static public IInvoice GetInvoice(int invoiceType)
{
IInvoice objInvoice;
if (invoiceType == 1)
{
objInvoice = new InvoiceWithHeader();
}
else if (invoiceType == 2)
{
objInvoice = new InvoiceWithoutHeader();
}
else
{
return(null);
}
return(objInvoice);
}
public static IInvoice GetInvoice(int invoiceType)
{
IInvoice objInvoice;
switch (invoiceType)
{
case 1: objInvoice = new InvoiceWithHeader(); break;
case 2: objInvoice = new InvoiceWithoutHeader(); break;
case 3: objInvoice = new InvoiceWithFooter(); break;
case 4: objInvoice = new InvoiceWithoutFooter(); break;
default:
objInvoice = null;
break;
}
return(objInvoice);
}
internal void Main()
{
//CREATION - FACTORY PATTERN
/*
* Learning Reference
* https://refactoring.guru/design-patterns/factory-method
* https://www.javatpoint.com/factory-method-design-pattern
*/
Console.WriteLine("CREATION - FACTORY PATTERN");
Console.WriteLine(">> With user input");
/*
* Client only knows about InvoiceCreator's GetInvoice/PerformAction,
* based on Type of Creator send as parameter
*/
InvoiceCreater invoice = new InvoiceCreater();
invoice.GetInvoice(invoiceType: EnumInvoiceType.WithHeader);
invoice.GetInvoice(invoiceType: EnumInvoiceType.WithOutHeader);
Console.WriteLine(Environment.NewLine + ">> WithOut user input");
/*
* Client only knows about InvoiceCreator's PerformAction,
* based on Type of Creator created
*/
AInvoiceCreater invoiceCreater;
invoiceCreater = new InvoiceWithHeader();
invoiceCreater.PerformAction();
invoiceCreater = new InvoiceWithoutHeader();
invoiceCreater.PerformAction();
/*
* New type of Invoice can be added later by just
* Creating Creator and Concreate Class
* InvoiceWithoutHeaderCreater * InvoiceWithoutHeader
*/
}
