@Override
public boolean usesJoinTable() {
if (associationAttribute.getMappedBy() != null) {
throw new IllegalStateException(
"Cannot determine if a join table is used because plural attribute is not the owner.");
}
// By default, a unidirectional one-to-many (i.e., with mappedBy == null) uses a join table,
// unless it has join columns defined.
return associationAttribute.getJoinTableAnnotation() != null
|| (associationAttribute.getJoinTableAnnotation() == null
&& associationAttribute.getJoinColumnValues().size() == 0);
}
@Override
public TableSpecificationSource getCollectionTableSpecificationSource() {
// todo - see org.hibernate.metamodel.internal.Binder#bindOneToManyCollectionKey
// todo - needs to cater for @CollectionTable and @JoinTable
if (associationAttribute.getMappedBy() != null) {
throw new IllegalStateException(
"Cannot get collection table because this association is not the owner.");
}
final AnnotationInstance joinTableAnnotation = associationAttribute.getJoinTableAnnotation();
return joinTableAnnotation == null
? null
: new TableSourceImpl(joinTableAnnotation, entityClass.getLocalBindingContext());
}
