/** * Returns existing chat rooms for the given <tt>chatRoomProvider</tt>. * * @param chatRoomProvider the <tt>ChatRoomProviderWrapper</tt>, which chat rooms we're looking * for * @return existing chat rooms for the given <tt>chatRoomProvider</tt> */ public List<String> getExistingChatRooms(ChatRoomProviderWrapper chatRoomProvider) { if (chatRoomProvider == null) return null; ProtocolProviderService protocolProvider = chatRoomProvider.getProtocolProvider(); if (protocolProvider == null) return null; OperationSetMultiUserChat groupChatOpSet = protocolProvider.getOperationSet(OperationSetMultiUserChat.class); if (groupChatOpSet == null) return null; List<String> chatRooms = null; try { chatRooms = groupChatOpSet.getExistingChatRooms(); } catch (OperationFailedException e) { if (logger.isTraceEnabled()) logger.trace( "Failed to obtain existing chat rooms for server: " + protocolProvider.getAccountID().getService(), e); } catch (OperationNotSupportedException e) { if (logger.isTraceEnabled()) logger.trace( "Failed to obtain existing chat rooms for server: " + protocolProvider.getAccountID().getService(), e); } return chatRooms; }