FieldInstance (JBoss/Common API) - JBoss 4.0.1 sp1 common API Documentation 英文版文档

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org.jboss.util
Class FieldInstance

java.lang.Object
  org.jboss.util.FieldInstance

public class FieldInstance
extends Object

A FieldInstance refers to a specific reflected field on an object.

Version:: $Revision: 1.1 $
Author:: Jason Dillon

Field Summary

protected Field field
          Field

protected Object instance
          Instance

Constructor Summary

FieldInstance(Object instance, String fieldName)
          Construct a new field instance.

Method Summary

Object get()
          Get the value of the field instance.

Field getField()
          Get the field.

Object getInstance()
          Get the instance.

void set(Object value)
          Set the value of the field instance

Methods inherited from class java.lang.Object

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

Field Detail

field

protected final Field field

Field

instance

protected final Object instance

Instance

Constructor Detail

FieldInstance

public FieldInstance(Object instance,
                     String fieldName)
              throws NoSuchFieldException

Construct a new field instance.
Parameters:: instance - The instance object the given field belongs to.; fieldName - The name of the field to find in the instance.
Throws:: NullArgumentException - Instance or fieldName is null.; NoSuchFieldException

Method Detail

getField

public final Field getField()

Get the field.

Returns:: Field.

getInstance

public final Object getInstance()

Get the instance.

Returns:: Instance.

get

public final Object get()
                 throws IllegalAccessException

Get the value of the field instance.

Returns:: Field value.
Throws:: IllegalAccessException - Failed to get field value.

set

public final void set(Object value)
               throws IllegalAccessException

Set the value of the field instance

Parameters:: value - Field value.
Throws:: IllegalAccessException - Failed to set field value.