java.lang.reflect.Field Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Copyright (C) 2012 RoboVM AB
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package java.lang.reflect;
import java.lang.annotation.Annotation;
import java.util.Comparator;
import libcore.reflect.GenericSignatureParser;
import libcore.reflect.Types;
import org.robovm.rt.VM;
/**
* This class represents a field. Information about the field can be accessed,
* and the field's value can be accessed dynamically.
*/
public final class Field extends AccessibleObject implements Member {
/**
* Orders fields by their name and declaring class.
*
* @hide
*/
public static final Comparator ORDER_BY_NAME_AND_DECLARING_CLASS
= new Comparator() {
@Override public int compare(Field a, Field b) {
int comparison = a.name.compareTo(b.name);
if (comparison != 0) {
return comparison;
}
return a.getDeclaringClass().getName().compareTo(b.getDeclaringClass().getName());
}
};
/*
* The RoboVM Field* object
*/
private final long field;
/*
* Cached fields
*/
private int modifiers = -1;
private Class declaringClass;
private String name;
private Class type;
private Annotation[] declaredAnnotations;
private Type genericType;
private volatile boolean genericTypesAreInitialized = false;
Field(long field){
this.field = field;
}
/**
* Construct a clone of the given instance.
*
* @param orig non-null; the original instance to clone
*/
/*package*/ Field(Field orig) {
this.field = orig.field;
this.modifiers = orig.modifiers;
this.declaringClass = orig.declaringClass;
this.name = orig.name;
this.type = orig.type;
this.genericType = orig.genericType;
this.genericTypesAreInitialized = orig.genericTypesAreInitialized;
this.declaredAnnotations = orig.declaredAnnotations;
// Copy the accessible flag.
if (orig.flag) {
this.flag = true;
}
}
private synchronized void initGenericType() {
if (!genericTypesAreInitialized) {
String signatureAttribute = getSignatureAttribute();
GenericSignatureParser parser = new GenericSignatureParser(
getDeclaringClass().getClassLoader());
parser.parseForField(this.getDeclaringClass(), signatureAttribute);
genericType = parser.fieldType;
if (genericType == null) {
genericType = getType();
}
genericTypesAreInitialized = true;
}
}
@Override
protected String getSignatureAttribute() {
return getSignatureAttribute(field);
}
private final native static String getSignatureAttribute(long field);
/**
* Indicates whether or not this field is synthetic.
*
* @return {@code true} if this field is synthetic, {@code false} otherwise
*/
public boolean isSynthetic() {
return (getModifiers() & Modifier.SYNTHETIC) != 0;
}
/**
* Returns the string representation of this field, including the field's
* generic type.
*
* @return the string representation of this field
*/
public String toGenericString() {
StringBuilder sb = new StringBuilder(80);
// append modifiers if any
int modifier = getModifiers();
if (modifier != 0) {
sb.append(Modifier.toString(modifier)).append(' ');
}
// append generic type
appendGenericType(sb, getGenericType());
sb.append(' ');
// append full field name
sb.append(getDeclaringClass().getName()).append('.').append(getName());
return sb.toString();
}
/**
* Indicates whether or not this field is an enumeration constant.
*
* @return {@code true} if this field is an enumeration constant, {@code
* false} otherwise
*/
public boolean isEnumConstant() {
return (getModifiers() & Modifier.ENUM) != 0;
}
/**
* Returns the generic type of this field.
*
* @return the generic type
* @throws GenericSignatureFormatError
* if the generic field signature is invalid
* @throws TypeNotPresentException
* if the generic type points to a missing type
* @throws MalformedParameterizedTypeException
* if the generic type points to a type that cannot be
* instantiated for some reason
*/
public Type getGenericType() {
initGenericType();
return Types.getType(genericType);
}
@Override
protected Annotation[] getDeclaredAnnotations(boolean copy) {
if (declaredAnnotations == null) {
declaredAnnotations = getDeclaredAnnotations(field);
}
return copy ? declaredAnnotations.clone() : declaredAnnotations;
}
private static final native Annotation[] getDeclaredAnnotations(long field);
/**
* Indicates whether or not the specified {@code object} is equal to this
* field. To be equal, the specified object must be an instance of
* {@code Field} with the same declaring class, type and name as this field.
*
* @param object
* the object to compare
* @return {@code true} if the specified object is equal to this method,
* {@code false} otherwise
* @see #hashCode
*/
@Override
public boolean equals(Object object) {
if (this == object) {
return true;
}
if (!(object instanceof Field)) {
return false;
}
Field rhs = (Field) object;
return getDeclaringClass().equals(rhs.getDeclaringClass()) &&
getType().equals(rhs.getType()) &&
getName().equals(rhs.getName());
}
private void checkAccess(Object receiver, boolean setter) throws IllegalAccessException {
if (!flag) {
int mod = getModifiers();
if (setter && (mod & Modifier.FINAL) > 0) {
throw new IllegalAccessException("Cannot set final field");
}
// Check access
if (!checkAccessibleFast(this)) {
Class caller = VM.getStackClasses(1, 1)[0];
if (!checkAccessible(caller, this)) {
throw new IllegalAccessException(String.format(
"Attempt to access field %s.%s from class %s",
getDeclaringClass().getName(), getName(), caller.getName()));
}
if ((getModifiers() & Modifier.PROTECTED) > 0) {
boolean isInstance = caller.isInstance(receiver);
boolean samePackage = isSamePackage(getDeclaringClass(), caller);
if (!isInstance && !samePackage) {
throw new IllegalAccessException(String.format(
"Attempt to access protected field %s.%s from class %s",
getDeclaringClass().getName(), getName(), caller.getName()));
}
}
}
}
}
private void checkReceiver(Object object) {
int mod = getModifiers();
if ((mod & Modifier.STATIC) == 0) {
if (object == null) {
throw new NullPointerException();
}
if (!getDeclaringClass().isInstance(object)) {
throw new IllegalArgumentException("Receiver is not compatible "
+ "with declaring class");
}
}
}
private void throwGetConversionException(Class fieldType, Class expectedType) {
throw new IllegalArgumentException("Cannot convert " + fieldType + " field "
+ getDeclaringClass().getName() + "." + getName() + " to "
+ expectedType);
}
private void throwSetConversionException(Class fieldType, Class valueType) {
throw new IllegalArgumentException("Cannot set " + fieldType + " field "
+ getDeclaringClass().getName() + "." + getName() + " to "
+ valueType);
}
private double getDouble(Object object, Class fieldType, Class expectedType) {
if (fieldType == Double.TYPE) {
return getD(object, field);
}
return getFloat(object, fieldType, expectedType);
}
private float getFloat(Object object, Class fieldType, Class expectedType) {
if (fieldType == Float.TYPE) {
return getF(object, field);
}
return getLong(object, fieldType, expectedType);
}
private long getLong(Object object, Class fieldType, Class expectedType) {
if (fieldType == Long.TYPE) {
return getJ(object, field);
}
return getInt(object, fieldType, expectedType);
}
private int getInt(Object object, Class fieldType, Class expectedType) {
if (fieldType == Integer.TYPE) {
return getI(object, field);
}
if (fieldType == Character.TYPE) {
return getC(object, field);
}
return getShort(object, fieldType, expectedType);
}
private char getChar(Object object, Class fieldType, Class expectedType) {
if (fieldType == Character.TYPE) {
return getC(object, field);
}
throwGetConversionException(fieldType, expectedType);
return 0;
}
private short getShort(Object object, Class fieldType, Class expectedType) {
if (fieldType == Short.TYPE) {
return getS(object, field);
}
return getByte(object, fieldType, expectedType);
}
private byte getByte(Object object, Class fieldType, Class expectedType) {
if (fieldType == Byte.TYPE) {
return getB(object, field);
}
throwGetConversionException(fieldType, expectedType);
return 0;
}
private boolean getBoolean(Object object, Class fieldType, Class expectedType) {
if (fieldType == Boolean.TYPE) {
return getZ(object, field);
}
throwGetConversionException(fieldType, expectedType);
return false;
}
private void setDouble(Object object, double value, Class fieldType, Class valueType) {
if (fieldType == Double.TYPE) {
setD(object, field, value);
} else {
throwSetConversionException(fieldType, valueType);
}
}
private void setFloat(Object object, float value, Class fieldType, Class valueType) {
if (fieldType == Float.TYPE) {
setF(object, field, value);
} else {
setDouble(object, value, fieldType, valueType);
}
}
private void setLong(Object object, long value, Class fieldType, Class valueType) {
if (fieldType == Long.TYPE) {
setJ(object, field, value);
} else {
setFloat(object, value, fieldType, valueType);
}
}
private void setInt(Object object, int value, Class fieldType, Class valueType) {
if (fieldType == Integer.TYPE) {
setI(object, field, value);
} else {
setLong(object, value, fieldType, valueType);
}
}
private void setChar(Object object, char value, Class fieldType, Class valueType) {
if (fieldType == Character.TYPE) {
setC(object, field, value);
} else {
setInt(object, value, fieldType, valueType);
}
}
private void setShort(Object object, short value, Class fieldType, Class valueType) {
if (fieldType == Short.TYPE) {
setS(object, field, value);
} else {
setInt(object, value, fieldType, valueType);
}
}
private void setByte(Object object, byte value, Class fieldType, Class valueType) {
if (fieldType == Byte.TYPE) {
setB(object, field, value);
} else {
setShort(object, value, fieldType, valueType);
}
}
private void setBoolean(Object object, boolean value, Class fieldType, Class valueType) {
if (fieldType == Boolean.TYPE) {
setZ(object, field, value);
} else {
throwSetConversionException(fieldType, valueType);
}
}
/**
* Returns the value of the field in the specified object. This reproduces
* the effect of {@code object.fieldName}
*
* If the type of this field is a primitive type, the field value is
* automatically boxed.
*
*
If this field is static, the object argument is ignored.
* Otherwise, if the object is null, a NullPointerException is thrown. If
* the object is not an instance of the declaring class of the method, an
* IllegalArgumentException is thrown.
*
*
If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value, possibly boxed
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public Object get(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
Class type = getType();
if (type.isPrimitive()) {
if (type == Boolean.TYPE) {
return Boolean.valueOf(getZ(object, field));
}
if (type == Byte.TYPE) {
return Byte.valueOf(getB(object, field));
}
if (type == Short.TYPE) {
return Short.valueOf(getS(object, field));
}
if (type == Character.TYPE) {
return Character.valueOf(getC(object, field));
}
if (type == Integer.TYPE) {
return Integer.valueOf(getI(object, field));
}
if (type == Long.TYPE) {
return Long.valueOf(getJ(object, field));
}
if (type == Float.TYPE) {
return Float.valueOf(getF(object, field));
}
if (type == Double.TYPE) {
return Double.valueOf(getD(object, field));
}
}
return getL(object, field);
}
/**
* Returns the value of the field in the specified object as a {@code
* boolean}. This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public boolean getBoolean(Object object)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getBoolean(object, getType(), Boolean.TYPE);
}
/**
* Returns the value of the field in the specified object as a {@code byte}.
* This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public byte getByte(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getByte(object, getType(), Byte.TYPE);
}
/**
* Returns the value of the field in the specified object as a {@code char}.
* This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public char getChar(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getChar(object, getType(), Character.TYPE);
}
/**
* Returns the class that declares this field.
*
* @return the declaring class
*/
public Class getDeclaringClass() {
if (declaringClass == null) {
declaringClass = getDeclaringClass(field);
}
return declaringClass;
}
native static Class getDeclaringClass(long field);
/**
* Returns the value of the field in the specified object as a {@code
* double}. This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public double getDouble(Object object)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getDouble(object, getType(), Double.TYPE);
}
/**
* Returns the value of the field in the specified object as a {@code float}.
* This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public float getFloat(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getFloat(object, getType(), Float.TYPE);
}
/**
* Returns the value of the field in the specified object as an {@code int}.
* This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public int getInt(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getInt(object, getType(), Integer.TYPE);
}
/**
* Returns the value of the field in the specified object as a {@code long}.
* This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public long getLong(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getLong(object, getType(), Long.TYPE);
}
/**
* Returns the modifiers for this field. The {@link Modifier} class should
* be used to decode the result.
*
* @return the modifiers for this field
* @see Modifier
*/
public int getModifiers() {
if (modifiers == -1) {
modifiers = getModifiers(field);
}
return modifiers;
}
private native static int getModifiers(long field);
/**
* Returns the name of this field.
*
* @return the name of this field
*/
public String getName() {
if (name == null) {
name = getName(field);
}
return name;
}
private native static String getName(long field);
/**
* Returns the value of the field in the specified object as a {@code short}
* . This reproduces the effect of {@code object.fieldName}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* @param object
* the object to access
* @return the field value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public short getShort(Object object) throws IllegalAccessException,
IllegalArgumentException {
checkAccess(object, false);
checkReceiver(object);
return getShort(object, getType(), Short.TYPE);
}
/**
* Returns the constructor's signature in non-printable form. This is called
* (only) from IO native code and needed for deriving the serialVersionUID
* of the class
*
* @return the constructor's signature.
*/
@SuppressWarnings("unused")
private String getSignature() {
return getSignature(type);
}
/**
* Return the {@link Class} associated with the type of this field.
*
* @return the type of this field
*/
public Class getType() {
if (type == null) {
type = getType(field);
}
return type;
}
private native static Class getType(long field);
/**
* Returns an integer hash code for this field. Objects which are equal
* return the same value for this method.
*
* The hash code for a Field is the exclusive-or combination of the hash
* code of the field's name and the hash code of the name of its declaring
* class.
*
* @return the hash code for this field
* @see #equals
*/
@Override
public int hashCode() {
return getName().hashCode() ^ getDeclaringClass().getName().hashCode();
}
/**
* Sets the value of the field in the specified object to the value. This
* reproduces the effect of {@code object.fieldName = value}
*
*
If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
*
If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
*
If the field type is a primitive type, the value is automatically
* unboxed. If the unboxing fails, an IllegalArgumentException is thrown. If
* the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void set(Object object, Object value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
Class type = getType();
if (type.isPrimitive()) {
if (value == null) {
throwSetConversionException(type, null);
}
if (value instanceof Boolean) {
setBoolean(object, ((Boolean) value).booleanValue(), type, Boolean.TYPE);
} else if (value instanceof Byte) {
setByte(object, ((Byte) value).byteValue(), type, Byte.TYPE);
} else if (value instanceof Short) {
setShort(object, ((Short) value).shortValue(), type, Short.TYPE);
} else if (value instanceof Character) {
setChar(object, ((Character) value).charValue(), type, Character.TYPE);
} else if (value instanceof Integer) {
setInt(object, ((Integer) value).intValue(), type, Integer.TYPE);
} else if (value instanceof Long) {
setLong(object, ((Long) value).longValue(), type, Long.TYPE);
} else if (value instanceof Float) {
setFloat(object, ((Float) value).floatValue(), type, Float.TYPE);
} else if (value instanceof Double) {
setDouble(object, ((Double) value).doubleValue(), type, Double.TYPE);
} else {
throwSetConversionException(type, value.getClass());
}
} else {
if (value != null && !getType().isInstance(value)) {
throw new IllegalArgumentException(
String.format("Can not set %s field %s.%s to %s",
getType().getName(), getDeclaringClass().getName(),
getName(), value.getClass().getName()));
}
setL(object, field, value);
}
}
/**
* Sets the value of the field in the specified object to the {@code
* boolean} value. This reproduces the effect of {@code object.fieldName =
* value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setBoolean(Object object, boolean value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setBoolean(object, value, getType(), Boolean.TYPE);
}
/**
* Sets the value of the field in the specified object to the {@code byte}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setByte(Object object, byte value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setByte(object, value, getType(), Byte.TYPE);
}
/**
* Sets the value of the field in the specified object to the {@code char}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setChar(Object object, char value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setChar(object, value, getType(), Character.TYPE);
}
/**
* Sets the value of the field in the specified object to the {@code double}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setDouble(Object object, double value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setDouble(object, value, getType(), Double.TYPE);
}
/**
* Sets the value of the field in the specified object to the {@code float}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setFloat(Object object, float value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setFloat(object, value, getType(), Float.TYPE);
}
/**
* Set the value of the field in the specified object to the {@code int}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setInt(Object object, int value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setInt(object, value, getType(), Integer.TYPE);
}
/**
* Sets the value of the field in the specified object to the {@code long}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setLong(Object object, long value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setLong(object, value, getType(), Long.TYPE);
}
/**
* Sets the value of the field in the specified object to the {@code short}
* value. This reproduces the effect of {@code object.fieldName = value}
*
* If this field is static, the object argument is ignored.
* Otherwise, if the object is {@code null}, a NullPointerException is
* thrown. If the object is not an instance of the declaring class of the
* method, an IllegalArgumentException is thrown.
*
* If this Field object is enforcing access control (see AccessibleObject)
* and this field is not accessible from the current context, an
* IllegalAccessException is thrown.
*
* If the value cannot be converted to the field type via a widening
* conversion, an IllegalArgumentException is thrown.
*
* @param object
* the object to access
* @param value
* the new value
* @throws NullPointerException
* if the object is {@code null} and the field is non-static
* @throws IllegalArgumentException
* if the object is not compatible with the declaring class
* @throws IllegalAccessException
* if this field is not accessible
*/
public void setShort(Object object, short value)
throws IllegalAccessException, IllegalArgumentException {
checkAccess(object, true);
checkReceiver(object);
setShort(object, value, getType(), Short.TYPE);
}
/**
* Returns a string containing a concise, human-readable description of this
* field.
*
* The format of the string is:
*
* - modifiers (if any)
*
- type
*
- declaring class name
*
- '.'
*
- field name
*
*
* For example: {@code public static java.io.InputStream
* java.lang.System.in}
*
* @return a printable representation for this field
*/
@Override
public String toString() {
Class type = getType();
Class declaringClass = getDeclaringClass();
String name = getName();
StringBuilder result = new StringBuilder(Modifier.toString(getModifiers()));
if (result.length() != 0) {
result.append(' ');
}
appendTypeName(result, type);
result.append(' ');
appendTypeName(result, declaringClass);
result.append('.');
result.append(name);
return result.toString();
}
private static native boolean getZ(Object o, long field);
private static native byte getB(Object o, long field);
private static native char getC(Object o, long field);
private static native short getS(Object o, long field);
private static native int getI(Object o, long field);
private static native long getJ(Object o, long field);
private static native float getF(Object o, long field);
private static native double getD(Object o, long field);
private static native Object getL(Object o, long field);
private static native void setZ(Object o, long field, boolean value);
private static native void setB(Object o, long field, byte value);
private static native void setC(Object o, long field, char value);
private static native void setS(Object o, long field, short value);
private static native void setI(Object o, long field, int value);
private static native void setJ(Object o, long field, long value);
private static native void setF(Object o, long field, float value);
private static native void setD(Object o, long field, double value);
private static native void setL(Object o, long field, Object value);
}