ADF BC Entity Associations

Question

I have two Entities that have an association/relationship. When the parent entity is created it gets a DB sequence as its primary key. When the child entity is created it also gets a DB sequence as its primary key (different DB sequence). The child key has a foreign key/attribute that needs to be set referencing the primary key of the parent entity.
In the ADF BC EntityImpl, both entities expose their accessor methods of the association. When I attempt to retrieve the primary key of the parent entity through the associated entity, it returns null.
The following snipet is from the child entity:
protected void create(AttributeList AttributeList) {
super.create(AttributeList);
DBTransaction dbTrans = getDBTransaction();
SequenceImpl seq = new SequenceImpl("ID_SEQ", dbTrans);
setTherapyId(seq.getSequenceNumber().toString());
setIDFromParent(getEntityAuth().getAuthorizationNum()); // This returns null pointer error
How do I go about retrieving the primary key of the parent entity from the child entity?
Any help would be appreciated.
/**Gets the associated entity EntityAuthImpl
public EntityAuthImpl getEntityAuth() {
return (EntityAuthImpl)getAttributeInternal(ENTITYAUTH);
}

Answer 1

I am still unable to access the source EntityImpl from the destination EntityImpl.
From the the destination entity there is a source EntityImpl. But, when I attempt to access any methods/attributes of the source implementation, it returns null.
Just a follow-up: I have two entities that have an association. Both entities have overridden the Create method so that I can retrieve separate db sequences. I create the source entity first and all goes well, then the destination entity is created.
When I create the destination entity I am attempting to access the associated source EntityImpl and set an attribute in the destination entity to a source entity attribute value.
The destination EntityImpl does provide getter/setter methods for the source EntityImpl. But, again when I attempt to use the getter method it returns null.
Can I actually access the source EntityImpl from the destination EntityImpl or I am mislead?
Any help appreciated.