In programming, it’s not rare to build a system, to find out a few months down the line, there are a bunch of new requirements. Originally catering for a particular client or data set and then later having to cater for more and more, this is where the adapter pattern comes into play.
It’s the prototype pattern…. it’s literally beyond simple, so let’s get going.
However the builder pattern will not only create objects, but prepare them for your application too. The builder pattern actually uses the factory method pattern behind the scenes, but I’ll get onto that soon.
The purpose of any factory class, is to create and return instances of other classes, just like a real world factory creates products. There are two types of factory design patterns. One is called the factory method and the other is called an abstract factory. There is another not official pattern called simple factory. All are described in detail below. Let’s get going.