@angular/core/esm2015/src/di/interface/defs.js

Angular - the core framework

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { getClosureSafeProperty } from '../../util/property';
/**
 * Construct an `InjectableDef` which defines how a token will be constructed by the DI system, and
 * in which injectors (if any) it will be available.
 *
 * This should be assigned to a static `ngInjectableDef` field on a type, which will then be an
 * `InjectableType`.
 *
 * Options:
 * * `providedIn` determines which injectors will include the injectable, by either associating it
 *   with an `@NgModule` or other `InjectorType`, or by specifying that this injectable should be
 *   provided in the `'root'` injector, which will be the application-level injector in most apps.
 * * `factory` gives the zero argument function which will create an instance of the injectable.
 *   The factory can call `inject` to access the `Injector` and request injection of dependencies.
 *
 * @codeGenApi
 */
export function ɵɵdefineInjectable(opts) {
    return {
        token: opts.token, providedIn: opts.providedIn || null, factory: opts.factory,
        value: undefined,
    };
}
/**
 * @deprecated in v8, delete after v10. This API should be used only be generated code, and that
 * code should now use ɵɵdefineInjectable instead.
 * @publicApi
 */
export const defineInjectable = ɵɵdefineInjectable;
/**
 * Construct an `InjectorDef` which configures an injector.
 *
 * This should be assigned to a static `ngInjectorDef` field on a type, which will then be an
 * `InjectorType`.
 *
 * Options:
 *
 * * `factory`: an `InjectorType` is an instantiable type, so a zero argument `factory` function to
 *   create the type must be provided. If that factory function needs to inject arguments, it can
 *   use the `inject` function.
 * * `providers`: an optional array of providers to add to the injector. Each provider must
 *   either have a factory or point to a type which has an `ngInjectableDef` static property (the
 *   type must be an `InjectableType`).
 * * `imports`: an optional array of imports of other `InjectorType`s or `InjectorTypeWithModule`s
 *   whose providers will also be added to the injector. Locally provided types will override
 *   providers from imports.
 *
 * @publicApi
 */
export function ɵɵdefineInjector(options) {
    return {
        factory: options.factory, providers: options.providers || [], imports: options.imports || [],
    };
}
/**
 * Read the `ngInjectableDef` for `type` in a way which is immune to accidentally reading inherited
 * value.
 *
 * @param type A type which may have its own (non-inherited) `ngInjectableDef`.
 */
export function getInjectableDef(type) {
    const def = type[NG_INJECTABLE_DEF];
    // The definition read above may come from a base class. `hasOwnProperty` is not sufficient to
    // distinguish this case, as in older browsers (e.g. IE10) static property inheritance is
    // implemented by copying the properties.
    //
    // Instead, the ngInjectableDef's token is compared to the type, and if they don't match then the
    // property was not defined directly on the type itself, and was likely inherited. The definition
    // is only returned if the type matches the def.token.
    return def && def.token === type ? def : null;
}
/**
 * Read the `ngInjectableDef` for `type` or read the `ngInjectableDef` from one of its ancestors.
 *
 * @param type A type which may have `ngInjectableDef`, via inheritance.
 *
 * @deprecated Will be removed in v10, where an error will occur in the scenario if we find the
 * `ngInjectableDef` on an ancestor only.
 */
export function getInheritedInjectableDef(type) {
    if (type && type[NG_INJECTABLE_DEF]) {
        // TODO(FW-1307): Re-add ngDevMode when closure can handle it
        // ngDevMode &&
        console.warn(`DEPRECATED: DI is instantiating a token "${type.name}" that inherits its @Injectable decorator but does not provide one itself.\n` +
            `This will become an error in v10. Please add @Injectable() to the "${type.name}" class.`);
        return type[NG_INJECTABLE_DEF];
    }
    else {
        return null;
    }
}
/**
 * Read the `ngInjectorDef` type in a way which is immune to accidentally reading inherited value.
 *
 * @param type type which may have `ngInjectorDef`
 */
export function getInjectorDef(type) {
    return type && type.hasOwnProperty(NG_INJECTOR_DEF) ? type[NG_INJECTOR_DEF] : null;
}
export const NG_INJECTABLE_DEF = getClosureSafeProperty({ ngInjectableDef: getClosureSafeProperty });
export const NG_INJECTOR_DEF = getClosureSafeProperty({ ngInjectorDef: getClosureSafeProperty });
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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Type} from '../../interface/type';\nimport {getClosureSafeProperty} from '../../util/property';\nimport {ClassProvider, ConstructorProvider, ExistingProvider, FactoryProvider, StaticClassProvider, ValueProvider} from './provider';\n\n\n\n/**\n * Information about how a type or `InjectionToken` interfaces with the DI system.\n *\n * At a minimum, this includes a `factory` which defines how to create the given type `T`, possibly\n * requesting injection of other types if necessary.\n *\n * Optionally, a `providedIn` parameter specifies that the given type belongs to a particular\n * `InjectorDef`, `NgModule`, or a special scope (e.g. `'root'`). A value of `null` indicates\n * that the injectable does not belong to any scope.\n *\n * NOTE: This is a private type and should not be exported\n *\n * @publicApi\n */\nexport interface ɵɵInjectableDef<T> {\n  /**\n   * Specifies that the given type belongs to a particular injector:\n   * - `InjectorType` such as `NgModule`,\n   * - `'root'` the root injector\n   * - `'any'` all injectors.\n   * - `null`, does not belong to any injector. Must be explicitly listed in the injector\n   *   `providers`.\n   */\n  providedIn: InjectorType<any>|'root'|'any'|null;\n\n  /**\n   * The token to which this definition belongs.\n   *\n   * Note that this may not be the same as the type that the `factory` will create.\n   */\n  token: unknown;\n\n  /**\n   * Factory method to execute to create an instance of the injectable.\n   */\n  factory: (t?: Type<any>) => T;\n\n  /**\n   * In a case of no explicit injector, a location where the instance of the injectable is stored.\n   */\n  value: T|undefined;\n}\n\n/**\n * Information about the providers to be included in an `Injector` as well as how the given type\n * which carries the information should be created by the DI system.\n *\n * An `InjectorDef` can import other types which have `InjectorDefs`, forming a deep nested\n * structure of providers with a defined priority (identically to how `NgModule`s also have\n * an import/dependency structure).\n *\n * NOTE: This is a private type and should not be exported\n *\n * @publicApi\n */\nexport interface ɵɵInjectorDef<T> {\n  factory: () => T;\n\n  // TODO(alxhub): Narrow down the type here once decorators properly change the return type of the\n  // class they are decorating (to add the ngInjectableDef property for example).\n  providers: (Type<any>|ValueProvider|ExistingProvider|FactoryProvider|ConstructorProvider|\n              StaticClassProvider|ClassProvider|any[])[];\n\n  imports: (InjectorType<any>|InjectorTypeWithProviders<any>)[];\n}\n\n/**\n * A `Type` which has an `InjectableDef` static field.\n *\n * `InjectableDefType`s contain their own Dependency Injection metadata and are usable in an\n * `InjectorDef`-based `StaticInjector.\n *\n * @publicApi\n */\nexport interface InjectableType<T> extends Type<T> {\n  /**\n   * Opaque type whose structure is highly version dependent. Do not rely on any properties.\n   */\n  ngInjectableDef: never;\n}\n\n/**\n * A type which has an `InjectorDef` static field.\n *\n * `InjectorDefTypes` can be used to configure a `StaticInjector`.\n *\n * @publicApi\n */\nexport interface InjectorType<T> extends Type<T> {\n  /**\n   * Opaque type whose structure is highly version dependent. Do not rely on any properties.\n   */\n  ngInjectorDef: never;\n}\n\n/**\n * Describes the `InjectorDef` equivalent of a `ModuleWithProviders`, an `InjectorDefType` with an\n * associated array of providers.\n *\n * Objects of this type can be listed in the imports section of an `InjectorDef`.\n *\n * NOTE: This is a private type and should not be exported\n */\nexport interface InjectorTypeWithProviders<T> {\n  ngModule: InjectorType<T>;\n  providers?: (Type<any>|ValueProvider|ExistingProvider|FactoryProvider|ConstructorProvider|\n               StaticClassProvider|ClassProvider|any[])[];\n}\n\n\n/**\n * Construct an `InjectableDef` which defines how a token will be constructed by the DI system, and\n * in which injectors (if any) it will be available.\n *\n * This should be assigned to a static `ngInjectableDef` field on a type, which will then be an\n * `InjectableType`.\n *\n * Options:\n * * `providedIn` determines which injectors will include the injectable, by either associating it\n *   with an `@NgModule` or other `InjectorType`, or by specifying that this injectable should be\n *   provided in the `'root'` injector, which will be the application-level injector in most apps.\n * * `factory` gives the zero argument function which will create an instance of the injectable.\n *   The factory can call `inject` to access the `Injector` and request injection of dependencies.\n *\n * @codeGenApi\n */\nexport function ɵɵdefineInjectable<T>(opts: {\n  token: unknown,\n  providedIn?: Type<any>| 'root' | 'any' | null,\n  factory: () => T,\n}): never {\n  return ({\n    token: opts.token, providedIn: opts.providedIn as any || null, factory: opts.factory,\n        value: undefined,\n  } as ɵɵInjectableDef<T>) as never;\n}\n\n/**\n * @deprecated in v8, delete after v10. This API should be used only be generated code, and that\n * code should now use ɵɵdefineInjectable instead.\n * @publicApi\n */\nexport const defineInjectable = ɵɵdefineInjectable;\n\n/**\n * Construct an `InjectorDef` which configures an injector.\n *\n * This should be assigned to a static `ngInjectorDef` field on a type, which will then be an\n * `InjectorType`.\n *\n * Options:\n *\n * * `factory`: an `InjectorType` is an instantiable type, so a zero argument `factory` function to\n *   create the type must be provided. If that factory function needs to inject arguments, it can\n *   use the `inject` function.\n * * `providers`: an optional array of providers to add to the injector. Each provider must\n *   either have a factory or point to a type which has an `ngInjectableDef` static property (the\n *   type must be an `InjectableType`).\n * * `imports`: an optional array of imports of other `InjectorType`s or `InjectorTypeWithModule`s\n *   whose providers will also be added to the injector. Locally provided types will override\n *   providers from imports.\n *\n * @publicApi\n */\nexport function ɵɵdefineInjector(options: {factory: () => any, providers?: any[], imports?: any[]}):\n    never {\n  return ({\n    factory: options.factory, providers: options.providers || [], imports: options.imports || [],\n  } as ɵɵInjectorDef<any>) as never;\n}\n\n/**\n * Read the `ngInjectableDef` for `type` in a way which is immune to accidentally reading inherited\n * value.\n *\n * @param type A type which may have its own (non-inherited) `ngInjectableDef`.\n */\nexport function getInjectableDef<T>(type: any): ɵɵInjectableDef<T>|null {\n  const def = type[NG_INJECTABLE_DEF] as ɵɵInjectableDef<T>;\n  // The definition read above may come from a base class. `hasOwnProperty` is not sufficient to\n  // distinguish this case, as in older browsers (e.g. IE10) static property inheritance is\n  // implemented by copying the properties.\n  //\n  // Instead, the ngInjectableDef's token is compared to the type, and if they don't match then the\n  // property was not defined directly on the type itself, and was likely inherited. The definition\n  // is only returned if the type matches the def.token.\n  return def && def.token === type ? def : null;\n}\n\n/**\n * Read the `ngInjectableDef` for `type` or read the `ngInjectableDef` from one of its ancestors.\n *\n * @param type A type which may have `ngInjectableDef`, via inheritance.\n *\n * @deprecated Will be removed in v10, where an error will occur in the scenario if we find the\n * `ngInjectableDef` on an ancestor only.\n */\nexport function getInheritedInjectableDef<T>(type: any): ɵɵInjectableDef<T>|null {\n  if (type && type[NG_INJECTABLE_DEF]) {\n    // TODO(FW-1307): Re-add ngDevMode when closure can handle it\n    // ngDevMode &&\n    console.warn(\n        `DEPRECATED: DI is instantiating a token \"${type.name}\" that inherits its @Injectable decorator but does not provide one itself.\\n` +\n        `This will become an error in v10. Please add @Injectable() to the \"${type.name}\" class.`);\n    return type[NG_INJECTABLE_DEF];\n  } else {\n    return null;\n  }\n}\n\n/**\n * Read the `ngInjectorDef` type in a way which is immune to accidentally reading inherited value.\n *\n * @param type type which may have `ngInjectorDef`\n */\nexport function getInjectorDef<T>(type: any): ɵɵInjectorDef<T>|null {\n  return type && type.hasOwnProperty(NG_INJECTOR_DEF) ? (type as any)[NG_INJECTOR_DEF] : null;\n}\n\nexport const NG_INJECTABLE_DEF = getClosureSafeProperty({ngInjectableDef: getClosureSafeProperty});\nexport const NG_INJECTOR_DEF = getClosureSafeProperty({ngInjectorDef: getClosureSafeProperty});\n"]}