Decorator Design Pattern

In this video we will learn
1. What is Decorator Design Pattern
2. Implementation guidelines of decorator design pattern
3. Simple Decorator Design Pattern example

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Decorator Design Pattern : As per the GOF definition, decorator Pattern states that we need to “Attach additional responsibilities to an object dynamically. Decorators provide A flexible alternative to sub classing for extending functionality.”

This pattern Falls under the category of Structural Design Pattern and is also known as Wrapper.

Implementation Guidelines : We need to use Decorator Design Pattern when
1. We need to add responsibilities to individual objects dynamically and transparently,
2. The extension by sub classing is impractical.
3. Class definition may be hidden or otherwise unavailable for sub classing.

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[nandyad]

The best and the cleanest explanation... ❤

[AnupShah]

Thanks for all your hard work. With due respect i would like to add a suggestion as you are giving example first and not continuing the same on code creates confusion

[gkkumar]

very useful video. Thank you sir for the detailed video.

[noamyogev]

Thanks for the video. isn't CarDecorator should ONLY expose ICar interface?

[MultiSwayam]

Thanks for the video. If I want to implement a new functionality like getting a DoubleOfferPrice functionality inheriting from OfferPrice class how will I implement this?

[gormdrachmann]

Nice video - But you call the Suzuki class and not the Hundai you have in your presentation - just info.
Question - why are you making a variable from you interface - "private ICar car" - can anybody help?

[sovanroy]

It will be great if you can discuss how we can replace Decorator Pattern with Builder Pattern.

Thank you

[bradleyr]

Sorry this was not very good, with all due respect, you did not make the Decorator pattern clear at all. the code never talked about Suzuki as a class, otherwise the code runs if you change Suzuki to Hyndai maybe it was from another video IDK. where are the layers? Decorator should be about layering, you talk about ice cream for 100$ a scoop but never implement the concept

[ajayjain]

public OfferPrice(ICar car) : base(car)
{
} why we have created this constructor

[werthero]

This is the first comment on this video.