Source:
public void upload(@Observes ControllerFound event, MutableRequest request, MultipartConfig config, Validator validator) { if (!ServletFileUpload.isMultipartContent(request)) { return; } logger.info("Request contains multipart data. Try to parse with commons-upload."); final Multiset<String> indexes = HashMultiset.create(); final Multimap<String, String> params = LinkedListMultimap.create(); ServletFileUpload uploader = createServletFileUpload(config); UploadSizeLimit uploadSizeLimit = event.getMethod().getAnnotation(UploadSizeLimit.class); uploader.setSizeMax(uploadSizeLimit != null ? uploadSizeLimit.sizeLimit() : config.getSizeLimit()); uploader.setFileSizeMax(uploadSizeLimit != null ? uploadSizeLimit.fileSizeLimit() : config.getFileSizeLimit()); logger.debug("Setting file sizes: total={}, file={}", uploader.getSizeMax(), uploader.getFileSizeMax()); try { final List<FileItem> items = uploader.parseRequest(request); logger.debug("Found attributes in the multipart form submission. Parsing them.", items.size()); for (FileItem item : items) { String name = item.getFieldName(); name = fixIndexedParameters(name, indexes); if (item.isFormField()) { logger.debug("{} is a field", name); params.put(name, getValue(item, request)); } else if (isNotEmpty(item)) { logger.debug("{} is a file", name); processFile(item, name, request); } else { logger.debug("A file field is empty: {}", item.getFieldName()); } } for (String paramName : params.keySet()) { Collection<String> paramValues = params.get(paramName); request.setParameter(paramName, paramValues.toArray(new String[paramValues.size()])); } } catch (final SizeLimitExceededException e) { reportSizeLimitExceeded(e, validator); } catch (FileUploadException e) { reportFileUploadException(e, validator); } }

Target:
public void upload(@Observes ControllerFound event, MutableRequest request, MultipartConfig config, Validator validator) { if (!ServletFileUpload.isMultipartContent(request)) { return; } logger.info("Request contains multipart data. Try to parse with commons-upload."); final Multiset<String> indexes = HashMultiset.create(); final Multimap<String, String> params = LinkedListMultimap.create(); ServletFileUpload uploader = createServletFileUpload(config); UploadSizeLimit uploadSizeLimit = event.getMethod().getMethod().getAnnotation(UploadSizeLimit.class); uploader.setSizeMax(uploadSizeLimit != null ? uploadSizeLimit.sizeLimit() : config.getSizeLimit()); uploader.setFileSizeMax(uploadSizeLimit != null ? uploadSizeLimit.fileSizeLimit() : config.getFileSizeLimit()); logger.debug("Setting file sizes: total={}, file={}", uploader.getSizeMax(), uploader.getFileSizeMax()); try { final List<FileItem> items = uploader.parseRequest(request); logger.debug("Found attributes in the multipart form submission. Parsing them.", items.size()); for (FileItem item : items) { String name = item.getFieldName(); name = fixIndexedParameters(name, indexes); if (item.isFormField()) { logger.debug("{} is a field", name); params.put(name, getValue(item, request)); } else if (isNotEmpty(item)) { logger.debug("{} is a file", name); processFile(item, name, request); } else { logger.debug("A file field is empty: {}", item.getFieldName()); } } for (String paramName : params.keySet()) { Collection<String> paramValues = params.get(paramName); request.setParameter(paramName, paramValues.toArray(new String[paramValues.size()])); } } catch (final SizeLimitExceededException e) { reportSizeLimitExceeded(e, validator); } catch (FileUploadException e) { reportFileUploadException(e, validator); } }