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

      /*
       * Optimization: If more than a single news is to update, check
       * if the Browser only shows a single news to avoid a full refresh.
       */
      if (events.size() > 1) {
        NewsEvent event = findShowingEventFromBrowser(events);
        if (event != null)
          newsToUpdate = Collections.singleton(event);
      }


      fBrowserViewer.update(newsToUpdate);

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          /*
           * Optimization: If more than a single news is to update, check
           * if the Browser only shows a single news to avoid a full refresh.
           */
          if (events.size() > 1) {
            NewsEvent event = findShowingEventFromBrowser(events);
            if (event != null)
              newsToUpdate = Collections.singleton(event);
          }


          fBrowserViewer.update(newsToUpdate);

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      /*
       * Optimization: If more than a single news is to update, check
       * if the Browser only shows a single news to avoid a full refresh.
       */
      if (visibleEvents.size() > 1) {
        NewsEvent event = findShowingEventFromBrowser(visibleEvents);
        if (event != null)
          newsToUpdate = Collections.singleton(event);
      }


      fBrowserViewer.update(newsToUpdate);

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    //Not sure about this, but let's do it for now to help us track a bug
    //in NewsService where never having a newsUpdated with a null oldNews is helpful
    INews news = entity.getNews();
    INews oldNews = fDb.ext().peekPersisted(news, 2, true);
    NewsEvent newsEvent = new NewsEvent(oldNews, news, false);
    DBHelper.putEventTemplate(newsEvent);


    super.doDelete(entity);
  }

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   * its value for any of the given Events, <code>FALSE</code> otherwise.
   */
  public static boolean isNewStateChange(Collection<? 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;
      }
    }

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   * field have changed to NEW, UNREAD or UPDATED from the READ state.
   */
  public static boolean changedFromReadToUnread(Collection<? extends ModelEvent> events) {
    for (ModelEvent event : events) {
      if (event instanceof NewsEvent) {
        NewsEvent newsEvent = (NewsEvent) event;
        boolean oldStateRead = INews.State.READ.equals(newsEvent.getOldNews() != null ? newsEvent.getOldNews().getState() : null);
        State currentState = newsEvent.getEntity().getState();
        boolean currentStateNewUnreadUpdated = INews.State.NEW.equals(currentState) || INews.State.UNREAD.equals(currentState) || INews.State.UPDATED.equals(currentState);


        if (oldStateRead && currentStateNewUnreadUpdated)
          return true;
      }

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   * otherwise. Respects the onlyHasBecomeSticky parameter.
   */
  public static boolean isStickyStateChange(Collection<? extends ModelEvent> events, boolean onlyHasBecomeSticky) {
    for (ModelEvent event : events) {
      if (event instanceof NewsEvent) {
        NewsEvent newsEvent = (NewsEvent) event;
        boolean oldSticky = (newsEvent.getOldNews() != null) ? newsEvent.getOldNews().isFlagged() : false;
        boolean currentSticky = newsEvent.getEntity().isVisible() && newsEvent.getEntity().isFlagged();


        /* Only return true if sticky state is now TRUE */
        if (onlyHasBecomeSticky) {
          if (!oldSticky && currentSticky)
            return true;

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   * onlyHasBecomeUnread parameter.
   */
  public static boolean isReadStateChange(Collection<? extends ModelEvent> events, boolean onlyHasBecomeUnread) {
    for (ModelEvent event : events) {
      if (event instanceof NewsEvent) {
        NewsEvent newsEvent = (NewsEvent) event;
        boolean oldStateUnread = isUnread(newsEvent.getOldNews() != null ? newsEvent.getOldNews().getState() : null);
        boolean newStateUnread = isUnread(newsEvent.getEntity().getState());


        /* Only return true if unread state is now TRUE */
        if (onlyHasBecomeUnread) {
          if (!oldStateUnread && newStateUnread)
            return true;

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   * Events, <code>FALSE</code> otherwise.
   */
  public static boolean isNewOrReadStateChange(Collection<? 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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   * @see org.rssowl.core.internal.persist.dao.AbstractEntityDAO#
   * createDeleteEventTemplate(org.rssowl.core.persist.IEntity)
   */
  @Override
  protected final NewsEvent createDeleteEventTemplate(INews entity) {
    return new NewsEvent(null, entity, true);
  }

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