package designpattern.visitor;

/**

* 为该对象结构中ConcreteElement的每一个类声明一个Visit操作

*

* @author liu yuning

*

*/

public abstract class Visitor {

public abstract void visitConcreteElementA(ConcreteElementA concreteElementA);

public abstract void visitConcreteElementB(ConcreteElementB concreteElementB);

}

class ConcreteVisitor1 extends Visitor {

@Override

public void visitConcreteElementA(ConcreteElementA concreteElementA) {

System.out.println(concreteElementA.getClass().getSimpleName() + "被"

+ this.getClass().getSimpleName() + "访问");

}

@Override

public void visitConcreteElementB(ConcreteElementB concreteElementB) {

System.out.println(concreteElementB.getClass().getSimpleName() + "被"

+ this.getClass().getSimpleName() + "访问");

}

}

class ConcreteVisitor2 extends Visitor {

@Override

public void visitConcreteElementA(ConcreteElementA concreteElementA) {

System.out.println(concreteElementA.getClass().getSimpleName() + "被"

+ this.getClass().getSimpleName() + "访问");

}

@Override

public void visitConcreteElementB(ConcreteElementB concreteElementB) {

System.out.println(concreteElementB.getClass().getSimpleName() + "被"

+ this.getClass().getSimpleName() + "访问");

}

}