What are the advantages of the abstract factory pattern?

The advantages of the abstract factory pattern are: 1. The abstract factory pattern isolates the production of specific classes, so that customers do not need to know what is created; 2. When multiple objects in a product family are designed together When working, it ensures that clients always only use objects from the same product family.

Advantages:

1. The abstract factory pattern isolates the production of specific classes, so that customers do not need to know what is created.

2. When multiple objects in a product family are designed to work together, it can ensure that the client always only uses objects in the same product family.

3. It is very convenient to add new specific factories and product families without modifying the existing system. It complies with the "opening and closing principle"

Applicable scenarios

When objects need to be created When it is a series of interrelated or interdependent product families, you can use the abstract factory pattern. To put it more clearly, in an inheritance system, if there are multiple hierarchical structures (that is, there are multiple abstract classes), and there are certain associations or constraints between the implementation classes belonging to each hierarchical structure, then You can use the abstract factory pattern. If there are no relationships or constraints between implementation classes in each hierarchical structure, it is more appropriate to use multiple independent factories to create products.

Summary

Whether it is a simple factory pattern, a factory method pattern, or an abstract factory pattern, they all belong to the factory pattern and are very similar in form and characteristics. Their ultimate goals are For decoupling. When using it, we don't have to worry about whether this pattern is a factory method pattern or an abstract factory pattern, because the evolution between them is often confusing. Often you will find that when new requirements come and a new method is added to the factory method pattern that is clearly used, it becomes the abstract factory pattern because the products in the class constitute product families in different hierarchical structures. For the abstract factory pattern, when one method is reduced so that the provided products no longer constitute a product family, it evolves into the factory method pattern.

So, when using the factory pattern, you only need to care about whether the purpose of reducing coupling is achieved.

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