protected boolean protocolConnect()

in geronimo-javamail_1.3.1/geronimo-javamail_1.3.1_provider/src/main/java/org/apache/geronimo/javamail/transport/smtp/SMTPTransport.java [345:414]
41 lines of code
14 McCabe index (conditional complexity)

    protected boolean protocolConnect(String host, int port, String username, String password)
            throws MessagingException {

        // first check to see if we need to authenticate. If we need this, then
        // we must have a username and
        // password specified. Failing this may result in a user prompt to
        // collect the information.
        boolean mustAuthenticate = isProtocolPropertyTrue(MAIL_SMTP_AUTH);

        // if we need to authenticate, and we don't have both a userid and
        // password, then we fail this
        // immediately. The Service.connect() method will try to obtain the user
        // information and retry the
        // connection one time.
        if (mustAuthenticate && (username == null || password == null)) {
            return false;
        }
        
        
    	// Before we do anything, let's make sure that we succesfully received a host
    	if ( host == null ) {
    		host = DEFAULT_MAIL_HOST;
    	}

        // if the port is defaulted, then see if we have something configured in
        // the session.
        // if not configured, we just use the default default.
        if (port == -1) {
            // take the default first.
            port = defaultPort;
            String configuredPort = getProtocolProperty(MAIL_SMTP_PORT);
            if (configuredPort != null) {
                port = Integer.parseInt(configuredPort);
            }
        }
        
        if (debug) {
            debugOut("Connecting to server " + host + ":" + port + " for user " + username);
        }

        try {

            // create socket and connect to server.
            getConnection(host, port, username, password);

            // receive welcoming message
            if (!getWelcome()) {
                throw new MessagingException("Error in getting welcome msg");
            }

            // say hello
            if (!sendHandshake()) {
                throw new MessagingException("Error in saying EHLO to server");
            }

            // authenticate with the server, if necessary
            if (!processAuthentication()) {
                if (debug) {
                    debugOut("User authentication failure");
                }
                throw new AuthenticationFailedException("Error authenticating with server");
            }
        } catch (IOException e) {
            if (debug) {
                debugOut("I/O exception establishing connection", e);
            }
            throw new MessagingException("Connection error", e);
        }
        return true;
    }