`for(let key of [ ...Object.getOwnPropertyNames(map), ...Object.getOwnPropertySymbols(map) ])`
... or ... `for(let key of Reflect.ownKeys(map))` On Tue, Jan 19, 2016 at 4:10 PM, 森建 <[email protected]> wrote: > maybe okay. > > ```js > "use strict"; > > // utility > function createProtectedStorage() { > const wm = new WeakMap(); > > return (self, protectedClass) => { > const map = wm.get(self); > > if(protectedClass == null) { > if(map) { > return map; > } else { > const ret = Object.create(null); > wm.set(self, ret); > return ret; > } > } > > const p = new protectedClass(self); > if(map) { > for(let key of [ ...Object.getOwnPropertyNames(map), > ...Object.getOwnPropertySymbols(map) ]) { > > const descriptor = Object.getOwnPropertyDescriptor(map, key); > Object.defineProperty(p, key, descriptor); > } > } > wm.set(self, p); > return p; > } > } > > const _ = createProtectedStorage(); > > > class Protected_A { > > constructor(publicThis) { > this.publicThis = publicThis; > } > > getName() { > return `${this.publicThis.name} ${this.lastName}`; > } > } > > class A { > > constructor(name, lastName) { > // protected this > if(new.target === A) { > _(this, Protected_A); > } > > // public property > this.name = name; > > // protected property > Object.defineProperty(_(this), "lastName", { > enumerable: false, > configurable: false, > writable: false, > value: lastName > }); > } > > callGetName() { > // call protected method > return _(this).getName(); > } > } > > // extends > class Protected_B extends Protected_A { > > getAge() { > return this[Symbol.for("$$age")]; > } > > } > > class B extends A { > > constructor(name, lastName, age) { > super(name, lastName); > > // protected this > if(new.target === B) _(this, Protected_B); > > // protected property > _(this)[Symbol.for("$$age")] = age; > } > > callGetAge() { > return _(this).getAge(); > } > > // added > getData() { > return { > name: _(this).getName(), // Protected_A > [Symbol.for("$$age")]: _(this).getAge() > } > } > > getLastNameDescriptor() { > return Object.getOwnPropertyDescriptor(_(this), "lastName"); > } > > getAgeDescriptor() { > return Object.getOwnPropertyDescriptor(_(this), Symbol.for("$$age")); > } > > } > > // do nothing class > class Protected_C extends Protected_B { > > } > > class C extends B { > > constructor(...args) { > super(...args); > if(new.target === C) _(this, Protected_C); > } > > } > > // test > const c = new C("foo", "bar", 18); > > // "foo bar" > console.log(c.callGetName()); > > // 18 > console.log(c.callGetAge()); > > // { "name": "foo bar", [Symbol($$age)]: 18 } > console.log(c.getData()); > > // { "value": "bar", "writable": false, "enumerable": false, > "configurable": false } > console.log(c.getLastNameDescriptor()); > > // { "value": 18, "writable": true, "enumerable": true, "configurable": > true } > console.log(c.getAgeDescriptor()); > ``` >
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