/** * Fetches and sets the message flags for the supplied messages. The idea is to have this be * recursive so that we do a series of medium calls instead of one large massive call or a large * number of smaller calls. */ private void fetchFlags( List<WebDavMessage> startMessages, MessageRetrievalListener<WebDavMessage> listener) throws MessagingException { HashMap<String, String> headers = new HashMap<String, String>(); String messageBody; List<Message> messages = new ArrayList<Message>(20); String[] uids; if (startMessages == null || startMessages.isEmpty()) { return; } if (startMessages.size() > 20) { List<WebDavMessage> newMessages = new ArrayList<WebDavMessage>(startMessages.size() - 20); for (int i = 0, count = startMessages.size(); i < count; i++) { if (i < 20) { messages.add(startMessages.get(i)); } else { newMessages.add(startMessages.get(i)); } } fetchFlags(newMessages, listener); } else { messages.addAll(startMessages); } uids = new String[messages.size()]; for (int i = 0, count = messages.size(); i < count; i++) { uids[i] = messages.get(i).getUid(); } messageBody = store.getMessageFlagsXml(uids); headers.put("Brief", "t"); DataSet dataset = store.processRequest(this.mFolderUrl, "SEARCH", messageBody, headers); if (dataset == null) { throw new MessagingException("Data Set from request was null"); } Map<String, Boolean> uidToReadStatus = dataset.getUidToRead(); for (int i = 0, count = messages.size(); i < count; i++) { if (!(messages.get(i) instanceof WebDavMessage)) { throw new MessagingException("WebDavStore fetch called with non-WebDavMessage"); } WebDavMessage wdMessage = (WebDavMessage) messages.get(i); try { wdMessage.setFlagInternal(Flag.SEEN, uidToReadStatus.get(wdMessage.getUid())); } catch (NullPointerException e) { Log.v( LOG_TAG, "Under some weird circumstances, setting the read status when syncing from webdav threw an NPE. Skipping."); } } }