r01f.reflection.fluent
Class FieldInvoker<T>

java.lang.Object
  r01f.reflection.fluent.FieldInvoker<T>

Type Parameters:

T - the declared type for the field to access. Usage example:

   // Retrieves the value of the field "name"
   String name = Reflection.field("name").ofType(String.class).in(person).get();
 
   // Sets the value of the field "name" to "Yoda"
   Reflection.field("name").ofType(String.class).in(person).set("Yoda");
 
   // Retrieves the value of the static field "count"
   int count = Reflection.staticField("count").ofType(int.class).in(Person.class).get();
 
   // Sets the value of the static field "count" to 3
   Reflection.staticField("count").ofType(int.class).in(Person.class).set(3);
 

public final class FieldInvoker<T>
extends java.lang.Object

Object's field access using reflection

Field Summary

private boolean	_accessible
private java.lang.reflect.Field	_field
private java.lang.Object	_targetObj

Constructor Summary

private

FieldInvoker(java.lang.Object target, java.lang.reflect.Field field)

Method Summary

private static <T> FieldInvoker<T>	_createInvoker(java.lang.String fieldName, java.lang.Class<?> expectedType, java.lang.Object target)
private static java.lang.reflect.Field	_field(java.lang.String fieldName, java.lang.Class<?> declaringType)
private static ReflectionException	_incorrectFieldType(java.lang.reflect.Field field, java.lang.Class<?> actual, java.lang.Class<?> expected)
private static java.lang.reflect.Field	_lookupInClassHierarchy(java.lang.String fieldName, java.lang.Class<?> declaringType)
private static void	_makeAccessible(java.lang.reflect.Field field)
private static java.lang.Class<?>	_typeOf(java.lang.Object target)
private static void	_verifyCorrectType(java.lang.reflect.Field field, java.lang.Class<?> expectedType)
T	get() Returns the value of the field managed by this class.
java.lang.reflect.Field	getField() Returns the "real" field managed by this class.
(package private) static <T> FieldInvoker<T>	newInvoker(java.lang.String fieldName, java.lang.Class<T> expectedType, java.lang.Object target)
(package private) static <T> FieldInvoker<T>	newInvoker(java.lang.String fieldName, TypeRef<T> expectedType, java.lang.Object target)
void	set(T value) Sets a value in the field managed by this class.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_targetObj

private final java.lang.Object _targetObj

_field

private final java.lang.reflect.Field _field

_accessible

private final boolean _accessible

Constructor Detail

FieldInvoker

private FieldInvoker(java.lang.Object target,
                     java.lang.reflect.Field field)

Method Detail

newInvoker

static <T> FieldInvoker<T> newInvoker(java.lang.String fieldName,
                                      java.lang.Class<T> expectedType,
                                      java.lang.Object target)

newInvoker

static <T> FieldInvoker<T> newInvoker(java.lang.String fieldName,
                                      TypeRef<T> expectedType,
                                      java.lang.Object target)

set

public void set(T value)

Sets a value in the field managed by this class.

Parameters:

value - the value to set.

Throws:

ReflectionError - if the given value cannot be set.

get

public T get()

Returns the value of the field managed by this class.

Returns:

the value of the field managed by this class.

Throws:

ReflectionError - if the value of the field cannot be retrieved.

getField

public java.lang.reflect.Field getField()

Returns the "real" field managed by this class.

Returns:

the "real" field managed by this class.

_createInvoker

private static <T> FieldInvoker<T> _createInvoker(java.lang.String fieldName,
                                                  java.lang.Class<?> expectedType,
                                                  java.lang.Object target)

_typeOf

private static java.lang.Class<?> _typeOf(java.lang.Object target)

_lookupInClassHierarchy

private static java.lang.reflect.Field _lookupInClassHierarchy(java.lang.String fieldName,
                                                               java.lang.Class<?> declaringType)

_makeAccessible

private static void _makeAccessible(java.lang.reflect.Field field)

_verifyCorrectType

private static void _verifyCorrectType(java.lang.reflect.Field field,
                                       java.lang.Class<?> expectedType)

_field

private static java.lang.reflect.Field _field(java.lang.String fieldName,
                                              java.lang.Class<?> declaringType)

_incorrectFieldType

private static ReflectionException _incorrectFieldType(java.lang.reflect.Field field,
                                                       java.lang.Class<?> actual,
                                                       java.lang.Class<?> expected)