javascript的设计模式实现02之Builder

Builder模式参考图片：

代码：

var Product = function() {
	this.data1 = 1;
	this.data2 = 2;
	this.operation = function() {
		console.log(this);
	};
};


var Builder = function() {
	this.product = new Product;
};
Builder.prototype.buildPart = function() {};


var ConcreteBuilder1 = function() {
	var getResult = function() {
		return this.product;
	};
	this.buildPart = function() {
		var product = getResult.call(this);
		product.data1 = 11;
		return product;
	};
};

var builder = new Builder;
ConcreteBuilder1.prototype = builder;
ConcreteBuilder1.prototype.constructor = ConcreteBuilder1;

var ConcreteBuilder2 = function() {
	var getResult = function() {
		return this.product;
	};
	this.buildPart = function() {
		var product = getResult.call(this);
		product.data2 = 22;
		return product;
	};
};


ConcreteBuilder2.prototype = builder;
ConcreteBuilder2.prototype.constructor = ConcreteBuilder2;


var Director = function() {
	var builder = new ConcreteBuilder1;
	builder.buildPart().operation();
	builder = new ConcreteBuilder2;
	builder.buildPart().operation();
};

Director();