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When I specify columns in my jpql/jpa 2.0 query, i.e. select p.id, p.lastName, p.firstName from Profile p where p.group = :group I get the following error: [Ljava.lang.Object; cannot be cast to com.profs.ws.Profile... Anyone know how to resolve this casting issue?
The Profile entity class itself has properties of the following types: String, int, and Collection. The properties I’m selecting in the query are either of the type String or int.
When you specify properties of an object, JPA returns the list of
Object[]. You can cast the return value toList<Object[]instead ofList<Profile>to avoid theClassCastException. If you are using Hibernate as JPA provider, you can map the select clause to a new object. See select clause documentation for details.