private void serializeValue(final HttpServletResponse pResponse, Object value)
      throws TransformerException, IOException, FactoryConfigurationError {
    if (value instanceof Source) {
      setContentType(pResponse, "application/binary"); // Unknown content type
      Sources.writeToStream((Source) value, pResponse.getOutputStream());
    } else if (value instanceof Node) {
      pResponse.setContentType("text/xml");
      Sources.writeToStream(new DOMSource((Node) value), pResponse.getOutputStream());
    } else if (value instanceof XmlSerializable) {
      pResponse.setContentType("text/xml");
      XMLOutputFactory factory = XMLOutputFactory.newInstance();
      factory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, Boolean.TRUE);
      try {
        XmlWriter out =
            XmlStreaming.newWriter(
                pResponse.getOutputStream(), pResponse.getCharacterEncoding(), true);
        try {
          out.startDocument(null, null, null);
          ((XmlSerializable) value).serialize(out);
          out.endDocument();
        } finally {
          out.close();
        }
      } catch (XmlException e) {
        throw new TransformerException(e);
      }
    } else if (value instanceof Collection) {
      final XmlElementWrapper annotation = getElementWrapper();
      if (annotation != null) {
        setContentType(pResponse, "text/xml");
        try (OutputStream outStream = pResponse.getOutputStream()) {

          writeCollection(
              outStream, getGenericReturnType(), (Collection<?>) value, getQName(annotation));
        }
      }
    } else if (value instanceof CharSequence) {
      setContentType(pResponse, "text/plain");
      pResponse.getWriter().append((CharSequence) value);
    } else {
      if (value != null) {
        try {
          final JAXBContext jaxbContext = JAXBContext.newInstance(getReturnType());
          setContentType(pResponse, "text/xml");

          final JAXBSource jaxbSource = new JAXBSource(jaxbContext, value);
          Sources.writeToStream(jaxbSource, pResponse.getOutputStream());

        } catch (final JAXBException e) {
          throw new MessagingException(e);
        }
      }
    }
  }
 private static void saveUserListWithoutLock()
     throws TransformerConfigurationException, SAXException, IOException, SearchLibException {
   ConfigFileRotation cfr =
       configFiles.get(StartStopListener.OPENSEARCHSERVER_DATA_FILE, "users.xml");
   try {
     XmlWriter xmlWriter = new XmlWriter(cfr.getTempPrintWriter("UTF-8"), "UTF-8");
     getUserList().writeXml(xmlWriter);
     xmlWriter.endDocument();
     cfr.rotate();
   } finally {
     cfr.abort();
   }
 }