Hi,
I am developing Inventory control system. In my design, it should able to manage multiple type of product such as normal item (such as cann food), serialno'ism' item (such as electrical ite, mobile device) and matrix item (such as fashion item, clothes).

For these 3 different type of item, there have different/same attributes for example:
normal item : SKU, Barcode
serialno item : SKU, Barcode (may be), serial no, model
matrix item : SKU, BarCode (different colour/size will have different barcode generated), ColourCode, SizeCode, Model

My question is, how to design classes that able to handle these 3 items (ex. while collecting data, display data, validate data) with same interface without DO CASE ...ENDCASE in all around my UI/Business layer?

I used to think about strategy patttern, however, It still seem DO CASE ...ENCASE is required in UI level while collecting/doisplay data.

Any ideas, or example for similar problems?

Thank you