Method open

app/src/main/java/com/sun/mail/pop3/POP3Folder.java:189–228

Throws FolderNotFoundException unless this folder is named "INBOX". @exception FolderNotFoundException if not INBOX @exception AuthenticationFailedException authentication failures @exception MessagingException other open failures

(int mode)

     * @exception	MessagingException	other open failures
     */
    @Override
    public synchronized void open(int mode) throws MessagingException {
	checkClosed();
	if (!exists)
	    throw new FolderNotFoundException(this, "folder is not INBOX");

	try {
	    port = store.getPort(this);
	    Status s = port.stat();
	    total = s.total;
	    size = s.size;
	    this.mode = mode;
	    if (store.useFileCache) {
		try {
		    fileCache = new TempFile(store.fileCacheDir);
		} catch (IOException ex) {
		    logger.log(Level.FINE, "failed to create file cache", ex);
		    throw ex;	// caught below
		}
	    }
	    opened = true;
	} catch (IOException ioex) {
	    try {
		if (port != null)
		    port.quit();
	    } catch (IOException ioex2) {
		// ignore
	    } finally {
		port = null;
		store.closePort(this);
	    }
	    throw new MessagingException("Open failed", ioex);
	}

	// Create the message cache array of appropriate size
	message_cache = new POP3Message[total];
	doneUidl = false;

	notifyConnectionListeners(ConnectionEvent.OPENED);
    }

    @Override
    public synchronized void close(boolean expunge) throws MessagingException {