org.exolab.castor.xml.handlers
Class EnumFieldHandler

java.lang.Object
  org.exolab.castor.xml.handlers.EnumFieldHandler

All Implemented Interfaces:

FieldHandler

public class EnumFieldHandler
extends Object
implements FieldHandler

A specialized FieldHandler for the XML Schema enumeration types.

Version:

$Revision: 7168 $ $Date: 2006-04-13 06:47:36 -0600 (Thu, 13 Apr 2006) $

Author:

Keith Visco

Constructor Summary

EnumFieldHandler(Class enumType, FieldHandler handler)
Creates a new EnumFieldHandler with the given type and FieldHandler.

Method Summary

void	checkValidity(Object object) Checks the field validity.
boolean	equals(Object obj) Returns true if the given object is an XMLFieldHandler that is equivalent to the delegated handler.
Object	getValue(Object target) Returns the value of the field associated with this descriptor from the given target object.
Object	newInstance(Object parent) Creates a new instance of the object described by this field.
void	resetValue(Object target) Sets the value of the field to a default value -- for enum, no action needed.
void	setValue(Object target, Object value) Sets the value of the field associated with this descriptor.

Methods inherited from class java.lang.Object

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

Constructor Detail

EnumFieldHandler

public EnumFieldHandler(Class enumType,
                        FieldHandler handler)

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

getValue

public Object getValue(Object target)
                throws IllegalStateException

Returns the value of the field associated with this descriptor from the given target object.

Specified by:

getValue in interface FieldHandler

Parameters:

target - the object to get the value from

Returns:

the value of the field associated with this descriptor from the given target object.

Throws:

IllegalStateException - The Java object has changed and is no longer supported by this handler, or the handler is not compatible with the Java object

setValue

public void setValue(Object target,
                     Object value)
              throws IllegalStateException

Sets the value of the field associated with this descriptor.

Specified by:

setValue in interface FieldHandler

Parameters:

target - the object in which to set the value

value - the value of the field

Throws:

IllegalStateException - The Java object has changed and is no longer supported by this handler, or the handler is not compatible with the Java object.

resetValue

public void resetValue(Object target)

Sets the value of the field to a default value -- for enum, no action needed.

Specified by:

resetValue in interface FieldHandler

Parameters:

target - The object.

checkValidity

public void checkValidity(Object object)
                   throws ValidityException,
                          IllegalStateException

Checks the field validity. Returns successfully if the field can be stored, is valid, etc, throws an exception otherwise.

Specified by:

checkValidity in interface FieldHandler

Parameters:

object - The object

Throws:

ValidityException - The field is invalid, is required and null, or any other validity violation

IllegalStateException - The Java object has changed and is no longer supported by this handler, or the handler is not compatiable with the Java object

newInstance

public Object newInstance(Object parent)
                   throws IllegalStateException

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

Specified by:

newInstance in interface FieldHandler

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

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.