">Map<K,V>-valued attribute.">
Jakarta Persistence (JPA) Method

MapJoin<X,K,V> joinMap(
  String attributeName
)

Create an inner join to the specified Map<K,V>-valued attribute.
Parameters:
attributeName - name of the attribute for the target of the join
Returns:
the resulting join.
Throws:
IllegalArgumentException - if attribute of the given name does not exist.
Since:
Jakarta Persistence (JPA) 1.0