In this article, I am going to talk about the two concepts that may seem similar at so many levels. Like in .NET and Java, the class is also a component. Component and Objects also share a few properties, including reusability, encapsulation, minimal dependencies, etc.
Component-based design primarily focuses on the decomposition of the design to create reusable software components. Each component represents a well-defined interface containing methods, events, and properties. It offers a higher level of abstraction and converts a more significant problem into smaller and manageable issues.
The object-oriented design divides a complex system into smaller, manageable, reusable sub-systems with lesser complexities.
So, what is the difference between object-oriented and component-based design?
Object-oriented vs. component-based design explained.
Component-based software engineering uses simple, independent modules to create a wide range of functionality throughout the software. To design a component-based, you don’t need to know the ins-and-outs of the entire system as it focuses on different components individually.
You can interchange these components without affecting the efficiency of the product, just like interchangeable parts of a vehicle, as each component is an independent and manageable piece on its own. This reduces the complexity, maintenance, and support requirement for a software system.
In other words, component-based software design consists of loosely-bound components, serving separate concerns, operating as a unity together. Whereas, in object-oriented design, a single class is used instead of multiple components.
A class can further inherit properties and methods, and hence, you need to have some knowledge of ins-and-outs of the entire code.
In component-based, you can easily make any changes to a component without thinking about its effect on other components. Each component is designed to perform a specific function and can perform independently, whereas, in object-oriented design, changing one class can change other classes or sub-classes as well.
You can code component-based design in more than one programming methodology, whereas object-oriented software is coded using a single programming language.
OOP is a more implementation-focused approach, whereas component-based software design considers the whole application and doesn’t care about how its components are programmed.
What confuses beginners is the fact that object-oriented can also be designed as component-based as long as all communication rules are being followed. Component-based software design is slowly replacing the traditional object-oriented design because it saves your time and money when implemented in the right way.