Shulou(Shulou.com)06/01 Report--

This article mainly explains the "under what circumstances can you use the web abstract factory pattern", the content of the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "under what circumstances you can use the web abstract factory pattern"!

Applicability

Abstract Factory mode can be used in the following situations

When a system is independent of the creation, composition, and presentation of its products.

For a software of more than a certain scale, there is often a need for multiple functional components to work together. In order to reduce the coupling and enhance the expansibility, the system is often decomposed. At this time, it is a common way to separate the creation, composition (collaborative action) and presentation of functional components. The creation part of the functional component can use the abstract engineering pattern.

When a system is to be configured by one of multiple product families.

There are many examples of this, and in addition to the intended partial window theme, many slightly more complex data processing systems can also consider using the abstract factory pattern.

When you want to emphasize the design of a series of related product objects for joint use.

The creation of associated products is created by the same concrete factory class, which controls the factory class, and also controls the combination relationship of the related products.

When you provide a product class library and just want to show their interfaces rather than their implementation.

Although the concrete factory class of the actual action also produces the product of the concrete class, only the abstract factory class and abstract product class are exposed to Clinet. This leaves room for the product class library to adjust the product in the future.

Applicability induction

There are four scenarios listed above, and the point is one thing: if we want the process of creating a product to be separate from other processes, we can use a simple factory; if we also want to create a process that is extensible, we can use the abstract factory pattern.

The fourth case of the applicability of the design pattern is actually a by-product of the abstract factory pattern.

Development example

In addition to the examples in Design patterns, we also provide an example that is closer to development.

Suppose we have such an image legend software: the image formats that need to be processed are gif and jpeg, and the current requirements are color processing and size processing. Considering that image types may occur in the future and deal with the expansion of content, we can design this system as follows.

The above class diagram is basically the same as the previous example, except that there is a dependency between the two representational factory classes and all data processing representational classes.

Thank you for your reading, the above is the "under what circumstances can you use web abstract factory pattern" content, after the study of this article, I believe you can use web abstract factory pattern under what circumstances this problem has a deeper understanding, the specific use of the need for our practice to verify. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.