private void build()

in commons-email2-jakarta/src/main/java/org/apache/commons/mail2/jakarta/HtmlEmail.java [193:275]
51 lines of code
15 McCabe index (conditional complexity)

    private void build() throws MessagingException, EmailException {
        final MimeMultipart rootContainer = getContainer();
        MimeMultipart bodyEmbedsContainer = rootContainer;
        MimeMultipart bodyContainer = rootContainer;
        MimeBodyPart msgHtml = null;
        MimeBodyPart msgText = null;

        rootContainer.setSubType("mixed");

        // determine how to form multiparts of email

        if (EmailUtils.isNotEmpty(html) && !EmailUtils.isEmpty(inlineEmbeds)) {
            // If HTML body and embeds are used, create a related container and add it to the root container
            bodyEmbedsContainer = new MimeMultipart("related");
            bodyContainer = bodyEmbedsContainer;
            addPart(bodyEmbedsContainer, 0);

            // If TEXT body was specified, create a alternative container and add it to the embeds container
            if (EmailUtils.isNotEmpty(text)) {
                bodyContainer = new MimeMultipart("alternative");
                final BodyPart bodyPart = createBodyPart();
                try {
                    bodyPart.setContent(bodyContainer);
                    bodyEmbedsContainer.addBodyPart(bodyPart, 0);
                } catch (final MessagingException e) {
                    throw new EmailException(e);
                }
            }
        } else if (EmailUtils.isNotEmpty(text) && EmailUtils.isNotEmpty(html)) {
            // EMAIL-142: if we have both an HTML and TEXT body, but no attachments or
            // inline images, the root container should have mimetype
            // "multipart/alternative".
            // reference: https://tools.ietf.org/html/rfc2046#section-5.1.4
            if (!EmailUtils.isEmpty(inlineEmbeds) || isBoolHasAttachments()) {
                // If both HTML and TEXT bodies are provided, create an alternative
                // container and add it to the root container
                bodyContainer = new MimeMultipart("alternative");
                this.addPart(bodyContainer, 0);
            } else {
                // no attachments or embedded images present, change the mimetype
                // of the root container (= body container)
                rootContainer.setSubType("alternative");
            }
        }

        if (EmailUtils.isNotEmpty(html)) {
            msgHtml = new MimeBodyPart();
            bodyContainer.addBodyPart(msgHtml, 0);

            // EMAIL-104: call explicitly setText to use default mime charset
            // (property "mail.mime.charset") in case none has been set
            msgHtml.setText(html, getCharsetName(), EmailConstants.TEXT_SUBTYPE_HTML);

            // EMAIL-147: work-around for buggy JavaMail implementations;
            // in case setText(...) does not set the correct content type,
            // use the setContent() method instead.
            final String contentType = msgHtml.getContentType();
            if (contentType == null || !contentType.equals(EmailConstants.TEXT_HTML)) {
                // apply default charset if one has been set
                if (EmailUtils.isNotEmpty(getCharsetName())) {
                    msgHtml.setContent(html, EmailConstants.TEXT_HTML + "; charset=" + getCharsetName());
                } else {
                    // unfortunately, MimeUtility.getDefaultMIMECharset() is package private
                    // and thus cannot be used to set the default system charset in case
                    // no charset has been provided by the user
                    msgHtml.setContent(html, EmailConstants.TEXT_HTML);
                }
            }

            for (final InlineImage image : inlineEmbeds.values()) {
                bodyEmbedsContainer.addBodyPart(image.getMimeBodyPart());
            }
        }

        if (EmailUtils.isNotEmpty(text)) {
            msgText = new MimeBodyPart();
            bodyContainer.addBodyPart(msgText, 0);

            // EMAIL-104: call explicitly setText to use default mime charset
            // (property "mail.mime.charset") in case none has been set
            msgText.setText(text, getCharsetName());
        }
    }