protected AbstractOperation createOperation(
Project project, HttpServletRequest request, JSONObject engineConfig) throws Exception {
String columnName = request.getParameter("columnName");
String similarValue = request.getParameter("similarValue");
Judgment judgment = Recon.stringToJudgment(request.getParameter("judgment"));
ReconCandidate match = null;
String id = request.getParameter("id");
if (id != null) {
String scoreString = request.getParameter("score");