package controles;
import controles.exceptions.NonexistentEntityException;
import entidades.Cliente;
import java.io.Serializable;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import javax.persistence.EntityNotFoundException;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
/**
*
* @author Angel
*/
public class ClienteJpaController implements Serializable {
public ClienteJpaController(EntityManagerFactory emf) { this.emf = emf;
}
private EntityManagerFactory emf = null;
public EntityManager getEntityManager() { return emf.createEntityManager();
}
public void create(Cliente cliente) { EntityManager em = null;
try { em = getEntityManager();
em.getTransaction().begin();
em.persist(cliente);
em.getTransaction().commit();
} finally { if (em != null) { em.close();
}
}
}
public void edit(Cliente cliente) throws NonexistentEntityException, Exception { EntityManager em = null;
try { em = getEntityManager();
em.getTransaction().begin();
cliente = em.merge(cliente);
em.getTransaction().commit();
} catch (Exception ex) { String msg = ex.getLocalizedMessage();
if (msg == null || msg.length() == 0) { Integer id = cliente.getIdCliente();
if (findCliente(id) == null) { throw new NonexistentEntityException("The cliente with id " + id + " no longer exists."); }
}
throw ex;
} finally { if (em != null) { em.close();
}
}
}
public void destroy (Integer id) throws NonexistentEntityException { EntityManager em = null;
try { em = getEntityManager();
em.getTransaction().begin();
Cliente cliente;
try { cliente = em.getReference(Cliente.class, id);
cliente.getIdCliente();
} catch (EntityNotFoundException enfe) { throw new NonexistentEntityException("The cliente with id " + id + " no longer exists.", enfe); }
em.remove(cliente);
em.getTransaction().commit();
} finally { if (em != null) { em.close();
}
}
}
public List<Cliente> findClienteEntities() { return findClienteEntities(true, -1, -1);
}
public List<Cliente> findClienteEntities(int maxResults, int firstResult) { return findClienteEntities(false, maxResults, firstResult);
}
private List<Cliente> findClienteEntities(boolean all, int maxResults, int firstResult) { EntityManager em = getEntityManager();
try { CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
cq.select(cq.from(Cliente.class));
Query q = em.createQuery(cq);
if (!all) { q.setMaxResults(maxResults);
q.setFirstResult(firstResult);
}
return q.getResultList();
} finally { em.close();
}
}
public Cliente findCliente(Integer id) { EntityManager em = getEntityManager();
try { return em.find(Cliente.class, id);
} finally { em.close();
}
}
public int getClienteCount() { EntityManager em = getEntityManager();
try { CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
Root<Cliente> rt = cq.from(Cliente.class);
cq.select(em.getCriteriaBuilder().count(rt));
Query q = em.createQuery(cq);
return ((Long) q.getSingleResult()).intValue();
} finally { em.close();
}
}
}
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