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refactor(core): cleanup decorators.ts (#12161)

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This commit is contained in:
Victor Berchet 2016-10-11 15:47:20 -07:00 committed by Tobias Bosch
parent 7275e1beb3
commit 7787771aba
1 changed files with 54 additions and 49 deletions
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103
modules/@angular/core/src/util/decorators.ts
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@ -6,10 +6,11 @@
* found in the LICENSE file at https://angular.io/license
*/
import {global, isFunction, stringify} from '../facade/lang';
import {global, stringify} from '../facade/lang';
import {Type} from '../type';
var _nextClassId = 0;
let _nextClassId = 0;
const Reflect = global.Reflect;
/**
* Declares the interface to be used with {@link Class}.
@ -87,7 +88,7 @@ export interface TypeDecorator {
}
function extractAnnotation(annotation: any): any {
if (isFunction(annotation) && annotation.hasOwnProperty('annotation')) {
if (typeof annotation === 'function' && annotation.hasOwnProperty('annotation')) {
// it is a decorator, extract annotation
annotation = annotation.annotation;
}
@ -99,13 +100,16 @@ function applyParams(fnOrArray: (Function | any[]), key: string): Function {
fnOrArray === Number || fnOrArray === Array) {
throw new Error(`Can not use native ${stringify(fnOrArray)} as constructor`);
}
if (isFunction(fnOrArray)) {
return <Function>fnOrArray;
} else if (fnOrArray instanceof Array) {
if (typeof fnOrArray === 'function') {
return fnOrArray;
}
if (Array.isArray(fnOrArray)) {
const annotations: any[] = fnOrArray;
const annoLength = annotations.length - 1;
const fn: Function = fnOrArray[annoLength];
if (!isFunction(fn)) {
if (typeof fn !== 'function') {
throw new Error(
`Last position of Class method array must be Function in key ${key} was '${stringify(fn)}'`);
}
@ -118,11 +122,11 @@ function applyParams(fnOrArray: (Function | any[]), key: string): Function {
const paramAnnotations: any[] = [];
paramsAnnotations.push(paramAnnotations);
const annotation = annotations[i];
if (annotation instanceof Array) {
if (Array.isArray(annotation)) {
for (let j = 0; j < annotation.length; j++) {
paramAnnotations.push(extractAnnotation(annotation[j]));
}
} else if (isFunction(annotation)) {
} else if (typeof annotation === 'function') {
paramAnnotations.push(extractAnnotation(annotation));
} else {
paramAnnotations.push(annotation);
@ -130,10 +134,10 @@ function applyParams(fnOrArray: (Function | any[]), key: string): Function {
}
Reflect.defineMetadata('parameters', paramsAnnotations, fn);
return fn;
} else {
throw new Error(
`Only Function or Array is supported in Class definition for key '${key}' is '${stringify(fnOrArray)}'`);
}
throw new Error(
`Only Function or Array is supported in Class definition for key '${key}' is '${stringify(fnOrArray)}'`);
}
/**
@ -183,7 +187,7 @@ function applyParams(fnOrArray: (Function | any[]), key: string): Function {
*
* ```
* var MyService = ng.Class({
* constructor: [String, [new Query(), QueryList], function(name, queryList) {
* constructor: [String, [new Optional(), Service], function(name, myService) {
* ...
* }]
* });
@ -193,7 +197,7 @@ function applyParams(fnOrArray: (Function | any[]), key: string): Function {
*
* ```
* class MyService {
* constructor(name: string, @Query() queryList: QueryList) {
* constructor(name: string, @Optional() myService: Service) {
* ...
* }
* }
@ -221,9 +225,11 @@ function applyParams(fnOrArray: (Function | any[]), key: string): Function {
export function Class(clsDef: ClassDefinition): Type<any> {
const constructor = applyParams(
clsDef.hasOwnProperty('constructor') ? clsDef.constructor : undefined, 'constructor');
let proto = constructor.prototype;
if (clsDef.hasOwnProperty('extends')) {
if (isFunction(clsDef.extends)) {
if (typeof clsDef.extends === 'function') {
(<Function>constructor).prototype = proto =
Object.create((<Function>clsDef.extends).prototype);
} else {
@ -231,8 +237,9 @@ export function Class(clsDef: ClassDefinition): Type<any> {
`Class definition 'extends' property must be a constructor function was: ${stringify(clsDef.extends)}`);
}
}
for (let key in clsDef) {
if (key != 'extends' && key != 'prototype' && clsDef.hasOwnProperty(key)) {
if (key !== 'extends' && key !== 'prototype' && clsDef.hasOwnProperty(key)) {
proto[key] = applyParams(<any>clsDef[key], key);
}
}
@ -249,10 +256,8 @@ export function Class(clsDef: ClassDefinition): Type<any> {
return <Type<any>>constructor;
}
var Reflect = global.Reflect;
export function makeDecorator(
name: string, props: {[key: string]: any}, parentClass?: any,
name: string, props: {[name: string]: any}, parentClass?: any,
chainFn: (fn: Function) => void = null): (...args: any[]) => (cls: any) => any {
const metaCtor = makeMetadataCtor([props]);
@ -264,26 +269,28 @@ export function makeDecorator(
if (this instanceof DecoratorFactory) {
metaCtor.call(this, objOrType);
return this;
} else {
const annotationInstance = new (<any>DecoratorFactory)(objOrType);
const chainAnnotation =
isFunction(this) && this.annotations instanceof Array ? this.annotations : [];
chainAnnotation.push(annotationInstance);
const TypeDecorator: TypeDecorator = <TypeDecorator>function TypeDecorator(cls: Type<any>) {
const annotations = Reflect.getOwnMetadata('annotations', cls) || [];
annotations.push(annotationInstance);
Reflect.defineMetadata('annotations', annotations, cls);
return cls;
};
TypeDecorator.annotations = chainAnnotation;
TypeDecorator.Class = Class;
if (chainFn) chainFn(TypeDecorator);
return TypeDecorator;
}
const annotationInstance = new (<any>DecoratorFactory)(objOrType);
const chainAnnotation =
typeof this === 'function' && Array.isArray(this.annotations) ? this.annotations : [];
chainAnnotation.push(annotationInstance);
const TypeDecorator: TypeDecorator = <TypeDecorator>function TypeDecorator(cls: Type<any>) {
const annotations = Reflect.getOwnMetadata('annotations', cls) || [];
annotations.push(annotationInstance);
Reflect.defineMetadata('annotations', annotations, cls);
return cls;
};
TypeDecorator.annotations = chainAnnotation;
TypeDecorator.Class = Class;
if (chainFn) chainFn(TypeDecorator);
return TypeDecorator;
}
if (parentClass) {
DecoratorFactory.prototype = Object.create(parentClass.prototype);
}
DecoratorFactory.prototype.toString = () => `@${name}`;
(<any>DecoratorFactory).annotationCls = DecoratorFactory;
return DecoratorFactory;
@ -295,12 +302,11 @@ function makeMetadataCtor(props: ([string, any] | {[key: string]: any})[]): any
const argVal = args[i];
if (Array.isArray(prop)) {
// plain parameter
const val = !argVal || argVal === undefined ? prop[1] : argVal;
this[prop[0]] = val;
this[prop[0]] = !argVal || argVal === undefined ? prop[1] : argVal;
} else {
for (let propName in prop) {
const val = !argVal || argVal[propName] === undefined ? prop[propName] : argVal[propName];
this[propName] = val;
this[propName] =
!argVal || argVal[propName] === undefined ? prop[propName] : argVal[propName];
}
}
});
@ -309,7 +315,7 @@ function makeMetadataCtor(props: ([string, any] | {[key: string]: any})[]): any
}
export function makeParamDecorator(
name: string, props: ([string, any] | {[key: string]: any})[], parentClass?: any): any {
name: string, props: ([string, any] | {[name: string]: any})[], parentClass?: any): any {
const metaCtor = makeMetadataCtor(props);
function ParamDecoratorFactory(...args: any[]): any {
if (this instanceof ParamDecoratorFactory) {
@ -331,8 +337,7 @@ export function makeParamDecorator(
}
parameters[index] = parameters[index] || [];
var annotationsForParam: any[] = parameters[index];
annotationsForParam.push(annotationInstance);
parameters[index].push(annotationInstance);
Reflect.defineMetadata('parameters', parameters, cls);
return cls;
@ -353,15 +358,15 @@ export function makePropDecorator(
if (this instanceof PropDecoratorFactory) {
metaCtor.apply(this, args);
return this;
} else {
var decoratorInstance = new (<any>PropDecoratorFactory)(...args);
return function PropDecorator(target: any, name: string) {
const meta = Reflect.getOwnMetadata('propMetadata', target.constructor) || {};
meta[name] = meta[name] || [];
meta[name].unshift(decoratorInstance);
Reflect.defineMetadata('propMetadata', meta, target.constructor);
};
}
const decoratorInstance = new (<any>PropDecoratorFactory)(...args);
return function PropDecorator(target: any, name: string) {
const meta = Reflect.getOwnMetadata('propMetadata', target.constructor) || {};
meta[name] = meta[name] || [];
meta[name].unshift(decoratorInstance);
Reflect.defineMetadata('propMetadata', meta, target.constructor);
};
}
if (parentClass) {
PropDecoratorFactory.prototype = Object.create(parentClass.prototype);