com.neurosys.ecom.etl

Class SequenceSubOrderTransformer<S extends SubOrder>

java.lang.Object

com.neurosys.ecom.etl.SequenceSubOrderTransformer<S>

Type Parameters:

S - as SubOrder

All Implemented Interfaces:

UpdatableContext<javax.persistence.EntityManager>, Serializable, org.apache.commons.collections.Transformer

public class SequenceSubOrderTransformer<S extends SubOrder>
extends Object
implements org.apache.commons.collections.Transformer, Serializable, UpdatableContext<javax.persistence.EntityManager>

For a SubOrder that has a root, we need to determine its previous position and persist that. It will determine the #getExistingLast() a and then link the current to the previous last as the new last.

The persistence will only occur if there is an existing last SubOrder to link to; or else nothing changes.

Author:

Arjun Dhar

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SequenceSubOrderTransformer()

Method Summary

Modifier and Type	Method and Description
javax.persistence.EntityManager	getEntityManager()
S	getExistingLast(S so) Get the existing last SubOrder entity for the shares root Order between the new (as param) and any existing suborders for that root.
void	setEntityManager(javax.persistence.EntityManager entityManager)
Object	transform(Object input)
void	updateContext(javax.persistence.EntityManager em)

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceSubOrderTransformer

public SequenceSubOrderTransformer()

Method Detail

getExistingLast

public S getExistingLast(S so)

Get the existing last SubOrder entity for the shares root Order between the new (as param) and any existing suborders for that root.

Parameters:

so - as SubOrder type

Returns:

transform

@Transactional(readOnly=false)
public Object transform(Object input)

Specified by:

transform in interface org.apache.commons.collections.Transformer

getEntityManager

public javax.persistence.EntityManager getEntityManager()

setEntityManager

public void setEntityManager(javax.persistence.EntityManager entityManager)

updateContext

public void updateContext(javax.persistence.EntityManager em)

Specified by:

updateContext in interface UpdatableContext<javax.persistence.EntityManager>