/// <reference types="node" />
import { LocalDataFile } from './LocalDataFile';
import { LocalFileSourceNode } from '../types';
import { Stats as FSStats } from 'fs';
/**
 * Represents a data file on the node platform.
 */
export declare class LocalDataFileNode extends LocalDataFile {
    /**
     * Utility function to wrap a file as a [[DataFile]] for this platform.
     * @param source - The file to wrap
     */
    static fromSource(source: LocalFileSourceNode): Promise<LocalDataFileNode>;
    /**
     * Node file handle returned by the `fs.open` function
     */
    private handle;
    /**
     * File stats for the wrapped file, used to obtain the byte length of the file during slicing
     */
    private stats;
    /**
     * @param handle - A node file handle
     * @param stats - Stats for the file the handle points at
     */
    constructor(handle: number, stats: FSStats);
    /**
     * The total length, in bytes, of the file this instance represents.
     */
    get byteLength(): Promise<number>;
    /**
     * Closes the local file handle for the current platform. After this function is called all subsequent operations
     * on this file, or any other data sources depending on this file, will fail.
     */
    close(): void;
    /**
     * Loads the file into an ArrayBuffer. Optionally a `start` and `end` can be specified to load a part of the file.
     * @param start - The offset at which the data will start loading
     * @param end - The offset at which the data will stop loading
     */
    loadData(start?: number, end?: number): Promise<ArrayBuffer>;
    /**
     * Loads data into a buffer with the specified parameters.
     * @param buffer - The buffer in which the data will be loaded. It must be large enough to fit the data requested
     * @param offset - The byte offset within the buffer at which the data will be written
     * @param start - The byte offset within the file where data will be read
     * @param end - The byte offset within the file at which the data will stop being read
     */
    private loadDataIntoBuffer;
}