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What this article shares with you is what the abstract factory model means. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it.

The abstract factory pattern is to create other factories around a super factory, also known as the factory of other factories. This type of design pattern is a creative pattern, which provides the best way to create objects.

The Abstract Factory pattern (Abstract Factory Pattern) is about creating other factories around one super factory. The super factory is also known as the factory of other factories. This type of design pattern is a creative pattern, which provides the best way to create objects.

In the abstract factory pattern, interfaces are factories responsible for creating related objects, and there is no need to explicitly specify their classes. Each generated factory can provide objects according to the factory pattern.

Introduction:

Intent: to provide an interface to create a series of related or interdependent objects without specifying their specific classes.

Mainly solve: mainly solve the problem of interface selection.

When to use: the product of the system has more than one product family, and the system consumes only one of the products.

How to solve it: define multiple products within a product family.

Key code: aggregate multiple similar products in a factory.

Application example: work, in order to attend some parties, there must be two or more sets of clothes, such as business clothes (sets, a series of specific products), fashion clothes (sets, a series of specific products), and even for a family, there may be business women's wear, business men's wear, fashion women's wear, fashion men's wear, these are also complete sets, that is, a series of specific products. Suppose there is a situation (it does not exist in reality, otherwise, there is no way to enter communism, but it is conducive to illustrating the abstract factory model), in your home, a certain wardrobe (specific factory) can only store one such clothes (complete sets, a series of specific products), and every time you take this complete set of clothes, you naturally have to take them out of this wardrobe. To understand with the idea of OOP, all wardrobes (concrete factories) are of wardrobe category (abstract factories), and each complete set of clothes includes specific tops (a specific product), trousers (a specific product), these concrete tops are actually tops (abstract products), and specific trousers are trousers (another abstract product).

Advantage: when multiple objects in a product family are designed to work together, it ensures that the client always uses only objects in the same product family.

Disadvantages: product family expansion is very difficult, to add a series of products, not only to add code in the abstract Creator, but also to add code in the concrete.

Use scene: 1, QQ change skin, a whole set of change together. 2. Generate programs of different operating systems.

Note: the product family is difficult to expand and the product grade is easy to expand.

Achieve:

We will create Shape and Color interfaces and entity classes that implement these interfaces. The next step is to create the abstract factory class AbstractFactory. Then define the factory classes ShapeFactory and ColorFactory, both of which extend AbstractFactory. Then create a factory creator / generator class FactoryProducer.

AbstractFactoryPatternDemo, our demo class uses FactoryProducer to get the AbstractFactory object. It passes the shape information Shape (CIRCLE / RECTANGLE / SQUARE) to AbstractFactory to get the type of object it needs. It also passes the color information Color (RED / GREEN / BLUE) to AbstractFactory in order to get the type of object it needs.

The above is what the abstract factory model means, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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