export interface Metadata { name : string ; dependencies ? : Record < string , DependencyMetadata > ; } export namespace Metadata { const $metadata = Symbol ( "metadata" ) ; export function get ( target , init ? ) { let type = null ; if ( typeof target === "function" ) type = target ; else if ( typeof target === "object" ) type = target . constructor ; if ( type && ! type [ $metadata ] && init !== false ) type [ $metadata ] = { } ; return type && type [ $metadata ] ; } export function dependencies ( type ) { let metadata = get ( type ) as Metadata ; return metadata . dependencies || { } ; } } export interface DependencyMetadata { resource : string ; application : string ; }