public void buildMimeMessage()

in commons-email2-jakarta/src/main/java/org/apache/commons/mail2/jakarta/Email.java [503:587]
66 lines of code
22 McCabe index (conditional complexity)

    public void buildMimeMessage() throws EmailException {
        if (message != null) {
            // [EMAIL-95] we assume that an email is not reused therefore invoking
            // buildMimeMessage() more than once is illegal.
            throw new IllegalStateException("The MimeMessage is already built.");
        }

        try {
            message = createMimeMessage(getMailSession());

            if (EmailUtils.isNotEmpty(subject)) {
                if (EmailUtils.isNotEmpty(charset)) {
                    message.setSubject(subject, charset);
                } else {
                    message.setSubject(subject);
                }
            }

            // update content type (and encoding)
            updateContentType(contentType);

            if (content != null) {
                if (EmailConstants.TEXT_PLAIN.equalsIgnoreCase(contentType) && content instanceof String) {
                    // EMAIL-104: call explicitly setText to use default mime charset
                    // (property "mail.mime.charset") in case none has been set
                    message.setText(content.toString(), charset);
                } else {
                    message.setContent(content, contentType);
                }
            } else if (emailBody != null) {
                if (contentType == null) {
                    message.setContent(emailBody);
                } else {
                    message.setContent(emailBody, contentType);
                }
            } else {
                message.setText("");
            }

            if (fromAddress != null) {
                message.setFrom(fromAddress);
            } else if (session.getProperty(EmailConstants.MAIL_SMTP_FROM) == null && session.getProperty(EmailConstants.MAIL_FROM) == null) {
                throw new EmailException("From address required");
            }

            if (toList.size() + ccList.size() + bccList.size() == 0) {
                throw new EmailException("At least one receiver address required");
            }

            if (!EmailUtils.isEmpty(toList)) {
                message.setRecipients(Message.RecipientType.TO, toInternetAddressArray(toList));
            }

            if (!EmailUtils.isEmpty(ccList)) {
                message.setRecipients(Message.RecipientType.CC, toInternetAddressArray(ccList));
            }

            if (!EmailUtils.isEmpty(bccList)) {
                message.setRecipients(Message.RecipientType.BCC, toInternetAddressArray(bccList));
            }

            if (!EmailUtils.isEmpty(replyList)) {
                message.setReplyTo(toInternetAddressArray(replyList));
            }

            if (!EmailUtils.isEmpty(headers)) {
                for (final Map.Entry<String, String> entry : headers.entrySet()) {
                    final String foldedValue = createFoldedHeaderValue(entry.getKey(), entry.getValue());
                    message.addHeader(entry.getKey(), foldedValue);
                }
            }

            if (message.getSentDate() == null) {
                message.setSentDate(getSentDate());
            }

            if (popBeforeSmtp) {
                // TODO Why is this not a Store leak? When to close?
                final Store store = session.getStore("pop3");
                store.connect(popHost, popUsername, popPassword);
            }
        } catch (final MessagingException e) {
            throw new EmailException(e);
        }
    }