import { ApiDocument, HttpController } from '@opra/common';
import { type Application } from 'express';
import { HttpAdapter } from './http-adapter.js';
/**
 * ExpressAdapter is a platform adapter for the Express.js framework.
 * It integrates Opra with Express applications and routers.
 */
export declare class ExpressAdapter extends HttpAdapter {
    readonly app: Application;
    protected _controllerInstances: Map<HttpController, any>;
    constructor(app: Application, document: ApiDocument, options?: HttpAdapter.Options);
    get platform(): string;
    /**
     * Closes the adapter and performs cleanup.
     *
     * @returns A promise that resolves when the adapter is closed.
     */
    close(): Promise<void>;
    /**
     * Retrieves a controller instance by its path.
     *
     * @param controllerPath - The path of the controller.
     * @returns The controller instance, or undefined if not found.
     */
    getControllerInstance<T>(controllerPath: string): T | undefined;
    protected _initRouter(): void;
    protected _createControllers(controller: HttpController): void;
}