Factory Template in JavaScript

Question

I want to separate the creation of JavaScript objects from the code used so that I have the flexibility to replace one implementation of the object with another implementation of the object that has the same signature, without touching most of the code. To do this, I come up with the concept of a repository and the Factory method for creating objects. Here is the implementation:

//The Factory Method
function ObjectFactory() {}
ObjectFactory.create = function (o) {
    var args = [].slice.call(arguments, 1);

    function F() {}
    F.prototype = o.prototype;
    var instance = new F();
    o.apply(instance, args);
    return instance;
};

//The Repository
var Repository = {
    'invitation': Invitation,
    'message': Message
};

//Usage
var inv = ObjectFactory.create(Repository["invitation"], "invitation", "invitation body", "Sender");
var msg = ObjectFactory.create(Repository["message"], "message", "message body");
var inv2 = ObjectFactory.create(Repository["invitation"], "invitation2", "invitation body2", "Sender");

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Answer 1

Object.create() ES5 : https://github.com/kriskowal/es5-shim/blob/master/es5-shim.js

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