de.must.dataobj

Interface AssoDataObjectInterface

All Known Implementing Classes:

AssoDataObject, AssoDataObjectForPrep

public interface AssoDataObjectInterface

Interface for data object which is used for n:m relationships between other data objects.

Method Summary

Modifier and Type	Method and Description
boolean	isLinked(Identifier ownerNi, Identifier keyNi) Indicates whether the relationship exists or not.
void	link(Identifier ownerNi, Identifier keyNi) Links the association
void	unlink(Identifier ownerNi, Identifier keyNi) Unlinks the association

Method Detail

isLinked

boolean isLinked(Identifier ownerNi,
                 Identifier keyNi)

Indicates whether the relationship exists or not. Although this function is provided by DataObject in simple way (isQueryFindingRecords), it may be a good idea to optimize it by using a prepared statement

Parameters:

ownerNi - the primary key of the owner

keyNi - the primary key of the associated entity return true if the relationship exists

link

void link(Identifier ownerNi,
          Identifier keyNi)

Links the association

Parameters:

ownerNi - the primary key of the owner

keyNi - the primary key of the associated entity

unlink

void unlink(Identifier ownerNi,
            Identifier keyNi)

Unlinks the association

Parameters:

ownerNi - the primary key of the owner

keyNi - the primary key of the associated entity