/** extracts XML from PDF */
protected byte[] getXMLFromPDF(PdfReader reader) throws Exception {
XfaForm xfaForm = reader.getAcroFields().getXfa();
Node domDocument = xfaForm.getDomDocument();
if (domDocument == null) return null;
Element documentElement = ((Document) domDocument).getDocumentElement();
Element datasetsElement =
(Element) documentElement.getElementsByTagNameNS(XFA_NS, "datasets").item(0);
Element dataElement = (Element) datasetsElement.getElementsByTagNameNS(XFA_NS, "data").item(0);
Element xmlElement = (Element) dataElement.getChildNodes().item(0);
Node budgetElement = getBudgetElement(xmlElement);
byte[] serializedXML = XfaForm.serializeDoc(budgetElement);
return serializedXML;
}
