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Commit dc36677

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visitor pattern example
1 parent 1300f65 commit dc36677

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3 files changed

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-0
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3 files changed

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‎DesignPatterns.sln

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@@ -39,6 +39,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MementoPattern", "Memento\M
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ObserverPattern", "ObserverPattern\ObserverPattern.csproj", "{88754C6C-4DA4-4C4B-8E53-4DDD9425A387}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VisitorPattern", "VisitorPattern\VisitorPattern.csproj", "{C33B3A5D-E92B-455B-A9CD-4DFB6DF985A6}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{88754C6C-4DA4-4C4B-8E53-4DDD9425A387}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{88754C6C-4DA4-4C4B-8E53-4DDD9425A387}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{88754C6C-4DA4-4C4B-8E53-4DDD9425A387}.Release|Any CPU.Build.0 = Release|Any CPU
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{C33B3A5D-E92B-455B-A9CD-4DFB6DF985A6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{C33B3A5D-E92B-455B-A9CD-4DFB6DF985A6}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{C33B3A5D-E92B-455B-A9CD-4DFB6DF985A6}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{C33B3A5D-E92B-455B-A9CD-4DFB6DF985A6}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

‎VisitorPattern/Program.cs

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using System;
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namespace VisitorPattern
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{
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// Visitee
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interface IAnimal
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{
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void Accept(IAnimalOperation operation);
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}
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// Visitor
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interface IAnimalOperation
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{
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void VisitMonkey(Monkey monkey);
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void VisitLion(Lion lion);
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void VisitDolphin(Dolphin dolphin);
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}
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class Monkey : IAnimal
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{
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public void Shout()
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{
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Console.WriteLine("Oooh o aa aa!");
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}
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public void Accept(IAnimalOperation operation)
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{
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throw new NotImplementedException();
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}
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}
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class Lion : IAnimal
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{
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public void Roar()
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{
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Console.WriteLine("Roaar!");
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}
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public void Accept(IAnimalOperation operation)
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{
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throw new NotImplementedException();
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}
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}
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class Dolphin : IAnimal
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{
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public void Speak()
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{
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Console.WriteLine("Tuut tittu tuutt!");
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}
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public void Accept(IAnimalOperation operation)
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{
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throw new NotImplementedException();
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}
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}
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class Speak : IAnimalOperation
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{
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public void VisitDolphin(Dolphin dolphin)
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{
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dolphin.Speak();
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}
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public void VisitLion(Lion lion)
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{
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lion.Roar();
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}
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public void VisitMonkey(Monkey monkey)
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{
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monkey.Shout();
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}
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}
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class Jump : IAnimalOperation
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{
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public void VisitDolphin(Dolphin dolphin)
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{
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Console.WriteLine("Jumped 20 feet high! on to the tree!");
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}
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public void VisitLion(Lion lion)
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{
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Console.WriteLine("Jumped 7 feet! Back on the ground!");
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}
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public void VisitMonkey(Monkey monkey)
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{
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Console.WriteLine("Walked on water a little and disappeared!");
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}
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}
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class Program
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{
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static void Main(string[] args)
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{
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var monkey = new Monkey();
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var lion = new Lion();
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var dolphin = new Dolphin();
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var speak = new Speak();
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monkey.Accept(speak); // Ooh oo aa aa!
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lion.Accept(speak); // Roaaar!
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dolphin.Accept(speak); // Tuut tutt tuutt!
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var jump = new Jump();
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monkey.Accept(speak); // Ooh oo aa aa!
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monkey.Accept(jump); // Jumped 20 feet high! on to the tree!
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lion.Accept(speak); // Roaaar!
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lion.Accept(jump); // Jumped 7 feet! Back on the ground!
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dolphin.Accept(speak); // Tuut tutt tuutt!
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dolphin.Accept(jump); // Walked on water a little and disappeared
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Console.ReadLine();
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}
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}
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}

‎VisitorPattern/VisitorPattern.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp2.0</TargetFramework>
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</PropertyGroup>
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</Project>

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