public void Delete(Produto obj) throws Exception {
try {
transaction = manager.getTransaction();
transaction.begin();
manager.remove(obj);
transaction.commit();
} catch (Exception ex) {
transaction.rollback();
throw ex;
}
}
public Produto Open(int id) throws Exception {
try {
return manager.find(Produto.class, id);
} catch (Exception ex) {
throw ex;
}
}