MapJoin#entry() does not seem to work, when Criteria API is used:
Example:
{code}
EntityManager entityManager = emf.createEntityManager();
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Map.Entry> query = criteriaBuilder.createQuery(Map.Entry.class);
Root<Customer> customer = query.from(Customer.class);
MapJoin<Customer, String, Order> orderMap = customer.join(Customer_.orderMap);
query.select(orderMap.entry());
TypedQuery<Map.Entry> typedQuery = entityManager.createQuery(query);//exception thrown here
List<Map.Entry> resultList = typedQuery.getResultList();
-------------
{code}
ends up in :
{code}
java.lang.ClassCastException: org.hibernate.metamodel.internal.PluralAttributeImpl$MapAttributeImpl cannot be cast to org.hibernate.query.criteria.internal.Renderable
at org.hibernate.query.criteria.internal.expression.MapEntryExpression.path(MapEntryExpression.java:62)
at org.hibernate.query.criteria.internal.expression.MapEntryExpression.renderProjection(MapEntryExpression.java:56)
-------------------- {code}
Whereas JPQL is working fine:
------------------- {code}
EntityManager em = emf.createEntityManager();
TypedQuery<Map.Entry> query =
em.createQuery("SELECT ENTRY(mp) FROM Customer c JOIN c.orderMap mp",
Map.Entry.class);
List<Map.Entry> resultList = query.getResultList();
Assert.assertTrue(resultList.size()==1);
Assert.assertEquals("online", resultList.get(0).getKey());
------------- {code}
Unit test is attached.
Thanks
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