/**
     * Default constructor for RelatedQueryHelper.
     * Initializes the helper with an empty related query map.
     */
    public RelatedQueryHelper() {
        super();
    }

    /**
     * Initializes the RelatedQueryHelper after dependency injection is complete.
     * This method is called automatically by the dependency injection framework

     */
    @Resource
    protected RelatedContentHelper relatedContentHelper;

    /**
     * The helper for related queries.
     */
    @Resource
    protected RelatedQueryHelper relatedQueryHelper;

    // ===================================================================================
    //                                                                               Hook

            if (StringUtil.isNotBlank(query)) {
                if (ComponentUtil.hasRelatedQueryHelper()) {
                    final RelatedQueryHelper relatedQueryHelper = ComponentUtil.getRelatedQueryHelper();
                    final String[] relatedQueries = relatedQueryHelper.getRelatedQueries(query);
                    if (relatedQueries.length == 0) {
                        appendQuery(queryBuf, query);

            return;
        }

        final SearchHelper searchHelper = ComponentUtil.getSearchHelper();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final RelatedQueryHelper relatedQueryHelper = ComponentUtil.getRelatedQueryHelper();
        final RelatedContentHelper relatedContentHelper = ComponentUtil.getRelatedContentHelper();

        String query = null;