queryContext.addFunctionScore(list -> {
            list.add(new FilterFunctionBuilder(
                    ScoreFunctionBuilders.fieldValueFactorFunction(ComponentUtil.getFessConfig().getIndexFieldBoost())));
            ComponentUtil.getKeyMatchHelper().buildQuery(queryContext.getDefaultKeyword(), list);
            list.addAll(boostFunctionList);
        });
    }

    /**

        }
        // indexingTarget
        putResultDataBody(dataMap, Constants.INDEXING_TARGET, indexingTarget);
        //  boost
        putResultDataBody(dataMap, fessConfig.getIndexFieldBoost(), crawlingConfig.getDocumentBoost());
        // label: labelType
        final LabelTypeHelper labelTypeHelper = ComponentUtil.getLabelTypeHelper();

            return "doc_id";
        }

        @Override
        public String getIndexFieldUrl() {
            return "url";
        }

        @Override
        public String getIndexFieldBoost() {
            return "boost";
        }

        @Override
        public String getIndexFieldClickCount() {
            return "click_count";
        }

        @Override

        }
        // indexingTarget
        putResultDataBody(dataMap, Constants.INDEXING_TARGET, indexingTarget);
        //  boost
        putResultDataBody(dataMap, fessConfig.getIndexFieldBoost(), crawlingConfig.getDocumentBoost());
        // label: labelType
        putResultDataBody(dataMap, fessConfig.getIndexFieldLabel(), labelTypeHelper.getMatchedLabelValueSet(url));
        // role: roleType

     * The value is, e.g. boost <br>
     * comment: Field name for boost value in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldBoost();

    /**
     * Get the value for the key 'index.field.created'. <br>
     * The value is, e.g. created <br>
     * comment: Field name for creation date in the index.