Adapter --连接连个不同接口

Function:
      Create a new interface(like a adapter or wrapper) between client and class of library. So when use another library, just need to modify the adapter without letting the client knows the change.

participants:
      client      IAdapter       Adapter       Adaptee

Summary:
      Pattern Adapter can hide the detail of the library. Client only knows the interface IAdapter, knows nothing about  how the Adapter does it.