/**
   * {@inheritDoc}
   *
   * @see org.xwiki.observation.EventListener#onEvent(org.xwiki.observation.event.Event,
   *     java.lang.Object, java.lang.Object)
   */
  public void onEvent(Event event, Object source, Object data) {
    // Only take into account local events
    if (!Utils.getComponent(RemoteObservationManagerContext.class).isRemoteState()) {
      XWikiDocument document = ((XWikiDocument) source).getOriginalDocument();
      XWikiContext context = (XWikiContext) data;

      String userOrGroupWiki = document.getDatabase();
      String userOrGroupSpace = document.getSpace();
      String userOrGroupName = document.getName();

      if (document.getObject("XWiki.XWikiUsers") != null) {
        try {
          cleanDeletedUserOrGroup(
              userOrGroupWiki, userOrGroupSpace, userOrGroupName, true, context);
        } catch (XWikiException e) {
          LOG.warn("Error when cleaning for deleted user", e);
        }
      } else if (document.getObject("XWiki.XWikiGroups") != null) {
        try {
          cleanDeletedUserOrGroup(
              userOrGroupWiki, userOrGroupSpace, userOrGroupName, false, context);
        } catch (XWikiException e) {
          LOG.warn("Error when cleaning for deleted group", e);
        }
      }
    }
  }
 /**
  * Generate page name from the container page We add Rating and getUniquePageName will add us a
  * counter to our page
  */
 private String getPageName(String documentName) throws XWikiException {
   XWikiDocument doc = context.getWiki().getDocument(documentName, context);
   String ratingsSpace = ratingsManager.getRatingsSpaceName();
   boolean hasRatingsSpaceForeachSpace = ratingsManager.hasRatingsSpaceForeachSpace();
   if (hasRatingsSpaceForeachSpace) {
     return doc.getSpace()
         + ratingsSpace
         + "."
         + getUniquePageName(ratingsSpace, doc.getName(), "R", true);
   } else if (ratingsSpace == null) {
     return doc.getSpace()
         + "."
         + getUniquePageName(doc.getSpace(), doc.getName() + "R", "", true);
   } else {
     return ratingsSpace
         + "."
         + getUniquePageName(ratingsSpace, doc.getSpace() + "_" + doc.getName(), "R", true);
   }
 }