if (feed.getId() == null) {
        Query query = em.createQuery("SELECT f FROM Feed f WHERE f.fLink = :url");
        query.setParameter("url", new URLEntity(feed.getLink()));
        List<IFeed> feeds = query.getResultList();
        if (feeds.size() > 0) {
          IFeed managedFeed = feeds.get(0);
          
//          List<INews> newsToDelete = new ArrayList<INews>(managedFeed.getNews());
//          for (INews newsItem : newsToDelete) {
//            managedFeed.removeNews(newsItem);
//          }
//          for (INews newsItem : feed.getNews()) {
//            managedFeed.addNews(newsItem);
//          }

        }
      }