public ThumbnailManager() {
        // Default constructor
    }

    /**
     * Initializes the thumbnail manager after construction.
     * Sets up base directory and starts background processing.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }

 * for REST API operations.
 */
public class DeleteBody extends DeleteForm {

    /**
     * Creates a new instance of DeleteBody.
     * This constructor initializes the request body for plugin deletion API operations,
     * extending the standard plugin DeleteForm with JSON request body functionality.
     */
    public DeleteBody() {
        super();
    }

  private UncaughtExceptionHandlers() {}

  /**
   * Returns an exception handler that exits the system. This is particularly useful for the main
   * thread, which may start up other, non-daemon threads, but fail to fully initialize the
   * application successfully.
   *
   * <p>Example usage:
   *
   * <pre>
   * public static void main(String[] args) {

    /** Serial version UID for serialization. */
    private static final long serialVersionUID = 1L;

    /**
     * Creates a new instance of DictionaryExpiredException.
     * This constructor initializes the exception to indicate that a dictionary
     * has expired and is no longer valid for use.
     */
    public DictionaryExpiredException() {
        super();
    }

    private static final Logger logger = LogManager.getLogger(FessResponseProcessor.class);

    /** Factory for creating and managing ingesters */
    private IngestFactory ingestFactory = null;

    /**
     * Initializes the processor after dependency injection.
     * Sets up the ingest factory if available in the component system.
     */
    @PostConstruct
    public void init() {
        if (ComponentUtil.hasIngestFactory()) {

     */
    public CustomSizeValidator() {
        // Empty constructor
    }

    private int min = 0;
    private int max = Integer.MAX_VALUE;
    private String message;

    @Override
    public void initialize(final CustomSize constraintAnnotation) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String minKey = constraintAnnotation.minKey();
        if (StringUtil.isNotBlank(minKey)) {

   * its runtime check.
   *
   * <p>An example use case for this method is in implementing an {@code Iterator<T>} whose {@code
   * next} field is lazily initialized. The type of that field would be {@code @Nullable T}, and the
   * code would be responsible for populating a "real" {@code T} (which might still be the value

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class AbstractListTester<E extends @Nullable Object> extends AbstractCollectionTester<E> {
  /*
   * Previously we had a field named list that was initialized to the value of
   * collection in setUp(), but that caused problems when a tester changed the
   * value of list or collection but not both.
   */
  protected final List<E> getList() {
    return (List<E>) collection;

 * Contains query and document ID fields for targeted document deletion.
 */
public class DeleteForm {

    /**
     * Creates a new instance of DeleteForm.
     * This constructor initializes the form for deleting documents from search results
     * in the admin interface with validation rules for query and document identification.
     */
    public DeleteForm() {

    /**
     * Default constructor for FacetQueryView.
     */
    public FacetQueryView() {
        // Default constructor
    }

    /**
     * Initializes the facet query view with default file type queries.
     * This method is called after dependency injection to set up file type facets
     * and register all queries with the FacetInfo component.
     */
    @PostConstruct