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Matt
On 7/10/07, Leo Barrientos C <[EMAIL PROTECTED]> wrote:
Hello, does anybody know how to implement the State Pattern with JPA
using only em.find and @tags?
I need to get a Object with a concrete state object only doing em.find ,
The entity table has a id name and id_state fields; so if the id_state
is 0 i need the ConcreteStateA loaded in actualState and if 1
ConcreteStateB in actualState.
I've been reading a lot, but no answers founded ..... helpme.
My entity is:
public class Cuenta implements Serializable {
private static EntityManagerFactory emf =
Persistence.createEntityManagerFactory("BancoUnidadDePersistencia");
@Id
@Column(name = "id", nullable = false)
private Integer id;
@Column(name = "id_cliente", nullable = false)
private int idCliente;
@Column(name = "fecha_apertura", nullable = false)
@Temporal(TemporalType.TIMESTAMP)
private Date fechaApertura;
@Column(name = "id_estado", nullable = false)
private int idEstado;
@Transient
private AccountState actualState;
@Transient
private float saldo;
/** Creates a new instance of Cuenta */
public Cuenta() {
}
..........................................
public void execute(){
this.actualState.execute();
}
}
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