| 1 | 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{ TypeMetadata, ExposeMetadata, ExcludeMetadata, TransformMetadata } from './interfaces';\nimport { TransformationType } from './enums';\n\n/**\n * Storage all library metadata.\n */\nexport class MetadataStorage {\n // -------------------------------------------------------------------------\n // Properties\n // -------------------------------------------------------------------------\n\n private _typeMetadatas = new Map<Function, Map<string, TypeMetadata>>();\n private _transformMetadatas = new Map<Function, Map<string, TransformMetadata[]>>();\n private _exposeMetadatas = new Map<Function, Map<string, ExposeMetadata>>();\n private _excludeMetadatas = new Map<Function, Map<string, ExcludeMetadata>>();\n private _ancestorsMap = new Map<Function, Function[]>();\n\n // -------------------------------------------------------------------------\n // Adder Methods\n // -------------------------------------------------------------------------\n\n addTypeMetadata(metadata: TypeMetadata): void {\n if (!this._typeMetadatas.has(metadata.target)) {\n this._typeMetadatas.set(metadata.target, new Map<string, TypeMetadata>());\n }\n this._typeMetadatas.get(metadata.target).set(metadata.propertyName, metadata);\n }\n\n addTransformMetadata(metadata: TransformMetadata): void {\n if (!this._transformMetadatas.has(metadata.target)) {\n this._transformMetadatas.set(metadata.target, new Map<string, TransformMetadata[]>());\n }\n if (!this._transformMetadatas.get(metadata.target).has(metadata.propertyName)) {\n this._transformMetadatas.get(metadata.target).set(metadata.propertyName, []);\n }\n this._transformMetadatas.get(metadata.target).get(metadata.propertyName).push(metadata);\n }\n\n addExposeMetadata(metadata: ExposeMetadata): void {\n if (!this._exposeMetadatas.has(metadata.target)) {\n this._exposeMetadatas.set(metadata.target, new Map<string, ExposeMetadata>());\n }\n this._exposeMetadatas.get(metadata.target).set(metadata.propertyName, metadata);\n }\n\n addExcludeMetadata(metadata: ExcludeMetadata): void {\n if (!this._excludeMetadatas.has(metadata.target)) {\n this._excludeMetadatas.set(metadata.target, new Map<string, ExcludeMetadata>());\n }\n this._excludeMetadatas.get(metadata.target).set(metadata.propertyName, metadata);\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n findTransformMetadatas(\n target: Function,\n propertyName: string,\n transformationType: TransformationType\n ): TransformMetadata[] {\n return this.findMetadatas(this._transformMetadatas, target, propertyName).filter(metadata => {\n if (!metadata.options) return true;\n if (metadata.options.toClassOnly === true && metadata.options.toPlainOnly === true) return true;\n\n if (metadata.options.toClassOnly === true) {\n return (\n transformationType === TransformationType.CLASS_TO_CLASS ||\n transformationType === TransformationType.PLAIN_TO_CLASS\n );\n }\n if (metadata.options.toPlainOnly === true) {\n return transformationType === TransformationType.CLASS_TO_PLAIN;\n }\n\n return true;\n });\n }\n\n findExcludeMetadata(target: Function, propertyName: string): ExcludeMetadata {\n return this.findMetadata(this._excludeMetadatas, target, propertyName);\n }\n\n findExposeMetadata(target: Function, propertyName: string): ExposeMetadata {\n return this.findMetadata(this._exposeMetadatas, target, propertyName);\n }\n\n findExposeMetadataByCustomName(target: Function, name: string): ExposeMetadata {\n return this.getExposedMetadatas(target).find(metadata => {\n return metadata.options && metadata.options.name === name;\n });\n }\n\n findTypeMetadata(target: Function, propertyName: string): TypeMetadata {\n return this.findMetadata(this._typeMetadatas, target, propertyName);\n }\n\n getStrategy(target: Function): 'excludeAll' | 'exposeAll' | 'none' {\n const excludeMap = this._excludeMetadatas.get(target);\n const exclude = excludeMap && excludeMap.get(undefined);\n const exposeMap = this._exposeMetadatas.get(target);\n const expose = exposeMap && exposeMap.get(undefined);\n if ((exclude && expose) || (!exclude && !expose)) return 'none';\n return exclude ? 'excludeAll' : 'exposeAll';\n }\n\n getExposedMetadatas(target: Function): ExposeMetadata[] {\n return this.getMetadata(this._exposeMetadatas, target);\n }\n\n getExcludedMetadatas(target: Function): ExcludeMetadata[] {\n return this.getMetadata(this._excludeMetadatas, target);\n }\n\n getExposedProperties(target: Function, transformationType: TransformationType): string[] {\n return this.getExposedMetadatas(target)\n .filter(metadata => {\n if (!metadata.options) return true;\n if (metadata.options.toClassOnly === true && metadata.options.toPlainOnly === true) return true;\n\n if (metadata.options.toClassOnly === true) {\n return (\n transformationType === TransformationType.CLASS_TO_CLASS ||\n transformationType === TransformationType.PLAIN_TO_CLASS\n );\n }\n if (metadata.options.toPlainOnly === true) {\n return transformationType === TransformationType.CLASS_TO_PLAIN;\n }\n\n return true;\n })\n .map(metadata => metadata.propertyName);\n }\n\n getExcludedProperties(target: Function, transformationType: TransformationType): string[] {\n return this.getExcludedMetadatas(target)\n .filter(metadata => {\n if (!metadata.options) return true;\n if (metadata.options.toClassOnly === true && metadata.options.toPlainOnly === true) return true;\n\n if (metadata.options.toClassOnly === true) {\n return (\n transformationType === TransformationType.CLASS_TO_CLASS ||\n transformationType === TransformationType.PLAIN_TO_CLASS\n );\n }\n if (metadata.options.toPlainOnly === true) {\n return transformationType === TransformationType.CLASS_TO_PLAIN;\n }\n\n return true;\n })\n .map(metadata => metadata.propertyName);\n }\n\n clear(): void {\n this._typeMetadatas.clear();\n this._exposeMetadatas.clear();\n this._excludeMetadatas.clear();\n this._ancestorsMap.clear();\n }\n\n // -------------------------------------------------------------------------\n // Private Methods\n // -------------------------------------------------------------------------\n\n private getMetadata<T extends { target: Function; propertyName: string }>(\n metadatas: Map<Function, Map<string, T>>,\n target: Function\n ): T[] {\n const metadataFromTargetMap = metadatas.get(target);\n let metadataFromTarget: T[];\n if (metadataFromTargetMap) {\n metadataFromTarget = Array.from(metadataFromTargetMap.values()).filter(meta => meta.propertyName !== undefined);\n }\n const metadataFromAncestors: T[] = [];\n for (const ancestor of this.getAncestors(target)) {\n const ancestorMetadataMap = metadatas.get(ancestor);\n if (ancestorMetadataMap) {\n const metadataFromAncestor = Array.from(ancestorMetadataMap.values()).filter(\n meta => meta.propertyName !== undefined\n );\n metadataFromAncestors.push(...metadataFromAncestor);\n }\n }\n return metadataFromAncestors.concat(metadataFromTarget || []);\n }\n\n private findMetadata<T extends { target: Function; propertyName: string }>(\n metadatas: Map<Function, Map<string, T>>,\n target: Function,\n propertyName: string\n ): T {\n const metadataFromTargetMap = metadatas.get(target);\n if (metadataFromTargetMap) {\n const metadataFromTarget = metadataFromTargetMap.get(propertyName);\n if (metadataFromTarget) {\n return metadataFromTarget;\n }\n }\n for (const ancestor of this.getAncestors(target)) {\n const ancestorMetadataMap = metadatas.get(ancestor);\n if (ancestorMetadataMap) {\n const ancestorResult = ancestorMetadataMap.get(propertyName);\n if (ancestorResult) {\n return ancestorResult;\n }\n }\n }\n return undefined;\n }\n\n private findMetadatas<T extends { target: Function; propertyName: string }>(\n metadatas: Map<Function, Map<string, T[]>>,\n target: Function,\n propertyName: string\n ): T[] {\n const metadataFromTargetMap = metadatas.get(target);\n let metadataFromTarget: T[];\n if (metadataFromTargetMap) {\n metadataFromTarget = metadataFromTargetMap.get(propertyName);\n }\n const metadataFromAncestorsTarget: T[] = [];\n for (const ancestor of this.getAncestors(target)) {\n const ancestorMetadataMap = metadatas.get(ancestor);\n if (ancestorMetadataMap) {\n if (ancestorMetadataMap.has(propertyName)) {\n metadataFromAncestorsTarget.push(...ancestorMetadataMap.get(propertyName));\n }\n }\n }\n return metadataFromAncestorsTarget\n .slice()\n .reverse()\n .concat((metadataFromTarget || []).slice().reverse());\n }\n\n private getAncestors(target: Function): Function[] {\n if (!target) return [];\n if (!this._ancestorsMap.has(target)) {\n const ancestors: Function[] = [];\n for (\n let baseClass = Object.getPrototypeOf(target.prototype.constructor);\n typeof baseClass.prototype !== 'undefined';\n baseClass = Object.getPrototypeOf(baseClass.prototype.constructor)\n ) {\n ancestors.push(baseClass);\n }\n this._ancestorsMap.set(target, ancestors);\n }\n return this._ancestorsMap.get(target);\n }\n}\n"]} |