return null;
        }
    }

    /**
     * Builds the HTTP route planner with proxy configuration.
     *
     * @return The configured route planner, or null if no proxy is configured
     */
    protected HttpRoutePlanner buildRoutePlanner() {
        if (routePlanner != null) {
            return routePlanner;
        }

        // proxy

 * and optionally at specific positions in the processing order.</p>
 *
 * <p>This factory is typically initialized through dependency injection and can be
 * configured with initialization parameters that are passed to all registered clients.</p>
 *
 * <p>Features:</p>
 * <ul>
 *   <li>Pattern-based client mapping</li>
 *   <li>Ordered client registration</li>

/**
 * RegexRule is a rule implementation that uses regular expressions to match against the ResponseData.
 * It allows defining multiple regular expressions for different fields of the ResponseData.
 * The rule can be configured to require all regular expressions to match (allRequired = true) or
 * only one of them (allRequired = false). It also supports a default rule that always matches.
 *
 * <p>

     */
    public ExtractorBuilder cacheFileSize(final int cacheFileSize) {
        this.cacheFileSize = cacheFileSize;
        return this;
    }

    /**
     * Extracts data from the input stream using the configured parameters.
     *
     * @return the extracted data
     * @throws MaxLengthExceededException if content length exceeds maximum allowed
     * @throws ExtractException if extraction fails
     */

        // NOP
    }

    /**
     * Initializes the API extractor, setting up the HTTP client and configuration.
     * This method is called after construction to initialize the HTTP client with
     * configured timeouts, authentication, and request headers.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initializing {}", ApiExtractor.class.getName());

 *
 * <p>Inner class:</p>
 * <ul>
 *   <li>DefaultContentsAnalyzer: Implements the SuggestAnalyzer interface to analyze text and retrieve tokens using
 *       the configured analyzers.</li>
 * </ul>
 *
 * <p>Protected static class:</p>
 * <ul>
 *   <li>FieldAnalyzerMapping: Holds the analyzer names for different types of analysis (reading, reading term,

 *   <li>Execution: Starts the crawler threads and waits for them to complete.</li>
 *   <li>Cleanup: Deletes the crawled data and clears the URL filter.</li>
 * </ol>
 *
 * <p>The crawler can be configured with various parameters, such as the number of threads,
 * the maximum depth of crawling, and URL filters.
 *
 * <p>Example usage:
 * <pre>
 *   Crawler crawler = new Crawler();

            connected = true;
        } else {
            logger.warn("Could not connect to {}", address);
        }
    }

    /**
     * Creates a new OpenSearch client based on the configured address.
     *
     * @return The created OpenSearch client.
     */
    protected Client createClient() {
        final String[] hosts =

 * </p>
 *
 * <p>
 * The getData method returns the data extracted from AccessResultData. It can return either a String representation of the XML or a Map/Bean representation based on the configured dataClass.
 * </p>
 *
 * <p>
 * Example Usage:
 * </p>
 *
 * <pre>
 * XmlTransformer transformer = new XmlTransformer();
 * transformer.setNamespaceAware(true);
 * transformer.setCacheDuration(30);