Can javax.persistence.Query.getResultList() return null?

Question

And if so, under what circumstances?

Javadoc and JPA spec says nothing.

Answer 1

Given the implementation of getResultsList() in org.hibernate.ejb.QueryImpl class, it is possible to return a null :

public List getResultList() {
    try {
        return query.list();
    }
    catch (QueryExecutionRequestException he) {
        throw new IllegalStateException(he);
    }
    catch( TypeMismatchException e ) {
        throw new IllegalArgumentException(e);
    }
    catch (HibernateException he) {
        em.throwPersistenceException( he );
        return null;
    }

My hibernate version is: 3.3.1.GA