Abstract Factory Design Pattern

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In this session we will learn
1. What is Abstract Factory Design Pattern
2. Implementation Guidelines
3. Abstract factory implementation
4. Differences between Factory Method and Abstract Factory Pattern
What is Abstract Factory Design Pattern
Gang Of Four Definition : "The Abstract factory pattern provides a way to encapsulate a group of individual factories that have a common theme without specifying their concrete classes"
The Abstract Factory Pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes
Abstract Factory pattern belongs to creational patterns and is one of the most used design patterns in real world applications
Abstract factory is a super factory that creates other factories
Implementation Guidelines
We need to Choose Abstract Factory Pattern when
1. The application need to create multiple families of objects or products
2. We need to use only one of the subset of families of objects at a given point of time
3. We want to hide the implementations of the families of products by decoupling the implementation of each of these operations
Business Requirement : Handout computers to Contract and Permanent employees based on the designation and employee type with below specifications
Permanent Employee
1. Managerial Position is eligible for Apple MAC Book Laptop
2. Non Managerial Position is eligible for Apple IMac desktop
Contract Employee
1. Managerial Position is eligible for Dell Laptop
2. Non Managerial Position is eligible for Dell desktop
Abstract Factory Representation
1. Client is a class which use AbstractFactory and AbstractProduct interfaces to create a family of related objects.
2. AbstractFactory is an interface which is used to create abstract product
3. ConcreteFactory is a class which implements the AbstractFactory interface to create concrete products.
4. AbstractProduct is an interface which declares a type of product.
5. ConcreteProduct is a class which implements the AbstractProduct interface to create product.
Difference between Abstract Factory and Factory Method
1. Abstract factory pattern adds a layer of abstraction to the factory method pattern
2. Abstract factory pattern implementation can have multiple factory methods
3. Similar products of a factory implementation are grouped in Abstract factory
4. Abstract Factory uses object composition to decouple applications form specific implementations
5. Factory Method uses inheritance to decouple applications form specific implementations

[@chandanasoundararajan8790]

you explains very well for singleton and factory pattern. But starting from Factory method pattern you stopped explaining at all why you are doing this. you just saying loud what you are typing and running the program. please give appropriate reason for why you are doing all this operations. it will be helpful for us in preparing for interviews.

[@deepthireddy3267]

Thanks for the patience and explanation. I have been struggling from years to understand diff between factory and abstract factory. Now it's clear ☺

[@rsdntevl]

Really great example, most tutorials stop at the if/else statement for creating the concrete product. Connecting with the front end form made much more sense!

[@govindarajkrishnan1933]

Hi Aviash
You did a great job. It was wonderful video, you explained very clear and neatly. Now its easy to understand anyone have knowledge in the programming. Good job. Keep up the good job. Thanks again.

[@HippieInHeart]

Very good videos, my colleague recommended them to me and I already start to understand much more. Thanks for the very good and easy to understand explanations.

[@enghazymeh9921]

this is the best video tutorial in the youtube that explain this design pattern in a clear way , alot of thanks bro

[@kamdemkakengne]

Thanks a lot for the video !

[@naodagere8210]

Thank you so much!Good job.

[@sanjeevgaur1973]

You didn't explain how come you immediate decided abstract pattern for this requirement? There should be some thought process which must be explained before start.

[@rvnl0rd]

It provides an abstract interface for creating many different Computer objects (depending on an Employee property values) while the creation itself is left to the respective conrete factories corresponding to the conrete computers. Factory itself corresponds to a SINGLE variant - this way the client (manager) by using single 'interface' can indirectly work with different objects (computers) and remain compatible with all of them.

[@sumersinghrana8868]

Thanks for the video

[@sunnydeck3954]

Thanks for the video. Please make video for Repository pattern,Builder Pattern, Iteratory Pattern, Decorator Pattern

[@raqibul1000]

Thanks a Billions.

[@dharmendrasharma3137]

Thanks alot sir..

[@harikrishna-gr8uz]

Very much helpful

[@trustingod0]

I notice that you dont reply to comments. Also I noticed you used interface. Do we use abstract classes with the Factory Method. If so I was wondering why? Thanks for your help !

[@abhi80ind]

Please illustrate UML diagram of your example before jumping to Implementation.

[@aaronaaronaaron5922]

you are cool, Avish!

[@venkateshgupta5219]

Excellent video

[@79manindar]

Sir, I am a. NET Developer just because of your videos, Please make a video series on MSBI.

[@nagarjunapappula8139]

I don't understand... only understand adding new items 😂

[@satyammishra30]

uffff that was a long ride. i am tried now.. bye

[@madhugowda8732]

its little bit confusing ...

[@aps7802]

All he is doing is just keep adding interfaces and classes without any explanation.

[@vejay369]

Is your computer audio working?

[@hemantgaikwad3352]

@@vejay369 yes

[@vejay369]

@@hemantgaikwad3352 wasn't asking you geekwad

[@afsaraf1533]

Does people use this complex implementation in their projects🫡

[@8uddishh]

I understand the simplicity part of it, and it should cover beginners... Albeit that being said please do not use methods in interfaces when a property can be used... thanks

[@sailutummuru7343]

Thanks for making this video. But lot of confusion. Not understand very well...

[@rahulsharmanew1]

Interface are by default public why we need to make interface public at 19.50?

[@akhilarao6668]

Please be clear while explaining .u r are not very clear u r just adding this class that class it would be better if u can relate something real-time then go to business requirements .and also it would be lil clear if u briefly summarize of wat u have done in the whole video at last

[@MrKaviraj75]

looks tedious and slept in the middle of the video :D

[@codeintermediate4529]

Abstract factory pattern has been explained well in this video too - czcams.com/video/HcxhrAqEukc/video.html

[@eliavmaman3203]

"IComputerFactory factory= new SystemEmployeeFactory (employee)" ?!?!?!?!!? WTF?????

[@MrAamir33]

Avesh you are mostly reading from slides, & not explaining even if we go by your videos I am not sure whether i would be able to remember the concept or not.

[@dgroh]

It was all good until the mess with IFs in the end =D

[@mrinal2100]

Half of the time he was coding and I got lost in multiple classes.

[@ashutoshsingh7713]

Not for beginners 💯✔

[@kashishsingh4324]

not for beginers

[@RajeshYadav-tr1sr]

why kud not made this video?? this guy is time waste...wasted time

[@pedroreisbr]

This class and this example is so bad, worst way to explain this concept. Must have confused a lot of people.

[@abidalisidd]

Its true

[@begelmanleonid6754]

"GetSystemDetails" can be also a method of the IComputerFactory, than you dont need the EmployeeSystemManage