@Override
public void update(Article article) {
Article a1 = em.find(Article.class, article.getReference());
a1.setPrix(article.getPrix());
a1.setQuantite(article.getQuantite());
a1.setTva(article.getTva());
a1.setLibelle(article.getLibelle());
em.persist(a1);
}
@Override
public void delete(Article article) {
if (em.find(Article.class, article.getReference()) != null)
em.remove(em.find(Article.class, article.getReference()));
}