docMap.put(fessConfig.getIndexFieldPrimaryTerm(), hit.getPrimaryTerm());
                    return docMap;
                }, cursor);
    }

    public long deleteByQuery(final HttpServletRequest request, final SearchRequestParams params) {
        final String query = ComponentUtil.getQueryStringBuilder().params(params).build();

            return (List<String>) value;
        }
        throw new IllegalArgumentException("The value should be String or List, but " + value.getClass());
    }

    public static boolean deleteByQuery(final Client client, final SuggestSettings settings, final String index,
            final QueryBuilder queryBuilder) {
        try {

                searchEngineClient.admin().indices().prepareRefresh(index).execute().actionGet();
                final long numOfDeleted = searchEngineClient.deleteByQuery(index, queryBuilder);
                logger.info("Deleted {} old docs.", numOfDeleted);
            } catch (final Exception e) {
                logger.error("Could not delete old docs at {}", dataConfig, e);

    protected void deleteKeyFromArray(final String index, final String type, final String key) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {
            SuggestUtil.deleteByQuery(client, settings, actualIndex, QueryBuilders.termQuery(FieldNames.ARRAY_KEY, key));
        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to delete all from array.", e);
        }

    }

    @Override
    public Client filterWithHeader(final Map<String, String> headers) {
        client.filterWithHeader(headers);
        return this;
    }

    public int deleteByQuery(final String index, final String type, final QueryBuilder queryBuilder) {
        SearchResponse response =

                scrollId = response.getScrollId();
            }
        } finally {
            deleteScrollContext(scrollId);
        }
        return count;
    }

    public long deleteByQuery(final String index, final QueryBuilder queryBuilder) {

        final FessConfig fessConfig = ComponentUtil.getFessConfig();