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The UML diagram below shows the sample implementation of the Bridge design pattern in C#. The above image shows that the bridge design pattern consists of four participants. Create a class named AbstractRemoteControl.cs and copy and paste the following code.
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With the bridge pattern, the abstraction maintains a Has-A relationship with the implementation instead of a IS-A relationship. The Has-A relationship is achieved through composition where the abstraction maintains a reference of the implementation and forwards client requests to it. If you notice the above example, both GreenSquare and RedSquare has the same logic except for the colors. If we could extract this implementation outside of the shapes, then we can reduce the number of classes. Here I am creating two interfaces, FileDownloaderAbstraction represents the abstraction with which the client will interact; and FileDownloadImplementor which represents the implementation.
Change in abstraction does not affect the implementation
As shown in the diagram, the class Animal is an abstraction (or interface) such that the three animals inherit from it. Each animal individually implements their own specific logic as to how they move(). Therefore, they declare their own move method.However, we are still not quite there yet. The pattern’s intent is to separate the move()logic from the abstraction. In this example, the code within the Animal classes should only be about defining the animal object representations.
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They are working with numerous API providers of a specific type and support multiple types of database servers. In that case, you can surely use the Bridge design pattern to make things easy for yourself. Bridge design pattern can be used when both abstraction and implementation can have different hierarchies independently and we want to hide the implementation from the client application. Create an interface named ILEDTV.cs and copy and paste the following code into it.
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To apply the bridge pattern to the messaging example, let’s write the abstraction class hierarchy. The bridge design pattern is used to decouple a class into two parts – abstraction and its implementation – so that both can evolve in the future without affecting each other. It increases the loose coupling between class’s abstraction and its implementation. Adding new shape types and colors to the hierarchy will grow it exponentially. For example, to add a triangle shape you’d need to introduce two subclasses, one for each color. And after that, adding a new color would require creating three subclasses, one for each shape type.
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For example, you can add a new TV (Panasonic TV) in the Implementation Layer, which will not affect the Abstraction Layer. You can also add a new Panasonic TV Remote Control in the Abstraction Layer without affecting the Implementation Layer. So, this is one of the best examples of the Bridge Design Pattern. In this post, We will see how to format and work with date objects in thymeleaf templates using the #dates utility with an example. Introduction Before getting in further, read a little about thymeleaf and how it can help build dynamic web applications.
You would prefer to say that each Shape has a Color and to implement a hierarchy of colors, and that is the Bridge Pattern. Well, I wouldn't implement a "hierarchy of colors", but you get the idea... Here, our abstraction (general idea of the objects) is the View and the specific kind of view like LongView or ShortView is our implementation (specific implementation of the object). When a class varies often, the features of object-oriented programming become very useful because changes to a program's code can be made easily with minimal prior knowledge about the program. The bridge pattern is useful when both the class and what it does vary often.
Understanding the Problem
By the way, this last item is the main reason why so many people confuse the Bridge with the Strategy pattern. Remember that a pattern is more than just a certain way to structure your classes. This type of bridge contrasts to suspension bridges as the cables span directly from the towers or pylons as opposed to being suspended vertically from a cable.
Bridge Design Pattern in C# with Examples
In the next article, I will discuss Real-Time Examples of Bridge Design Patterns using C#- Send Messages. In this article, I try to explain the Bridge Design Pattern in C# with Examples. I hope you understand the need and use of the Bridge Design Pattern in C# with Examples. The first layer is the Abstraction Layer, and the second layer is the Implementation Layer.
In this way, both hierarchies can evolve separately without affecting each other. As this problem is a classical platform independence-related problem, I will use a bridge pattern to solve this. I will break the downloader component into abstraction and implementer parts. The bridge pattern is an application of the old advice, “prefer composition over inheritance“. It becomes handy when you must subclass different times in ways that are orthogonal with one another. The client code links the desired type of remote control with a specific device object via the remote’s constructor.
So you're working on a new software project and about to reach the testing phase.That's great news! But have you considered the different testing types you need to perform? Great article, I read 2 prior articles which described this pattern, but in no way demonstrated why you would ever have a need to use it.
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