Refactoring To Patterns Part-1

1 — Chain Constructors*

You have multiple constructors that contain duplicate code, Chain the constructors together to obtain the least duplicate code.

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2 — Replace Multiple Constructors with Creation Methods*

Many constructors on a class make it hard to decide which constructor to call during development, Replace the constructors with Creation Methods that return object instances.

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3 — Encapsulate Subclasses with Creation Methods*

Subclasses implement a common interface but are constructed in diverse ways, Encapsulate the subclasses with intention-revealing Creation Methods in the base class

Motivation :

1-The motivation for doing this refactoring is to hide implementation details from those who don’t need to know about them.

2-the door is closed for changing the subclass interface in response to the needs of client code.

4 — Extract Creation Class*

Too many Creation Methods on a class obscure its primary responsibility (or responsibilities) break the single responsibility principle, Move the Creation Methods for a related set of classes to one Creation Class.