[OPENJPA-212] Constructor expression permits no other expressions in SELECT clause

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.9.7
• Component/s: query
• Assignee: Unassigned
• Reporter: Jacek Laskowski
• Created: 10/Apr/07 14:04
• Updated: 02/May/13 02:29

Description

It seems that it's impossible to run a query with constructor expression beside other expressions in SELECT clause. Take a look at the following test that finishes with ClassCastException when the first element of resultQuery is returned (the 2nd line of the snippet). Am I doing something plain wrong?

It doesn't work with Hibernate EntityManager 3.3.1, either yet TopLink Essentials 2.0 BUILD 40 runs fine.

Query query = em.createQuery("SELECT NEW pl.jaceklaskowski.jpa.PewnaKlasa(p.nazwa, o.imie, o.nazwisko, o.numer), o, p.nazwa FROM Projekt p JOIN p.chair o");
List<Object[]> resultQuery = query.getResultList();
final Object[] firstElementInQueryResult = resultQuery.get(0);
assert firstElementInQueryResult.length == 3;
final Object firstElement = resultQuery.get(0)[0];
assert firstElement instanceof PewnaKlasa;
final Object secondElement = resultQuery.get(0)[1];
assert secondElement instanceof Osoba;
final Object thirdElement = resultQuery.get(0)[2];
assert thirdElement instanceof String;

The exception is as follows (the line number is different though as the test above is incomplete - no class, imports and alike are shown):

java.lang.ClassCastException: pl.jaceklaskowski.jpa.PewnaKlasa
at pl.jaceklaskowski.jpa.OpenJPATest.testConstructorExpr(OpenJPATest.java:19)

Issue Links

• depends upon: OPENJPA-1261 JPQL query result shape for multi-selections including multi-select-new-constructor