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| using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
abstract class Element
{
public abstract void Accept(Visitor v);
}
class Elem1 : Element
{
public override void Accept(Visitor v)
{
v.VisitElem1(this);
}
}
class Elem2 : Element
{
public override void Accept(Visitor v)
{
v.VisitElem2(this);
}
}
abstract class Visitor
{
public abstract void VisitElem1(Elem1 e1);
public abstract void VisitElem2(Elem2 e2);
}
class Visitor1 : Visitor
{
public override void VisitElem1(Elem1 e1)
{
Console.WriteLine(this.GetType().Name + " " + e1.GetType().Name);
}
public override void VisitElem2(Elem2 e2)
{
Console.WriteLine(this.GetType().Name + " " + e2.GetType().Name);
}
}
class Visitor2 : Visitor
{
public override void VisitElem1(Elem1 e1)
{
Console.WriteLine(this.GetType().Name + " " + e1.GetType().Name);
}
public override void VisitElem2(Elem2 e2)
{
Console.WriteLine(this.GetType().Name + " " + e2.GetType().Name);
}
}
class ObjStructure
{
private List<Element> elems = new List<Element>();
public void add(Element e)
{
elems.Add(e);
}
public void visit(Visitor v)
{
foreach (Element e in elems)
{
e.Accept(v);
}
}
}
class Client
{
public static void Main()
{
ObjStructure o = new ObjStructure();
o.add(new Elem1());
o.add(new Elem2());
o.visit(new Visitor1());
o.visit(new Visitor2());
Console.Read();
}
}
}
|
