Listar cadastros num DataTable (JPA,JSF,Hibernate)

package faces;
import entity.HibernateUtil;
import entity.Usuario;
import entity.dao.UsuarioJpaController;
import java.util.List;
import javax.management.Query;
 
public class UsuarioFace {
       public UsuarioFace() {
    }
     
   public UsuarioJpaController userDAO = new UsuarioJpaController();
   public Usuario selectedUser;
       
         
    public String doAddUser(){
        selectedUser = new Usuario();
        return "gotoAddNewUser";  
    
    }
    public String finishAddUser(){
        userDAO.create(selectedUser);
          return "teste";  
    
    
    }
    public Usuario getSelectedUser() {
        return selectedUser;
    }
    public void setSelectedUser(Usuario selectedUser) {
        this.selectedUser = selectedUser;
    }
   
}
[/code ]
 
***************************************
Este é meu JPA Controller
 
 
[code]
package entity.dao;
import entity.Usuario;
import entity.dao.exceptions.NonexistentEntityException;
import java.io.Serializable;
import java.util.List;
import javax.faces.convert.Converter;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import javax.persistence.EntityNotFoundException;
import javax.persistence.Persistence;
import javax.transaction.UserTransaction;
public class UsuarioJpaController implements Serializable {
    public UsuarioJpaController(){
                emf = Persistence.createEntityManagerFactory("CompletaAppPU");
    }
    private UserTransaction utx = null;
    private EntityManagerFactory emf = null;
    public EntityManager getEntityManager() {
        return emf.createEntityManager();
    }
    public void create(Usuario usuario) {
        EntityManager em = null;
        try {
            em = getEntityManager();
            em.getTransaction().begin();
            em.persist(usuario);
            em.getTransaction().commit();
        } finally {
            if (em != null) {
                em.close();
            }
        }
    }
    public void edit(Usuario usuario) throws NonexistentEntityException, Exception {
        EntityManager em = null;
        try {
            em = getEntityManager();
            em.getTransaction().begin();
            usuario = em.merge(usuario);
            em.getTransaction().commit();
        } catch (Exception ex) {
            String msg = ex.getLocalizedMessage();
            if (msg == null || msg.length() == 0) {
                Long id = usuario.getId();
                if (findUsuario(id) == null) {
                    throw new NonexistentEntityException("The usuario with id " + id + " no longer exists.");
                }
            }
            throw ex;
        } finally {
            if (em != null) {
                em.close();
            }
        }
    }
    public void destroy(Long id) throws NonexistentEntityException {
        EntityManager em = null;
        try {
            em = getEntityManager();
            em.getTransaction().begin();
            Usuario usuario;
            try {
                usuario = em.getReference(Usuario.class, id);
                usuario.getId();
            } catch (EntityNotFoundException enfe) {
                throw new NonexistentEntityException("The usuario with id " + id + " no longer exists.", enfe);
            }
            em.remove(usuario);
            em.getTransaction().commit();
        } finally {
            if (em != null) {
                em.close();
            }
        }
    }
    public List<Usuario> findUsuarioEntities() {
        return findUsuarioEntities(true, -1, -1);
    }
    public List<Usuario> findUsuarioEntities(int maxResults, int firstResult) {
        return findUsuarioEntities(false, maxResults, firstResult);
    }
    private List<Usuario> findUsuarioEntities(boolean all, int maxResults, int firstResult) {
        EntityManager em = getEntityManager();
        try {
            Query q = em.createQuery("select object(o) from Usuario as o");
            if (!all) {
                q.setMaxResults(maxResults);
                q.setFirstResult(firstResult);
            }
            return q.getResultList();
        } finally {
            em.close();
        }
    }
    public Usuario findUsuario(Long id) {
        EntityManager em = getEntityManager();
        try {
            return em.find(Usuario.class, id);
        } finally {
            em.close();
        }
    }
    public int getUsuarioCount() {
        EntityManager em = getEntityManager();
        try {
            Query q = em.createQuery("select count(o) from Usuario as o");
            return ((Long) q.getSingleResult()).intValue();
        } finally {
            em.close();
        }
    }
        
    
}

public class Usuario implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String nome;
    private int idade;
    private String telefone;
  
    public int getIdade() {
        return idade;
    }
    public void setIdade(int idade) {
        this.idade = idade;
    }
    public String getNome() {
        return nome;
    }
    public void setNome(String nome) {
        this.nome = nome;
    }
    public String getTelefone() {
        return telefone;
    }
    public void setTelefone(String telefone) {
        this.telefone = telefone;
    }
    
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }
    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Usuario)) {
            return false;
        }
        Usuario other = (Usuario) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }
    @Override
    public String toString() {
        return "entity.Usuario[ id=" + id + " ]";
    }
    
}

 
public class HibernateUtil {
     private static final long serialVersionUID = 1L;
    private static HibernateUtil me;
    private SessionFactory sessionFactory;
   public static final ThreadLocal<Session> session = new ThreadLocal<Session>(); 
    
    
    
    private HibernateUtil(){
        sessionFactory = new AnnotationConfiguration()
        .setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect")
        .setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver")         
        .setProperty("hibernate.connection.url", "jdbc:mysql://200*******")            
        .setProperty("hibernate.connection.username", "****")           
        .setProperty("hibernate.connection.password", "1234")           
        .setProperty("hibernate.hbm2ddl.auto", "none")            
        .setProperty("hibernate.show_sql", "true")           
        .setProperty("hibernate.format_sql", "true")           
        .setProperty("hibernate.c3p0.acquire_increment", "1")            
        .setProperty("hibernate.c3p0.idle_test_period", "100")           
        .setProperty("hibernate.c3p0.max_size", "10")            
        .setProperty("hibernate.c3p0.max_statements", "0")           
        .setProperty("hibernate.c3p0.min_size", "5")    
        .setProperty("hibernate.c3p0.timeout", "100")  
        .addAnnotatedClass(Usuario.class)
        .buildSessionFactory();       
    
   
    }
    
    public Session getSession(){
    Session toReturn = sessionFactory.openSession();
    toReturn.beginTransaction();
    return toReturn;
    
    }
    
    public static HibernateUtil getInstance() {
        if (me == null) {
            me = new HibernateUtil();
        }
        return me;
    }
        
   
       
   
    
    
}