org.datanucleus.store.scostore

Interface PersistableRelationStore

All Superinterfaces:

Store

public interface PersistableRelationStore
extends Store

Representation of the relation between two persistable objects. Provides the connectivity to the datastore allowing the relation to be managed separately. In an RDBMS sense, this is for an N-1 unidirectional join table relation, and represents the join table entry.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(ObjectProvider op1, ObjectProvider op2) Method to add the relation between the provided objects.
boolean	remove(ObjectProvider op1) Method to remove the relation from the provided object.
boolean	update(ObjectProvider op1, ObjectProvider op2) Method to update the relation for the first object to relate to the second object.

Methods inherited from interface org.datanucleus.store.scostore.Store

getOwnerMemberMetaData, getStoreManager

Method Detail

add

boolean add(ObjectProvider op1,
          ObjectProvider op2)

Method to add the relation between the provided objects.

Parameters:

op1 - Object 1 provider

op2 - Object 2 provider

Returns:

Whether the relation was added

remove

boolean remove(ObjectProvider op1)

Method to remove the relation from the provided object.

Parameters:

op1 - Object 1 provider

Returns:

Whether the relation was removed

update

boolean update(ObjectProvider op1,
             ObjectProvider op2)

Method to update the relation for the first object to relate to the second object. This removes any previous relation from this object and replaces it with the new relation.

Parameters:

op1 - Object 1 provider

op2 - Object 2 provider

Returns:

Whether the relation was replaced