*
     * @param rule the boost document rule containing match and boost expressions
     */
    public DocBoostMatcher(final BoostDocumentRule rule) {
        matchExpression = rule.getUrlExpr();
        boostExpression = rule.getBoostExpr();
        scriptType = ComponentUtil.getFessConfig().getCrawlerDefaultScript();
    }

    /**

                (et, vl) -> ((BoostDocumentRule) et).setUpdatedTime(DfTypeUtil.toLong(vl)), "updatedTime");
        setupEpg(_epgMap, et -> ((BoostDocumentRule) et).getUrlExpr(),
                (et, vl) -> ((BoostDocumentRule) et).setUrlExpr(DfTypeUtil.toString(vl)), "urlExpr");
    }

    @Override
    public PropertyGateway findPropertyGateway(final String prop) {