06-03-设计模式 访问者模式

package com.flower.fangwenzhe;

import java.util.LinkedList;
import java.util.List;
import java.util.stream.IntStream;

public class TestMain {
    public static void main(String[] args) {
        ObjectStructure o = new ObjectStructure();
        IntStream.range(0,3).forEach(i -> o.attach(new Man()));
        IntStream.range(0,3).forEach(i -> o.attach(new WoMan()));
        Success success = new Success();
        o.display(success);
        Fail fail = new Fail();
        o.display(fail);
    }
}
abstract class Action{
    public abstract void getManResult(Man man);
    public abstract void getWoManResult(WoMan woman);
}
class Success extends Action{
    @Override
    public void getManResult(Man man) {
        System.out.println("man is success");
    }

    @Override
    public void getWoManResult(WoMan woman) {
        System.out.println("woman is fail");
    }
}
class Fail extends Action{
    @Override
    public void getManResult(Man man) {
        System.out.println("man is fail");
    }

    @Override
    public void getWoManResult(WoMan woman) {
        System.out.println("woman is success");
    }
}
abstract class Person{
    public abstract void accept(Action action);
}
class Man extends Person{
    @Override
    public void accept(Action action) {
        action.getManResult(this);
    }
}
class WoMan extends Person{
    @Override
    public void accept(Action action) {
        action.getWoManResult(this);
    }
}
class ObjectStructure{
    private List<Person> personList = new LinkedList<>();

    public void attach(Person person){
        personList.add(person);
    }
    public void detach(Person person){
        personList.remove(person);
    }
    public void display(Action action){
        personList.forEach(x -> x.accept(action));
    }
}