桥接模式

Posted 2020-10-11 啊哈咧

桥接（Bridge）是用于把抽象化与实现化解耦，使得二者可以独立变化

 Abstraction

package design.pattern.bridge;

public abstract class Abstraction {
    protected Implementor impl;
    public Abstraction(Implementor impl) {
        this.impl = impl;
        this.impl.setAbstraction(this);
    }
    public void operation() {
        impl.operation();
    }
}

Implementor

package design.pattern.bridge;

public interface Implementor {
    public void operation();
    public void setAbstraction(Abstraction abstraction);
}

ConcreteAbstraction

package design.pattern.bridge;

public class ConcreteAbstraction extends Abstraction {
    public ConcreteAbstraction(Implementor impl) {
        super(impl);
    }

    @Override
    public void operation() {
        System.out.println("ConcreteAbstraction do sth");
        impl.operation();
    }
}

ConcreteImplementor

package design.pattern.bridge;

public class ConcreteImplementor implements Implementor{
    private Abstraction abstraction;

    public void setAbstraction(Abstraction abstraction) {
        this.abstraction = abstraction;
    }
    @Override
    public void operation() {
        System.out.println("ConcreteImplementor do sth with: " + abstraction);
    }
    
}

Client

package design.pattern.bridge;

public class Client {
    public static void main(String[] args) {
        new ConcreteAbstraction(new ConcreteImplementor()).operation();
    }
}