Examples of org.rssowl.core.persist.event.NewsEvent

org.rssowl.core.persist.event.NewsEvent

An Event-Object being used to notify Listeners, whenever the type INews was added, updated or deleted in the persistance layer.
In order to retrieve the Model-Object that is affected on the Event, use the resolve() Method of the ModelReference stored in this Event. @author bpasero

   * given Events, <code>FALSE</code> otherwise.
   */
  public static boolean isNewOrReadStateChange(Set<? extends ModelEvent> events) {
    for (ModelEvent event : events) {
      if (event instanceof NewsEvent) {
        NewsEvent newsEvent = (NewsEvent) event;


        boolean oldStateNew = INews.State.NEW.equals(newsEvent.getOldNews() != null ? newsEvent.getOldNews().getState() : null);
        boolean currentStateNew = INews.State.NEW.equals(newsEvent.getEntity().getState());


        if (oldStateNew != currentStateNew)
          return true;


        boolean oldStateUnread = isUnread(newsEvent.getOldNews() != null ? newsEvent.getOldNews().getState() : null);
        boolean newStateUnread = isUnread(newsEvent.getEntity().getState());


        if (oldStateUnread != newStateUnread)
          return true;
      }
    }

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   * Events, <code>FALSE</code> otherwise.
   */
  public static boolean isStateChange(Set<? extends ModelEvent> events) {
    for (ModelEvent event : events) {
      if (event instanceof NewsEvent) {
        NewsEvent newsEvent = (NewsEvent) event;
        INews.State oldState = newsEvent.getOldNews() != null ? newsEvent.getOldNews().getState() : null;
        if (oldState != newsEvent.getEntity().getState())
          return true;
      }
    }


    return false;

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   * <code>FALSE</code> otherwise.
   */
  public static boolean gotDeleted(Set<? extends ModelEvent> events) {
    for (ModelEvent event : events) {
      if (event instanceof NewsEvent) {
        NewsEvent newsEvent = (NewsEvent) event;


        boolean isVisible = newsEvent.getEntity().isVisible();
        boolean wasVisible = newsEvent.getOldNews() != null ? newsEvent.getOldNews().isVisible() : false;


        if (!isVisible && wasVisible)
          return true;
      }
    }

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   * in the Publish-Date of the News, <code>FALSE</code> otherwise.
   */
  public static boolean isDateChange(Set<? extends ModelEvent> events) {
    for (ModelEvent modelEvent : events) {
      if (modelEvent instanceof NewsEvent) {
        NewsEvent event = (NewsEvent) modelEvent;


        Date oldDate = event.getOldNews() != null ? DateUtils.getRecentDate(event.getOldNews()) : null;
        Date newDate = DateUtils.getRecentDate(event.getEntity());


        if (!newDate.equals(oldDate))
          return true;
      }
    }

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   * in the Author of the News, <code>FALSE</code> otherwise.
   */
  public static boolean isAuthorChange(Set<? extends ModelEvent> events) {
    for (ModelEvent modelEvent : events) {
      if (modelEvent instanceof NewsEvent) {
        NewsEvent event = (NewsEvent) modelEvent;


        IPerson oldAuthor = event.getOldNews() != null ? event.getOldNews().getAuthor() : null;
        IPerson newAuthor = event.getEntity().getAuthor();


        if (newAuthor != null && !newAuthor.equals(oldAuthor))
          return true;
        else if (oldAuthor != null && !oldAuthor.equals(newAuthor))
          return true;

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   * in the Category of the News, <code>FALSE</code> otherwise.
   */
  public static boolean isCategoryChange(Set<? extends ModelEvent> events) {
    for (ModelEvent modelEvent : events) {
      if (modelEvent instanceof NewsEvent) {
        NewsEvent event = (NewsEvent) modelEvent;


        List<ICategory> oldCategories = event.getOldNews() != null ? event.getOldNews().getCategories() : null;
        List<ICategory> newCategories = event.getEntity().getCategories();


        if (!newCategories.equals(oldCategories))
          return true;
      }
    }

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   * in the Label of the News, <code>FALSE</code> otherwise.
   */
  public static boolean isLabelChange(Set<? extends ModelEvent> events) {
    for (ModelEvent modelEvent : events) {
      if (modelEvent instanceof NewsEvent) {
        NewsEvent event = (NewsEvent) modelEvent;


        Set<ILabel> oldLabels = event.getOldNews() != null ? event.getOldNews().getLabels() : null;
        Set<ILabel> newLabels = event.getEntity().getLabels();


        if (!newLabels.equals(oldLabels))
          return true;
      }
    }

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  }


  public static final void saveNews(ObjectContainer db, INews news) {
    INews oldNews = db.ext().peekPersisted(news, 2, true);
    if (oldNews != null) {
      ModelEvent newsEventTemplate = new NewsEvent(oldNews, news, false);
      DBHelper.putEventTemplate(newsEventTemplate);
    }
    db.ext().set(news, 2);
  }

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  }


  public static final void saveAndCascadeNews(ObjectContainer db, INews news, boolean root) {
    INews oldNews = db.ext().peekPersisted(news, 2, true);
    if (oldNews != null || root) {
      ModelEvent event = new NewsEvent(oldNews, news, root);
      putEventTemplate(event);
    }
    saveEntities(db, news.getCategories());
    saveEntity(db, news.getAuthor());
    saveEntities(db, news.getAttachments());

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    unreadNews2.setState(INews.State.UNREAD);


    INews hiddenNews2 = fFactory.createNews(7L, feed, new Date());
    hiddenNews2.setState(INews.State.HIDDEN);


    NewsEvent event1 = new NewsEvent(newNews, newNews, true);
    NewsEvent event2 = new NewsEvent(newNews, unreadNews, true);
    NewsEvent event3 = new NewsEvent(newNews, readNews, true);
    NewsEvent event4 = new NewsEvent(unreadNews, readNews2, true);
    NewsEvent event5 = new NewsEvent(unreadNews, unreadNews2, true);
    NewsEvent event6 = new NewsEvent(hiddenNews, hiddenNews, true);
    NewsEvent event7 = new NewsEvent(newNews, hiddenNews2, true);
    NewsEvent event8 = new NewsEvent(newNews, deletedNews, true);


    events.add(event1);
    assertEquals(false, ModelUtils.isNewStateChange(events));
    events.add(event4);
    assertEquals(false, ModelUtils.isNewStateChange(events));

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