Visitor

PatternsComportamentais/PatternsComportamentais.sln

@@ -23,6 +23,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Strategy", "Strategy\Strate
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TemplateMethod", "TemplateMethod\TemplateMethod.csproj", "{EC0C8F7F-7972-4360-9F32-FDE0585D149D}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Visitor", "Visitor\Visitor.csproj", "{D77A7D55-7F89-4427-89BF-B46742169300}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -69,6 +71,10 @@ Global
 		{EC0C8F7F-7972-4360-9F32-FDE0585D149D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EC0C8F7F-7972-4360-9F32-FDE0585D149D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EC0C8F7F-7972-4360-9F32-FDE0585D149D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D77A7D55-7F89-4427-89BF-B46742169300}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D77A7D55-7F89-4427-89BF-B46742169300}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D77A7D55-7F89-4427-89BF-B46742169300}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D77A7D55-7F89-4427-89BF-B46742169300}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

PatternsComportamentais/Visitor/ConcreteElementA.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Visitor
+{
+    public class ConcreteElementA : Element
+    {
+        public override void Accept(Visitor visitor)
+        {
+            visitor.VisitConcreteElementA(this);
+        }
+
+        public void OperationA()
+        {
+
+        }
+    }
+}

PatternsComportamentais/Visitor/ConcreteElementB.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Visitor
+{
+    public class ConcreteElementB : Element
+    {
+        public override void Accept(Visitor visitor)
+        {
+            visitor.VisitConcreteElementB(this);
+        }
+
+        public void OperationB()
+        {
+
+        }
+    }
+}

PatternsComportamentais/Visitor/ConcreteVisitor1.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Visitor
+{
+    public class ConcreteVisitor1 : Visitor
+    {
+        public override void VisitConcreteElementA(ConcreteElementA concreteElementA)
+        {
+            Console.WriteLine($"{concreteElementA.GetType().Name} visitado por {this.GetType().Name}");
+        }
+
+        public override void VisitConcreteElementB(ConcreteElementB concreteElementB)
+        {
+            Console.WriteLine($"{concreteElementB.GetType().Name} visitado por {this.GetType().Name}");
+        }
+    }
+}

PatternsComportamentais/Visitor/ConcreteVisitor2.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Visitor
+{
+    public class ConcreteVisitor2 : Visitor
+    {
+        public override void VisitConcreteElementA(ConcreteElementA concreteElementA)
+        {
+            Console.WriteLine($"{concreteElementA.GetType().Name} visitado por {this.GetType().Name}");
+        }
+
+        public override void VisitConcreteElementB(ConcreteElementB concreteElementB)
+        {
+            Console.WriteLine($"{concreteElementB.GetType().Name} visitado por {this.GetType().Name}");
+        }
+    }
+}

PatternsComportamentais/Visitor/Element.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace Visitor
+{
+    public abstract class Element
+    {
+        public abstract void Accept(Visitor visitor);
+    }
+}

PatternsComportamentais/Visitor/ObjectStruture.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+
+namespace Visitor
+{
+    public class ObjectStruture
+    {
+        private List<Element> elementos = new List<Element>();
+
+        public void Anexar(Element elemento)
+        {
+            this.elementos.Add(elemento);
+        }
+
+        public void Desanexar(Element elemento)
+        {
+            this.elementos.Remove(elemento);
+        }
+
+        public void Accept(Visitor visitor)
+        {
+            foreach (Element elemento in this.elementos)
+            {
+                elemento.Accept(visitor);
+            }
+        }
+    }
+}

PatternsComportamentais/Visitor/Program.cs

@@ -0,0 +1,20 @@
+using System;
+
+namespace Visitor
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var o = new ObjectStruture();
+            o.Anexar(new ConcreteElementA());
+            o.Anexar(new ConcreteElementB());
+
+            var v1 = new ConcreteVisitor1();
+            var v2 = new ConcreteVisitor2();
+
+            o.Accept(v1);
+            o.Accept(v2);
+        }
+    }
+}

PatternsComportamentais/Visitor/Visitor.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace Visitor
+{
+    public abstract class Visitor
+    {
+        public abstract void VisitConcreteElementA(ConcreteElementA concreteElementA);
+
+        public abstract void VisitConcreteElementB(ConcreteElementB concreteElementB);
+    }
+}

PatternsComportamentais/Visitor/Visitor.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>