# 抽象工厂模式

## 直接上代码

```javascript
// 具体工厂继承自抽象工厂
class FakeStarFactory extends MobilePhoneFactory {
    createOS() {
        // 提供安卓系统实例
        return new AndroidOS()
    }
    createHardWare() {
        // 提供高通硬件实例
        return new QualcommHardWare()
    }
}

// 定义操作系统这类产品的抽象产品类
class OS {
    controlHardWare() {
        throw new Error('抽象产品方法不允许直接调用，你需要将我重写！');
    }
}

// 定义具体操作系统的具体产品类
class AndroidOS extends OS {
    controlHardWare() {
        console.log('我会用安卓的方式去操作硬件')
    }
}

class AppleOS extends OS {
    controlHardWare() {
        console.log('我会用🍎的方式去操作硬件')
    }
}
```

使用的时候代码

```javascript
// 这是我的手机
const myPhone = new FakeStarFactory()
// 让它拥有操作系统
const myOS = myPhone.createOS()
```

假如有一天，FakeStar过气了，我们需要产出一款新机投入市场，这时候怎么办？我们是不是**不需要对抽象工厂MobilePhoneFactory做任何修改**，只需要拓展它的种类：

```javascript
class newStarFactory extends MobilePhoneFactory {
    createOS() {
        // 操作系统实现代码
    }
    createHardWare() {
        // 硬件实现代码
    }
}
```

这么个操作，**对原有的系统不会造成任何潜在影响** 所谓的“对拓展开放，对修改封闭”就这么圆满实现了。前面我们之所以要实现**抽象产品类**，也是同样的道理。


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://mm.ricky.moe/other/she-ji-mo-shi-1/chou-xiang-gong-chang-mo-shi.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.