Adding DTD info to xml using DOM

Question

I am using DOM to create an XML file and using StAX to parse another xml to get data selectively to write.

I am stuck at a point where I have the DTD event from Stax but i dont know how to write it to DOM document.

Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();

while (r.hasNext()) {
            int eventType = r.next();

            Node child;

            switch (eventType) {
            case XMLStreamConstants.CDATA:
                child = doc.createCDATASection(r.getText());
                break;
            case XMLStreamConstants.DTD:
            //??? - what shoould come here?
            break;

r is XMLEventReader object

Answer 1

Found the answer finally.

Doctype is added when transforming the file.

 Transformer tFormer = 
  TransformerFactory.newInstance().newTransformer();
//  Set system id
  tFormer.setOutputProperty(
  OutputKeys.DOCTYPE_SYSTEM, "systmId");

  Source source = new DOMSource(doc);
  Result result = new StreamResult(System.out);
  tFormer.transform(source, result);