import { CloudEvent } from '../models/cloud-event/cloud-event';
import { IReference, IReferenceSubject } from './types';
/**
 * A helper that allows to resolve references
 * against a cloud event.
 */
export declare class ReferenceResolver {
    private event;
    /**
     * `ReferenceResolver` constructor.
     * @param event the cloud event to resolve the
     * reference against.
     */
    constructor(event: CloudEvent);
    /**
     * Resolves a URL reference.
     * @param reference the reference to resolve.
     * @returns
     */
    private resolveUrl;
    /**
     * Resolves an attribute reference.
     * @param reference the reference to resolve.
     */
    private resolveAttribute;
    /**
     * Resolves a value reference.
     * @param reference the reference to resolve.
     */
    private resolveValue;
    /**
     * Resolves a pointer reference.
     * @param reference the reference to resolve.
     */
    private resolvePointer;
    /**
     * Resolves the given reference against the
     * cloud event.
     * @param reference the reference to resolve.
     */
    resolve<T extends IReferenceSubject>(reference: IReference<T>): Promise<any>;
}