model.daos.AlumnoDAO.java Source code

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Here is the source code for model.daos.AlumnoDAO.java

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package model.daos;

import controler.NewHibernateUtil;
import java.util.Collection;
import java.util.List;
import model.Alumno;
import org.hibernate.HibernateError;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

/**
 *
 * @author Mariana
 */
public class AlumnoDAO {
    public void create(Alumno a) throws Exception {
        Session session = NewHibernateUtil.getSessionFactory().openSession();
        Transaction tx = session.getTransaction();
        try {
            tx.begin();
            session.persist(a);
            //session.save(a);
            tx.commit();

            session.close();
        } catch (HibernateError he) {
            if (tx != null && tx.isActive())
                tx.rollback();
            System.out.println("Se ha cerrado la transaccion");
        }
    }

    public void update(Alumno a) throws Exception {
        Session session = NewHibernateUtil.getSessionFactory().getCurrentSession();
        Transaction tx = session.getTransaction();

        try {
            tx.begin();
            session.saveOrUpdate(a);
            tx.commit();
            session.close();
        } catch (HibernateError he) {
            if (tx != null && tx.isActive())
                tx.rollback();
            System.out.println("Se ha cerrado la transaccion");
        }
    }

    public void delete(Alumno a) throws Exception {
        Session session = NewHibernateUtil.getSessionFactory().getCurrentSession();
        Transaction tx = session.getTransaction();

        try {
            tx.begin();
            session.delete(a);
            tx.commit();
        } catch (HibernateError he) {
            if (tx != null && tx.isActive())
                tx.rollback();
            System.out.println("Se ha cerrado la transaccion");
        }
    }

    public Alumno load(Alumno a) throws Exception {
        Session session = NewHibernateUtil.getSessionFactory().getCurrentSession();
        Transaction tx = session.getTransaction();

        try {
            tx.begin();
            a = (Alumno) session.get(Alumno.class, a.getBoleta());
            tx.commit();

        } catch (HibernateError he) {
            if (tx != null && tx.isActive())
                tx.rollback();
            System.out.println("Se ha cerrado la transaccion");
        }
        return a;
    }

    public Collection loadAll() throws Exception {
        Session session = NewHibernateUtil.getSessionFactory().getCurrentSession();
        Transaction tx = session.getTransaction();
        List l = null;

        try {
            tx.begin();
            Query q = session.createQuery("from alumno");
            l = q.list();
            tx.commit();
        } catch (HibernateError he) {
            if (tx != null && tx.isActive())
                tx.rollback();
            System.out.println("Se ha cerrado la transaccion");
        }
        return l;
    }

    public Alumno login(String Bol, String cont) throws Exception {
        Session session = NewHibernateUtil.getSessionFactory().getCurrentSession();
        Transaction tx = session.getTransaction();
        Alumno Alum = null;
        try {
            tx.begin();
            Query q = session
                    .createSQLQuery("select * from alumno where alumno.Boleta=:Bol and alumno.contrasena =:cont")
                    .addEntity(Alumno.class).setParameter("cont", cont).setParameter("Bol", Bol);
            Alum = (Alumno) q.uniqueResult();
            tx.commit();
        } catch (HibernateError he) {
            if (tx != null && tx.isActive())
                tx.rollback();
            System.out.println("Se ha cerrado la transaccion");
        }

        return Alum;
    }
}