ariba.util.fieldvalue
Class ClassExtensionSetter

java.lang.Object
  ariba.util.fieldvalue.BaseAccessor
      ariba.util.fieldvalue.ReflectionMethodAccessor
          ariba.util.fieldvalue.ReflectionMethodSetter
              ariba.util.fieldvalue.ClassExtensionSetter

All Implemented Interfaces:

FieldValueAccessor, FieldValueSetter

public class ClassExtensionSetter
extends ReflectionMethodSetter

A special FieldValueAccessor subclass which supports the use of the FieldValue subsystem to invoke ClassExtension methods. The main difference between a ClassExtension method and a normal method (implemented on the targetClass proper) is that the first argument of a ClassExtension method is always the targetObject. The ClassExtensionSetter handles this case by invoking the ClassExtension methods with the ClassExtension as the target of the invocation and by passing the actual targte as the first argument in the args array.

Method Summary

static FieldValueSetter

newInstance(java.lang.Class targetClass, java.lang.String fieldName) Allocate and initialize a new ClassExtensionSetter for the named ClassExtension, the class of the target object, and the name of the field.

Methods inherited from class ariba.util.fieldvalue.ReflectionMethodSetter

setValue

Methods inherited from class ariba.util.fieldvalue.ReflectionMethodAccessor

toString

Methods inherited from class ariba.util.fieldvalue.BaseAccessor

forClass, getFieldName, isApplicable

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface ariba.util.fieldvalue.FieldValueAccessor

forClass, getFieldName, isApplicable

Method Detail

newInstance

public static FieldValueSetter newInstance(java.lang.Class targetClass,
                                           java.lang.String fieldName)

Allocate and initialize a new ClassExtensionSetter for the named ClassExtension, the class of the target object, and the name of the field. This first attempes to locate the appropriate class extension for the given name and target class. If it cannot be found, throws a FieldValueException with an informative message. Otherwise, this will lookup the appropriate setter method for the classExtension and fieldName.

Parameters:

targetClass - the class of the target object

fieldName - the name of the field for which the accessor applies

Returns:

a newly constructed ClassExtensionSetter for setting values