import { HttpRequest } from '@angular/common/http';
import { ResourceCache } from './resource-cache';
import { ResourceCacheItem, ResourceCacheItemPromisable } from './resource-cache-item';
/**
 * Cache class that implements caching in the memory of the application. Thus this cache
 * is not persistent - an application reload will result in an empty cache.
 *
 * Note that this cache implementation only caches HTTP `GET` calls that expect a "text" or
 * "json" result. Anything else results in a cache-miss.
 */
export declare class ResourceMemoryCache implements ResourceCache {
    protected data: Map<string, ResourceCacheItemPromisable>;
    constructor();
    /**
     * Put that request/response pair on the cache.
     * @param {HttpRequest<any>} request
     * @param {any} obj
     */
    put(request: HttpRequest<any>, obj: ResourceCacheItemPromisable): ResourceCacheItemPromisable;
    /**
     * Pop the response for a request from the cache.
     * @param {HttpRequest<any>} request
     * @returns {any}
     */
    pop(request: HttpRequest<any>): ResourceCacheItemPromisable;
    /**
     * Get the response for a request from the cache.
     * @param {HttpRequest<any>} request
     * @returns {any}
     */
    get(request: HttpRequest<any>): ResourceCacheItemPromisable;
    /**
     * Checks if the given request is on the cache.
     * @param {HttpRequest<any>} request
     * @returns {boolean}
     */
    has(request: HttpRequest<any>): boolean;
    /**
     * Invalidate all data from the cache.
     */
    invalidate(): void;
    populate(urlAttr: string, items: ResourceCacheItem[]): void;
    /**
     * Get a cache key for the request. Returns `null` if the request is not
     * cacheable.
     * @param {HttpRequest<any>} request
     * @returns {string}
     */
    protected getKey(request: HttpRequest<any>): string;
}