jpa使用sql查詢爲map結果

Query query = entityManager
                  .createNativeQuery("select id, name, age from t_user");
    query.unwrap(SQLQuery.class)
               .setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP); 
	List<Map<String, Object>> itemlist = (List<Map<String, Object>>) query.getResultList();