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@loopback/context

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Facilities to manage artifacts and their dependencies in your Node.js applications. The module exposes TypeScript/JavaScript APIs and decorators to register artifacts, declare dependencies, and resolve artifacts by keys. It also serves as an IoC container

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import { Context } from './context'; import { ResolutionSession } from './resolution-session'; import { BoundValue, Constructor, MapObject, ValueOrPromise } from './value-promise'; /** * Create an instance of a class which constructor has arguments * decorated with `@inject`. * * The function returns a class when all dependencies were * resolved synchronously, or a Promise otherwise. * * @param ctor - The class constructor to call. * @param ctx - The context containing values for `@inject` resolution * @param session - Optional session for binding and dependency resolution * @param nonInjectedArgs - Optional array of args for non-injected parameters */ export declare function instantiateClass<T extends object>(ctor: Constructor<T>, ctx: Context, session?: ResolutionSession, nonInjectedArgs?: any[]): ValueOrPromise<T>; /** * Given a function with arguments decorated with `@inject`, * return the list of arguments resolved using the values * bound in `ctx`. * The function returns an argument array when all dependencies were * resolved synchronously, or a Promise otherwise. * * @param target - The class for constructor injection or prototype for method * injection * @param method - The method name. If set to '', the constructor will * be used. * @param ctx - The context containing values for `@inject` resolution * @param session - Optional session for binding and dependency resolution * @param nonInjectedArgs - Optional array of args for non-injected parameters */ export declare function resolveInjectedArguments(target: object, method: string, ctx: Context, session?: ResolutionSession, nonInjectedArgs?: any[]): ValueOrPromise<BoundValue[]>; /** * Given a class with properties decorated with `@inject`, * return the map of properties resolved using the values * bound in `ctx`. * The function returns an argument array when all dependencies were * resolved synchronously, or a Promise otherwise. * * @param constructor - The class for which properties should be resolved. * @param ctx - The context containing values for `@inject` resolution * @param session - Optional session for binding and dependency resolution */ export declare function resolveInjectedProperties(constructor: Function, ctx: Context, session?: ResolutionSession): ValueOrPromise<MapObject<BoundValue>>;