@RequestMapping(value = "/data/dateranges", method = RequestMethod.GET)
  public ResponseEntity<String> getDateRange(
      @RequestParam(value = PARAM_COLLECTION, required = true) String collection)
      throws IOException {

    CollectionSchemaInfo info = collectionsConfig.getSchema(collection);
    ReportData data = collectionsConfig.getReportData(collection);
    StringWriter writer = new StringWriter();

    JsonGenerator g = searchService.writeSearchResponseStart(writer, null);
    if (data != null) {
      for (String dateField : data.getDateFields()) {
        List<Date> dates = searchService.getSolrFieldDateRange(collection, dateField, info);
        if (dates == null || dates.size() != 2) {
          continue;
        }

        g.writeObjectFieldStart(dateField);
        g.writeStringField(DATE_RANGE_START_KEY, dates.get(0).toString());
        g.writeStringField(DATE_RANGE_END_KEY, dates.get(1).toString());
        g.writeEndObject();
      }
    }

    searchService.writeSearchResponseEnd(g);

    HttpHeaders httpHeaders = new HttpHeaders();
    httpHeaders.put(CONTENT_TYPE_HEADER, singletonList(CONTENT_TYPE_VALUE));
    return new ResponseEntity<String>(writer.toString(), httpHeaders, OK);
  }
  @RequestMapping(value = "/search", method = RequestMethod.GET)
  public ResponseEntity<String> search(
      @RequestParam(value = PARAM_COLLECTION, required = true) String collection,
      @RequestParam(value = PARAM_QUERY, required = true) String query,
      @RequestParam(value = PARAM_SORT, required = false) String sortInfo,
      @RequestParam(value = PARAM_START, required = true) Integer start,
      @RequestParam(value = PARAM_ROWS, required = true) Integer rows,
      @RequestParam(value = PARAM_FQ, required = false) String fq)
      throws IOException {

    CollectionSchemaInfo info = collectionsConfig.getSchema(collection);
    ReportData data = collectionsConfig.getReportData(collection);

    StringWriter writer = new StringWriter();

    searchService.findAndWriteSearchResults(
        collection,
        query,
        getSortClauses(sortInfo),
        start,
        rows,
        composeFilterQuery(fq, info),
        data.getFilterFacetFields(),
        "",
        false,
        info,
        writer);

    HttpHeaders httpHeaders = new HttpHeaders();
    httpHeaders.put(CONTENT_TYPE_HEADER, singletonList(CONTENT_TYPE_VALUE));
    return new ResponseEntity<String>(writer.toString(), httpHeaders, OK);
  }
  @RequestMapping(value = "/data/filters", method = RequestMethod.GET)
  public ResponseEntity<String> getFilters(
      @RequestParam(value = PARAM_COLLECTION, required = true) String collection,
      @RequestParam(value = PARAM_QUERY, required = true) String queryStr,
      @RequestParam(value = PARAM_FQ, required = false) String fq)
      throws IOException {

    ReportData data = collectionsConfig.getReportData(collection);

    StringWriter writer = new StringWriter();
    searchService.findAndWriteFacets(
        collection,
        queryStr,
        fq,
        data.getFilterFacetFields(),
        collectionsConfig.getSchema(collection),
        writer);

    HttpHeaders httpHeaders = new HttpHeaders();
    httpHeaders.put(CONTENT_TYPE_HEADER, singletonList(CONTENT_TYPE_VALUE));
    return new ResponseEntity<String>(writer.toString(), httpHeaders, OK);
  }
  @RequestMapping(value = "/data/metrics", method = RequestMethod.GET)
  public ResponseEntity<String> additionalMetrics(
      @RequestParam(value = PARAM_COLLECTION, required = true) String collection,
      @RequestParam(value = PARAM_QUERY, required = true) String query,
      @RequestParam(value = PARAM_FQ, required = false) String fq)
      throws IOException {

    ReportData data = collectionsConfig.getReportData(collection);
    CollectionSchemaInfo info = collectionsConfig.getSchema(collection);

    StringWriter writer = new StringWriter();
    JsonGenerator g = searchService.writeSearchResponseStart(writer, null);

    Map<String, FieldStatsInfo> stats =
        searchService.getStatsResults(
            collection, query, composeFilterQuery(fq, info), data.getSearchMetricsViewFields());

    data.writeMetrics(stats, g);
    searchService.writeSearchResponseEnd(g);

    HttpHeaders httpHeaders = new HttpHeaders();
    httpHeaders.put(CONTENT_TYPE_HEADER, singletonList(CONTENT_TYPE_VALUE));
    return new ResponseEntity<String>(writer.toString(), httpHeaders, OK);
  }