Table Of Content
The Bridge design pattern is a structural pattern that deals with decoupling abstraction and its implementation. It lets you split a set of related classes into two separate abstraction and implementation hierarchies. As these are now separated, you can develop them independently of each other. The animals don’t implement their own move()methods but they have a MoveLogic object that they refer to. The move() implementation is decoupled from the Animal interface. The benefit is that the code in the Animal class is cleaner, easy to understand and smaller.
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The first part is the Abstraction, and the second part is the Implementation. The Bridge Design Pattern allows both Abstraction and Implementation to be developed independently, and the client code can only access the Abstraction part without being concerned about the Implementation part. This example shows separation between the classes of remotes and devices that they control. If we want to reuse only the implementation (message sending) part in some other application, we will have to take along the abstraction part as extra baggage. Take your time, reading it thoroughly (that means one minute, not less and not more).
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As a developer, I have acquired a wealth of experience and knowledge in C#, software architecture, unit testing, DevOps, and Azure. I enjoy working on complex systems that require creative solutions.When I'm not glued to my computer screen, I like to spend time with my wife and two kids. With a lot of ease, there are some cons to the Bridge design pattern. Consider that there is a new version of the .NET framework that you use to compile and run the C# code, and you have numerous versions of the Framework loaded on your computer that you can choose.
Solution using Bridge Pattern
This is a concrete class, and it implements the abstract AbstractRemoteControl class and provides the implementation for SwitchOn, SwitchOff, and SetChannel methods. Further, if you notice, the constructor takes one parameter of ILEDTV type, i.e., an instance of one of the child classes of ILEDTV type that we want to access remotely. The Bridge Design Pattern works by creating two separate class hierarchies, one for the abstraction and one for the implementation. The abstraction defines the interface that the client uses, while the implementation provides the concrete implementation of that interface. The bridge between the two hierarchies is the interface that connects them.
The #dates object in thymeleaf deals with date objects in thymeleaf model…. Bridge emphasizes identifying and decoupling "interface" abstractionfrom "implementation" abstraction. What if we had three kinds of thread schedulers, and four kinds ofplatforms? What if we had five kinds of thread schedulers, and tenkinds of platforms? The number of classes we would have to defineis the product of the number of scheduling schemes and the numberof platforms. The above change does not affect the abstraction layer, so the client will not be impacted at all.
Bridge Design Pattern in C#
Developers don’t need classes with thousand lines of code which is irrelevant to the object's definition. In addition, if in the future we would like to add a new class, for example, Reptilewe can use the existing Swim class instead of copy pasting the logic inside the Reptile class. The Bridge Design Pattern avoids the need for multiple inheritance, which can lead to complex and hard-to-maintain code. Instead, it separates the abstraction and its implementation into separate class hierarchies, allowing them to evolve independently. Create a class file named SonyRemoteControl.cs and copy and paste the following code. This will also be a concrete class that implements the AbstractRemoteControl class and provides the implementation for SwitchOn, SwitchOff, and SetChannel methods.
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To organize and split a monolithic class
Suppose we have one requirement to SAVE or DELETE an object in the persistence. Here, we can save the object either into a File System or into a Database. In the same way, we can also delete an object either from a File System or from a Database. The FileSystemPersistenceImplementor is used to save the object into a file, whereas the DatabasePersistenceImplementor is used to save the object into a database. In the middle, you can see the Abstraction Layer, which provides two methods to do the Save and Delete Operations.
Types of Behvioural Patterns
With this approach, you can keep adding colors and shapes without having to worry about the number of classes. Main functionAs always (in my examples) the main function operates as the client. MoveLogic objects are created, then they are passed to the animals which use the decoupled move implementation. Create concrete bridge implementer classes implementing the DrawAPI interface.
The class itself can be thought of as the abstraction and what the class can do as the implementation. The bridge pattern can also be thought of as two layers of abstraction. Create a class file named SonyLedTv.cs and copy and paste the following code. This class also implements the ILEDTV interface and provides implementations for SwitchOn, SwitchOff, and SetChannel methods.
Persistence is the Abstraction Layer, and Persistence Implementation is the Implementation Layer. Now, if you want to add a new implementation or if you want to remove any of the existing implementations, then it will not affect the Abstraction Layer. As an example, if we change the implementation to allow clients to optionally encrypt the message before sending, we will need to update the abstraction part to make the encryption functionality available to clients.
Please read our previous article discussing the Decorator Design Pattern in C# with Examples. The Bridge Design Pattern falls under the category of Structural Design Pattern. As part of this article, we will discuss the following pointers. This story is published in Noteworthy, where 10,000+ readers come every day to learn about the people & ideas shaping the products we love. Adapter and Bridge are certainly related, and the distinction is subtle. It's likely that some people who think they are using one of these patterns are actually using the other pattern.
Also, as stated by GOF “Adapter makes things work after they’re designed; Bridge makes them work before they are.“. Similar to the other patterns of the classic Gang of Four structural pattern family, the objective of the bridge pattern is to identify how to realize relationships between classes and objects in a simple way. The bridge pattern does it by separating the abstraction and the implementation in separate class hierarchies. The bridge between the class hierarchies is achieved through composition.
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