*/
    public CharMappingCreator() {
        super("mapping.*\\.txt");
    }

    /**
     * Registers this creator with the dictionary manager after construction.
     */
    @PostConstruct
    public void register() {
        if (logger.isInfoEnabled()) {
            logger.info("Loaded {}", this.getClass().getSimpleName());
        }

    protected List<DuplicateHost> duplicateHostList;

    /**
     * Default constructor for DuplicateHostHelper.
     * Creates a new duplicate host helper instance.
     */
    public DuplicateHostHelper() {
        // Default constructor
    }

    /**
     * Initializes the duplicate host helper after construction.
     * Loads duplicate host configurations from the DuplicateHostService.
     */

     */
    protected FilterChain filterChain;

    /**
     * Initializes the query processor after construction.
     * This method creates the initial filter chain from the registered filters.
     * Called automatically by the DI container after bean construction.
     */
    @PostConstruct
    public void init() {
        createFilterChain();
    }

    /**

    /**
     * Constructor for ProtwordsCreator.
     * Initializes the creator with a pattern to match protwords files.
     */
    public ProtwordsCreator() {
        super("protwords.*\\.txt");
    }

    /**
     * Registers this creator with the dictionary manager.
     * This method is called automatically after construction to add this creator to the dictionary manager.
     */

     */
    public ApiExtractor() {
        // 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()) {

    /** Flag indicating whether the process has timed out */
    protected boolean processTimeout = false;

    /**
     * Default constructor for ExecJob.
     * Initializes default values for job configuration.
     */
    protected ExecJob() {
        // Default constructor
    }

    /**
     * Executes the job and returns the result as a string.

    protected Set<String> availableSearcherNameSet;

    /**
     * Default constructor for RankFusionProcessor.
     * Initializes the processor with default values. The actual initialization
     * is performed by the init() method which is called after construction.
     */
    public RankFusionProcessor() {
        // Default constructor - initialization is done in init() method
    }

    /**

    protected List<DictionaryCreator> creatorList = new ArrayList<>();

    /**
     * Default constructor for DictionaryManager.
     * Creates a new dictionary manager with an empty creator list.
     */
    public DictionaryManager() {
        // Default constructor
    }

    /**
     * Initializes the dictionary manager after construction.
     * Sets up the relationship between this manager and all registered creators.
     */

    protected static final String SIMILAR_DOC_HASH_PREFIX = "$";

    /**
     * Default constructor for DocumentHelper.
     * Creates a new document helper instance.
     */
    public DocumentHelper() {
        // Default constructor
    }

    /**
     * Initializes the document helper after construction.
     * Sets up the TikaExtractor with configuration parameters for text processing.
     */

**Strategy**: `CrawlerClient`, `Extractor`, `Transformer` - pluggable implementations
**Builder**: `RequestDataBuilder`, `ExtractorBuilder` - fluent construction
**Template Method**: `AbstractCrawlerClient`, `AbstractExtractor` - common logic with overrides
**DI**: LastaFlute container with `@Resource` and XML config

### Core Principles

**Thread Safety**: