if (format.equalsIgnoreCase("xml")) {
response.setContentType("text/xml; charset=UTF-8");
writer = new XmlResultSetWriter(responseWriter);
} else {
response.setContentType("text/plain; charset=UTF-8");
writer = new JsonResultSetWriter(responseWriter);
}
if (!callback.isEmpty()) {
responseWriter.print(callback+"({");
responseWriter.flush();
}