError(e);
192         }
193     }
194 
195     public void setDouble(Object obj, double d)
196         throws IllegalArgumentException, IllegalAccessException
197     {
198         throwSetIllegalArgumentException(d);
199     }
200 }