import { IProvider, QueryOptions } from "../provider";
import { Schema } from "../../schemas/schema";
import { IRequestContext } from "../../pipeline/common";
import { QueryResult } from '../../pipeline/handlers/query/queryResult';
/**
 * Default memory provider
 */
export declare class MemoryProvider implements IProvider<any> {
    private dataFolder;
    private state;
    readonly address: string;
    /**
     * Create a memory provider instance.
     * @param dataFolder : (optional) if provided, data will be persisted on disk on EVERY create, update or delete
     */
    constructor(dataFolder?: string);
    initialize(tenant: string): () => void;
    private ensureSchema(schema);
    private save(schema);
    /**
     * Return a list of entities
     * @param options
     * @returns {Promise}
     */
    getAll(ctx: IRequestContext, schema: Schema, options: QueryOptions): Promise<QueryResult>;
    static Query(list: any, query: any, page: number, pageSize: number, cloneResult?: boolean): any[];
    private static filter(list, query, cloneResult);
    private static take(iterator, page, pageSize);
    /**
     * Read an entity
     * @param name
     * @returns {Promise}
     */
    get(ctx: IRequestContext, schema: Schema, id: string): Promise<{}>;
    /**
     * Delete an entity
     * @param id
     * @returns {Promise}
     */
    delete(ctx: IRequestContext, schema: Schema, id: string | number): Promise<boolean>;
    /**
     * Persist an entity
     * @param entity
     * @returns {Promise}
     */
    create(ctx: IRequestContext, schema: Schema, entity: any): Promise<{}>;
    /**
     * Update an entity
     * @param entity
     * @returns {Promise<T>}
     */
    update(ctx: IRequestContext, schema: Schema, entity: any): Promise<{}>;
}