Method getProtocol

app/src/main/java/com/sun/mail/imap/IMAPFolder.java:3799–3808

Return the IMAPProtocol object for this folder. This method will block if necessary to wait for an IDLE command to finish. @return the IMAPProtocol object used when the folder is open @exception ProtocolException for protocol errors

()

     * @exception	ProtocolException for protocol errors
     */
    protected IMAPProtocol getProtocol() throws ProtocolException {
	assert Thread.holdsLock(messageCacheLock);
	waitIfIdle();
	// if we no longer have a protocol object after waiting, it probably
	// means the connection has been closed due to a communnication error,
	// or possibly because the folder has been closed
	if (protocol == null)
	    throw new ConnectionException("Connection closed");
        return protocol;
    }

    /**
     * A simple interface for user-defined IMAP protocol commands.