用途

桥接模式 (Bridge)
抽象部分与实现部分分离,使它们都可以独立的变化。
桥接模式是一种结构式模式
结构

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" alt="" />
图-桥接模式结构图

Implementor : 定义实现接口

interface Implementor {

    // 实现抽象部分需要的某些具体功能

    public void operationImpl();

}

Abstraction : 定义抽象接口

abstract class Abstraction {

    // 持有一个 Implementor 对象,形成聚合关系

    protected Implementor implementor;

    

    public Abstraction(Implementor implementor) {

        this.implementor = implementor;

    }

    

    // 可能需要转调实现部分的具体实现

    public void operation() {

        implementor.operationImpl();

    }

}

ConcreteImplementor :  实现 Implementor 中定义的接口。

class ConcreteImplementorA implements Implementor {

    @Override

    public void operationImpl() {

        // 真正的实现

        System.out.println("具体实现A");

    }    

}

class ConcreteImplementorB implements Implementor {

    @Override

    public void operationImpl() {

        // 真正的实现

        System.out.println("具体实现B");

    }    

}

RefinedAbstraction : 扩展 Abstraction 类。

class RefinedAbstraction extends Abstraction {

    public RefinedAbstraction(Implementor implementor) {

        super(implementor);

    }

    

    public void otherOperation() {

        // 实现一定的功能,可能会使用具体实现部分的实现方法,

        // 但是本方法更大的可能是使用 Abstraction 中定义的方法,

        // 通过组合使用 Abstraction 中定义的方法来完成更多的功能。

    }

}

测试代码

public class BridgePattern {

    public static void main(String[] args) {

        Implementor implementor = new ConcreteImplementorA();

        RefinedAbstraction abstraction = new RefinedAbstraction(implementor);

        abstraction.operation();

        abstraction.otherOperation();

    }

}

运行结果

具体实现A

其他操作
应用场景

1、如果你不希望在抽象和实现部分采用固定的绑定关系,可以采用桥接模式,来把抽象和实现部分分开,

然后在程序运行期间来动态的设置抽象部分需要用到的具体的实现,还可以动态切换具体的实现。

2、如果出现抽象部分和实现部分都应该可以扩展的情况,可以采用桥接模式,让抽象部分和实现部分可以

独立的变化,从而可以灵活的进行单独扩展,而不是搅在一起,扩展一边会影响到另一边。

3、如果希望实现部分的修改,不会对客户产生影响,可以采用桥接模式,客户是面向抽象的接口在运行,

实现部分的修改,可以独立于抽象部分,也就不会对客户产生影响了,也可以说对客户是透明的。

4、如果采用继承的实现方案,会导致产生很多子类,对于这种情况,可以考虑采用桥接模式,分析功能变

化的原因,看看是否能分离成不同的纬度,然后通过桥接模式来分离它们,从而减少子类的数目。

要点

如果一个系统需要在构件的抽象化角色和具体化角色之间增加更多的灵活性,避免在两个层次之间建立静态的联系。
抽象化角色和具体化角色都应该可以被子类扩展。在这种情况下,桥接模式可以灵活地组合不同的抽象化角色和具体化角色,并独立化地扩展。
设计要求实现化角色的任何改变不应当影响客户端,或者说实现化角色的改变对客户端是完全透明的。
推荐

本文属于 JAVA设计模式系列

参考资料

《大话设计模式》

《HeadFirst设计模式》

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