Subgraph<K> addMapKeySubgraph(
  MapAttribute<? super T,K,?> attribute
)

Add a node to the graph that corresponds to a map key that is a managed type. This allows for construction of multi-node entity graphs that include related managed types.

Parameters:

attribute - attribute

Returns:

subgraph for the key attribute.

Throws:

IllegalStateException - if this EntityGraph has been statically defined.

IllegalArgumentException - if the attribute's target type is not a managed type entity.

Since:

Jakarta Persistence (JPA) 1.0