Gof Pattern Metaphors -by Michael Mahemoff Creational Patterns Builder (97) Prototype (117) Singleton (127) Structural Patterns Adapter (139) Bridge (151)

Factory (87) Imagine a manufacturer producing interior design parts --lights, cabinets, tables. The company produces each part in two styles and has a factory for each style: a Traditional Asian Factory (ConcreteFactory1) and a Contemporary European Factory (ConcreteFactory2). Both provides exactly the same part types (e.g. a Door; AbstractProductA), but using completely different methods to arrive at completely different styles (asked for a "Door", the Traditional Asian Factory produces an oak door, ProductA1, while the Contemporary European factory produces a steel door, ProductA2). At any time, a Client will either be designing a house in one of the two styles, so the client will simply choose one factory and all requests will go there. The expectation and requests will be exactly the same whether the client has chosen Asian or European, with style-independent requests like "I'll have three Desks and four Doors for each". Builder (97) In manufacturing, a Director manages the overall process (e.g. "get parts, run machine, test, deliver, bill") and delegates product-specific detail to Builders. Detailed Builder Example online. Prototype (117) Dolly the Sheep, amoeba, and other clones. The researcher (Client) "requested" Dolly's mum (ConcretePrototype1) to produce a clone of herself. In a word processor, cut-and-paste some text. You now have a separate, identical, copy, which you can modify. Singleton (127) A monotheistic viewpoint argues God is a Singleton to quote the Highlander movie about a completely underlated topic, "There can be only One". Scientists also have their version of Singleton: this universe and its universal laws. Postmodern family structures aside, a child may view Father as a singleton and Mother as another Singleton (one of each, even though both belong to the same superclass).