State

PatternsComportamentais/PatternsComportamentais.sln

@@ -11,11 +11,13 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Interpreter", "Interpreter\
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Iterator", "Iterator\Iterator.csproj", "{DDA2348A-5257-4E65-9400-2C95DE6F6514}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mediator", "Mediator\Mediator.csproj", "{4898D85D-190C-4B86-B905-C66EB661CCF2}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Mediator", "Mediator\Mediator.csproj", "{4898D85D-190C-4B86-B905-C66EB661CCF2}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Memento", "Memento\Memento.csproj", "{189CDE42-E8FF-4D76-851B-321F75172835}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Memento", "Memento\Memento.csproj", "{189CDE42-E8FF-4D76-851B-321F75172835}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Observer", "Observer\Observer.csproj", "{88C5750D-1C94-49EA-9402-81EC6DB545AC}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Observer", "Observer\Observer.csproj", "{88C5750D-1C94-49EA-9402-81EC6DB545AC}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "State", "State\State.csproj", "{D8399170-7DED-4CDC-8FB9-03F3C91CD142}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -51,6 +53,10 @@ Global
 		{88C5750D-1C94-49EA-9402-81EC6DB545AC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{88C5750D-1C94-49EA-9402-81EC6DB545AC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{88C5750D-1C94-49EA-9402-81EC6DB545AC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D8399170-7DED-4CDC-8FB9-03F3C91CD142}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D8399170-7DED-4CDC-8FB9-03F3C91CD142}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D8399170-7DED-4CDC-8FB9-03F3C91CD142}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D8399170-7DED-4CDC-8FB9-03F3C91CD142}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

PatternsComportamentais/State/ConcreteStateA.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace State
+{
+    public class ConcreteStateA : State
+    {
+        public override void Handle(Context context)
+        {
+            context.State = new ConcreteStateB();
+        }
+    }
+}

PatternsComportamentais/State/ConcreteStateB.cs

@@ -0,0 +1,10 @@
+namespace State
+{
+    public class ConcreteStateB : State
+    {
+        public override void Handle(Context context)
+        {
+            context.State = new ConcreteStateA();
+        }
+    }
+}

PatternsComportamentais/State/Context.cs

@@ -0,0 +1,28 @@
+using System;
+
+namespace State
+{
+    public class Context
+    {
+        private State _state;
+        public State State
+        {
+            get { return _state; }
+            set
+            {
+                _state = value;
+                Console.WriteLine($"Estado: {_state.GetType().Name}");
+            }
+        }
+
+        public Context(State state)
+        {
+            _state = state;
+        }
+
+        public void Request()
+        {
+            _state.Handle(this);
+        }
+    }
+}

PatternsComportamentais/State/Program.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace State
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Context c = new Context(new ConcreteStateA());
+
+            c.Request();
+            c.Request();
+            c.Request();
+            c.Request();
+        }
+    }
+}

PatternsComportamentais/State/State.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace State
+{
+    public abstract class State
+    {
+        public abstract void Handle(Context context);
+    }
+}

PatternsComportamentais/State/State.csproj

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