org.exolab.castor.mapping.handlers

Class EnumFieldHandler

java.lang.Object

org.exolab.castor.mapping.loader.FieldHandlerFriend<T>

org.exolab.castor.mapping.ExtendedFieldHandler<T>

org.exolab.castor.mapping.AbstractFieldHandler

org.exolab.castor.mapping.GeneralizedFieldHandler

org.exolab.castor.mapping.handlers.EnumFieldHandler

All Implemented Interfaces:

ConfigurableFieldHandler, FieldHandler

public class EnumFieldHandler
extends GeneralizedFieldHandler

A specialized FieldHandler for the type-safe enum style classes. Adapted from org.exolab.castor.xml.handlers.EnumFieldHandler which is used for the generated source code.

Version:

$Revision$ $Date: 2006-04-13 06:47:36 -0600 (Thu, 13 Apr 2006) $

Author:

Keith Visco

Field Summary

Fields inherited from class org.exolab.castor.mapping.AbstractFieldHandler

_properties

Constructor Summary

Constructors

Constructor and Description
EnumFieldHandler(Class enumType, FieldHandler handler, Method createMethod) Creates a new EnumFieldHandler with the given type and FieldHandler

Method Summary

Modifier and Type	Method and Description
Object	convertUponGet(Object value) This method is used to convert the value when the getValue method is called.
Object	convertUponSet(Object value) This method is used to convert the value when the setValue method is called.
boolean	equals(Object obj) Returns true if the given object is an XMLFieldHandler that is equivalent to the delegated handler.
Class	getFieldType() Returns the class type for the field that this GeneralizedFieldHandler converts to and from.
Object	newInstance(Object parent) Creates a new instance of the object described by this field.
Object	newInstance(Object parent, Object[] args) Creates a new instance of the object described by this field.

Methods inherited from class org.exolab.castor.mapping.GeneralizedFieldHandler

getValue, resetValue, setCollectionIteration, setFieldHandler, setValue

Methods inherited from class org.exolab.castor.mapping.AbstractFieldHandler

getFieldDescriptor, hasValue, setConfiguration, setFieldDescriptor

Methods inherited from class org.exolab.castor.mapping.ExtendedFieldHandler

checkValidity

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.exolab.castor.mapping.FieldHandler

checkValidity

Constructor Detail

EnumFieldHandler

public EnumFieldHandler(Class enumType,
                        FieldHandler handler,
                        Method createMethod)

Creates a new EnumFieldHandler with the given type and FieldHandler

Parameters:

enumType - the Class type of the described field

handler - the FieldHandler to delegate to

Method Detail

convertUponGet

public Object convertUponGet(Object value)

Description copied from class: GeneralizedFieldHandler

This method is used to convert the value when the getValue method is called. The getValue method will obtain the actual field value from given 'parent' object. This convert method is then invoked with the field's value. The value returned from this method will be the actual value returned by getValue method.

Specified by:

convertUponGet in class GeneralizedFieldHandler

Parameters:

value - the object value to convert after performing a get operation

Returns:

the converted value.

See Also:

GeneralizedFieldHandler.convertUponGet(java.lang.Object)

convertUponSet

public Object convertUponSet(Object value)
                      throws IllegalStateException

Description copied from class: GeneralizedFieldHandler

This method is used to convert the value when the setValue method is called. The setValue method will call this method to obtain the converted value. The converted value will then be used as the value to set for the field.

Specified by:

convertUponSet in class GeneralizedFieldHandler

Parameters:

value - the object value to convert before performing a set operation

Returns:

the converted value.

Throws:

IllegalStateException

See Also:

GeneralizedFieldHandler.convertUponSet(java.lang.Object)

getFieldType

public Class getFieldType()

Description copied from class: GeneralizedFieldHandler

Returns the class type for the field that this GeneralizedFieldHandler converts to and from. This should be the type that is used in the object model.

Specified by:

getFieldType in class GeneralizedFieldHandler

Returns:

the class type of of the field

See Also:

GeneralizedFieldHandler.getFieldType()

newInstance

public Object newInstance(Object parent)
                   throws IllegalStateException

Description copied from class: GeneralizedFieldHandler

Creates a new instance of the object described by this field.

Specified by:

newInstance in interface FieldHandler

Overrides:

newInstance in class GeneralizedFieldHandler

Parameters:

parent - The object for which the field is created

Returns:

A new instance of the field's value

Throws:

IllegalStateException - This field is a simple type and cannot be instantiated

See Also:

FieldHandler.newInstance(java.lang.Object)

newInstance

public Object newInstance(Object parent,
                          Object[] args)
                   throws IllegalStateException

Description copied from class: GeneralizedFieldHandler

Creates a new instance of the object described by this field.

Overrides:

newInstance in class GeneralizedFieldHandler

Parameters:

parent - The object for which the field is created

args - the set of constructor arguments

Returns:

A new instance of the field's value

Throws:

IllegalStateException - This field is a simple type and cannot be instantiated

See Also:

ExtendedFieldHandler.newInstance(java.lang.Object, java.lang.Object[])

equals

public boolean equals(Object obj)

Returns true if the given object is an XMLFieldHandler that is equivalent to the delegated handler. An equivalent XMLFieldHandler is an XMLFieldHandler that is an instances of the same class.

Overrides:

equals in class Object

Returns:

true if the given object is an XMLFieldHandler that is equivalent to this one.