尽管只有简单工厂方法(Simple Factory Method)才是真正意义上的单件 (Singleton),但你会发现每一个特定的工厂类(这些类属于更为通用的factory模
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这与调用基类的工厂方法并断言返回对象具有正确类型一样简单。
This can be as simple as invoking the base class's factory method and asserting that the returned object is of the correct type. For example.
目前, getCalculator() 工厂方法采用了非常简单的方法,它假定由这个服务所创建的全部计算器都是通过相同的服务端点来访问的。
The getCalculator() factory method currently takes the very simple approach of assuming that all calculators created by this service will be accessed via the same service endpoint.
改进了简单工厂模式的实现策略,克服了原来简单工厂模式的局限性,同时弥补了工厂方法模式的不足。
The policy of Simple Factory is reformed, and applied to produce command objects, which eliminates the limitations of past Simple Factory and makes up the defect of Factory Method.
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