Creational design patterns

1. Abstract factory pattern

2. Builder pattern

3. Factory method pattern

4. Prototype pattern

5. Singleton pattern

 Factory method pattern - 
                                           we create object without exposing the creation logic to the client.

We're going to create a Shape interface and concrete classes implementing the Shape interface. A factory class ShapeFactory is defined as a next step.

Abstract factory pattern -

                                Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories.

One more label wrapper of factory pattern

Builder pattern -
                             Builder design pattern is to separate the construction of a complex object from its representation

A Builder class builds the final object step by step. This builder is independent of other objects.

Example:  

We have considered a business case of fast-food restaurant where a typical meal could be a burger and a cold drink. Burger could be either a Veg Burger or Chicken Burger and will be packed by a wrapper. Cold drink could be either a coke or pepsi and will be packed in a bottle.

Prototype pattern:

                                Prototype pattern refers to creating duplicate object while keeping performance in mind.

This pattern involves implementing a prototype interface which tells to create a clone of the current object

Example:

                 Volume clone in project