@angular/core
Version:
Angular - the core framework
88 lines • 12.9 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 { getCompilerFacade } from '../../compiler/compiler_facade';
import { getClosureSafeProperty } from '../../util/property';
import { NG_INJECTABLE_DEF } from '../interface/defs';
import { angularCoreDiEnv } from './environment';
import { convertDependencies, reflectDependencies } from './util';
/**
* Compile an Angular injectable according to its `Injectable` metadata, and patch the resulting
* `ngInjectableDef` onto the injectable type.
*/
export function compileInjectable(type, srcMeta) {
var def = null;
// if NG_INJECTABLE_DEF is already defined on this class then don't overwrite it
if (type.hasOwnProperty(NG_INJECTABLE_DEF))
return;
Object.defineProperty(type, NG_INJECTABLE_DEF, {
get: function () {
if (def === null) {
// Allow the compilation of a class with a `@Injectable()` decorator without parameters
var meta = srcMeta || { providedIn: null };
var hasAProvider = isUseClassProvider(meta) || isUseFactoryProvider(meta) ||
isUseValueProvider(meta) || isUseExistingProvider(meta);
var compilerMeta = {
name: type.name,
type: type,
typeArgumentCount: 0,
providedIn: meta.providedIn,
ctorDeps: reflectDependencies(type),
userDeps: undefined,
};
if ((isUseClassProvider(meta) || isUseFactoryProvider(meta)) && meta.deps !== undefined) {
compilerMeta.userDeps = convertDependencies(meta.deps);
}
if (!hasAProvider) {
// In the case the user specifies a type provider, treat it as {provide: X, useClass: X}.
// The deps will have been reflected above, causing the factory to create the class by
// calling
// its constructor with injected deps.
compilerMeta.useClass = type;
}
else if (isUseClassProvider(meta)) {
// The user explicitly specified useClass, and may or may not have provided deps.
compilerMeta.useClass = meta.useClass;
}
else if (isUseValueProvider(meta)) {
// The user explicitly specified useValue.
compilerMeta.useValue = meta.useValue;
}
else if (isUseFactoryProvider(meta)) {
// The user explicitly specified useFactory.
compilerMeta.useFactory = meta.useFactory;
}
else if (isUseExistingProvider(meta)) {
// The user explicitly specified useExisting.
compilerMeta.useExisting = meta.useExisting;
}
else {
// Can't happen - either hasAProvider will be false, or one of the providers will be set.
throw new Error("Unreachable state.");
}
def = getCompilerFacade().compileInjectable(angularCoreDiEnv, "ng:///" + type.name + "/ngInjectableDef.js", compilerMeta);
}
return def;
},
});
}
var ɵ0 = getClosureSafeProperty;
var USE_VALUE = getClosureSafeProperty({ provide: String, useValue: ɵ0 });
function isUseClassProvider(meta) {
return meta.useClass !== undefined;
}
function isUseValueProvider(meta) {
return USE_VALUE in meta;
}
function isUseFactoryProvider(meta) {
return meta.useFactory !== undefined;
}
function isUseExistingProvider(meta) {
return meta.useExisting !== undefined;
}
export { ɵ0 };
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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 {R3InjectableMetadataFacade, getCompilerFacade} from '../../compiler/compiler_facade';\nimport {Type} from '../../interface/type';\nimport {getClosureSafeProperty} from '../../util/property';\nimport {Injectable} from '../injectable';\nimport {NG_INJECTABLE_DEF} from '../interface/defs';\nimport {ClassSansProvider, ExistingSansProvider, FactorySansProvider, ValueProvider, ValueSansProvider} from '../interface/provider';\n\nimport {angularCoreDiEnv} from './environment';\nimport {convertDependencies, reflectDependencies} from './util';\n\n\n\n/**\n * Compile an Angular injectable according to its `Injectable` metadata, and patch the resulting\n * `ngInjectableDef` onto the injectable type.\n */\nexport function compileInjectable(type: Type<any>, srcMeta?: Injectable): void {\n  let def: any = null;\n\n  // if NG_INJECTABLE_DEF is already defined on this class then don't overwrite it\n  if (type.hasOwnProperty(NG_INJECTABLE_DEF)) return;\n\n  Object.defineProperty(type, NG_INJECTABLE_DEF, {\n    get: () => {\n      if (def === null) {\n        // Allow the compilation of a class with a `@Injectable()` decorator without parameters\n        const meta: Injectable = srcMeta || {providedIn: null};\n        const hasAProvider = isUseClassProvider(meta) || isUseFactoryProvider(meta) ||\n            isUseValueProvider(meta) || isUseExistingProvider(meta);\n\n\n        const compilerMeta: R3InjectableMetadataFacade = {\n          name: type.name,\n          type: type,\n          typeArgumentCount: 0,\n          providedIn: meta.providedIn,\n          ctorDeps: reflectDependencies(type),\n          userDeps: undefined,\n        };\n        if ((isUseClassProvider(meta) || isUseFactoryProvider(meta)) && meta.deps !== undefined) {\n          compilerMeta.userDeps = convertDependencies(meta.deps);\n        }\n        if (!hasAProvider) {\n          // In the case the user specifies a type provider, treat it as {provide: X, useClass: X}.\n          // The deps will have been reflected above, causing the factory to create the class by\n          // calling\n          // its constructor with injected deps.\n          compilerMeta.useClass = type;\n        } else if (isUseClassProvider(meta)) {\n          // The user explicitly specified useClass, and may or may not have provided deps.\n          compilerMeta.useClass = meta.useClass;\n        } else if (isUseValueProvider(meta)) {\n          // The user explicitly specified useValue.\n          compilerMeta.useValue = meta.useValue;\n        } else if (isUseFactoryProvider(meta)) {\n          // The user explicitly specified useFactory.\n          compilerMeta.useFactory = meta.useFactory;\n        } else if (isUseExistingProvider(meta)) {\n          // The user explicitly specified useExisting.\n          compilerMeta.useExisting = meta.useExisting;\n        } else {\n          // Can't happen - either hasAProvider will be false, or one of the providers will be set.\n          throw new Error(`Unreachable state.`);\n        }\n        def = getCompilerFacade().compileInjectable(\n            angularCoreDiEnv, `ng:///${type.name}/ngInjectableDef.js`, compilerMeta);\n      }\n      return def;\n    },\n  });\n}\n\ntype UseClassProvider = Injectable & ClassSansProvider & {deps?: any[]};\n\nconst USE_VALUE =\n    getClosureSafeProperty<ValueProvider>({provide: String, useValue: getClosureSafeProperty});\n\nfunction isUseClassProvider(meta: Injectable): meta is UseClassProvider {\n  return (meta as UseClassProvider).useClass !== undefined;\n}\n\nfunction isUseValueProvider(meta: Injectable): meta is Injectable&ValueSansProvider {\n  return USE_VALUE in meta;\n}\n\nfunction isUseFactoryProvider(meta: Injectable): meta is Injectable&FactorySansProvider {\n  return (meta as FactorySansProvider).useFactory !== undefined;\n}\n\nfunction isUseExistingProvider(meta: Injectable): meta is Injectable&ExistingSansProvider {\n  return (meta as ExistingSansProvider).useExisting !== undefined;\n}\n"]}