import { Schema } from '../schema';
import { CustomValidations, FactoryFunction, FieldMap, SchemaDef } from '../interfaces/schema.types';
import { CastOptions } from '../../utils/cast-strategy';
/**
 * Build the fields using the given definition.
 * If the [[obj]] is a schema instance, the data will be taken from the fields provided.
 * @function
 * @public
 *
 * @param {Schema|Object} obj the definition or schema instance
 * @param strict will drop all properties not defined in the schema
 * @returns {FieldMap}
 * @throws {Error}
 *
 * @example
 *  ```ts
 *    const fields = buildFields({ name: String, hasChild: { type: Boolean, default: true } });
 *  ```
 */
export declare const buildFields: (obj: Schema | SchemaDef, strict?: boolean) => FieldMap;
/**
 * Validate data using the schema definition.
 * @param data that is going to be validated
 * @param schema that will be used to validate
 * @param options
 * @throws BuildSchemaError, ValidationError
 * @example
 * ```ts
 *    const data = {
 *      name: "John",
 *      age: "50"
 *    };
 *    const schema = new Schema({
 *      name: String,
 *      age: {type: Number, intVal: true}
 *    });
 *    const strictSchema = new Schema({
 *      name: String,
 *      age: {type: Number, intVal: true}
 *     },
 *     {
 *      validationStrategy: VALIDATION_STRATEGY.STRICT
 *     });
 *    console.log(castSchema(data, schema)); // Print { name: "John", age: 50 }
 *    console.log(castSchema(data, strictSchema)); // Throw "Property age must be of type Number"
 * ```
 */
export declare const validate: (data: any, schema: Schema | SchemaDef, options?: CastOptions) => any;
/**
 * Apply default values defined on schema to an object instance.
 * @param obj reference to object instance
 * @param schema definition will be used to determine default definitions
 *
 * @example
 * ```ts
 *  const schema = { name: { type: String, default: 'John' }, hasChild: { type: Boolean, default: true } };
 *  const obj: any = applyDefaultValue(obj, schema)
 *
 *  console.log(obj);
 * ```
 */
export declare const applyDefaultValue: (obj: any, schema: Schema | SchemaDef) => any;
/**
 * Register a custom type to Schema supported types.
 * @function
 * @param name
 * @param factory
 * @throws Error
 * @example
 *  ```ts
 *    registerType(Int8.name, (fieldName, opts) => new Int8(fieldName, opts.required));
 *  ```
 */
export declare const registerType: (name: string, factory: FactoryFunction) => void;
/**
 * Register custom validators to Schema validators register.
 * @function
 * @param validators
 * @throws Error
 * @example
 *  ```ts
 *    addValidators({
 *      email: (value) => {
 *        regexp = new RegExp(/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/);
 *        if (!regexp.test(value)) {
 *          throw new Error('Email address is invalid.')
 *        }
 *      }
 *    });
 *
 *    const ContactSchema = new Schema({
 *      name: String,
 *      contact: { type: String, validator: 'email' }
 *    });
 *  ```
 */
export declare const addValidators: (validators: CustomValidations) => void;
export declare const mergeHooks: (hook: Record<string, unknown[]>, other: Record<string, unknown[]>) => {
    [x: string]: unknown[];
};