public class Marshal {
public static void main(String[] args) throws Exception {
KeyInfoFactory fac = KeyInfoFactory.getInstance();
KeyInfo ki = fac.newKeyInfo
(Collections.singletonList(fac.newKeyName("foo")), "keyid");
try {
ki.marshal(null, null);
throw new Exception("Should raise a NullPointerException");
} catch (NullPointerException npe) {}
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
Document doc = dbf.newDocumentBuilder().newDocument();
Element elem = doc.createElementNS("http://acme.org", "parent");
doc.appendChild(elem);
DOMStructure parent = new DOMStructure(elem);
ki.marshal(parent, null);
Element kiElem = DOMUtils.getFirstChildElement(elem);
if (!kiElem.getLocalName().equals("KeyInfo")) {
throw new Exception
("Should be KeyInfo element: " + kiElem.getLocalName());