final Object queryFreqObj = existingSource.get(FieldNames.QUERY_FREQ);
        if (queryFreqObj == null) {
            updatedQueryFreq = queryFreq;
        } else {
            final Long existingValue = Long.parseLong(queryFreqObj.toString());
            updatedQueryFreq = queryFreq + existingValue;
        }
        map.put(FieldNames.QUERY_FREQ, updatedQueryFreq);

        final long updatedDocFreq;

      "format": "epoch_millis"
    },
    "docFreq": {
      "type": "long"
    },
    "fields": {
      "type": "keyword"
    },
    "kinds": {
      "type": "keyword"
    },
    "queryFreq": {
      "type": "long"
    },
    "roles": {
      "type": "keyword"
    },
    "languages": {
      "type": "keyword"
    },
    "score": {
      "type": "double"
    },
    "tags": {

    public static final String TEXT = "text";
    public static final String READING_PREFIX = "reading_";
    public static final String SCORE = "score";
    public static final String QUERY_FREQ = "queryFreq";
    public static final String DOC_FREQ = "docFreq";
    public static final String USER_BOOST = "userBoost";
    public static final String KINDS = "kinds";
    public static final String TIMESTAMP = "@timestamp";

        for (int i = 0; i < readings.length; i++) {
            secondLine.put("reading_" + i, readings[i]);
        }

        secondLine.put("fields", item.getFields());
        secondLine.put("queryFreq", item.getQueryFreq());
        secondLine.put("docFreq", item.getDocFreq());
        secondLine.put("userBoost", item.getUserBoost());

        queryBuilder.mustNot(QueryBuilders.existsQuery(FieldNames.READING_PREFIX + "1"));
        queryBuilder.must(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(queryFreqThreshold));
        if (!tags.isEmpty()) {
            queryBuilder.must(QueryBuilders.termsQuery(FieldNames.TAGS, tags));
        }
        if (!roles.isEmpty()) {

        final long start = System.currentTimeMillis();

        final SuggestDeleteResponse deleteResponse =
                deleteByQuery(QueryBuilders.boolQuery().must(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(1))
                        .mustNot(QueryBuilders.matchPhraseQuery(FieldNames.KINDS, SuggestItem.Kind.DOCUMENT.toString()))

                .missing(0.1f).modifier(FieldValueFactorFunction.Modifier.LOG2P).setWeight(1.0F)));
        flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(ScoreFunctionBuilders.fieldValueFactorFunction(FieldNames.QUERY_FREQ)
                .missing(0.1f).modifier(FieldValueFactorFunction.Modifier.LOG2P).setWeight(1.0F)));
        flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(

    public long getDocumentWordsNum() {
        return getNum(QueryBuilders.rangeQuery(FieldNames.DOC_FREQ).gte(1));
    }

    public long getQueryWordsNum() {
        return getNum(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(1));
    }

    private long getNum(final QueryBuilder queryBuilder) {
        final SearchResponse searchResponse = client.prepareSearch().setIndices(getSearchAlias(index)).setSize(0).setQuery(queryBuilder)