public InputStream serialize()

in src/main/java/com/aliyun/mns/model/serialize/topic/TopicMessageSerializer.java [70:156]
73 lines of code
18 McCabe index (conditional complexity)

    public InputStream serialize(PublishMessageRequest request, String encoding) throws Exception {
        Document doc = getDocumentBuilder().newDocument();

        TopicMessage msg = request.getMessage();
        Element root = doc.createElementNS(DEFAULT_XML_NAMESPACE, MESSAGE_TAG);
        doc.appendChild(root);

        Element node = safeCreateContentElement(doc, MESSAGE_BODY_TAG,
            msg.getOriginalMessageBody(), "");
        if (node != null) {
            root.appendChild(node);
        }

        node = safeCreateContentElement(doc, MESSAGE_TAG_TAG, msg.getMessageTag(), null);
        if (node != null) {
            root.appendChild(node);
        }

        MessageAttributes messageAttributes = request.getMessageAttributes();
        if (messageAttributes != null) {
            Element attributesNode = doc.createElement(MESSAGE_ATTRIBUTES_TAG);
            root.appendChild(attributesNode);

            if (messageAttributes.getMailAttributes() != null) {
                node = safeCreateContentElement(doc, DIRECT_MAIL_TAG,
                    messageAttributes.getMailAttributes().toJson(getGson()), null);
                if (node != null) {
                    attributesNode.appendChild(node);
                }
            }

            if (messageAttributes.getDayuAttributes() != null) {
                node = safeCreateContentElement(doc, DAYU_TAG, messageAttributes.getDayuAttributes().toJson(getGson()),
                    null);
                if (node != null) {
                    attributesNode.appendChild(node);
                }
            }

            if (messageAttributes.getSmsAttributes() != null) {
                node = safeCreateContentElement(doc, SMS_TAG, messageAttributes.getSmsAttributes().toJson(getGson()),
                    null);
                if (node != null) {
                    attributesNode.appendChild(node);
                }
            }

            if (messageAttributes.getBatchSmsAttributes() != null) {
                node = safeCreateContentElement(doc, SMS_TAG,
                    messageAttributes.getBatchSmsAttributes().toJson(getGson()), null);
                if (node != null) {
                    attributesNode.appendChild(node);
                }
            }

            if (messageAttributes.getWebSocketAttributes() != null) {
                node = safeCreateContentElement(doc, WEBSOCKET_TAG,
                    messageAttributes.getWebSocketAttributes().toJson(getGson()), null);
                if (node != null) {
                    attributesNode.appendChild(node);
                }
            }

            if (messageAttributes.getPushAttributes() != null) {
                node = safeCreateContentElement(doc, PUSH_TAG, messageAttributes.getPushAttributes().toJson(getGson()),
                    null);
                if (node != null) {
                    attributesNode.appendChild(node);
                }
            }
        }

        node = safeCreatePropertiesNode(doc, msg.getUserProperties(), USER_PROPERTIES_TAG, MESSAGE_PROPERTY_TAG);
        if (node != null) {
            root.appendChild(node);
        }

        node = safeCreatePropertiesNode(doc, msg.getSystemProperties(), SYSTEM_PROPERTIES_TAG,
            MESSAGE_SYSTEM_PROPERTY_TAG);
        if (node != null) {
            root.appendChild(node);
        }

        String xml = XmlUtil.xmlNodeToString(doc, encoding);

        return new ByteArrayInputStream(xml.getBytes(encoding));
    }