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refactor(ng-module-loader): simplify the ng-module-loader internals

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simplify the ng-module-loader internals
This commit is contained in:
Dan Bucholtz
2017-03-09 15:44:04 -06:00
parent eaadea7569
commit f84d38346e
1 changed files with 6 additions and 39 deletions
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45
src/util/ng-module-loader.ts
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@ -1,44 +1,17 @@
import { Compiler, Injectable, NgModuleFactory, Optional } from '@angular/core';
const FACTORY_CLASS_SUFFIX = 'NgFactory';
/**
* Configuration for NgModuleLoader.
* token.
*
* @experimental
*/
export abstract class NgModuleLoaderConfig {
/**
* Prefix to add when computing the name of the factory module for a given module name.
*/
factoryPathPrefix: string;
/**
* Suffix to add when computing the name of the factory module for a given module name.
*/
factoryPathSuffix: string;
}
const DEFAULT_CONFIG: NgModuleLoaderConfig = {
factoryPathPrefix: '',
factoryPathSuffix: '.ngfactory',
};
import { Compiler, Injectable, NgModuleFactory } from '@angular/core';
/**
* NgModuleFactoryLoader that uses SystemJS to load NgModuleFactory
*/
@Injectable()
export class NgModuleLoader {
private _config: NgModuleLoaderConfig;
constructor(private _compiler: Compiler, @Optional() config?: NgModuleLoaderConfig) {
this._config = config || DEFAULT_CONFIG;
constructor(private _compiler: Compiler) {
}
load(modulePath: string, ngModuleExport: string) {
const offlineMode = this._compiler instanceof Compiler;
return offlineMode ? loadPrecompiledFactory(this._config, modulePath, ngModuleExport) : loadAndCompile(this._compiler, modulePath, ngModuleExport);
return offlineMode ? loadPrecompiledFactory(modulePath, ngModuleExport) : loadAndCompile(this._compiler, modulePath, ngModuleExport);
}
}
@ -59,16 +32,10 @@ function loadAndCompile(compiler: Compiler, modulePath: string, ngModuleExport:
}
function loadPrecompiledFactory(config: NgModuleLoaderConfig, modulePath: string, ngModuleExport: string): Promise<NgModuleFactory<any>> {
let factoryClassSuffix = FACTORY_CLASS_SUFFIX;
if (ngModuleExport === undefined) {
ngModuleExport = 'default';
factoryClassSuffix = '';
}
return System.import(config.factoryPathPrefix + modulePath + config.factoryPathSuffix)
function loadPrecompiledFactory(modulePath: string, ngModuleExport: string): Promise<NgModuleFactory<any>> {
return System.import(modulePath)
.then((rawModule: any) => {
const ngModuleFactory = rawModule[ngModuleExport + factoryClassSuffix];
const ngModuleFactory = rawModule[ngModuleExport];
if (!ngModuleFactory) {
throw new Error(`Module ${modulePath} does not export ${ngModuleExport}`);
}