package cz.frantovo.nekurak.dao;

 import cz.frantovo.nekurak.dto.Podnik;

 import java.util.Collection;

 import java.util.Date;

 import javax.ejb.LocalBean;

 import javax.ejb.Stateless;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import javax.persistence.Query;

 /**

  *

  * @author fiki

  */

 @Stateless

 @LocalBean

 public class PodnikDAO {

     private static final String PU = "nekurak.net-PU";

     @PersistenceContext(unitName = PU)

     private EntityManager em;

     public Collection<Podnik> getPodniky() {

 	Query dotaz = em.createQuery("FROM " + t(Podnik.class) + " o ORDER BY datum DESC");

 	return dotaz.getResultList();

     }

     public void uloz(Podnik p) {

 	if (p.getDatum() == null) {

 	    p.setDatum(new Date());

 	}

 	em.persist(p);

     }

     private static String t(Class trida) {

 	return trida.getSimpleName();

     }

 }