Visitor_Exercise.cs

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using System;
 
namespace DesignPatternExamples_csharp
{
    internal class Visitor_Exercise
    {
        // ! [Using Visitor in C#]
        public void Run()
        {
            Console.WriteLine();
            Console.WriteLine("Visitor Exercise");
 
            Console.WriteLine("  Creating Village");
            Village village = new Village();
            village.LoadVillage();
 
            OrderVisitor visitor = new OrderVisitor(new string[] { "hamburger" });
            Console.WriteLine("  Ordering a hamburger from a shop in the {0}", village.Name);
            // Visit all shops and place an order for a hamburger at the shop
            // that sells them.  We don't know which shop it is and we don't
            // need to know until we receive the order.
            village.Accept(visitor);
            if (visitor.ItemsReceived.Count > 0)
            {
                // We are expecting only a single item
                Console.WriteLine("  We received a {0} from {1}.",
                    visitor.ItemsReceived[0], visitor.ShopNameReceivedFrom);
            }
            else
            {
                Console.WriteLine("  Failed to receive a hamburger");
            }
 
            Console.WriteLine("  Done.");
        }
        // ! [Using Visitor in C#]
 
    }
}