git-svn-id: http://mokhan.googlecode.com/svn/trunk@9 a0a4a051-f042-0410-9e78-9fae330bdb64

14 files changed, 452 insertions, 0 deletions

diff --git a/DesignPatterns/src/app/DesignPatterns.State/AmountEnteredState.cs b/DesignPatterns/src/app/DesignPatterns.State/AmountEnteredState.cs
new file mode 100644
index 0000000..ec27fdc
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/AmountEnteredState.cs
@@ -0,0 +1,32 @@
+using System;

+

+namespace DesignPatterns.State {

+	public class AmountEnteredState : IState {

+		public AmountEnteredState( IPosTerminal terminal ) {

+			_terminal = terminal;

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			Console.Out.WriteLine( "You've already swiped a card!" );

+		}

+

+		public void EnterAmount( double amount ) {

+			Console.Out.WriteLine( "You've already entered an amount" );

+		}

+

+		public void EnterPin( string pin ) {

+			_terminal.Transaction.Pin = pin;

+			_terminal.CurrentState = new PinEnteredState( _terminal );

+		}

+

+		public void ProcessTransaction( ) {

+			Console.Out.WriteLine( "You haven't entered an amount yet." );

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine( "You haven't entered an amount yet." );

+		}

+

+		private IPosTerminal _terminal;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/CardSwipedState.cs b/DesignPatterns/src/app/DesignPatterns.State/CardSwipedState.cs
new file mode 100644
index 0000000..ee3a24a
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/CardSwipedState.cs
@@ -0,0 +1,32 @@
+using System;

+

+namespace DesignPatterns.State {

+	public class CardSwipedState : IState {

+		public CardSwipedState( IPosTerminal terminal ) {

+			_terminal = terminal;

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			Console.Out.WriteLine( "You already swiped a card" );

+		}

+

+		public void EnterAmount( double amount ) {

+			_terminal.Transaction.Amount = amount;

+			_terminal.CurrentState = new AmountEnteredState( _terminal );

+		}

+

+		public void EnterPin( string pin ) {

+			Console.Out.WriteLine( "You haven't swiped a card yet!" );

+		}

+

+		public void ProcessTransaction( ) {

+			Console.Out.WriteLine( "You haven't swiped a card yet!" );

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine( "You haven't swiped a card yet!" );

+		}

+

+		private IPosTerminal _terminal;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/DesignPatterns.State.csproj b/DesignPatterns/src/app/DesignPatterns.State/DesignPatterns.State.csproj
new file mode 100644
index 0000000..faa7708
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/DesignPatterns.State.csproj
@@ -0,0 +1,58 @@
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

+  <PropertyGroup>

+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>

+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>

+    <ProductVersion>8.0.50727</ProductVersion>

+    <SchemaVersion>2.0</SchemaVersion>

+    <ProjectGuid>{21E02E54-3D4F-457A-B521-D2472ABC55CE}</ProjectGuid>

+    <OutputType>Library</OutputType>

+    <AppDesignerFolder>Properties</AppDesignerFolder>

+    <RootNamespace>DesignPatterns.State</RootNamespace>

+    <AssemblyName>DesignPatterns.State</AssemblyName>

+  </PropertyGroup>

+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">

+    <DebugSymbols>true</DebugSymbols>

+    <DebugType>full</DebugType>

+    <Optimize>false</Optimize>

+    <OutputPath>bin\Debug\</OutputPath>

+    <DefineConstants>DEBUG;TRACE</DefineConstants>

+    <ErrorReport>prompt</ErrorReport>

+    <WarningLevel>4</WarningLevel>

+  </PropertyGroup>

+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">

+    <DebugType>pdbonly</DebugType>

+    <Optimize>true</Optimize>

+    <OutputPath>bin\Release\</OutputPath>

+    <DefineConstants>TRACE</DefineConstants>

+    <ErrorReport>prompt</ErrorReport>

+    <WarningLevel>4</WarningLevel>

+  </PropertyGroup>

+  <ItemGroup>

+    <Reference Include="System" />

+    <Reference Include="System.Data" />

+    <Reference Include="System.Xml" />

+  </ItemGroup>

+  <ItemGroup>

+    <Compile Include="AmountEnteredState.cs" />

+    <Compile Include="CardSwipedState.cs" />

+    <Compile Include="IdleState.cs" />

+    <Compile Include="IPosTerminal.cs" />

+    <Compile Include="IPosTransaction.cs" />

+    <Compile Include="IState.cs" />

+    <Compile Include="PinEnteredState.cs" />

+    <Compile Include="PosTerminal.cs" />

+    <Compile Include="PosTransaction.cs" />

+    <Compile Include="ProcessingTransactionState.cs" />

+    <Compile Include="Properties\AssemblyInfo.cs" />

+    <Compile Include="TransactionApprovedState.cs" />

+    <Compile Include="TransactionRejectedState.cs" />

+  </ItemGroup>

+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />

+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 

+       Other similar extension points exist, see Microsoft.Common.targets.

+  <Target Name="BeforeBuild">

+  </Target>

+  <Target Name="AfterBuild">

+  </Target>

+  -->

+</Project>
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/IPosTerminal.cs b/DesignPatterns/src/app/DesignPatterns.State/IPosTerminal.cs
new file mode 100644
index 0000000..0e65d89
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/IPosTerminal.cs
@@ -0,0 +1,19 @@
+namespace DesignPatterns.State {

+	public interface IPosTerminal {

+		void SwipeCard( string cardNumber );

+

+		void EnterAmount( double amount );

+

+		void EnterPin( string pin );

+

+		void AuthorizeTransaction( );

+

+		void PrintReceipt( );

+

+		void ProcessTransaction( );

+

+		IState CurrentState { get; set; }

+

+		IPosTransaction Transaction { get; set; }

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/IPosTransaction.cs b/DesignPatterns/src/app/DesignPatterns.State/IPosTransaction.cs
new file mode 100644
index 0000000..f2ff5cc
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/IPosTransaction.cs
@@ -0,0 +1,13 @@
+using System;

+

+namespace DesignPatterns.State {

+	public interface IPosTransaction {

+		string Pin { get; set; }

+

+		double Amount { get; set; }

+

+		string CardNumber { get; set; }

+

+		DateTime Date { get; set; }

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/IState.cs b/DesignPatterns/src/app/DesignPatterns.State/IState.cs
new file mode 100644
index 0000000..9a2baac
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/IState.cs
@@ -0,0 +1,13 @@
+namespace DesignPatterns.State {

+	public interface IState {

+		void ProcessTransaction( );

+

+		void PrintReceipt( );

+

+		void SwipeCard( string cardNumber );

+

+		void EnterAmount( double amount );

+

+		void EnterPin( string pin );

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/IdleState.cs b/DesignPatterns/src/app/DesignPatterns.State/IdleState.cs
new file mode 100644
index 0000000..52b2bc6
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/IdleState.cs
@@ -0,0 +1,37 @@
+using System;

+

+namespace DesignPatterns.State {

+	public class IdleState : IState {

+		public IdleState( IPosTerminal terminal ) {

+			_terminal = terminal;

+

+			Console.Out.WriteLine( "Mo's POS TERMINAL" );

+			Console.Out.WriteLine( "Please swipe a card:" );

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			_terminal.Transaction = new PosTransaction( );

+			_terminal.Transaction.Date = DateTime.Now;

+			_terminal.Transaction.CardNumber = cardNumber;

+			_terminal.CurrentState = new CardSwipedState( _terminal );

+		}

+

+		public void EnterAmount( double amount ) {

+			Console.Out.WriteLine( "Please swipe a card first." );

+		}

+

+		public void EnterPin( string pin ) {

+			Console.Out.WriteLine( "Please swipe a card first." );

+		}

+

+		public void ProcessTransaction( ) {

+			Console.Out.WriteLine( "Please swipe a card first." );

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine( "Please swipe a card first." );

+		}

+

+		private IPosTerminal _terminal;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/PinEnteredState.cs b/DesignPatterns/src/app/DesignPatterns.State/PinEnteredState.cs
new file mode 100644
index 0000000..809186a
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/PinEnteredState.cs
@@ -0,0 +1,31 @@
+using System;

+

+namespace DesignPatterns.State {

+	public class PinEnteredState : IState {

+		public PinEnteredState( IPosTerminal terminal ) {

+			_terminal = terminal;

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			Console.Out.WriteLine( "You've already swiped a card." );

+		}

+

+		public void EnterAmount( double amount ) {

+			Console.Out.WriteLine( "You've already entered an amount." );

+		}

+

+		public void EnterPin( string pin ) {

+			Console.Out.WriteLine( "You've already entered a pin." );

+		}

+

+		public void ProcessTransaction( ) {

+			_terminal.CurrentState = new ProcessingTransactionState( _terminal );

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine( "The transaction needs to be authorized first" );

+		}

+

+		private IPosTerminal _terminal;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/PosTerminal.cs b/DesignPatterns/src/app/DesignPatterns.State/PosTerminal.cs
new file mode 100644
index 0000000..4afe62a
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/PosTerminal.cs
@@ -0,0 +1,44 @@
+namespace DesignPatterns.State {

+	public class PosTerminal : IPosTerminal {

+		public PosTerminal( ) {

+			_currentState = new IdleState( this );

+		}

+

+		public IState CurrentState {

+			get { return _currentState; }

+			set { _currentState = value; }

+		}

+

+		public IPosTransaction Transaction {

+			get { return _transaction; }

+			set { _transaction = value; }

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			_currentState.SwipeCard( cardNumber );

+		}

+

+		public void EnterAmount( double amount ) {

+			_currentState.EnterAmount( amount );

+		}

+

+		public void EnterPin( string pin ) {

+			_currentState.EnterPin( pin );

+		}

+

+		public void AuthorizeTransaction( ) {

+			_currentState.ProcessTransaction( );

+		}

+

+		public void PrintReceipt( ) {

+			_currentState.PrintReceipt( );

+		}

+

+		public void ProcessTransaction( ) {

+			_currentState.ProcessTransaction( );

+		}

+

+		private IState _currentState;

+		private IPosTransaction _transaction;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/PosTransaction.cs b/DesignPatterns/src/app/DesignPatterns.State/PosTransaction.cs
new file mode 100644
index 0000000..b9d08d9
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/PosTransaction.cs
@@ -0,0 +1,30 @@
+using System;

+

+namespace DesignPatterns.State {

+	internal class PosTransaction : IPosTransaction {

+		public string Pin {

+			get { return _pin; }

+			set { _pin = value; }

+		}

+

+		public double Amount {

+			get { return _amount; }

+			set { _amount = value; }

+		}

+

+		public string CardNumber {

+			get { return _cardNumber; }

+			set { _cardNumber = value; }

+		}

+

+		public DateTime Date {

+			get { return _date; }

+			set { _date = value; }

+		}

+

+		private string _pin;

+		private double _amount;

+		private string _cardNumber;

+		private DateTime _date;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/ProcessingTransactionState.cs b/DesignPatterns/src/app/DesignPatterns.State/ProcessingTransactionState.cs
new file mode 100644
index 0000000..f91cae4
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/ProcessingTransactionState.cs
@@ -0,0 +1,37 @@
+using System;

+

+namespace DesignPatterns.State {

+	internal class ProcessingTransactionState : IState {

+		public ProcessingTransactionState( IPosTerminal terminal ) {

+			_terminal = terminal;

+		}

+

+		public void ProcessTransaction( ) {

+			if ( (++_counter % 5) == 0 ) {

+				_terminal.CurrentState = new TransactionRejectedState( _terminal );

+			}

+			else {

+				_terminal.CurrentState = new TransactionApprovedState( _terminal );

+			}

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine( "The transaction needs to be processed first" );

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			Console.Out.WriteLine( "You have already swiped a card" );

+		}

+

+		public void EnterAmount( double amount ) {

+			Console.Out.WriteLine( "You have already entered an amount" );

+		}

+

+		public void EnterPin( string pin ) {

+			Console.Out.WriteLine( "You have already entered a PIN" );

+		}

+

+		private readonly IPosTerminal _terminal;

+		private static int _counter;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/Properties/AssemblyInfo.cs b/DesignPatterns/src/app/DesignPatterns.State/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..584bd52
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/Properties/AssemblyInfo.cs
@@ -0,0 +1,35 @@
+using System.Reflection;

+using System.Runtime.CompilerServices;

+using System.Runtime.InteropServices;

+

+// General Information about an assembly is controlled through the following 

+// set of attributes. Change these attribute values to modify the information

+// associated with an assembly.

+[assembly: AssemblyTitle("DesignPatterns.State")]

+[assembly: AssemblyDescription("")]

+[assembly: AssemblyConfiguration("")]

+[assembly: AssemblyCompany("")]

+[assembly: AssemblyProduct("DesignPatterns.State")]

+[assembly: AssemblyCopyright("Copyright ©  2007")]

+[assembly: AssemblyTrademark("")]

+[assembly: AssemblyCulture("")]

+

+// Setting ComVisible to false makes the types in this assembly not visible 

+// to COM components.  If you need to access a type in this assembly from 

+// COM, set the ComVisible attribute to true on that type.

+[assembly: ComVisible(false)]

+

+// The following GUID is for the ID of the typelib if this project is exposed to COM

+[assembly: Guid("7ddf1e6a-6ca6-4775-8fd6-c63e38833f23")]

+

+// Version information for an assembly consists of the following four values:

+//

+//      Major Version

+//      Minor Version 

+//      Build Number

+//      Revision

+//

+// You can specify all the values or you can default the Revision and Build Numbers 

+// by using the '*' as shown below:

+[assembly: AssemblyVersion("1.0.0.0")]

+[assembly: AssemblyFileVersion("1.0.0.0")]

diff --git a/DesignPatterns/src/app/DesignPatterns.State/TransactionApprovedState.cs b/DesignPatterns/src/app/DesignPatterns.State/TransactionApprovedState.cs
new file mode 100644
index 0000000..cfedf2d
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/TransactionApprovedState.cs
@@ -0,0 +1,36 @@
+using System;

+

+namespace DesignPatterns.State {

+	public class TransactionApprovedState : IState {

+		public TransactionApprovedState( IPosTerminal terminal ) {

+			_terminal = terminal;

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			Console.Out.WriteLine( "The transaction was approved" );

+		}

+

+		public void EnterAmount( double amount ) {

+			Console.Out.WriteLine( "The transaction was approved" );

+		}

+

+		public void EnterPin( string pin ) {

+			Console.Out.WriteLine( "The transaction was approved" );

+		}

+

+		public void ProcessTransaction( ) {

+			Console.Out.WriteLine( "The transaction was approved" );

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine( "** Approved **" );

+			Console.Out.WriteLine( "Date: {0}", _terminal.Transaction.Date );

+			Console.Out.WriteLine( "Card Number: {0}", _terminal.Transaction.CardNumber );

+			Console.Out.WriteLine( "Amount: {0}", _terminal.Transaction.Amount );

+

+			_terminal.CurrentState = new IdleState( _terminal );

+		}

+

+		private IPosTerminal _terminal;

+	}

+}
\ No newline at end of file
diff --git a/DesignPatterns/src/app/DesignPatterns.State/TransactionRejectedState.cs b/DesignPatterns/src/app/DesignPatterns.State/TransactionRejectedState.cs
new file mode 100644
index 0000000..5a585a3
--- /dev/null
+++ b/DesignPatterns/src/app/DesignPatterns.State/TransactionRejectedState.cs
@@ -0,0 +1,35 @@
+using System;

+

+namespace DesignPatterns.State {

+	public class TransactionRejectedState : IState {

+		public TransactionRejectedState( IPosTerminal terminal ) {

+			_terminal = terminal;

+		}

+

+		public void SwipeCard( string cardNumber ) {

+			Console.Out.WriteLine( "The transaction was rejected" );

+		}

+

+		public void EnterAmount( double amount ) {

+			Console.Out.WriteLine( "The transaction was rejected" );

+		}

+

+		public void EnterPin( string pin ) {

+			Console.Out.WriteLine( "The transaction was rejected" );

+		}

+

+		public void ProcessTransaction( ) {

+			Console.Out.WriteLine( "The transaction was rejected" );

+		}

+

+		public void PrintReceipt( ) {

+			Console.Out.WriteLine("** Rejected **");

+			Console.Out.WriteLine("Date: {0}", _terminal.Transaction.Date);

+			Console.Out.WriteLine("Card Number: {0}", _terminal.Transaction.CardNumber);

+			Console.Out.WriteLine("Amount: {0}", _terminal.Transaction.Amount);		

+			_terminal.CurrentState = new IdleState( _terminal );

+		}

+

+		private IPosTerminal _terminal;

+	}

+}
\ No newline at end of file