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/*
* Copyright (C) 2014 The Android Open Source Project
* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.lang.reflect;
import dalvik.annotation.optimization.FastNative;
import sun.reflect.CallerSensitive;
import java.lang.annotation.Annotation;
import java.util.Objects;
import libcore.reflect.AnnotatedElements;
import libcore.reflect.GenericSignatureParser;
/**
* A {@code Field} provides information about, and dynamic access to, a
* single field of a class or an interface. The reflected field may
* be a class (static) field or an instance field.
*
* A {@code Field} permits widening conversions to occur during a get or
* set access operation, but throws an {@code IllegalArgumentException} if a
* narrowing conversion would occur.
*
* @see Member
* @see java.lang.Class
* @see java.lang.Class#getFields()
* @see java.lang.Class#getField(String)
* @see java.lang.Class#getDeclaredFields()
* @see java.lang.Class#getDeclaredField(String)
*
* @author Kenneth Russell
* @author Nakul Saraiya
*/
public final
class Field extends AccessibleObject implements Member {
// Android-changed: Extensive modifications made throughout the class for ART.
// Android-changed: Many fields and methods removed / modified.
// Android-removed: Type annotations runtime code. Not supported on Android.
private int accessFlags;
private Class declaringClass;
private int artFieldIndex;
private int offset;
private Class type;
private Field() {
}
/**
* Returns the {@code Class} object representing the class or interface
* that declares the field represented by this {@code Field} object.
*/
public Class getDeclaringClass() {
// Android-changed: Adjust code for different field names.
return declaringClass;
}
/**
* Returns the name of the field represented by this {@code Field} object.
*/
public String getName() {
// Android-changed: getName() implemented differently.
if (declaringClass.isProxy()) {
// Proxy classes have 1 synthesized static field with no valid dex index.
if ((getModifiers() & Modifier.STATIC) == 0) {
throw new AssertionError("Invalid modifiers for proxy field: " + getModifiers());
}
// Only 2 fields are present on proxy classes.
switch (artFieldIndex) {
case 0: return "interfaces";
case 1: return "throws";
default: throw new AssertionError("Invalid index for proxy: " + artFieldIndex);
}
}
return getNameInternal();
}
// Android-added: getName() implemented differently.
@FastNative
private native String getNameInternal();
/**
* Returns the Java language modifiers for the field represented
* by this {@code Field} object, as an integer. The {@code Modifier} class should
* be used to decode the modifiers.
*
* @see Modifier
*/
public int getModifiers() {
// Android-changed: Adjust getModifiers() implementation to mask extra bits used on Android.
return accessFlags & 0xffff; // mask out bits not used by Java
}
/**
* Returns {@code true} if this field represents an element of
* an enumerated type; returns {@code false} otherwise.
*
* @return {@code true} if and only if this field represents an element of
* an enumerated type.
* @since 1.5
*/
public boolean isEnumConstant() {
return (getModifiers() & Modifier.ENUM) != 0;
}
/**
* Returns {@code true} if this field is a synthetic
* field; returns {@code false} otherwise.
*
* @return true if and only if this field is a synthetic
* field as defined by the Java Language Specification.
* @since 1.5
*/
public boolean isSynthetic() {
return Modifier.isSynthetic(getModifiers());
}
/**
* Returns a {@code Class} object that identifies the
* declared type for the field represented by this
* {@code Field} object.
*
* @return a {@code Class} object identifying the declared
* type of the field represented by this object
*/
public Class getType() {
return type;
}
/**
* Returns a {@code Type} object that represents the declared type for
* the field represented by this {@code Field} object.
*
*
If the {@code Type} is a parameterized type, the
* {@code Type} object returned must accurately reflect the
* actual type parameters used in the source code.
*
*
If the type of the underlying field is a type variable or a
* parameterized type, it is created. Otherwise, it is resolved.
*
* @return a {@code Type} object that represents the declared type for
* the field represented by this {@code Field} object
* @throws GenericSignatureFormatError if the generic field
* signature does not conform to the format specified in
* The Java™ Virtual Machine Specification
* @throws TypeNotPresentException if the generic type
* signature of the underlying field refers to a non-existent
* type declaration
* @throws MalformedParameterizedTypeException if the generic
* signature of the underlying field refers to a parameterized type
* that cannot be instantiated for any reason
* @since 1.5
*/
public Type getGenericType() {
// Android-changed: getGenericType() implemented differently.
String signatureAttribute = getSignatureAttribute();
ClassLoader cl = declaringClass.getClassLoader();
GenericSignatureParser parser = new GenericSignatureParser(cl);
parser.parseForField(declaringClass, signatureAttribute);
Type genericType = parser.fieldType;
if (genericType == null) {
genericType = getType();
}
return genericType;
}
// BEGIN Android-added: getGenericType() implemented differently.
private String getSignatureAttribute() {
String[] annotation = getSignatureAnnotation();
if (annotation == null) {
return null;
}
StringBuilder result = new StringBuilder();
for (String s : annotation) {
result.append(s);
}
return result.toString();
}
@FastNative
private native String[] getSignatureAnnotation();
// END Android-added: getGenericType() implemented differently.
/**
* Compares this {@code Field} against the specified object. Returns
* true if the objects are the same. Two {@code Field} objects are the same if
* they were declared by the same class and have the same name
* and type.
*/
public boolean equals(Object obj) {
if (obj != null && obj instanceof Field) {
Field other = (Field)obj;
return (getDeclaringClass() == other.getDeclaringClass())
&& (getName() == other.getName())
&& (getType() == other.getType());
}
return false;
}
/**
* Returns a hashcode for this {@code Field}. This is computed as the
* exclusive-or of the hashcodes for the underlying field's
* declaring class name and its name.
*/
public int hashCode() {
return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
}
/**
* Returns a string describing this {@code Field}. The format is
* the access modifiers for the field, if any, followed
* by the field type, followed by a space, followed by
* the fully-qualified name of the class declaring the field,
* followed by a period, followed by the name of the field.
* For example:
*
* public static final int java.lang.Thread.MIN_PRIORITY
* private int java.io.FileDescriptor.fd
*
*
* The modifiers are placed in canonical order as specified by
* "The Java Language Specification". This is {@code public},
* {@code protected} or {@code private} first, and then other
* modifiers in the following order: {@code static}, {@code final},
* {@code transient}, {@code volatile}.
*
* @return a string describing this {@code Field}
* @jls 8.3.1 Field Modifiers
*/
public String toString() {
int mod = getModifiers();
return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
+ getType().getTypeName() + " "
+ getDeclaringClass().getTypeName() + "."
+ getName());
}
/**
* Returns a string describing this {@code Field}, including
* its generic type. The format is the access modifiers for the
* field, if any, followed by the generic field type, followed by
* a space, followed by the fully-qualified name of the class
* declaring the field, followed by a period, followed by the name
* of the field.
*
*
The modifiers are placed in canonical order as specified by
* "The Java Language Specification". This is {@code public},
* {@code protected} or {@code private} first, and then other
* modifiers in the following order: {@code static}, {@code final},
* {@code transient}, {@code volatile}.
*
* @return a string describing this {@code Field}, including
* its generic type
*
* @since 1.5
* @jls 8.3.1 Field Modifiers
*/
public String toGenericString() {
int mod = getModifiers();
Type fieldType = getGenericType();
return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
+ fieldType.getTypeName() + " "
+ getDeclaringClass().getTypeName() + "."
+ getName());
}
/**
* Returns the value of the field represented by this {@code Field}, on
* the specified object. The value is automatically wrapped in an
* object if it has a primitive type.
*
*
The underlying field's value is obtained as follows:
*
*
If the underlying field is a static field, the {@code obj} argument
* is ignored; it may be null.
*
*
Otherwise, the underlying field is an instance field. If the
* specified {@code obj} argument is null, the method throws a
* {@code NullPointerException}. If the specified object is not an
* instance of the class or interface declaring the underlying
* field, the method throws an {@code IllegalArgumentException}.
*
*
If this {@code Field} object is enforcing Java language access control, and
* the underlying field is inaccessible, the method throws an
* {@code IllegalAccessException}.
* If the underlying field is static, the class that declared the
* field is initialized if it has not already been initialized.
*
*
Otherwise, the value is retrieved from the underlying instance
* or static field. If the field has a primitive type, the value
* is wrapped in an object before being returned, otherwise it is
* returned as is.
*
*
If the field is hidden in the type of {@code obj},
* the field's value is obtained according to the preceding rules.
*
* @param obj object from which the represented field's value is
* to be extracted
* @return the value of the represented field in object
* {@code obj}; primitive values are wrapped in an appropriate
* object before being returned
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof).
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native Object get(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance {@code boolean} field.
*
* @param obj the object to extract the {@code boolean} value
* from
* @return the value of the {@code boolean} field
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code boolean} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native boolean getBoolean(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance {@code byte} field.
*
* @param obj the object to extract the {@code byte} value
* from
* @return the value of the {@code byte} field
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code byte} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native byte getByte(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance field of type
* {@code char} or of another primitive type convertible to
* type {@code char} via a widening conversion.
*
* @param obj the object to extract the {@code char} value
* from
* @return the value of the field converted to type {@code char}
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code char} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native char getChar(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance field of type
* {@code short} or of another primitive type convertible to
* type {@code short} via a widening conversion.
*
* @param obj the object to extract the {@code short} value
* from
* @return the value of the field converted to type {@code short}
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code short} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native short getShort(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance field of type
* {@code int} or of another primitive type convertible to
* type {@code int} via a widening conversion.
*
* @param obj the object to extract the {@code int} value
* from
* @return the value of the field converted to type {@code int}
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code int} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native int getInt(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance field of type
* {@code long} or of another primitive type convertible to
* type {@code long} via a widening conversion.
*
* @param obj the object to extract the {@code long} value
* from
* @return the value of the field converted to type {@code long}
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code long} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native long getLong(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance field of type
* {@code float} or of another primitive type convertible to
* type {@code float} via a widening conversion.
*
* @param obj the object to extract the {@code float} value
* from
* @return the value of the field converted to type {@code float}
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code float} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native float getFloat(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Gets the value of a static or instance field of type
* {@code double} or of another primitive type convertible to
* type {@code double} via a widening conversion.
*
* @param obj the object to extract the {@code double} value
* from
* @return the value of the field converted to type {@code double}
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is inaccessible.
* @exception IllegalArgumentException if the specified object is not
* an instance of the class or interface declaring the
* underlying field (or a subclass or implementor
* thereof), or if the field value cannot be
* converted to the type {@code double} by a
* widening conversion.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#get
*/
@CallerSensitive
// Android-changed: get*(Object) implemented natively.
@FastNative
public native double getDouble(Object obj)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the field represented by this {@code Field} object on the
* specified object argument to the specified new value. The new
* value is automatically unwrapped if the underlying field has a
* primitive type.
*
*
The operation proceeds as follows:
*
*
If the underlying field is static, the {@code obj} argument is
* ignored; it may be null.
*
*
Otherwise the underlying field is an instance field. If the
* specified object argument is null, the method throws a
* {@code NullPointerException}. If the specified object argument is not
* an instance of the class or interface declaring the underlying
* field, the method throws an {@code IllegalArgumentException}.
*
*
If this {@code Field} object is enforcing Java language access control, and
* the underlying field is inaccessible, the method throws an
* {@code IllegalAccessException}.
*
*
If the underlying field is final, the method throws an
* {@code IllegalAccessException} unless {@code setAccessible(true)}
* has succeeded for this {@code Field} object
* and the field is non-static. Setting a final field in this way
* is meaningful only during deserialization or reconstruction of
* instances of classes with blank final fields, before they are
* made available for access by other parts of a program. Use in
* any other context may have unpredictable effects, including cases
* in which other parts of a program continue to use the original
* value of this field.
*
*
If the underlying field is of a primitive type, an unwrapping
* conversion is attempted to convert the new value to a value of
* a primitive type. If this attempt fails, the method throws an
* {@code IllegalArgumentException}.
*
*
If, after possible unwrapping, the new value cannot be
* converted to the type of the underlying field by an identity or
* widening conversion, the method throws an
* {@code IllegalArgumentException}.
*
*
If the underlying field is static, the class that declared the
* field is initialized if it has not already been initialized.
*
*
The field is set to the possibly unwrapped and widened new value.
*
*
If the field is hidden in the type of {@code obj},
* the field's value is set according to the preceding rules.
*
* @param obj the object whose field should be modified
* @param value the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void set(Object obj, Object value)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code boolean} on the specified object.
* This method is equivalent to
* {@code set(obj, zObj)},
* where {@code zObj} is a {@code Boolean} object and
* {@code zObj.booleanValue() == z}.
*
* @param obj the object whose field should be modified
* @param z the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setBoolean(Object obj, boolean z)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code byte} on the specified object.
* This method is equivalent to
* {@code set(obj, bObj)},
* where {@code bObj} is a {@code Byte} object and
* {@code bObj.byteValue() == b}.
*
* @param obj the object whose field should be modified
* @param b the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setByte(Object obj, byte b)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code char} on the specified object.
* This method is equivalent to
* {@code set(obj, cObj)},
* where {@code cObj} is a {@code Character} object and
* {@code cObj.charValue() == c}.
*
* @param obj the object whose field should be modified
* @param c the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setChar(Object obj, char c)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code short} on the specified object.
* This method is equivalent to
* {@code set(obj, sObj)},
* where {@code sObj} is a {@code Short} object and
* {@code sObj.shortValue() == s}.
*
* @param obj the object whose field should be modified
* @param s the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setShort(Object obj, short s)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as an {@code int} on the specified object.
* This method is equivalent to
* {@code set(obj, iObj)},
* where {@code iObj} is a {@code Integer} object and
* {@code iObj.intValue() == i}.
*
* @param obj the object whose field should be modified
* @param i the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setInt(Object obj, int i)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code long} on the specified object.
* This method is equivalent to
* {@code set(obj, lObj)},
* where {@code lObj} is a {@code Long} object and
* {@code lObj.longValue() == l}.
*
* @param obj the object whose field should be modified
* @param l the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setLong(Object obj, long l)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code float} on the specified object.
* This method is equivalent to
* {@code set(obj, fObj)},
* where {@code fObj} is a {@code Float} object and
* {@code fObj.floatValue() == f}.
*
* @param obj the object whose field should be modified
* @param f the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setFloat(Object obj, float f)
throws IllegalArgumentException, IllegalAccessException;
/**
* Sets the value of a field as a {@code double} on the specified object.
* This method is equivalent to
* {@code set(obj, dObj)},
* where {@code dObj} is a {@code Double} object and
* {@code dObj.doubleValue() == d}.
*
* @param obj the object whose field should be modified
* @param d the new value for the field of {@code obj}
* being modified
*
* @exception IllegalAccessException if this {@code Field} object
* is enforcing Java language access control and the underlying
* field is either inaccessible or final.
* @exception IllegalArgumentException if the specified object is not an
* instance of the class or interface declaring the underlying
* field (or a subclass or implementor thereof),
* or if an unwrapping conversion fails.
* @exception NullPointerException if the specified object is null
* and the field is an instance field.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
* @see Field#set
*/
@CallerSensitive
// Android-changed: set*(Object, ...) implemented natively.
@FastNative
public native void setDouble(Object obj, double d)
throws IllegalArgumentException, IllegalAccessException;
/**
* @throws NullPointerException {@inheritDoc}
* @since 1.5
*/
public T getAnnotation(Class annotationClass) {
Objects.requireNonNull(annotationClass);
// Android-changed: getAnnotation(Class) implemented differently.
return getAnnotationNative(annotationClass);
}
// Android-added: getAnnotation(Class) implemented differently.
@FastNative
private native A getAnnotationNative(Class annotationType);
/**
* {@inheritDoc}
* @throws NullPointerException {@inheritDoc}
* @since 1.8
*/
@Override
public T[] getAnnotationsByType(Class annotationClass) {
// Android-added: getAnnotationsByType(Class) implemented differently.
return AnnotatedElements.getDirectOrIndirectAnnotationsByType(this, annotationClass);
}
// BEGIN Android-added: isAnnotationPresent(Class) overridden in Field.
@Override
public boolean isAnnotationPresent(Class annotationType) {
if (annotationType == null) {
throw new NullPointerException("annotationType == null");
}
return isAnnotationPresentNative(annotationType);
}
@FastNative
private native boolean isAnnotationPresentNative(Class annotationType);
// END Android-added: isAnnotationPresent(Class) overridden in Field.
/**
* {@inheritDoc}
*/
@Override
@FastNative
public native Annotation[] getDeclaredAnnotations();
// BEGIN Android-added: Methods for use by Android-specific code.
/**
* Returns the offset of the field within an instance, or for static fields, the class.
*
* @hide
*/
public int getOffset() {
return offset;
}
/**
* @hide - export for use by {@code java.lang.invoke.*}
*/
@FastNative
public native long getArtField();
// END Android-added: Methods for use by Android-specific code.
}