Class Initializers (Singleton)

Class.Mutators.Singleton.js

	Class.Initializers = {};
  Class.initializer = function(obj){ return this._initializer_ = obj; } 

	Class.Mutators.initialize = function(initialize){
		if(!this._initializer_) return initialize; // quick exit
		return function(){
			this._init_ = initialize;
			for (var modifier in Class.Initializers) {
				if (!this[modifier]) continue;
				this[modifier] = Class.Initializers[modifier].call(this, this[modifier]);
			}
			delete this.constructor['_initializer_'];
			return this._init_.apply(this, arguments);
		};
	};

	// We set the mutator so we can set a flag for the heavy 'initialize' mutator
	Class.Mutators.Singleton = Class.initializer;

Class.Initializers.Singleton = function(){
	
	var init = this._init_;

	this._init_ = function(){
		var instance = init.apply(this, arguments) || this;
		
		this.constructor.prototype.initialize = function(){
			return instance;
		};
		
		return instance;
	};
	
};