/// <reference types="express" />
import { HandlerMetadata } from "./HandlerMetadata";
import * as Express from "express";
/**
 * Transform a handler to a express handler
 *
 * Support required param check, and param convert for PathParam, BodyParam, QueryParam
 *
 */
export declare class HandlerTransformer {
    private _handlerMetadata;
    readonly handlerMetadata: HandlerMetadata;
    constructor(handlerMetadata: HandlerMetadata);
    transform(): ((err: any, req: Express.Request, res: Express.Response, next: Express.NextFunction) => Promise<any>) | ((req: Express.Request, res: Express.Response, next: Express.NextFunction) => Promise<any>);
    private invokeMethod(request, response, next, error?);
}