Hi, i got the following exception when i run my code

Hibernate: select rol0_.ROL_ID as ROL1_6_0_, rol0_.ADMINISTRADOR as ADMINIST2_6_0_, rol0_.DESCRIPCION as DESCRIPC3_6_0_, rol0_.HABIL
ITADO as HABILITADO6_0_, rol0_.NOTAS as NOTAS6_0_ from ROL rol0_ where rol0_.ROL_ID=?
17:21:47,640 ERROR [STDERR] java.lang.ClassCastException: ar.com.ebizlink.server.models.Rol
17:21:47,640 ERROR [STDERR] at $Proxy97.getRol(Unknown Source)
17:21:47,640 ERROR [STDERR] at ar.com.ebizlink.console.controllers.RolController.edit(Unknown Source)

My enviroment is:
jboss-4.0.5.GA, jems installer (ejb3 instalation)
j2sdk1.5.0_09
jboss-eclipse 1.5
and the files are listed next ...

Rol.java

package ar.com.ebizlink.server.models;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "ROL")
public class Rol implements java.io.Serializable {

 private static final long serialVersionUID = 1L;

 // Fields
 private Long rolId;

 private String descripcion;

 private Boolean habilitado;

 private Boolean administrador;

 private String notas;

 // Constructors

 /** default constructor */
 public Rol() {
 }

 /** minimal constructor */
 public Rol(Long rolId) {
 this.rolId = rolId;
 }

 /** full constructor */
 public Rol(Long rolId, String descripcion, Boolean habilitado,
 Boolean administrador, String notas) {
 this.rolId = rolId;
 this.descripcion = descripcion;
 this.habilitado = habilitado;
 this.administrador = administrador;
 this.notas = notas;
 }

 // Property accessors
 @Id
 @GeneratedValue
 @Column(name = "ROL_ID", unique = true, nullable = false, insertable = true, updatable = true)
 public Long getRolId() {
 return this.rolId;
 }

 public void setRolId(Long rolId) {
 this.rolId = rolId;
 }

 @Column(name = "DESCRIPCION", unique = false, nullable = true, insertable = true, updatable = true, length = 50)
 public String getDescripcion() {
 return this.descripcion;
 }

 public void setDescripcion(String descripcion) {
 this.descripcion = descripcion;
 }

 @Column(name = "HABILITADO", unique = false, nullable = true, insertable = true, updatable = true)
 public Boolean getHabilitado() {
 return this.habilitado;
 }

 public void setHabilitado(Boolean habilitado) {
 this.habilitado = habilitado;
 }

 @Column(name = "ADMINISTRADOR", unique = false, nullable = true, insertable = true, updatable = true)
 public Boolean getAdministrador() {
 return this.administrador;
 }

 public void setAdministrador(Boolean administrador) {
 this.administrador = administrador;
 }

 @Column(name = "NOTAS", unique = false, nullable = true, insertable = true, updatable = true, length = 100)
 public String getNotas() {
 return this.notas;
 }

 public void setNotas(String notas) {
 this.notas = notas;
 }

}

RolManager.java

package ar.com.ebizlink.server.interfaces;

import java.util.List;

import javax.ejb.Local;

import ar.com.ebizlink.server.models.Rol;

@Local
public interface RolManager {

 public Rol getRol(Long rolId);

 public List<Rol> getRoles();

 public void save(Rol detached);

 public void delete(Long rolId);
}

The bean instance

package ar.com.ebizlink.server.beans;

import java.util.List;

import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import ar.com.ebizlink.server.interfaces.RolManager;
import ar.com.ebizlink.server.models.Rol;

@Stateless
public class RolManagerBean implements RolManager {

 @PersistenceContext
 private EntityManager em;

 public Rol getRol(Long rolId) {
 return em.find(Rol.class, rolId);
 // Query query = em.createQuery("select r from Rol r where r.rolId =
 // :rolId");
 // query.setParameter("rolId", rolId);
 // return (Rol)query.getSingleResult();
 }

 @SuppressWarnings("unchecked")
 public List<Rol> getRoles() {
 return em.createQuery("from Rol").getResultList();
 }

 @TransactionAttribute(TransactionAttributeType.REQUIRED)
 public void save(Rol detached) {
 Rol rol = getCurrent(detached.getRolId());
 rol.setAdministrador(detached.getAdministrador());
 rol.setDescripcion(detached.getDescripcion());
 rol.setHabilitado(detached.getHabilitado());
 rol.setNotas(detached.getNotas());
 em.persist(rol);
 }

 @TransactionAttribute(TransactionAttributeType.MANDATORY)
 private Rol getCurrent(Long rolId) {
 Rol rol = getRol(rolId);
 if (rol == null) {
 rol = new Rol();
 em.persist(rol);
 }
 return rol;
 }

 @TransactionAttribute(TransactionAttributeType.REQUIRED)
 public void delete(Long rolId) {
 Rol rol = getRol(rolId);
 em.remove(rol);
 }

}

JSF CODE - RolController.java

package ar.com.ebizlink.console.controllers;

import java.util.List;

import ar.com.ebizlink.console.forms.RolForm;
import ar.com.ebizlink.server.interfaces.RolManager;
import ar.com.ebizlink.server.models.Rol;
import ar.com.ulink.framework.commons.tokens.CommonsTokens;
import ar.com.ulink.framework.ejb3.EJB3ServiceLocator;
import ar.com.ulink.framework.mvc.jsf.JsfUtility;

public class RolController {

 private RolForm rolForm;

 public final RolForm getRolForm() {
 return rolForm;
 }

 public final void setRolForm(RolForm rolForm) {
 this.rolForm = rolForm;
 }

 // THIS METHOD WORKS FINE !!

 public final List<Rol> getRoles() {
 List<Rol> roles = null;
 try {
 RolManager rolManager = (RolManager) EJB3ServiceLocator
 .getEjbInterface("ebizlink/RolManagerBean/local");
 roles = rolManager.getRoles();
 } catch (Exception e) {
 e.printStackTrace();
 }
 return roles;
 }

 // HOWEVER, THIS ONE CRASH !!
 // when execute : Rol rol = rolManager.getRol(rolId);

 public final String edit() {

 // Status a devolver.
 String actionForward = CommonsTokens.EDIT_SUCCESS;

 // Tomo el parametro del rol a modificar.
 Long rolId = Long.valueOf(JsfUtility.getObjectFromContext("rolId")
 .toString());

 System.out.println("************* RolId: " + rolId);

 try {
 // Obtengo el rol a modificar.
 RolManager rolManager = (RolManager) EJB3ServiceLocator
 .getEjbInterface("ebizlink/RolManagerBean/local");

 System.out.println("************* paso 2, RolId: " + rolId);

 // Here's the exception
 Rol rol = rolManager.getRol(rolId);

 System.out.println("************* paso 3, RolId: " + rolId);

 // Asigno los datos al form.
 rolForm.setAdministrador(rol.getAdministrador());
 rolForm.setDescripcion(rol.getDescripcion());
 rolForm.setHabilitado(rol.getHabilitado());
 rolForm.setNotas(rol.getNotas());
 rolForm.setRolId(rol.getRolId());

 } catch (Exception e) {
 actionForward = CommonsTokens.EDIT_FAILURE;
 e.printStackTrace();
 }

 // Forward del formulario.
 return actionForward;
 }

}

i have the exception mentioned earlier and i dont have any clue where the probles is ...

any ideas ??

Regards
Mariano