org.jibx.extras
Class IdRefMapperBase

java.lang.Object
  org.jibx.extras.IdRefMapperBase

All Implemented Interfaces:

IAliasable, IMarshaller, IUnmarshaller

public abstract class IdRefMapperBase
extends java.lang.Object
implements IMarshaller, IUnmarshaller, IAliasable

Abstract base custom marshaller/unmarshaller for an object reference. This marshals the reference as an empty element with a single IDREF attribute, and unmarshals an element with the same structure to create a reference to the object with that ID value. To use this class you need to create a subclass with a constructor using the same signature as the one provided (calling the base class constructor from your subclass constructor) and implement the abstract getIdValue(java.lang.Object) method in your subclass. You can also override the provided getAttributeName() method to change the name used for the IDREF attribute. Note that this class can only be used when the definitions precede the references in the XML document; if a referenced ID is not defined the unmarshaller throws an exception.

Author:

Dennis M. Sosnoski

Constructor Summary

IdRefMapperBase(java.lang.String uri, int index, java.lang.String name)
Aliased constructor taking a name definition for the element.

Method Summary

boolean	isExtension(java.lang.String mapname) Check if marshaller represents an extension mapping.
boolean	isPresent(IUnmarshallingContext ctx) Check if instance present in XML.
void	marshal(java.lang.Object obj, IMarshallingContext ictx) Marshal instance of handled class.
java.lang.Object	unmarshal(java.lang.Object obj, IUnmarshallingContext ictx) Unmarshal instance of handled class.

Methods inherited from class java.lang.Object

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

Constructor Detail

IdRefMapperBase

public IdRefMapperBase(java.lang.String uri,
                       int index,
                       java.lang.String name)

Aliased constructor taking a name definition for the element. The subclass version will be used by JiBX to define the element name to be used with this custom marshaller/unmarshaller.

Parameters:

uri - namespace URI for the top-level element

index - namespace index corresponding to the defined URI within the marshalling context definitions

name - local name for the top-level element

Method Detail

isExtension

public boolean isExtension(java.lang.String mapname)

Description copied from interface: IMarshaller

Check if marshaller represents an extension mapping. This is used by the framework in generated code to verify compatibility of objects being marshalled using an abstract mapping.

Specified by:

isExtension in interface IMarshaller

Parameters:

mapname - marshaller mapping name (generally the class name to be handled, or abstract mapping type name)

Returns:

true if this mapping is an extension of the abstract mapping, false if not

marshal

public void marshal(java.lang.Object obj,
                    IMarshallingContext ictx)
             throws JiBXException

Description copied from interface: IMarshaller

Marshal instance of handled class. This method call is responsible for all handling of the marshalling of an object to XML text. It is called at the point where the start tag for the associated element should be generated.

Specified by:

marshal in interface IMarshaller

Parameters:

obj - object to be marshalled (may be null if property is not optional)

ictx - XML text output context

Throws:

JiBXException - on error in marshalling process

isPresent

public boolean isPresent(IUnmarshallingContext ctx)
                  throws JiBXException

Description copied from interface: IUnmarshaller

Check if instance present in XML. This method can be called when the unmarshalling context is positioned at or just before the start of the data corresponding to an instance of this mapping. It verifies that the expected data is present.

Specified by:

isPresent in interface IUnmarshaller

Parameters:

ctx - unmarshalling context

Returns:

true if expected parse data found, false if not

Throws:

JiBXException - on error in unmarshalling process

unmarshal

public java.lang.Object unmarshal(java.lang.Object obj,
                                  IUnmarshallingContext ictx)
                           throws JiBXException

Description copied from interface: IUnmarshaller

Unmarshal instance of handled class. This method call is responsible for all handling of the unmarshalling of an object from XML text, including creating the instance of the handled class if an instance is not supplied. When it is called the unmarshalling context is always positioned at or just before the start tag corresponding to the start of the class data.

Specified by:

unmarshal in interface IUnmarshaller

Parameters:

obj - object to be unmarshalled (may be null)

ictx - unmarshalling context

Returns:

unmarshalled object (may be null)

Throws:

JiBXException - on error in unmarshalling process