@metadev/essential-core
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Core SDK Metamodeling Framework. Essential
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ModelElement, Error definitions\r\n\r\nexport enum ErrorType {\r\n None = 0,\r\n Info = 1,\r\n Warning = 2,\r\n Error = 3\r\n}\r\nexport interface Location {\r\n filename: string;\r\n start: Position;\r\n end: Position;\r\n}\r\nexport interface Position {\r\n line: number;\r\n col: number;\r\n}\r\n\r\nexport interface IError {\r\n message: string;\r\n element?: ModelElement;\r\n type: ErrorType;\r\n location: Location;\r\n}\r\nexport enum VisitMode {\r\n PreOrder = 0,\r\n PostOrder = 1\r\n}\r\nexport interface MetaInfo {\r\n id: string;\r\n model?: Model;\r\n parent?: ModelElement;\r\n location?: Location;\r\n}\r\nexport interface ModelElement {\r\n _meta: MetaInfo;\r\n\r\n getId(): string;\r\n getTypeName(): string;\r\n toString(): string;\r\n toJson(): string;\r\n toEssential(): string;\r\n validate(): IError[];\r\n visit(visitMode: VisitMode, action: (el: ModelElement) => void): void;\r\n\r\n // equality. to be overrided\r\n identity(): unknown;\r\n hashCodeElement(): number;\r\n\r\n // equality. generic\r\n hashCode(): number;\r\n sameConcept(b: ModelElement | null | undefined): boolean;\r\n equals(b: ModelElement): boolean;\r\n\r\n // mergeWith(b: ModelElement): void;\r\n // diffWith(b: ModelElement): Difference[];\r\n}\r\n\r\nexport interface Model extends ModelElement {\r\n modelName: string;\r\n version: string;\r\n}\r\n","import { ModelElement, Model, VisitMode } from './modelElement';\r\n\r\nexport class Essential {\r\n static load(fileName: string, callback: () => void) {\r\n callback();\r\n }\r\n static save(model: Model, fileName: string, callback: () => void): void {\r\n callback();\r\n }\r\n\r\n /**\r\n * Fast hashcode function for strings\r\n */\r\n static getHashCode(input: string): number {\r\n if (input === null || input === undefined) {\r\n return 0;\r\n }\r\n let hash = 0;\r\n let i = 0;\r\n const len = input.length;\r\n while (i < len) {\r\n hash = ((hash << 5) - hash + input.charCodeAt(i++)) << 0;\r\n }\r\n return hash;\r\n }\r\n\r\n static isModelElement(obj: unknown): obj is ModelElement {\r\n if (!obj) {\r\n return false;\r\n }\r\n if (!(typeof obj === <string>'object')) {\r\n return false;\r\n }\r\n // todo (check ModelElement with duck typing)\r\n if ((obj as unknown[]).length >= 0) {\r\n return false;\r\n } // collection\r\n return Object.prototype.hasOwnProperty.call(obj, '_meta');\r\n }\r\n static isModelElementCollection(obj: unknown): obj is ModelElement[] {\r\n if (!obj) {\r\n return false;\r\n }\r\n if (!(typeof obj === <string>'object')) {\r\n return false;\r\n }\r\n if (Object.prototype.hasOwnProperty.call(obj, 'length')) {\r\n const arr = obj as unknown[];\r\n if (arr.length > 0 && arr[0]) {\r\n const first = arr[0];\r\n return Essential.isModelElement(first);\r\n }\r\n return true; // Empty array []\r\n }\r\n return false; // Not an array\r\n }\r\n static asModelElement(obj: unknown): ModelElement | null {\r\n if (Essential.isModelElement(obj)) {\r\n return <ModelElement>obj;\r\n }\r\n return null;\r\n }\r\n static asModelElementCollection(obj: unknown): ModelElement[] | null {\r\n if (Essential.isModelElementCollection(obj)) {\r\n return <ModelElement[]>obj;\r\n }\r\n return null;\r\n }\r\n\r\n static collectionToJson(col: ModelElement[]): string {\r\n if (!col) {\r\n return 'null';\r\n }\r\n const str = col.map((it: ModelElement) => {\r\n return it.toJson();\r\n });\r\n if (str.length === 0) {\r\n return '[]';\r\n }\r\n const res = str.reduce((t1, t2) => {\r\n return t1 + ',' + t2;\r\n });\r\n return '[' + res + ']';\r\n }\r\n\r\n static toEssential(m: ModelElement): string {\r\n let res = '';\r\n if (!m) {\r\n return '';\r\n }\r\n m.visit(VisitMode.PreOrder, (it) => {\r\n res += it.toEssential();\r\n });\r\n return res;\r\n }\r\n static refToEssential(me: ModelElement): string {\r\n return me.getId();\r\n }\r\n static collectionToEssential(col: ModelElement[]): string {\r\n if (!col || col.length === 0) {\r\n return '[]';\r\n }\r\n const strs = col.map((it) => {\r\n return Essential.refToEssential(it);\r\n });\r\n const res = strs.reduce((t1, t2) => {\r\n return t1 + ', ' + t2;\r\n });\r\n return '[' + res + ']';\r\n }\r\n static primitiveTypeToEssential(value: unknown): string | null {\r\n if (!value) {\r\n return null;\r\n }\r\n if (value === true) {\r\n return 'true';\r\n }\r\n if (value === false) {\r\n return 'false';\r\n }\r\n if (typeof value === 'number') {\r\n return value.toString();\r\n }\r\n return '\"' + value.toString() + '\"';\r\n }\r\n}\r\n"]}