cr.setUrl(info.newReadMetadataUrl(sourceUri));
XmlHandler sh = new XmlHandler(false);
cr.setContentHandler(sh);
cr.setCredentialProvider(info.newCredentialProvider());
cr.setBatchHttpClient(info.getBatchHttpClient());
cr.execute();
Document doc = sh.getDocument();
XPath xPath = XPathFactory.newInstance().newXPath();
Node node = (Node) xPath.evaluate(
"/OAI-PMH/GetRecord/record/metadata",
doc, XPathConstants.NODE);