import { Observable } from 'rxjs';
import { CachedDataStore } from './cached-data-store';
/**
 * Defines a single value data store using browser storage as the underlying storage mechanism
 * This is used as a base class for LocalDataStore and SessionDataStore which use LocalStorage and SessionStorage respectively
 */
export declare abstract class BrowserStorageDataStore<TData> extends CachedDataStore<TData, string> {
    protected storageKey: string;
    protected storage: Storage;
    /**
     * Initializes a new instance of DataStore<T>
     */
    constructor(storageKey: string, storage: Storage);
    /**
     * Implementation to get the stored data
     */
    protected getData(): Observable<string>;
    /**
     * Implementation to set the stored data
     */
    protected setData(data: string): Observable<void>;
    /**
     * Implementation to clear the stored data
     */
    protected clearData(): Observable<void>;
    /**
     * Transforms data in preparation for storage. Default behavior is no operation
     */
    protected transformToStore(data: TData): string;
    /**
     * Transforms data in preparation for usage. Default behavior is no operation
     */
    protected transformFromStore(storedData: string): TData;
    /**
     * Listens for when other windows have modified our storage key and emits when the stored data has changed.
     */
    private listenForStorageChanges;
}