JPA : How to convert a native query result set to POJO class collection

Question

I am using JPA in my project.

I came to a query in which I need to make join operation on five tables. So I created a native query which returns five fields.

Answer 1

Not sure if this fits here, but I had similar question and found following simple solution/example for me:

private EntityManager entityManager;
...
    final String sql = " SELECT * FROM STORE "; // select from the table STORE
    final Query sqlQuery = entityManager.createNativeQuery(sql, Store.class);

    @SuppressWarnings("unchecked")
    List results = (List) sqlQuery.getResultList();

In my case I had to use SQL parts defined in Strings somewhere else, so I could not just use NamedNativeQuery.