/**
   * Updates contact source contacts with status.
   *
   * @param evt the ContactPresenceStatusChangeEvent describing the status
   */
  @Override
  public void contactPresenceStatusChanged(ContactPresenceStatusChangeEvent evt) {
    if (recentQuery == null) return;

    synchronized (recentMessages) {
      for (ComparableEvtObj msg : recentMessages) {
        if (msg.getContact() != null && msg.getContact().equals(evt.getSourceContact())) {
          recentQuery.updateContactStatus(msg, evt.getNewStatus());
        }
      }
    }
  }
 /**
  * Indicates that a MetaContact has been modified.
  *
  * @param evt the MetaContactListEvent containing the corresponding contact
  */
 public void metaContactRenamed(MetaContactRenamedEvent evt) {
   for (ComparableEvtObj msc : recentMessages) {
     if (evt.getSourceMetaContact().containsContact(msc.getContact())) {
       if (recentQuery != null) recentQuery.updateContactDisplayName(msc, evt.getNewDisplayName());
     }
   }
 }
  @Override
  public void supportedOperationSetsChanged(ContactCapabilitiesEvent event) {
    Contact contact = event.getSourceContact();

    if (contact == null) return;

    for (ComparableEvtObj msc : recentMessages) {
      if (contact.equals(msc.getContact())) {
        if (recentQuery != null) recentQuery.updateCapabilities(msc, contact);

        return;
      }
    }
  }
  /**
   * If a contact is renamed update the locally stored message if any.
   *
   * @param evt the <tt>ContactPropertyChangeEvent</tt> containing the source
   */
  @Override
  public void contactModified(ContactPropertyChangeEvent evt) {
    if (!evt.getPropertyName().equals(ContactPropertyChangeEvent.PROPERTY_DISPLAY_NAME)) return;

    Contact contact = evt.getSourceContact();

    if (contact == null) return;

    for (ComparableEvtObj msc : recentMessages) {
      if (contact.equals(msc.getContact())) {
        if (recentQuery != null)
          recentQuery.updateContactDisplayName(msc, contact.getDisplayName());

        return;
      }
    }
  }
  /**
   * Tries to match the event object to already existing ComparableEvtObj in the supplied list.
   *
   * @param obj the object that we will try to match.
   * @param list the list we will search in.
   * @return the found ComparableEvtObj
   */
  private static ComparableEvtObj findRecentMessage(EventObject obj, List<ComparableEvtObj> list) {
    Contact contact = null;
    ChatRoom chatRoom = null;

    if (obj instanceof MessageDeliveredEvent) {
      contact = ((MessageDeliveredEvent) obj).getDestinationContact();
    } else if (obj instanceof MessageReceivedEvent) {
      contact = ((MessageReceivedEvent) obj).getSourceContact();
    } else if (obj instanceof ChatRoomMessageDeliveredEvent) {
      chatRoom = ((ChatRoomMessageDeliveredEvent) obj).getSourceChatRoom();
    } else if (obj instanceof ChatRoomMessageReceivedEvent) {
      chatRoom = ((ChatRoomMessageReceivedEvent) obj).getSourceChatRoom();
    }

    for (ComparableEvtObj evt : list) {
      if ((contact != null && contact.equals(evt.getContact()))
          || (chatRoom != null && chatRoom.equals(evt.getRoom()))) return evt;
    }

    return null;
  }