/// <reference types="node" />
/// <reference types="node" />
import { Readable, Writable } from 'stream';
export interface DataSource {
    /**
     * @returns a readable stream from the data source.
     */
    asReadStream(): Promise<Readable>;
    /**
     * @returns a writable stream to the data source.
     */
    asWriteStream(obj?: any): Writable;
    /**
     * @returns an array like buffer from the data source.
     */
    asArrayBuffer(): Promise<ArrayBufferLike>;
    /**
     * @returns a buffer from the data source.
     */
    asBuffer(): Promise<Buffer>;
    /**
     * @returns a promise resolved when the content of
     * the data source has been written to the specified
     * file. The promise resolves the path of the
     * output file.
     * @param filePath the path of the file to write to.
     * @note the file path must be absolute.
     */
    asFile(filePath?: string): Promise<string>;
}