/// <reference path="../../../adonis-typings/bodyparser.d.ts" />
import { MultipartFileContract } from '@ioc:Adonis/Core/BodyParser';
/**
 * Validates the file extension
 */
export declare class ExtensionValidator {
    private file;
    private allowedExtensions?;
    validated: boolean;
    /**
     * Update the expected file extensions
     */
    get extensions(): string[] | undefined;
    set extensions(extnames: string[] | undefined);
    constructor(file: MultipartFileContract);
    /**
     * Report error to the file
     */
    private reportError;
    /**
     * Validating the file in the streaming mode. During this mode
     * we defer the validation, until we get the file extname.
     */
    private validateWhenGettingStreamed;
    /**
     * Validate the file extension after it has been streamed
     */
    private validateAfterConsumed;
    /**
     * Validate the file
     */
    validate(): void;
}