Example of DAO implementation for Hibernate Criteria Query -> Find By Id
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... @Repository public class JpaModelDaoImpl implements JpaModelDao { @PersistenceContext private EntityManager em; ... @Override public ModelEntity findById (int modelId) { CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery<ModelEntity> cq = cb.createQuery(ModelEntity.class); Root<ModelEntity> model = cq.from(ModelEntity.class); cq.where(cb.equal(model.get("id"), modelId)); TypedQuery<ModelEntity> q = em.createQuery(cq); return q.getSingleResult(); } ... } |
Model class has attribute: id
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