import { IConversionValidation } from '../types';
/**
 * Wrapper methods to test the datatype of the given value
 */
export declare abstract class DataUtility {
    static isUndefined(data: any): boolean;
    static isUndefinedOrNull(data: any): boolean;
    static isNull(data: any): boolean;
    static isEmpty(data: any): boolean;
    static isFunction(data: any): boolean;
    static isString(data: any): boolean;
    static isRegExp(data: any): boolean;
    static isBoolean(data: any): boolean;
    static isStrictBoolean(data: any): boolean;
    static isNumber(data: any): boolean;
    /**
     * Strict - does not use string conversion
     */
    static isStrictNumber(data: any): boolean;
    static isArray(data: any): boolean;
    static isInteger(data: any): boolean;
    static toNumber(data: any): IConversionValidation<number>;
    static toInteger(data: any): IConversionValidation<number>;
    static toBoolean(data: any): IConversionValidation<boolean>;
}