行为型设计模式之访问者模式

 4.1问题的解决方法

package test;

public class Problem3 {

    public static void main(String[] args) {
        //访问者
        IGamePersonPart gamePerson=new GamePerson();
        gamePerson.accept(new GamePersonDisplayPartVisitor());        

    }
}
interface IGamePersonPart{
    public void accept(GamePersonVisitor gamePersonVisitor);
} 
class GamePerson implements IGamePersonPart{
    IGamePersonPart[] decorates;
    //存储游戏人物配置
    public GamePerson(){
        decorates=new IGamePersonPart[]{new Clothes(),new Shoes(),new Accessories(),new Arms()};
    }
    @Override
    public void accept(GamePersonVisitor gamePersonVisitor) {
        // TODO Auto-generated method stub
        for(int i=0;i<decorates.length;i++) {
            decorates[i].accept(gamePersonVisitor);
        }
        gamePersonVisitor.visit(this);
    }    
}
class Clothes implements IGamePersonPart{
    @Override
    public void accept(GamePersonVisitor gamePersonVisitor) {
        // TODO Auto-generated method stub
        gamePersonVisitor.visit(this);
    }        
}

class Shoes implements IGamePersonPart{
    @Override
    public void accept(GamePersonVisitor gamePersonVisitor) {
        // TODO Auto-generated method stub
        gamePersonVisitor.visit(this);
    }    
}
class Accessories implements IGamePersonPart{
    @Override
    public void accept(GamePersonVisitor gamePersonVisitor) {
        // TODO Auto-generated method stub
        gamePersonVisitor.visit(this);
    }    
}
class Arms implements IGamePersonPart{
    @Override
    public void accept(GamePersonVisitor gamePersonVisitor) {
        // TODO Auto-generated method stub
        gamePersonVisitor.visit(this);
    }    
}

interface GamePersonVisitor {
       public void visit(GamePerson gamePerson);
       public void visit(Clothes clothes);
       public void visit(Shoes shoes);
       public void visit(Accessories accessories);
       public void visit(Arms arms);
}
//游戏人物和细节展示
class GamePersonDisplayPartVisitor implements GamePersonVisitor {
         
       @Override
       public void visit(GamePerson gamePerson) {
          System.out.println("Displaying GamePerson.");
       }
     
       @Override
       public void visit(Clothes clothes) {
          System.out.println("Displaying Clothes.");
       }
     
       @Override
       public void visit(Shoes shoes) {
          System.out.println("Displaying Shoes.");
       }
     
       @Override
       public void visit(Accessories accessories) {
          System.out.println("Displaying Accessories.");
       }
       @Override
       public void visit(Arms arms) {
          System.out.println("Displaying Arms.");
       }
    }