public static InternetAddress getLocalAddress()

in geronimo-mail_2.1_spec/src/main/java/jakarta/mail/internet/InternetAddress.java [392:440]
31 lines of code
11 McCabe index (conditional complexity)

    public static InternetAddress getLocalAddress(final Session session) {
        String host = null;
        String user = null;

        // ok, we have several steps for resolving this.  To start with, we could have a from address
        // configured already, which will be a full InternetAddress string.  If we don't have that, then
        // we need to resolve a user and host to compose an address from.
        if (session != null) {
            final String address = session.getProperty("mail.from");
            // if we got this, we can skip out now
            if (address != null) {
                try {
                    return new InternetAddress(address);
                } catch (final AddressException e) {
                    // invalid address on the from...treat this as an error and return null.
                    return null;
                }
            }

            // now try for user and host information.  We have both session and system properties to check here.
            // we'll just handle the session ones here, and check the system ones below if we're missing information.
            user = session.getProperty("mail.user");
            host = session.getProperty("mail.host");
        }

        try {

            // if either user or host is null, then we check non-session sources for the information.
            if (user == null) {
                user = System.getProperty("user.name");
            }

            if (host == null) {
                host = InetAddress.getLocalHost().getHostName();
            }

            if (user != null && host != null) {
                // if we have both a user and host, we can create a local address
                return new InternetAddress(user + '@' + host);
            }
        } catch (final AddressException e) {
            // ignore
        } catch (final UnknownHostException e) {
            // ignore
        } catch (final SecurityException e) {
            // ignore
        }
        return null;
    }