Decorator Design Pattern | Low Level Design | OOPS | Java | Best Video to Understand

0:00 - Real Life Use Case of Decorator Pattern
1:55 - Understanding Decorator Pattern from an OOPS Point of View
6:25 - Code Demonstration
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Tags
#designpatterns #builderpattern #lld #oops #java

[@amitrajitdas31]

Great! helping me revising my OOP concepts as well as getting some insights on LLD and Design Patterns.

[@adhrit1426]

Top notch explanation with great clarity. Thanks

[@sandeepsinghchauhan1198]

Hi Riddhi, you are really great at explaining end to end in simple way... Please add other remaining design pattern videos as well. Thanks buddy.

[@DileepV-on7wk]

great explanation ::Thanks

[@ShwetaKarolMinhas]

Great explanation !
For all confused about why use decorator at all, please see that the decorators do not have an existence by themselves and are useful only in conjunction with the main product. Instantiating cheese just by itself has no meaning, it is not a burger type, it is an add on. It has to have a burger instance for it to exist. That's why decorator class and the reason why this is a 'structural' pattern.
However, I do feel that the Builder pattern can be used by the client code to build the final add-on decorator product, and the 2 products - burger and add-on decorator can finally be processed. @rite2riddhi please comment on this question.

[@iamnoob7593]

Nice

[@vamsimudaliar7931]

Thanks for the explaination. Great video, I have a question. how can we remove items from the decorated burger ? Please suggest

[@manishasingh-de8hi]

great explaination. Now I just feel like having a burger.

[@hiteshza4692]

Hi, great content & explanation, appreciate it. How can I get the code you wrote? could you share it?

[@kaushalcavale7596]

Very nice video. Thanks for making it

[@rite2riddhi]

Thanks man

[@girishgarg2816]

Same can also be done by Builder pattern. For eg: Builder.addCheese(true).build(). The builder would be part of the Burger abstract class and since TandooriBurger and ZingerBurger extend Burger, so they will also get the Builder.

[@prathamj2215]

Understood! And also hungry now!😂

[@JayShah_._._]

Why do we need another abstract class birgerdecorator and not use the burger class itself ?

[@deepalirathod4929]

Please add more videos in this series .

[@nithinnarayanansaravanan7792]

Sir, are decorators always abstract? If it is festival time and we need to introduce some cost discounts, we can directly write the common function inside the decorator class instead of changing both cheese and mayonnaise classes.

[@rishav144]

great video ...pls cover more design patterns

[@rite2riddhi]

Yes sure.

[@rajsrivastava1362]

ThankYou for this highly informative video. I have one question, Can you please tell why can't we use a Builder pattern here, to make the Burger with all extra toppings (where all different toppings implement an interface), and then appending / adding topping's description and cost with burger's description and cost with every topping added and then finally build the burger.

[@rite2riddhi]

Um you can. But this ideally seems a better way. Because most of the time your burger gonna contain null values. And in the cost() , there would be lot of null checks. Code readability :)

[@shubhampokhriyal8491]

great content 🎉

[@rite2riddhi]

Thanks

[@alikagarwala210]

Great 💖

[@rite2riddhi]

Thanks

[@tuhinmukherjee8141]

Alternately, the Burger Decorator could keep a pointer to the Burger instance which would have been passed to it through it's constructor.
Anyway, both seem fine.

[@prathamj2215]

I wanted to know which is a good practice considering scalability/extensibility? Passing the burger instance by reference or passing the burger instance's copy? (By value)

[@raghunadh_g]

Didn't understand the use of Decorator abstract class here.. ExtraCheese class can also be the direct child of the Burger abstract class right? Am I missing something here 🤔

[@obsessiveDreamer]

I was also thinking the same doubt, why do we need to make an extra abstract class? if we can achieve the same result by just inheriting the burger class. But I think He is doing that, just for the sake of differentiation between burgers and decorators as well as the readability of code.

[@dhandobykashyapkale]

@@obsessiveDreamer Makes Sense

[@lovleshbhatt7797]

what is the point of adding this BurgerDecorator , can't we directly do this in the ExtraChesse Class?

[@rajrangwani5669]

Currently doesn't seems to have use-case of BurgerDecorator, as it is just empty abstract class, but in some cases we might need this layer, let's say for coffee maker, there can be a chocolate topping and there can be multiple chocolate types like dark chocolate, standard chocolate, etc. and all these type of chocolates should have some common property of chocolate, in that case chocolateDecorator with common property of chocolate will be required an abstract class.

[@girishdoddi7698]

Here he added the burger object in both cheese and mayonnaise classes, but we can use decorator class to create the object right there without doing the same work multiple times in addons of cheese classes.

[@neelanshgulati2643]

Do we actually need the decorator class, I mean we can simply extend burger class for with cheese and mayo?

[@rite2riddhi]

Otherwise how would you differentiate a normal burger like a zinger burger and a burger decorator?

[@codewithnirmal]

@@rite2riddhi I think the decorator class may be needed if we need to add a decoration like smilies or any other shapes into our Burger. Correct me If I was wrong.

[@rahulshit8766]

codee dada?

[@mansinawani8970]

I want to eat zinger burger after watching this video.

[@easward]

Not Cheese miyo, the explanation is butter

[@sayankarmakar13]

Hey riddhi
One suggestion is that please speak slowly and apart from this everything is good.

[@siddharthdutta2946]

We dont need watch memes or stupid video clips during the video.