com.edu.rodriguez.dao.ContactoDao.java Source code

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Here is the source code for com.edu.rodriguez.dao.ContactoDao.java

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package com.edu.rodriguez.dao;

import com.edu.rodriguez.entity.Contacto;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;

/**
 *
 * @author emrodriguez
 */
public class ContactoDao {
    private Session sesion;
    private Transaction tx;

    private void iniciaOperacion() throws HibernateException {
        sesion = Conexion.getSessionFactory().openSession();
        tx = sesion.beginTransaction();
    }

    private void manejaExcepcion(HibernateException he) throws HibernateException {
        tx.rollback();
        throw new HibernateException("Ocurrip un error en la capa de acceso a datos", he);
    }

    public void guardarContacto(Contacto contacto) throws HibernateException {
        try {
            System.out.println("Ingreso");
            iniciaOperacion();
            sesion.save(contacto);
            tx.commit();
        } catch (HibernateException he) {
            manejaExcepcion(he);
            throw he;
        } finally {
            sesion.close();
        }
    }

    public void actualizarContacto(Contacto contacto) throws HibernateException {
        try {
            iniciaOperacion();
            sesion.update(contacto);
            tx.commit();
        } catch (HibernateException he) {
            manejaExcepcion(he);
            throw he;
        } finally {
            sesion.close();
        }
    }

    public void eliminarContacto(Contacto contacto) throws HibernateException {
        try {
            iniciaOperacion();
            sesion.delete(contacto);
            tx.commit();
        } catch (HibernateException he) {
            manejaExcepcion(he);
            throw he;
        } finally {
            sesion.close();
        }
    }

    public Contacto obtenerContacto(Integer idContacto) throws HibernateException {
        Contacto contacto = null;
        try {
            iniciaOperacion();
            contacto = (Contacto) sesion.get(Contacto.class, idContacto);
        } finally {
            sesion.close();
        }
        return contacto;
    }

    public List<Contacto> obtenerListaContactos() {
        List<Contacto> listaContactos = null;
        try {
            iniciaOperacion();
            listaContactos = sesion.createQuery("from Contacto").list();
        } finally {
            sesion.close();
        }

        return listaContactos;
    }

}