import { StateCache } from './';
import { State } from '../state';
/**
 * The 'Forever' cache stores any State for as long as the application
 * lives.
 *
 * It is a good default for most applications, but it means that if
 * a resource was changed server-side, Ketting will not pick up that change
 * until something was done to expire caches.
 *
 * Executing an unsafe method, calling clearCache() on a resource, or
 * when a resource appears in Location, Content-Location, or "invalidates"
 * link relationships.
 */
export declare class ForeverCache implements StateCache {
    private cache;
    constructor();
    /**
     * Store a State object.
     *
     * This function will clone the state object before storing
     */
    store(state: State): void;
    /**
     * Retrieve a State object from the cache by its absolute uri
     */
    get(uri: string): State | null;
    /**
     * Return true if a State object with the specified uri exists in the cache
     */
    has(uri: string): boolean;
    /**
     * Delete a State object from the cache, by its uri
     */
    delete(uri: string): void;
    /**
     * Purge the entire cache
     */
    clear(): void;
}