@angular/core
Version:
Angular - the core framework
304 lines • 41.7 kB
JavaScript
/**
* @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 * as tslib_1 from "tslib";
import { stringify } from '../util/stringify';
import { resolveForwardRef } from './forward_ref';
import { INJECTOR, NG_TEMP_TOKEN_PATH, NullInjector, THROW_IF_NOT_FOUND, USE_VALUE, catchInjectorError, formatError, ɵɵinject } from './injector_compatibility';
import { ɵɵdefineInjectable } from './interface/defs';
import { InjectFlags } from './interface/injector';
import { Inject, Optional, Self, SkipSelf } from './metadata';
import { createInjector } from './r3_injector';
export function INJECTOR_IMPL__PRE_R3__(providers, parent, name) {
return new StaticInjector(providers, parent, name);
}
export function INJECTOR_IMPL__POST_R3__(providers, parent, name) {
return createInjector({ name: name }, parent, providers, name);
}
export var INJECTOR_IMPL = INJECTOR_IMPL__PRE_R3__;
/**
* Concrete injectors implement this interface.
*
* For more details, see the ["Dependency Injection Guide"](guide/dependency-injection).
*
* @usageNotes
* ### Example
*
* {@example core/di/ts/injector_spec.ts region='Injector'}
*
* `Injector` returns itself when given `Injector` as a token:
*
* {@example core/di/ts/injector_spec.ts region='injectInjector'}
*
* @publicApi
*/
var Injector = /** @class */ (function () {
function Injector() {
}
/**
* Create a new Injector which is configure using `StaticProvider`s.
*
* @usageNotes
* ### Example
*
* {@example core/di/ts/provider_spec.ts region='ConstructorProvider'}
*/
Injector.create = function (options, parent) {
if (Array.isArray(options)) {
return INJECTOR_IMPL(options, parent, '');
}
else {
return INJECTOR_IMPL(options.providers, options.parent, options.name || '');
}
};
Injector.THROW_IF_NOT_FOUND = THROW_IF_NOT_FOUND;
Injector.NULL = new NullInjector();
/** @nocollapse */
Injector.ngInjectableDef = ɵɵdefineInjectable({
token: Injector,
providedIn: 'any',
factory: function () { return ɵɵinject(INJECTOR); },
});
/**
* @internal
* @nocollapse
*/
Injector.__NG_ELEMENT_ID__ = -1;
return Injector;
}());
export { Injector };
var IDENT = function (value) {
return value;
};
var ɵ0 = IDENT;
var EMPTY = [];
var CIRCULAR = IDENT;
var MULTI_PROVIDER_FN = function () {
return Array.prototype.slice.call(arguments);
};
var ɵ1 = MULTI_PROVIDER_FN;
var NO_NEW_LINE = 'ɵ';
var StaticInjector = /** @class */ (function () {
function StaticInjector(providers, parent, source) {
if (parent === void 0) { parent = Injector.NULL; }
if (source === void 0) { source = null; }
this.parent = parent;
this.source = source;
var records = this._records = new Map();
records.set(Injector, { token: Injector, fn: IDENT, deps: EMPTY, value: this, useNew: false });
records.set(INJECTOR, { token: INJECTOR, fn: IDENT, deps: EMPTY, value: this, useNew: false });
recursivelyProcessProviders(records, providers);
}
StaticInjector.prototype.get = function (token, notFoundValue, flags) {
if (flags === void 0) { flags = InjectFlags.Default; }
var record = this._records.get(token);
try {
return tryResolveToken(token, record, this._records, this.parent, notFoundValue, flags);
}
catch (e) {
return catchInjectorError(e, token, 'StaticInjectorError', this.source);
}
};
StaticInjector.prototype.toString = function () {
var tokens = [], records = this._records;
records.forEach(function (v, token) { return tokens.push(stringify(token)); });
return "StaticInjector[" + tokens.join(', ') + "]";
};
return StaticInjector;
}());
export { StaticInjector };
function resolveProvider(provider) {
var deps = computeDeps(provider);
var fn = IDENT;
var value = EMPTY;
var useNew = false;
var provide = resolveForwardRef(provider.provide);
if (USE_VALUE in provider) {
// We need to use USE_VALUE in provider since provider.useValue could be defined as undefined.
value = provider.useValue;
}
else if (provider.useFactory) {
fn = provider.useFactory;
}
else if (provider.useExisting) {
// Just use IDENT
}
else if (provider.useClass) {
useNew = true;
fn = resolveForwardRef(provider.useClass);
}
else if (typeof provide == 'function') {
useNew = true;
fn = provide;
}
else {
throw staticError('StaticProvider does not have [useValue|useFactory|useExisting|useClass] or [provide] is not newable', provider);
}
return { deps: deps, fn: fn, useNew: useNew, value: value };
}
function multiProviderMixError(token) {
return staticError('Cannot mix multi providers and regular providers', token);
}
function recursivelyProcessProviders(records, provider) {
if (provider) {
provider = resolveForwardRef(provider);
if (provider instanceof Array) {
// if we have an array recurse into the array
for (var i = 0; i < provider.length; i++) {
recursivelyProcessProviders(records, provider[i]);
}
}
else if (typeof provider === 'function') {
// Functions were supported in ReflectiveInjector, but are not here. For safety give useful
// error messages
throw staticError('Function/Class not supported', provider);
}
else if (provider && typeof provider === 'object' && provider.provide) {
// At this point we have what looks like a provider: {provide: ?, ....}
var token = resolveForwardRef(provider.provide);
var resolvedProvider = resolveProvider(provider);
if (provider.multi === true) {
// This is a multi provider.
var multiProvider = records.get(token);
if (multiProvider) {
if (multiProvider.fn !== MULTI_PROVIDER_FN) {
throw multiProviderMixError(token);
}
}
else {
// Create a placeholder factory which will look up the constituents of the multi provider.
records.set(token, multiProvider = {
token: provider.provide,
deps: [],
useNew: false,
fn: MULTI_PROVIDER_FN,
value: EMPTY
});
}
// Treat the provider as the token.
token = provider;
multiProvider.deps.push({ token: token, options: 6 /* Default */ });
}
var record = records.get(token);
if (record && record.fn == MULTI_PROVIDER_FN) {
throw multiProviderMixError(token);
}
records.set(token, resolvedProvider);
}
else {
throw staticError('Unexpected provider', provider);
}
}
}
function tryResolveToken(token, record, records, parent, notFoundValue, flags) {
try {
return resolveToken(token, record, records, parent, notFoundValue, flags);
}
catch (e) {
// ensure that 'e' is of type Error.
if (!(e instanceof Error)) {
e = new Error(e);
}
var path = e[NG_TEMP_TOKEN_PATH] = e[NG_TEMP_TOKEN_PATH] || [];
path.unshift(token);
if (record && record.value == CIRCULAR) {
// Reset the Circular flag.
record.value = EMPTY;
}
throw e;
}
}
function resolveToken(token, record, records, parent, notFoundValue, flags) {
var _a;
var value;
if (record && !(flags & InjectFlags.SkipSelf)) {
// If we don't have a record, this implies that we don't own the provider hence don't know how
// to resolve it.
value = record.value;
if (value == CIRCULAR) {
throw Error(NO_NEW_LINE + 'Circular dependency');
}
else if (value === EMPTY) {
record.value = CIRCULAR;
var obj = undefined;
var useNew = record.useNew;
var fn = record.fn;
var depRecords = record.deps;
var deps = EMPTY;
if (depRecords.length) {
deps = [];
for (var i = 0; i < depRecords.length; i++) {
var depRecord = depRecords[i];
var options = depRecord.options;
var childRecord = options & 2 /* CheckSelf */ ? records.get(depRecord.token) : undefined;
deps.push(tryResolveToken(
// Current Token to resolve
depRecord.token,
// A record which describes how to resolve the token.
// If undefined, this means we don't have such a record
childRecord,
// Other records we know about.
records,
// If we don't know how to resolve dependency and we should not check parent for it,
// than pass in Null injector.
!childRecord && !(options & 4 /* CheckParent */) ? Injector.NULL : parent, options & 1 /* Optional */ ? null : Injector.THROW_IF_NOT_FOUND, InjectFlags.Default));
}
}
record.value = value = useNew ? new ((_a = fn).bind.apply(_a, tslib_1.__spread([void 0], deps)))() : fn.apply(obj, deps);
}
}
else if (!(flags & InjectFlags.Self)) {
value = parent.get(token, notFoundValue, InjectFlags.Default);
}
return value;
}
function computeDeps(provider) {
var deps = EMPTY;
var providerDeps = provider.deps;
if (providerDeps && providerDeps.length) {
deps = [];
for (var i = 0; i < providerDeps.length; i++) {
var options = 6 /* Default */;
var token = resolveForwardRef(providerDeps[i]);
if (token instanceof Array) {
for (var j = 0, annotations = token; j < annotations.length; j++) {
var annotation = annotations[j];
if (annotation instanceof Optional || annotation == Optional) {
options = options | 1 /* Optional */;
}
else if (annotation instanceof SkipSelf || annotation == SkipSelf) {
options = options & ~2 /* CheckSelf */;
}
else if (annotation instanceof Self || annotation == Self) {
options = options & ~4 /* CheckParent */;
}
else if (annotation instanceof Inject) {
token = annotation.token;
}
else {
token = resolveForwardRef(annotation);
}
}
}
deps.push({ token: token, options: options });
}
}
else if (provider.useExisting) {
var token = resolveForwardRef(provider.useExisting);
deps = [{ token: token, options: 6 /* Default */ }];
}
else if (!providerDeps && !(USE_VALUE in provider)) {
// useValue & useExisting are the only ones which are exempt from deps all others need it.
throw staticError('\'deps\' required', provider);
}
return deps;
}
function staticError(text, obj) {
return new Error(formatError(text, obj, 'StaticInjectorError'));
}
export { ɵ0, ɵ1 };
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* @license\n * Copyright Google Inc. 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 {stringify} from '../util/stringify';\n\nimport {resolveForwardRef} from './forward_ref';\nimport {InjectionToken} from './injection_token';\nimport {INJECTOR, NG_TEMP_TOKEN_PATH, NullInjector, THROW_IF_NOT_FOUND, USE_VALUE, catchInjectorError, formatError, ɵɵinject} from './injector_compatibility';\nimport {ɵɵdefineInjectable} from './interface/defs';\nimport {InjectFlags} from './interface/injector';\nimport {ConstructorProvider, ExistingProvider, FactoryProvider, StaticClassProvider, StaticProvider, ValueProvider} from './interface/provider';\nimport {Inject, Optional, Self, SkipSelf} from './metadata';\nimport {createInjector} from './r3_injector';\n\nexport function INJECTOR_IMPL__PRE_R3__(\n    providers: StaticProvider[], parent: Injector | undefined, name: string) {\n  return new StaticInjector(providers, parent, name);\n}\n\nexport function INJECTOR_IMPL__POST_R3__(\n    providers: StaticProvider[], parent: Injector | undefined, name: string) {\n  return createInjector({name: name}, parent, providers, name);\n}\n\nexport const INJECTOR_IMPL = INJECTOR_IMPL__PRE_R3__;\n\n/**\n * Concrete injectors implement this interface.\n *\n * For more details, see the [\"Dependency Injection Guide\"](guide/dependency-injection).\n *\n * @usageNotes\n * ### Example\n *\n * {@example core/di/ts/injector_spec.ts region='Injector'}\n *\n * `Injector` returns itself when given `Injector` as a token:\n *\n * {@example core/di/ts/injector_spec.ts region='injectInjector'}\n *\n * @publicApi\n */\nexport abstract class Injector {\n  static THROW_IF_NOT_FOUND = THROW_IF_NOT_FOUND;\n  static NULL: Injector = new NullInjector();\n\n  /**\n   * Retrieves an instance from the injector based on the provided token.\n   * @returns The instance from the injector if defined, otherwise the `notFoundValue`.\n   * @throws When the `notFoundValue` is `undefined` or `Injector.THROW_IF_NOT_FOUND`.\n   */\n  abstract get<T>(token: Type<T>|InjectionToken<T>, notFoundValue?: T, flags?: InjectFlags): T;\n  /**\n   * @deprecated from v4.0.0 use Type<T> or InjectionToken<T>\n   * @suppress {duplicate}\n   */\n  abstract get(token: any, notFoundValue?: any): any;\n\n  /**\n   * @deprecated from v5 use the new signature Injector.create(options)\n   */\n  static create(providers: StaticProvider[], parent?: Injector): Injector;\n\n  static create(options: {providers: StaticProvider[], parent?: Injector, name?: string}): Injector;\n\n  /**\n   * Create a new Injector which is configure using `StaticProvider`s.\n   *\n   * @usageNotes\n   * ### Example\n   *\n   * {@example core/di/ts/provider_spec.ts region='ConstructorProvider'}\n   */\n  static create(\n      options: StaticProvider[]|{providers: StaticProvider[], parent?: Injector, name?: string},\n      parent?: Injector): Injector {\n    if (Array.isArray(options)) {\n      return INJECTOR_IMPL(options, parent, '');\n    } else {\n      return INJECTOR_IMPL(options.providers, options.parent, options.name || '');\n    }\n  }\n\n  /** @nocollapse */\n  static ngInjectableDef = ɵɵdefineInjectable({\n    token: Injector,\n    providedIn: 'any' as any,\n    factory: () => ɵɵinject(INJECTOR),\n  });\n\n  /**\n   * @internal\n   * @nocollapse\n   */\n  static __NG_ELEMENT_ID__ = -1;\n}\n\n\n\nconst IDENT = function<T>(value: T): T {\n  return value;\n};\nconst EMPTY = <any[]>[];\nconst CIRCULAR = IDENT;\nconst MULTI_PROVIDER_FN = function(): any[] {\n  return Array.prototype.slice.call(arguments);\n};\n\nconst enum OptionFlags {\n  Optional = 1 << 0,\n  CheckSelf = 1 << 1,\n  CheckParent = 1 << 2,\n  Default = CheckSelf | CheckParent\n}\nconst NO_NEW_LINE = 'ɵ';\n\nexport class StaticInjector implements Injector {\n  readonly parent: Injector;\n  readonly source: string|null;\n\n  private _records: Map<any, Record>;\n\n  constructor(\n      providers: StaticProvider[], parent: Injector = Injector.NULL, source: string|null = null) {\n    this.parent = parent;\n    this.source = source;\n    const records = this._records = new Map<any, Record>();\n    records.set(\n        Injector, <Record>{token: Injector, fn: IDENT, deps: EMPTY, value: this, useNew: false});\n    records.set(\n        INJECTOR, <Record>{token: INJECTOR, fn: IDENT, deps: EMPTY, value: this, useNew: false});\n    recursivelyProcessProviders(records, providers);\n  }\n\n  get<T>(token: Type<T>|InjectionToken<T>, notFoundValue?: T, flags?: InjectFlags): T;\n  get(token: any, notFoundValue?: any): any;\n  get(token: any, notFoundValue?: any, flags: InjectFlags = InjectFlags.Default): any {\n    const record = this._records.get(token);\n    try {\n      return tryResolveToken(token, record, this._records, this.parent, notFoundValue, flags);\n    } catch (e) {\n      return catchInjectorError(e, token, 'StaticInjectorError', this.source);\n    }\n  }\n\n  toString() {\n    const tokens = <string[]>[], records = this._records;\n    records.forEach((v, token) => tokens.push(stringify(token)));\n    return `StaticInjector[${tokens.join(', ')}]`;\n  }\n}\n\ntype SupportedProvider =\n    ValueProvider | ExistingProvider | StaticClassProvider | ConstructorProvider | FactoryProvider;\n\ninterface Record {\n  fn: Function;\n  useNew: boolean;\n  deps: DependencyRecord[];\n  value: any;\n}\n\ninterface DependencyRecord {\n  token: any;\n  options: number;\n}\n\nfunction resolveProvider(provider: SupportedProvider): Record {\n  const deps = computeDeps(provider);\n  let fn: Function = IDENT;\n  let value: any = EMPTY;\n  let useNew: boolean = false;\n  let provide = resolveForwardRef(provider.provide);\n  if (USE_VALUE in provider) {\n    // We need to use USE_VALUE in provider since provider.useValue could be defined as undefined.\n    value = (provider as ValueProvider).useValue;\n  } else if ((provider as FactoryProvider).useFactory) {\n    fn = (provider as FactoryProvider).useFactory;\n  } else if ((provider as ExistingProvider).useExisting) {\n    // Just use IDENT\n  } else if ((provider as StaticClassProvider).useClass) {\n    useNew = true;\n    fn = resolveForwardRef((provider as StaticClassProvider).useClass);\n  } else if (typeof provide == 'function') {\n    useNew = true;\n    fn = provide;\n  } else {\n    throw staticError(\n        'StaticProvider does not have [useValue|useFactory|useExisting|useClass] or [provide] is not newable',\n        provider);\n  }\n  return {deps, fn, useNew, value};\n}\n\nfunction multiProviderMixError(token: any) {\n  return staticError('Cannot mix multi providers and regular providers', token);\n}\n\nfunction recursivelyProcessProviders(records: Map<any, Record>, provider: StaticProvider) {\n  if (provider) {\n    provider = resolveForwardRef(provider);\n    if (provider instanceof Array) {\n      // if we have an array recurse into the array\n      for (let i = 0; i < provider.length; i++) {\n        recursivelyProcessProviders(records, provider[i]);\n      }\n    } else if (typeof provider === 'function') {\n      // Functions were supported in ReflectiveInjector, but are not here. For safety give useful\n      // error messages\n      throw staticError('Function/Class not supported', provider);\n    } else if (provider && typeof provider === 'object' && provider.provide) {\n      // At this point we have what looks like a provider: {provide: ?, ....}\n      let token = resolveForwardRef(provider.provide);\n      const resolvedProvider = resolveProvider(provider);\n      if (provider.multi === true) {\n        // This is a multi provider.\n        let multiProvider: Record|undefined = records.get(token);\n        if (multiProvider) {\n          if (multiProvider.fn !== MULTI_PROVIDER_FN) {\n            throw multiProviderMixError(token);\n          }\n        } else {\n          // Create a placeholder factory which will look up the constituents of the multi provider.\n          records.set(token, multiProvider = <Record>{\n            token: provider.provide,\n            deps: [],\n            useNew: false,\n            fn: MULTI_PROVIDER_FN,\n            value: EMPTY\n          });\n        }\n        // Treat the provider as the token.\n        token = provider;\n        multiProvider.deps.push({token, options: OptionFlags.Default});\n      }\n      const record = records.get(token);\n      if (record && record.fn == MULTI_PROVIDER_FN) {\n        throw multiProviderMixError(token);\n      }\n      records.set(token, resolvedProvider);\n    } else {\n      throw staticError('Unexpected provider', provider);\n    }\n  }\n}\n\nfunction tryResolveToken(\n    token: any, record: Record | undefined, records: Map<any, Record>, parent: Injector,\n    notFoundValue: any, flags: InjectFlags): any {\n  try {\n    return resolveToken(token, record, records, parent, notFoundValue, flags);\n  } catch (e) {\n    // ensure that 'e' is of type Error.\n    if (!(e instanceof Error)) {\n      e = new Error(e);\n    }\n    const path: any[] = e[NG_TEMP_TOKEN_PATH] = e[NG_TEMP_TOKEN_PATH] || [];\n    path.unshift(token);\n    if (record && record.value == CIRCULAR) {\n      // Reset the Circular flag.\n      record.value = EMPTY;\n    }\n    throw e;\n  }\n}\n\nfunction resolveToken(\n    token: any, record: Record | undefined, records: Map<any, Record>, parent: Injector,\n    notFoundValue: any, flags: InjectFlags): any {\n  let value;\n  if (record && !(flags & InjectFlags.SkipSelf)) {\n    // If we don't have a record, this implies that we don't own the provider hence don't know how\n    // to resolve it.\n    value = record.value;\n    if (value == CIRCULAR) {\n      throw Error(NO_NEW_LINE + 'Circular dependency');\n    } else if (value === EMPTY) {\n      record.value = CIRCULAR;\n      let obj = undefined;\n      let useNew = record.useNew;\n      let fn = record.fn;\n      let depRecords = record.deps;\n      let deps = EMPTY;\n      if (depRecords.length) {\n        deps = [];\n        for (let i = 0; i < depRecords.length; i++) {\n          const depRecord: DependencyRecord = depRecords[i];\n          const options = depRecord.options;\n          const childRecord =\n              options & OptionFlags.CheckSelf ? records.get(depRecord.token) : undefined;\n          deps.push(tryResolveToken(\n              // Current Token to resolve\n              depRecord.token,\n              // A record which describes how to resolve the token.\n              // If undefined, this means we don't have such a record\n              childRecord,\n              // Other records we know about.\n              records,\n              // If we don't know how to resolve dependency and we should not check parent for it,\n              // than pass in Null injector.\n              !childRecord && !(options & OptionFlags.CheckParent) ? Injector.NULL : parent,\n              options & OptionFlags.Optional ? null : Injector.THROW_IF_NOT_FOUND,\n              InjectFlags.Default));\n        }\n      }\n      record.value = value = useNew ? new (fn as any)(...deps) : fn.apply(obj, deps);\n    }\n  } else if (!(flags & InjectFlags.Self)) {\n    value = parent.get(token, notFoundValue, InjectFlags.Default);\n  }\n  return value;\n}\n\nfunction computeDeps(provider: StaticProvider): DependencyRecord[] {\n  let deps: DependencyRecord[] = EMPTY;\n  const providerDeps: any[] =\n      (provider as ExistingProvider & StaticClassProvider & ConstructorProvider).deps;\n  if (providerDeps && providerDeps.length) {\n    deps = [];\n    for (let i = 0; i < providerDeps.length; i++) {\n      let options = OptionFlags.Default;\n      let token = resolveForwardRef(providerDeps[i]);\n      if (token instanceof Array) {\n        for (let j = 0, annotations = token; j < annotations.length; j++) {\n          const annotation = annotations[j];\n          if (annotation instanceof Optional || annotation == Optional) {\n            options = options | OptionFlags.Optional;\n          } else if (annotation instanceof SkipSelf || annotation == SkipSelf) {\n            options = options & ~OptionFlags.CheckSelf;\n          } else if (annotation instanceof Self || annotation == Self) {\n            options = options & ~OptionFlags.CheckParent;\n          } else if (annotation instanceof Inject) {\n            token = (annotation as Inject).token;\n          } else {\n            token = resolveForwardRef(annotation);\n          }\n        }\n      }\n      deps.push({token, options});\n    }\n  } else if ((provider as ExistingProvider).useExisting) {\n    const token = resolveForwardRef((provider as ExistingProvider).useExisting);\n    deps = [{token, options: OptionFlags.Default}];\n  } else if (!providerDeps && !(USE_VALUE in provider)) {\n    // useValue & useExisting are the only ones which are exempt from deps all others need it.\n    throw staticError('\\'deps\\' required', provider);\n  }\n  return deps;\n}\n\nfunction staticError(text: string, obj: any): Error {\n  return new Error(formatError(text, obj, 'StaticInjectorError'));\n}\n"]}