public void downloadProductInterface(@Valid DownloadProductInterfaceDTO interfaceDTO,
@SuppressWarnings("unused") BindingResult bindingResult, HttpServletResponse response) throws IOException {


    log.debug("name is {}, library is {}", interfaceDTO.getName(), interfaceDTO.getLibrary());
@SuppressWarnings
 
("unchecked")
    Map<String, Object> map = BeanToMapUtils.toMap(interfaceDTO);
ServiceReturn<DataProduct> serviceReturn = dataProductService.find(map);
ByteArrayOutputStream tmp = new ByteArrayOutputStream();
tmp.write(serviceReturn.getBody().getData().getBytes());
response.setHeader("Content-Disposition"
 
, "attachment; filename=" + serviceReturn.getBody().getLibrary() +
            "_" + serviceReturn.getBody().getName() + ".json");
Integer contentLength = tmp.size();
response.setHeader("content-length", contentLength + "");
response.getOutputStream().write(tmp.toByteArray());
}