• This is a rarely used pattern. It exists only when you have factory patterns in the project.
• Abstract factory expands on the basic factory pattern.
• Abstract factory helps us to unite similar factory patterns classes into one unified interface. This leads to more simplified interface for the client.

Example:

Steps:

• We have common an Interface or Abstract class

• The concrete classes implement this interface or abstract class.

• Then a new factory class is created which takes care of object creation. A similar abstract factory class takes the decision of returning the asked factory object. This abstract class will be used by the client.

• The client calls the static class object in above by creating an abstract class instead of the factory classes, as follows: