Tuesday, 15 October 2013

Chain of Responsibility Design pattern - Implementation(One or more Rece...



Click here to watch in Youtube : https://www.youtube.com/watch?v=tyGnCb-kE1I

Click the below Image to Enlarge
Chain of Responsibility Design pattern - Implementation
Chain of Responsibility Design pattern - Implementation - Class Diagram




































RsHandler.java

public abstract class RsHandler
{
RsHandler rsHandler;

public void nextHandler( RsHandler rsHandler )
{
this.rsHandler = rsHandler;
}

public abstract void dispatchRs( long requestedAmount );

}

HundredRsHandler.java

public class HundredRsHandler extends RsHandler
{

public void dispatchRs(long requestedAmount)
{
long numberofNotesToBeDispatched = requestedAmount / 100;
if (numberofNotesToBeDispatched > 0)
{
if(numberofNotesToBeDispatched>1)
{
System.out.println(numberofNotesToBeDispatched + " ,Hundred Rs notes are dispatched by HundredRsHandler\n");
}
else
{
System.out.println(numberofNotesToBeDispatched + " ,Hundred Rs note is dispatched by HundredRsHandler\n");

}
}

long pendingAmountToBeProcessed = requestedAmount % 100;

if (pendingAmountToBeProcessed > 0)
{
rsHandler.dispatchRs(pendingAmountToBeProcessed);

}

}

}

FiftyRsHandler.java

public class FiftyRsHandler extends RsHandler
{
public void dispatchRs(long requestedAmount)
{
long numberofNotesToBeDispatched = requestedAmount / 50;
if (numberofNotesToBeDispatched > 0)
{
if (numberofNotesToBeDispatched > 1)
{
System.out.println(numberofNotesToBeDispatched + " ,Fifty Rs notes are dispatched by FiftyRsHandler\n");
}
else
{
System.out.println(numberofNotesToBeDispatched + " ,Fifty Rs note is dispatched by FiftyRsHandler\n");

}

}

long pendingAmountToBeProcessed = requestedAmount % 50;

if (pendingAmountToBeProcessed > 0)
{
rsHandler.dispatchRs(pendingAmountToBeProcessed);

}

}
}


TwentyRsHandler.java

public class TwentyRsHandler extends RsHandler
{
public void dispatchRs(long requestedAmount)
{
long numberofNotesToBeDispatched = requestedAmount / 20;

if (numberofNotesToBeDispatched > 0)
{

if (numberofNotesToBeDispatched > 1)
{
System.out.println(numberofNotesToBeDispatched + " ,Twenty Rs notes are dispatched by TwentyRsHandler\n");
}
else
{
System.out.println(numberofNotesToBeDispatched + " ,Twenty Rs note is dispatched by TwentyRsHandler\n");

}
}

long pendingAmountToBeProcessed = requestedAmount % 20;

if (pendingAmountToBeProcessed > 0)
{
rsHandler.dispatchRs(pendingAmountToBeProcessed);

}

}
}


FiveRsHandler.java

public class FiveRsHandler extends RsHandler
{
public void dispatchRs(long requestedAmount)
{
long numberofNotesToBeDispatched = requestedAmount / 5;
if (numberofNotesToBeDispatched > 0)
{

if (numberofNotesToBeDispatched > 1)
{
System.out.println(numberofNotesToBeDispatched + " ,Five Rs notes are dispatched by FiveRsHandler\n");
}
else
{
System.out.println(numberofNotesToBeDispatched + " ,Five Rs note is dispatched by FiveRsHandler\n");

}
}

long pendingAmountToBeProcessed = requestedAmount % 5;

if (pendingAmountToBeProcessed > 0)
{
rsHandler.dispatchRs(pendingAmountToBeProcessed);

}

}
}


ATM.java

public class ATM
{
private static HundredRsHandler hundredRsHandler = new HundredRsHandler();
private static FiftyRsHandler   fiftyRsHandler   = new FiftyRsHandler();
private static TwentyRsHandler  twentyRsHandler  = new TwentyRsHandler();
private static FiveRsHandler    fiveRsHandler    = new FiveRsHandler();

static
{
// Prepare the chain of Handlers
hundredRsHandler.nextHandler(fiftyRsHandler);
fiftyRsHandler.nextHandler(twentyRsHandler);
twentyRsHandler.nextHandler(fiveRsHandler);
}

public void withdraw( long requestedAmount )
{

hundredRsHandler.dispatchRs(requestedAmount);
}
}


ChainOfResDemo.java

public class ChainOfResDemo
{

public static void main( String[] args )
{
ATM atm = new ATM();
System.out.println("\n ----------------Requested Amount 475-----------------------\n");
atm.withdraw(475);
System.out.println("\n ----------------Requested Amount 455-----------------------\n");
atm.withdraw(455);
System.out.println("\n ----------------Requested Amount 520-----------------------\n");
atm.withdraw(520);
}

}


Output

 ----------------Requested Amount 475-----------------------

4 ,Hundred Rs notes are dispatched by HundredRsHandler

1 ,Fifty Rs note is dispatched by FiftyRsHandler

1 ,Twenty Rs note is dispatched by TwentyRsHandler

1 ,Five Rs note is dispatched by FiveRsHandler


 ----------------Requested Amount 455-----------------------

4 ,Hundred Rs notes are dispatched by HundredRsHandler

1 ,Fifty Rs note is dispatched by FiftyRsHandler

1 ,Five Rs note is dispatched by FiveRsHandler


 ----------------Requested Amount 520-----------------------

5 ,Hundred Rs notes are dispatched by HundredRsHandler

1 ,Twenty Rs note is dispatched by TwentyRsHandler



No comments:

Post a Comment

Google+ Followers

Google+ Badge