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import type { Context, IQueryEngine } from "./rdf.ts";import { QueryEngine } from "./engine/mod.ts";
let defaultContext: Context | undefined = undefined;let defaultEngine: IQueryEngine | undefined = undefined;
export const setDefaultContext = (context: Context) => {  defaultContext = context;};
export const resolveContext = (context?: Context) => {  if (!context && !defaultContext) {    throw new Error(      "No context found. Please create a default context or pass one to createResource function",    );  }  return context || defaultContext!;};
export const setDefaultEngine = (engine: IQueryEngine) => {  defaultEngine = engine;};
export const resolveEngine = (engine?: IQueryEngine) => {  if (!engine && !defaultEngine) {    setDefaultEngine(new QueryEngine());    // TODO: consider the consequences here, maybe log a warning?    /*throw new Error(      "No engine found. Please create a default engine or pass one to createResource function",    );*/  }  return engine || defaultEngine!;};