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* 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
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*
* 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
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* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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*
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package java.lang.reflect;
import jdk.internal.access.SharedSecrets;
import jdk.internal.reflect.CallerSensitive;
import jdk.internal.reflect.FieldAccessor;
import jdk.internal.reflect.Reflection;
import jdk.internal.vm.annotation.ForceInline;
import sun.reflect.generics.repository.FieldRepository;
import sun.reflect.generics.factory.CoreReflectionFactory;
import sun.reflect.generics.factory.GenericsFactory;
import sun.reflect.generics.scope.ClassScope;
import java.lang.annotation.Annotation;
import java.util.Map;
import java.util.Objects;
import sun.reflect.annotation.AnnotationParser;
import sun.reflect.annotation.AnnotationSupport;
import sun.reflect.annotation.TypeAnnotation;
import sun.reflect.annotation.TypeAnnotationParser;
A 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 Field
permits widening conversions to occur during a get or set access operation, but throws an IllegalArgumentException
if a narrowing conversion would occur.
Author: Kenneth Russell, Nakul Saraiya See Also: Since: 1.1
/**
* 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.
*
* <p>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
* @since 1.1
*/
public final
class Field extends AccessibleObject implements Member {
private Class<?> clazz;
private int slot;
// This is guaranteed to be interned by the VM in the 1.4
// reflection implementation
private String name;
private Class<?> type;
private int modifiers;
// Generics and annotations support
private transient String signature;
// generic info repository; lazily initialized
private transient FieldRepository genericInfo;
private byte[] annotations;
// Cached field accessor created without override
private FieldAccessor fieldAccessor;
// Cached field accessor created with override
private FieldAccessor overrideFieldAccessor;
// For sharing of FieldAccessors. This branching structure is
// currently only two levels deep (i.e., one root Field and
// potentially many Field objects pointing to it.)
//
// If this branching structure would ever contain cycles, deadlocks can
// occur in annotation code.
private Field root;
// Generics infrastructure
private String getGenericSignature() {return signature;}
// Accessor for factory
private GenericsFactory getFactory() {
Class<?> c = getDeclaringClass();
// create scope and factory
return CoreReflectionFactory.make(c, ClassScope.make(c));
}
// Accessor for generic info repository
private FieldRepository getGenericInfo() {
// lazily initialize repository if necessary
if (genericInfo == null) {
// create and cache generic info repository
genericInfo = FieldRepository.make(getGenericSignature(),
getFactory());
}
return genericInfo; //return cached repository
}
Package-private constructor used by ReflectAccess to enable
instantiation of these objects in Java code from the java.lang
package via sun.reflect.LangReflectAccess.
/**
* Package-private constructor used by ReflectAccess to enable
* instantiation of these objects in Java code from the java.lang
* package via sun.reflect.LangReflectAccess.
*/
Field(Class<?> declaringClass,
String name,
Class<?> type,
int modifiers,
int slot,
String signature,
byte[] annotations)
{
this.clazz = declaringClass;
this.name = name;
this.type = type;
this.modifiers = modifiers;
this.slot = slot;
this.signature = signature;
this.annotations = annotations;
}
Package-private routine (exposed to java.lang.Class via
ReflectAccess) which returns a copy of this Field. The copy's
"root" field points to this Field.
/**
* Package-private routine (exposed to java.lang.Class via
* ReflectAccess) which returns a copy of this Field. The copy's
* "root" field points to this Field.
*/
Field copy() {
// This routine enables sharing of FieldAccessor objects
// among Field objects which refer to the same underlying
// method in the VM. (All of this contortion is only necessary
// because of the "accessibility" bit in AccessibleObject,
// which implicitly requires that new java.lang.reflect
// objects be fabricated for each reflective call on Class
// objects.)
if (this.root != null)
throw new IllegalArgumentException("Can not copy a non-root Field");
Field res = new Field(clazz, name, type, modifiers, slot, signature, annotations);
res.root = this;
// Might as well eagerly propagate this if already present
res.fieldAccessor = fieldAccessor;
res.overrideFieldAccessor = overrideFieldAccessor;
return res;
}
Throws: - InaccessibleObjectException – {@inheritDoc}
- SecurityException – {@inheritDoc}
/**
* @throws InaccessibleObjectException {@inheritDoc}
* @throws SecurityException {@inheritDoc}
*/
@Override
@CallerSensitive
public void setAccessible(boolean flag) {
AccessibleObject.checkPermission();
if (flag) checkCanSetAccessible(Reflection.getCallerClass());
setAccessible0(flag);
}
@Override
void checkCanSetAccessible(Class<?> caller) {
checkCanSetAccessible(caller, clazz);
}
Returns the Class
object representing the class or interface that declares the field represented by this Field
object. /**
* Returns the {@code Class} object representing the class or interface
* that declares the field represented by this {@code Field} object.
*/
@Override
public Class<?> getDeclaringClass() {
return clazz;
}
Returns the name of the field represented by this Field
object. /**
* Returns the name of the field represented by this {@code Field} object.
*/
public String getName() {
return name;
}
Returns the Java language modifiers for the field represented by this Field
object, as an integer. The Modifier
class should be used to decode the modifiers. See Also:
/**
* 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() {
return modifiers;
}
Returns true
if this field represents an element of an enumerated type; returns false
otherwise. Returns: true
if and only if this field represents an element of an enumerated type.Since: 1.5
/**
* 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 true
if this field is a synthetic field; returns false
otherwise. Returns: true if and only if this field is a synthetic
field as defined by the Java Language Specification. Since: 1.5
/**
* 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 Class
object that identifies the declared type for the field represented by this Field
object. Returns: a Class
object identifying the declared type of the field represented by this object
/**
* 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 Type
object that represents the declared type for the field represented by this Field
object. If the Type
is a parameterized type, the 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.
Throws: - GenericSignatureFormatError – if the generic field
signature does not conform to the format specified in
The Java™ Virtual Machine Specification
- TypeNotPresentException – if the generic type
signature of the underlying field refers to a non-existent
type declaration
- MalformedParameterizedTypeException – if the generic
signature of the underlying field refers to a parameterized type
that cannot be instantiated for any reason
Returns: a Type
object that represents the declared type for the field represented by this Field
object Since: 1.5
/**
* Returns a {@code Type} object that represents the declared type for
* the field represented by this {@code Field} object.
*
* <p>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.
*
* <p>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
* <cite>The Java™ Virtual Machine Specification</cite>
* @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() {
if (getGenericSignature() != null)
return getGenericInfo().getGenericType();
else
return getType();
}
Compares this Field
against the specified object. Returns true if the objects are the same. Two Field
objects are the same if they were declared by the same class and have the same name and type. /**
* 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 Field
. This is computed as the exclusive-or of the hashcodes for the underlying field's declaring class name and its name. /**
* 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 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 public
, protected
or private
first, and then other modifiers in the following order: static
, final
, transient
, volatile
.
Returns: a string describing this Field
@jls 8.3.1 Field Modifiers
/**
* 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:
* <pre>
* public static final int java.lang.Thread.MIN_PRIORITY
* private int java.io.FileDescriptor.fd
* </pre>
*
* <p>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());
}
@Override
String toShortString() {
return "field " + getDeclaringClass().getTypeName() + "." + getName();
}
Returns a string describing this 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 public
, protected
or private
first, and then other modifiers in the following order: static
, final
, transient
, volatile
.
Returns: a string describing this Field
, including its generic type Since: 1.5 @jls 8.3.1 Field Modifiers
/**
* 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.
*
* <p>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 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 obj
argument is ignored; it may be null.
Otherwise, the underlying field is an instance field. If the specified obj
argument is null, the method throws a NullPointerException
. If the specified object is not an instance of the class or interface declaring the underlying field, the method throws an IllegalArgumentException
.
If this Field
object is enforcing Java language access control, and the underlying field is inaccessible, the method throws an 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 obj
, the field's value is obtained according to the preceding rules.
Params: - obj – object from which the represented field's value is
to be extracted
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - IllegalArgumentException – if the specified object is not an
instance of the class or interface declaring the underlying
field (or a subclass or implementor thereof).
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
Returns: the value of the represented field in object obj
; primitive values are wrapped in an appropriate object before being returned
/**
* 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.
*
* <p>The underlying field's value is obtained as follows:
*
* <p>If the underlying field is a static field, the {@code obj} argument
* is ignored; it may be null.
*
* <p>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}.
*
* <p>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.
*
* <p>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.
*
* <p>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
@ForceInline // to ensure Reflection.getCallerClass optimization
public Object get(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).get(obj);
}
Gets the value of a static or instance boolean
field. Params: - obj – the object to extract the
boolean
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
boolean
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the boolean
field
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public boolean getBoolean(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getBoolean(obj);
}
Gets the value of a static or instance byte
field. Params: - obj – the object to extract the
byte
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
byte
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the byte
field
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public byte getByte(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getByte(obj);
}
Gets the value of a static or instance field of type char
or of another primitive type convertible to type char
via a widening conversion. Params: - obj – the object to extract the
char
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
char
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the field converted to type char
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public char getChar(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getChar(obj);
}
Gets the value of a static or instance field of type short
or of another primitive type convertible to type short
via a widening conversion. Params: - obj – the object to extract the
short
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
short
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the field converted to type short
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public short getShort(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getShort(obj);
}
Gets the value of a static or instance field of type int
or of another primitive type convertible to type int
via a widening conversion. Params: - obj – the object to extract the
int
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
int
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the field converted to type int
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public int getInt(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getInt(obj);
}
Gets the value of a static or instance field of type long
or of another primitive type convertible to type long
via a widening conversion. Params: - obj – the object to extract the
long
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
long
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the field converted to type long
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public long getLong(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getLong(obj);
}
Gets the value of a static or instance field of type float
or of another primitive type convertible to type float
via a widening conversion. Params: - obj – the object to extract the
float
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
float
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the field converted to type float
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public float getFloat(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getFloat(obj);
}
Gets the value of a static or instance field of type double
or of another primitive type convertible to type double
via a widening conversion. Params: - obj – the object to extract the
double
value from
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is inaccessible. - 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
double
by a widening conversion. - NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also: Returns: the value of the field converted to type double
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public double getDouble(Object obj)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
return getFieldAccessor(obj).getDouble(obj);
}
Sets the field represented by this 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 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 NullPointerException
. If the specified object argument is not an instance of the class or interface declaring the underlying field, the method throws an IllegalArgumentException
.
If this Field
object is enforcing Java language access control, and the underlying field is inaccessible, the method throws an IllegalAccessException
.
If the underlying field is final, the method throws an IllegalAccessException
unless setAccessible(true)
has succeeded for this 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 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 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 obj
, the field's value is set according to the preceding rules.
Params: - obj – the object whose field should be modified
- value – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
/**
* 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.
*
* <p>The operation proceeds as follows:
*
* <p>If the underlying field is static, the {@code obj} argument is
* ignored; it may be null.
*
* <p>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}.
*
* <p>If this {@code Field} object is enforcing Java language access control, and
* the underlying field is inaccessible, the method throws an
* {@code IllegalAccessException}.
*
* <p>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.
*
* <p>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}.
*
* <p>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}.
*
* <p>If the underlying field is static, the class that declared the
* field is initialized if it has not already been initialized.
*
* <p>The field is set to the possibly unwrapped and widened new value.
*
* <p>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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void set(Object obj, Object value)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).set(obj, value);
}
Sets the value of a field as a boolean
on the specified object. This method is equivalent to set(obj, zObj)
, where zObj
is a Boolean
object and zObj.booleanValue() == z
. Params: - obj – the object whose field should be modified
- z – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setBoolean(Object obj, boolean z)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setBoolean(obj, z);
}
Sets the value of a field as a byte
on the specified object. This method is equivalent to set(obj, bObj)
, where bObj
is a Byte
object and bObj.byteValue() == b
. Params: - obj – the object whose field should be modified
- b – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setByte(Object obj, byte b)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setByte(obj, b);
}
Sets the value of a field as a char
on the specified object. This method is equivalent to set(obj, cObj)
, where cObj
is a Character
object and cObj.charValue() == c
. Params: - obj – the object whose field should be modified
- c – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setChar(Object obj, char c)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setChar(obj, c);
}
Sets the value of a field as a short
on the specified object. This method is equivalent to set(obj, sObj)
, where sObj
is a Short
object and sObj.shortValue() == s
. Params: - obj – the object whose field should be modified
- s – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setShort(Object obj, short s)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setShort(obj, s);
}
Sets the value of a field as an int
on the specified object. This method is equivalent to set(obj, iObj)
, where iObj
is an Integer
object and iObj.intValue() == i
. Params: - obj – the object whose field should be modified
- i – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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 an {@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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setInt(Object obj, int i)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setInt(obj, i);
}
Sets the value of a field as a long
on the specified object. This method is equivalent to set(obj, lObj)
, where lObj
is a Long
object and lObj.longValue() == l
. Params: - obj – the object whose field should be modified
- l – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setLong(Object obj, long l)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setLong(obj, l);
}
Sets the value of a field as a float
on the specified object. This method is equivalent to set(obj, fObj)
, where fObj
is a Float
object and fObj.floatValue() == f
. Params: - obj – the object whose field should be modified
- f – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setFloat(Object obj, float f)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setFloat(obj, f);
}
Sets the value of a field as a double
on the specified object. This method is equivalent to set(obj, dObj)
, where dObj
is a Double
object and dObj.doubleValue() == d
. Params: - obj – the object whose field should be modified
- d – the new value for the field of
obj
being modified
Throws: - IllegalAccessException – if this
Field
object is enforcing Java language access control and the underlying field is either inaccessible or final. - 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.
- NullPointerException – if the specified object is null
and the field is an instance field.
- ExceptionInInitializerError – if the initialization provoked
by this method fails.
See Also:
/**
* 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
@ForceInline // to ensure Reflection.getCallerClass optimization
public void setDouble(Object obj, double d)
throws IllegalArgumentException, IllegalAccessException
{
if (!override) {
Class<?> caller = Reflection.getCallerClass();
checkAccess(caller, obj);
}
getFieldAccessor(obj).setDouble(obj, d);
}
// check access to field
private void checkAccess(Class<?> caller, Object obj)
throws IllegalAccessException
{
checkAccess(caller, clazz,
Modifier.isStatic(modifiers) ? null : obj.getClass(),
modifiers);
}
// security check is done before calling this method
private FieldAccessor getFieldAccessor(Object obj)
throws IllegalAccessException
{
boolean ov = override;
FieldAccessor a = (ov) ? overrideFieldAccessor : fieldAccessor;
return (a != null) ? a : acquireFieldAccessor(ov);
}
// NOTE that there is no synchronization used here. It is correct
// (though not efficient) to generate more than one FieldAccessor
// for a given Field. However, avoiding synchronization will
// probably make the implementation more scalable.
private FieldAccessor acquireFieldAccessor(boolean overrideFinalCheck) {
// First check to see if one has been created yet, and take it
// if so
FieldAccessor tmp = null;
if (root != null) tmp = root.getFieldAccessor(overrideFinalCheck);
if (tmp != null) {
if (overrideFinalCheck)
overrideFieldAccessor = tmp;
else
fieldAccessor = tmp;
} else {
// Otherwise fabricate one and propagate it up to the root
tmp = reflectionFactory.newFieldAccessor(this, overrideFinalCheck);
setFieldAccessor(tmp, overrideFinalCheck);
}
return tmp;
}
// Returns FieldAccessor for this Field object, not looking up
// the chain to the root
private FieldAccessor getFieldAccessor(boolean overrideFinalCheck) {
return (overrideFinalCheck)? overrideFieldAccessor : fieldAccessor;
}
// Sets the FieldAccessor for this Field object and
// (recursively) its root
private void setFieldAccessor(FieldAccessor accessor, boolean overrideFinalCheck) {
if (overrideFinalCheck)
overrideFieldAccessor = accessor;
else
fieldAccessor = accessor;
// Propagate up
if (root != null) {
root.setFieldAccessor(accessor, overrideFinalCheck);
}
}
@Override
Field getRoot() {
return root;
}
Throws: - NullPointerException – {@inheritDoc}
Since: 1.5
/**
* @throws NullPointerException {@inheritDoc}
* @since 1.5
*/
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
Objects.requireNonNull(annotationClass);
return annotationClass.cast(declaredAnnotations().get(annotationClass));
}
{@inheritDoc}
Throws: - NullPointerException – {@inheritDoc}
Since: 1.8
/**
* {@inheritDoc}
* @throws NullPointerException {@inheritDoc}
* @since 1.8
*/
@Override
public <T extends Annotation> T[] getAnnotationsByType(Class<T> annotationClass) {
Objects.requireNonNull(annotationClass);
return AnnotationSupport.getDirectlyAndIndirectlyPresent(declaredAnnotations(), annotationClass);
}
{@inheritDoc}
/**
* {@inheritDoc}
*/
public Annotation[] getDeclaredAnnotations() {
return AnnotationParser.toArray(declaredAnnotations());
}
private transient volatile Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
private Map<Class<? extends Annotation>, Annotation> declaredAnnotations() {
Map<Class<? extends Annotation>, Annotation> declAnnos;
if ((declAnnos = declaredAnnotations) == null) {
synchronized (this) {
if ((declAnnos = declaredAnnotations) == null) {
Field root = this.root;
if (root != null) {
declAnnos = root.declaredAnnotations();
} else {
declAnnos = AnnotationParser.parseAnnotations(
annotations,
SharedSecrets.getJavaLangAccess()
.getConstantPool(getDeclaringClass()),
getDeclaringClass());
}
declaredAnnotations = declAnnos;
}
}
}
return declAnnos;
}
private native byte[] getTypeAnnotationBytes0();
Returns an AnnotatedType object that represents the use of a type to specify
the declared type of the field represented by this Field.
Returns: an object representing the declared type of the field
represented by this Field Since: 1.8
/**
* Returns an AnnotatedType object that represents the use of a type to specify
* the declared type of the field represented by this Field.
* @return an object representing the declared type of the field
* represented by this Field
*
* @since 1.8
*/
public AnnotatedType getAnnotatedType() {
return TypeAnnotationParser.buildAnnotatedType(getTypeAnnotationBytes0(),
SharedSecrets.getJavaLangAccess().
getConstantPool(getDeclaringClass()),
this,
getDeclaringClass(),
getGenericType(),
TypeAnnotation.TypeAnnotationTarget.FIELD);
}
}