break;
        case DISMAX:
            ((DisMaxQueryBuilder) queryBuilder).add(innerQueryBuilder);
            break;
        default:
            break;
        }
        return this;
    }

    /**
     * Enumeration of supported query types.
     */
    enum QueryType {
        /** Boolean query type. */
        BOOL,
        /** DisMax query type. */
        DISMAX;
    }

    /**
     * Creates a default query builder based on the configured query type.
     * @return The default query builder (either dismax or bool query).
     */
    protected DefaultQueryBuilder createDefaultQueryBuilder() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if ("dismax".equals(fessConfig.getQueryDefaultQueryType())) {
            final DisMaxQueryBuilder disMaxQuery = QueryBuilders.disMaxQuery();

# Whether to allow transpositions in fuzzy content queries.
query.boost.fuzzy.content.transpositions=true

# Default query type.
query.default.query_type=bool
# Tie breaker value for dismax queries.
query.dismax.tie_breaker=0.1
# Minimum should match value for boolean queries.
query.bool.minimum_should_match=

# Number of expansions for prefix queries.
query.prefix.expansions=50
# Slop value for prefix queries.

    /**
     * Get the value for the key 'query.dismax.tie_breaker'. <br>
     * The value is, e.g. 0.1 <br>
     * comment: Tie breaker value for dismax queries.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getQueryDismaxTieBreaker();

    /**
     * Get the value for the key 'query.dismax.tie_breaker' as {@link java.math.BigDecimal}. <br>