* @param q The query string.
     * @param fields The fields to search in.
     * @return The QueryBuilder instance.
     */
    public QueryBuilder buildQuery(final String q, final List<String> fields) {
        try {
            final QueryBuilder queryBuilder;
            if (Strings.isNullOrEmpty(q)) {
                queryBuilder = QueryBuilders.matchAllQuery();
            } else {
                final String fullWidthSpace = "\u3000";

    }

    /**
     * Converts a TermQuery to a QueryBuilder with the given boost value.
     *
     * @param context the query context
     * @param termQuery the term query to convert
     * @param boost the boost value to apply
     * @return the converted QueryBuilder
     */
    protected QueryBuilder convertTermQuery(final QueryContext context, final TermQuery termQuery, final float boost) {

        called.set(false);
        final AtomicBoolean calledFirst = new AtomicBoolean(false);
        queryProcessor.addFilter(new QueryProcessor.Filter() {
            @Override
            public QueryBuilder execute(QueryContext context, Query query, float boost, FilterChain chain) {
                calledFirst.set(true);
                assertFalse(called.get());

    public void addQuery(QueryBuilder queryBuilder) {
        assertObjectNotNull("queryBuilder", queryBuilder);
        regQ(queryBuilder);
    }

    public void queryString(String queryString) {
        checkEsInvalidQuery("queryString", queryString);
        doQueryString(queryString, null);
    }

    public void queryString(String queryString, ConditionOptionCall<QueryStringQueryBuilder> opLambda) {

    public void addQuery(QueryBuilder queryBuilder) {
        assertObjectNotNull("queryBuilder", queryBuilder);
        regQ(queryBuilder);
    }

    public void queryString(String queryString) {
        checkEsInvalidQuery("queryString", queryString);
        doQueryString(queryString, null);
    }

    public void queryString(String queryString, ConditionOptionCall<QueryStringQueryBuilder> opLambda) {

        // Test with boost = 0.5
        QueryBuilder queryBuilder1 = queryCommand.convertWildcardQuery(queryContext, wildcardQuery, 0.5f);
        assertNotNull(queryBuilder1);

        // Test with boost = 2.0
        QueryBuilder queryBuilder2 = queryCommand.convertWildcardQuery(queryContext, wildcardQuery, 2.0f);
        assertNotNull(queryBuilder2);

        // Test with boost = 0

     * @throws IllegalArgumentException if the query builder type is not supported
     */
    public DefaultQueryBuilder(final QueryBuilder queryBuilder) {
        this.queryBuilder = queryBuilder;
        if (queryBuilder instanceof BoolQueryBuilder) {
            queryType = QueryType.BOOL;
        } else if (queryBuilder instanceof DisMaxQueryBuilder) {
            queryType = QueryType.DISMAX;
        } else {

        QueryContext context = new QueryContext("test", false);
        QueryBuilder result = booleanQueryCommand.convertBooleanQuery(context, booleanQuery, 1.0f);

        assertNull(result);
    }

    // Test convertBooleanQuery with null queryBuilder from processor
    @Test
    public void test_convertBooleanQuery_withNullQueryBuilder() {

        // Using template method
        QueryBuilder result1 = queryCommand.convertWithFieldCheck(fessConfig, context1, "title", "test", 1.0f,
                (field, boost) -> QueryBuilders.matchQuery(field, "test").boost(boost),
                (field, text, boost) -> QueryBuilders.matchQuery(field, text).boost(boost));

        // Manual implementation (for comparison)
        QueryBuilder result2;

     * @return The converted BoolQueryBuilder.
     */
    protected QueryBuilder convertBooleanQuery(final QueryContext context, final BooleanQuery booleanQuery, final float boost) {
        final BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
        for (final BooleanClause clause : booleanQuery.clauses()) {
            final QueryBuilder queryBuilder = getQueryProcessor().execute(context, clause.query(), boost);