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 Post subject: Using joined-subclass, and inheritance - Help -
PostPosted: Thu Oct 15, 2009 10:51 am 
Newbie

Joined: Thu Oct 15, 2009 10:34 am
Posts: 1
I am trying to write a sample app that uses the joined-subclass feature in hibernate. I am using the Empleado (Empleyed) and Contador (Counter).

I can only run the method to add a counter, I can not delete, or list. I dont know what is the problem, help me please!!!

Any help would be get me is very welcome.

Sorry about my English.

Mapped The Employee
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http.......://......hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 14-oct-2009 18:49:38 by Hibernate Tools 3.2.1.GA polymorphism="implicit"-->
<hibernate-mapping>
<class catalog="escuela" name="ClasesYMapeos.Empleado" table="empleados">

<id name="empleadoId" column="EmpleadoID">
<generator class="identity"/>
</id>

<property name="nombre" type="string">
<column length="45" name="Nombre" not-null="true"/>
</property>
<property name="apellido" type="string">
<column length="45" name="Apellido" not-null="true"/>
</property>

<joined-subclass name="ClasesYMapeos.Contador" table="Contadores">
<key column="EmpleadoId"/>
<property column="Sector" name="Sector" type="java.lang.String"/>
</joined-subclass>
</class>
</hibernate-mapping>



Clase Empleado (Class employee)
package ClasesYMapeos;
// Generated 14-oct-2009 18:49:36 by Hibernate Tools 3.2.1.GA


public class Empleado implements java.io.Serializable {


private int empleadoId;
private String nombre;
private String apellido;

public Empleado() {
}

public Empleado(int empleadoId, String nombre, String apellido) {
this.empleadoId = empleadoId;
this.nombre = nombre;
this.apellido = apellido;
}

public int getEmpleadoId() {
return this.empleadoId;
}

public void setEmpleadoId(int empleadoId) {
this.empleadoId = empleadoId;
}
public String getNombre() {
return this.nombre;
}

public void setNombre(String nombre) {
this.nombre = nombre;
}
public String getApellido() {
return this.apellido;
}

public void setApellido(String apellido) {
this.apellido = apellido;
}
}

Clase Contador (Class Counter)
Package ClasesYMapeos;

public class Contador extends Empleado implements java.io.Serializable{


private int empleadoId;
private String sector;

public Contador() {
}

public Contador(String sector) {
this.sector = sector;
}


public int getEmpleadoId() {
return this.empleadoId;
}

public void setEmpleadoId(int empleadoId) {
this.empleadoId = empleadoId;
}

public String getSector() {
return this.sector;
}

public void setSector(String sector) {
this.sector = sector;
}

}

Clase ServiciosContadores (Class ServiceCounter)

package Servicios;

/* Clases Que Realizamos */
import ClasesYMapeos.Contador;
import HibernateUtil.MySessionFactory;
/* Java util */
import java.util.List;
/* Las clases necesarias pra trabajar con Hibernate */
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

public class ServiciosContadores {

public boolean newContador(Contador unContador) {
boolean creado = false;
Session session = MySessionFactory.getSession();
Transaction tx = null;
try{
tx = session.beginTransaction();
session.save(unContador);
tx.commit();
creado = true;
}catch(HibernateException he){
if(tx!=null) tx.rollback();
System.out.println(he.getMessage());
}finally{
session.close();
}
return creado;
}

public List<Contador> listCont(){
/* Iniciamo y tomamos la instancia de la session */
Session miSession = MySessionFactory.getSession();
Transaction tx = null;
List<Contador> contadores = null;

try{
miSession.beginTransaction();
/* Realizamos la consulta en HQL */
String hql = "FROM Contador";
Query q = miSession.createQuery(hql);
contadores = q.list(); /* retornamos una lista de categorias */
return contadores;
}catch(HibernateException he){
/* si pasa algun errro volvemos atrar la tansaccion */
if(tx!=null) tx.rollback();
}finally{
miSession.close();
return contadores; /* Pueder ser NULL o una lista de Categorias */
}
}
}

waiting a solution. Thank!

NicoStone.


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