Visitor Pattern

Get elements of Composite Patter </ font>

Check with the following class structure

class	Explanation
interface face	Type and accept()To define
faceImple.class	implement face
faceList.class	implement face Have a List Has a method that issues a List iterator
Visitor.class	Provide a Visitor Pattern
user(Main.class)	Check the operation

User Includes the meaning that other developers use this pattern

`interface_face`


interface face{
  void accept(Visitor visit);
}

`faceImple.class`


class faceImple implements face{
  public void accept(Visitor visitor){
         System.out.println("."+this);}
}

`faceList.class`


class faceList implements face{
  List ls = new ArrayList();
  void      add( face fc){ls.add(fc);}
  public    void accept(Visitor visit){
            visit.visitor(this);}
  Iterator  iterate(){return ls.iterator();}
}

`Visitor.class`


class Visitor{
      void visitor( faceImple imple ){
           imple.accept(this);}
      void visitor( faceList list ){
           Iterator it = list.iterate();
           while(it.hasNext()){
                 face fc = (face) it.next();
                 System.out.println("/"+fc);
                 fc.accept(this);
           }
      }
}

`user(Main.class)`


public static void main(String[] args){
       faceList f1 = new faceList();
       faceList f2 = new faceList();
       faceList f3 = new faceList();
       f3.add(new  faceImple());
       f3.add(new  faceImple());
       f2.add(new  faceImple());
       f2.add(f3);
       f1.add(f2);
       f1.accept(new Visitor());
}