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

    /**
     * Constructs a new FessUserNotFoundException with the specified username.
     *
     * @param username the username that was not found
     */
    public FessUserNotFoundException(final String username) {
        super("User is not found: " + username);
    }

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new UnsupportedSearchException with the specified message.
     *
     * @param msg the exception message
     */
    public UnsupportedSearchException(final String msg) {
        super(msg);
    }

    //                                                                      ==============
    /**
     * Displays the bad request error page.
     *
     * @param form the error form containing error information
     * @return HTML response for the bad request error page
     */
    @Execute
    public HtmlResponse index(final ErrorForm form) {

    /**
     * Default constructor for ErrorBusyAction.
     */
    public ErrorBusyAction() {
        super();
    }

    /**
     * Displays the busy error page.
     *
     * @param form the error form containing error information
     * @return HTML response for the busy error page
     */
    @Execute
    public HtmlResponse index(final ErrorForm form) {

/**
 * The credential for action response.
 */
public class ActionResponseCredential implements LoginCredential {

    private final Supplier<ActionResponse> action;

    /**
     * Constructor.
     * @param action The action.
     */
    public ActionResponseCredential(final Supplier<ActionResponse> action) {
        this.action = action;
    }

    /**
     * Execute the action.
     * @return The action response.

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new ServletRuntimeException wrapping the given ServletException.
     *
     * @param e The ServletException to wrap
     */
    public ServletRuntimeException(final ServletException e) {
        super(e);
    }

        // Default constructor
    }

    /**
     * Deletes user information records older than the specified number of days.
     * This method is used for data cleanup and maintenance operations.
     *
     * @param days the number of days to keep user information records
     */
    public void deleteBefore(final int days) {
        userInfoBhv.queryDelete(cb -> {

    //                                                                      ==============
    /**
     * Displays the not found error page.
     *
     * @param form the error form containing error information
     * @return HTML response for the not found error page
     */
    @Execute
    public HtmlResponse index(final ErrorForm form) {

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new QueryParseException with the specified ParseException as the cause.
     *
     * @param cause the ParseException that caused this exception
     */
    public QueryParseException(final ParseException cause) {
        super(cause);
    }

    @FunctionalInterface
    public interface ConditionOptionCall<OP extends AbstractAggregationBuilder<?>> {

        /**
         * @param op The option of condition to be set up. (NotNull)
         */
        void callback(OP op);
    }

    @FunctionalInterface
    public interface OperatorCall<CA extends EsAbstractConditionAggregation> {