import { MetadataProvider } from './MetadataProvider' ; import type { EntityMetadata , EntityProperty } from '../typings' ; import { Utils } from '../utils' ; import { Cascade , ReferenceType } from '../enums' ; deprecated export class JavaScriptMetadataProvider extends MetadataProvider { async loadEntityMetadata ( meta , name ) { const schema = this . getSchema ( meta ) ; Object . entries ( schema . properties ) . forEach ( ( [ name , prop ] ) => { if ( Utils . isString ( prop ) ) { schema . properties [ name ] = { type : prop } ; } } ) ; Utils . merge ( meta , schema ) ; Object . entries ( meta . properties ) . forEach ( ( [ name , prop ] ) => { this . initProperty ( prop , name ) ; } ) ; } /**
     * Re-hydrates missing attributes like `onUpdate` (functions are lost when caching to JSON)
     */ loadFromCache ( meta , cache ) { Utils . merge ( meta , cache ) ; const schema = this . getSchema ( meta ) ; Object . entries ( schema . properties ) . forEach ( ( [ name , prop ] ) => { if ( Utils . isObject ( prop ) ) { Object . entries ( prop ) . forEach ( ( [ attribute , value ] ) => { if ( ! ( attribute in meta . properties [ name ] ) ) { meta . properties [ name ] [ attribute ] = value ; } } ) ; } } ) ; } private initProperty ( prop , propName ) { prop . name = propName ; if ( typeof prop . reference === 'undefined' ) { prop . reference = ReferenceType . SCALAR ; } if ( prop . reference !== ReferenceType . SCALAR && typeof prop . cascade === 'undefined' ) { prop . cascade = [ Cascade . PERSIST ] ; } } private getSchema ( meta ) { if ( ! meta . path ) { return meta ; } const path = Utils . absolutePath ( meta . path , this . config . get ( 'baseDir' ) ) ; const { schema } = require ( path ) ; return schema ; } }