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

        }
        final FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery(queryBuilder,
                ScoreFunctionBuilders.fieldValueFactorFunction(FieldNames.QUERY_FREQ).missing(0));
        functionScoreQueryBuilder.boostMode(CombineFunction.REPLACE);
        return functionScoreQueryBuilder;
    }

    /**

     */
    protected void buildBoostQuery(final QueryContext queryContext) {
        queryContext.addFunctionScore(list -> {
            list.add(new FilterFunctionBuilder(
                    ScoreFunctionBuilders.fieldValueFactorFunction(ComponentUtil.getFessConfig().getIndexFieldBoost())));
            ComponentUtil.getKeyMatchHelper().buildQuery(queryContext.getDefaultKeyword(), list);
            list.addAll(boostFunctionList);
        });
    }