import 'reflect-metadata';
import type { EggProtoImplClass, MetaDataKey } from '@eggjs/tegg-types';
export declare class MetadataUtil {
    static deleteMetaData(metadataKey: MetaDataKey, clazz: EggProtoImplClass): void;
    static defineMetaData<T>(metadataKey: MetaDataKey, metadataValue: T, clazz: EggProtoImplClass): void;
    static getOwnMetaData<T>(metadataKey: MetaDataKey, clazz: EggProtoImplClass): T | undefined;
    static hasMetaData(metadataKey: MetaDataKey, clazz: EggProtoImplClass, propKey?: PropertyKey): boolean;
    static getMetaData<T>(metadataKey: MetaDataKey, clazz: EggProtoImplClass, propKey?: PropertyKey): T | undefined;
    static getBooleanMetaData(metadataKey: MetaDataKey, clazz: EggProtoImplClass): boolean;
    static getOwnBooleanMetaData(metadataKey: MetaDataKey, clazz: EggProtoImplClass): boolean;
    static getArrayMetaData<T>(metadataKey: MetaDataKey, clazz: EggProtoImplClass): Array<T>;
    /**
     * init array metadata
     * not inherit parent metadata
     * return value true means use default value
     * return value false means use map value
     */
    static initArrayMetaData<T>(metadataKey: MetaDataKey, clazz: EggProtoImplClass, defaultValue: Array<T>): Array<T>;
    /**
     * init own array metadata
     * if parent metadata exists, inherit
     * if parent metadata not exits, use default value
     * return value true means use default value
     * return value false means use map value
     */
    static initOwnArrayMetaData<T>(metadataKey: MetaDataKey, clazz: EggProtoImplClass, defaultValue: Array<T>): Array<T>;
    /**
     * init own map metadata
     * if parent metadata exists, inherit
     * if parent metadata not exits, use default value
     * return value true means use default value
     * return value false means use map value
     */
    static initOwnMapMetaData<K, V>(metadataKey: MetaDataKey, clazz: EggProtoImplClass, defaultValue: Map<K, V>): Map<K, V>;
    static getOrStoreMetaData<T>(metadataKey: MetaDataKey, clazz: EggProtoImplClass, metadataValue: T): T;
}