final SAXAdapter adapter = new SAXAdapter(context);
try {
adapter.startDocument();
index.toSAX(adapter);
adapter.endDocument();
} catch (final SAXException e) {
throw new XPathException(this, "Error caught while retrieving statistics: " + e.getMessage(), e);
}
final DocumentImpl doc = (DocumentImpl) adapter.getDocument();
return (NodeImpl) doc.getFirstChild();