/// <reference types="node" />
import { Transform } from 'stream';
import { MapperOptions } from './mapperOptions';
/**
 * Maps input stream to derivative readable stream
 */
export default class Mapper extends Transform {
    /**
     * @param inputObjectMode True if input data is object stream, false if raw data chunks
     * @param outputObjectMode True if output data is object stream, false if raw data chunks
     * @param abortOnError True if error in derivative stream should emit error, false otherwise
     */
    static DEFAULT_OPTIONS: MapperOptions;
    private _factory;
    private _options;
    private _stream;
    private _notifyTransformComplete;
    private readonly _onStreamEndHandler;
    private readonly _onStreamCloseHandler;
    private readonly _onStreamErrorHandler;
    private readonly _onStreamDataHandler;
    /**
     * @constructor
     *
     * @param factory Derivative stream factory
     * @param options Mapping options
     */
    constructor(factory: Function, options?: MapperOptions);
    /**
     * https://nodejs.org/api/stream.html#stream_transform_transform_chunk_encoding_callback
     * @override
     */
    _transform(chunk: Buffer | string | any, encoding: string, callback: Function): void;
    /**
     * https://nodejs.org/api/stream.html#stream_writable_destroy_err_callback
     * @override
     */
    _destroy(error: Error, callback: any): void;
    /**
     * Detaches from current stream
     */
    _detachFromStream(): void;
    /**
     * Handles stream end event
     */
    _onStreamEnd(): void;
    /**
     * Handles stream close event
     */
    _onStreamClose(): void;
    /**
     * Handles stream error event
     */
    _onStreamError(error: Error): void;
    /**
     * Handles stream readable event
     */
    _onStreamData(chunk: any): void;
}