/**
 * Forked from [class-transformer-validator](https://github.com/MichalLytek/class-transformer-validator).
 * By [Michał Lytek](https://github.com/MichalLytek).
 */
import { ValidatorOptions } from 'class-validator';
import { ClassTransformOptions } from 'class-transformer';
export declare type ClassType<T> = new (...args: unknown[]) => T;
export interface TransformValidationOptions {
    validator?: ValidatorOptions;
    transformer?: ClassTransformOptions;
}
/**
 * Asynchronously converts plain object to class (constructor) object.
 * Reject the promise if the object doesn't pass validation.
 *
 * @param {ClassType<T>} classType The Class to convert object to
 * @param {string | object | object[]} somethingToTransform The string containing JSON, object, or array of objects to instantiate and validate
 * @param {TransformValidationOptions} [options] Optional options object for class-validator and class-transformer
 * @returns {Promise<T|T[]>} Promise of object of given class T or array of objects given class T
 */
export declare function transformAndValidate<T extends object>(classType: ClassType<T>, somethingToTransform: string | object | object[], options?: TransformValidationOptions): Promise<T | T[]>;
/**
 * Synchronously converts JSON string to class (constructor) object.
 * Throws error if the object parsed from string doesn't pass validation.
 *
 * @param {ClassType<T>} classType The Class to parse and convert JSON to
 * @param {string | object | object[]} somethingToTransform The string containing JSON, object, or array of objects to instantiate and validate
 * @param {TransformValidationOptions} [options] Optional options object for class-validator and class-transformer
 * @returns {T|T[]} Object of given class T or array of objects given class T
 */
export declare function transformAndValidateSync<T extends object>(classType: ClassType<T>, somethingToTransform: string | object | object[], options?: TransformValidationOptions): T | T[];