private String fromException()

in server/mailet/mailets/src/main/java/org/apache/james/transport/mailets/remote/delivery/MessageComposer.java [49:103]
47 lines of code
15 McCabe index (conditional complexity)

    private String fromException(Exception e) {
        if (e.getClass().getName().endsWith(".SMTPSendFailedException")) {
            return "RemoteHost said: " + e.getMessage();
        } else if (e instanceof SendFailedException) {
            SendFailedException exception = (SendFailedException) e;

            // No error
            if (exception.getInvalidAddresses().length == 0 && exception.getValidUnsentAddresses().length == 0) {
                return null;
            }

            Exception ex;
            StringBuilder sb = new StringBuilder();
            boolean smtpExFound = false;
            sb.append("RemoteHost said:");

            if (e instanceof MessagingException) {
                while ((ex = ((MessagingException) e).getNextException()) != null && ex instanceof MessagingException) {
                    e = ex;
                    if (ex.getClass().getName().endsWith(".SMTPAddressFailedException")) {
                        try {
                            InternetAddress ia = (InternetAddress) invokeGetter(ex, "getAddress");
                            sb.append(" ( ").append(ia).append(" - [").append(ex.getMessage().replace("\\n", "")).append("] )");
                            smtpExFound = true;
                        } catch (IllegalStateException ise) {
                            // Error invoking the getAddress method
                        } catch (ClassCastException cce) {
                            // The getAddress method returned something
                            // different than InternetAddress
                        }
                    }
                }
            }
            if (!smtpExFound) {
                boolean invalidAddr = false;
                sb.append(" ( ");

                if (exception.getInvalidAddresses().length > 0) {
                    sb.append(Arrays.toString(exception.getInvalidAddresses()));
                    invalidAddr = true;
                }
                if (exception.getValidUnsentAddresses().length > 0) {
                    if (invalidAddr) {
                        sb.append(" ");
                    }
                    sb.append(Arrays.toString(exception.getValidUnsentAddresses()));
                }
                sb.append(" - [");
                sb.append(exception.getMessage().replace("\\n", ""));
                sb.append("] )");
            }
            return sb.toString();
        }
        return null;
    }