org.exolab.castor.xml.handlers

Class CollectionFieldHandler

java.lang.Object

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

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

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

org.exolab.castor.xml.XMLFieldHandler

org.exolab.castor.xml.handlers.CollectionFieldHandler

All Implemented Interfaces:

ConfigurableFieldHandler, FieldHandler

public class CollectionFieldHandler
extends XMLFieldHandler

A FieldHandler for the XML Schema Collection type.

TODO : support all kind of XSList.

Version:

$Revision$ $Date: 2003-03-03 00:05:44 -0700 (Mon, 03 Mar 2003) $

Author:

Arnaud Blandin

Field Summary

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

_properties

Constructor Summary

Constructors

Constructor and Description
CollectionFieldHandler(FieldHandler fieldHandler) Creates a new CollectionFieldHandler using the given FieldHandler for delegation.
CollectionFieldHandler(FieldHandler fieldHandler, TypeValidator validator) Creates a new CollectionFieldHandler using the given FieldHandler for delegation and the given type validator for validation.

Method Summary

Modifier and Type	Method and Description
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) Gets the value of the field associated with this descriptor.
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.
void	setValue(Object target, Object value) Sets the value of the field associated with this descriptor.

Methods inherited from class org.exolab.castor.xml.XMLFieldHandler

newInstance

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

getFieldDescriptor, hasValue, setConfiguration, setFieldDescriptor

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionFieldHandler

public CollectionFieldHandler(FieldHandler fieldHandler)

Creates a new CollectionFieldHandler using the given FieldHandler for delegation.

Parameters:

fieldHandler - the fieldHandler for delegation.

CollectionFieldHandler

public CollectionFieldHandler(FieldHandler fieldHandler,
                              TypeValidator validator)

Creates a new CollectionFieldHandler using the given FieldHandler for delegation and the given type validator for validation.

Parameters:

fieldHandler - the fieldHandler for delegation.

validator - Type validator to use to validate an instance of this type.

Method Detail

setValue

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

Sets the value of the field associated with this descriptor. If paased a String, then String is tokenized and each token is added as an individual instance to the collection.

Specified by:

setValue in interface FieldHandler

Overrides:

setValue in class XMLFieldHandler

Parameters:

target - the object in which to set the value

value - the value of the field

Throws:

IllegalStateException - if any value provided fails validation.

getValue

public Object getValue(Object target)
                throws IllegalStateException

Gets the value of the field associated with this descriptor. If the value is an array, it returns a string 'representing' this array

Specified by:

getValue in interface FieldHandler

Overrides:

getValue in class XMLFieldHandler

Parameters:

target - the object from which to get the value

Returns:

the value of the field associated with this descriptor.

Throws:

IllegalStateException - if any value provided fails validation.

resetValue

public void resetValue(Object target)
                throws IllegalStateException

Sets the value of the field to a default value.

Specified by:

resetValue in interface FieldHandler

Overrides:

resetValue in class XMLFieldHandler

Parameters:

target - The object to reset

Throws:

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

Overrides:

checkValidity in class ExtendedFieldHandler

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

Overrides:

newInstance in class XMLFieldHandler

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 XMLFieldHandler

Parameters:

obj - The object to compare to this.

Returns:

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