defaultQuery.add(builder.apply(fessConfig.getIndexFieldContent() + "_" + lang,
                    fessConfig.getQueryBoostContentLangAsDecimal().floatValue()));
            if (importantContantLangBoost >= 0.0f) {
                defaultQuery.add(builder.apply(fessConfig.getIndexFieldImportantContent() + "_" + lang, importantContantLangBoost));
            }

            }

            @Override
            public String getQueryBoostContentLang() {
                return "0.5";
            }

            @Override
            public BigDecimal getQueryBoostContentLangAsDecimal() {
                return new BigDecimal("0.5");
            }

            @Override
            public String getQueryPrefixExpansions() {
                return "50";
            }

            @Override
            public BigDecimal getQueryBoostTitleLangAsDecimal() {
                return new BigDecimal("1.0");
            }

            @Override
            public BigDecimal getQueryBoostContentLangAsDecimal() {
                return new BigDecimal("0.5");
            }

            @Override
            public BigDecimal getQueryBoostImportantContentLangAsDecimal() {