Java Utililty Methods XML Document Clone

Document d;
try {
    d = newBuilder().newDocument();
} catch (ParserConfigurationException e) {
    throw new IOException("Cannot clone document");
Node n = d.importNode(doc.getDocumentElement(), true);
d.appendChild(n);
...

Document rtnVal = (Document) inDoc.cloneNode(true);
return (rtnVal);

node = node.cloneNode(true);
document.adoptNode(node);
document.appendChild(node);

if (document == null)
    return null;
Document result = newDocument();
try {
    identityTransformer.transform(new DOMSource(document), new DOMResult(result));
} catch (TransformerException e) {
    e.printStackTrace();
return result;

final Node rootNode = doc.getDocumentElement();
final TransformerFactory tfactory = TransformerFactory.newInstance();
final Transformer tx = tfactory.newTransformer();
final DOMSource source = new DOMSource(doc);
final DOMResult result = new DOMResult();
tx.transform(source, result);
final Document copy = (Document) result.getNode();
copy.removeChild(copy.getDocumentElement());
...

if (doc == null) {
    throw new IllegalArgumentException("The document source cannot be null.");
return (Document) doc.cloneNode(true);

final Transformer transformer = sTransformerFactory.newTransformer();
final DOMSource srcDom = new DOMSource(src);
final DOMResult resultDom = new DOMResult();
transformer.transform(srcDom, resultDom);
return (Document) resultDom.getNode();

Node clone = null;
if (node != null) {
    switch (node.getNodeType()) {
    case Node.ELEMENT_NODE:
        clone = document.createElement(node.getNodeName());
        NamedNodeMap attrs = node.getAttributes();
        int nattrs = (attrs == null ? 0 : attrs.getLength());
        for (int a = 0; a < nattrs; a++) {
...

Node r = null;
switch (n.getNodeType()) {
case Node.TEXT_NODE:
    r = d.createTextNode(((Text) n).getData());
    break;
case Node.CDATA_SECTION_NODE:
    r = d.createCDATASection(((CDATASection) n).getData());
    break;
...

if (document == null || node == null) {
    return null;
int type = node.getNodeType();
if (node.getOwnerDocument() == document) {
    return node.cloneNode(deep);
Node clone;
...