Question

On one hand I have coded a function in Scala that reads Excel Files. On the other I have different formats of reports: The first report will output certain informations, the second one will sum a few cells according to defined rules.

I struggle to model how those objects will interact together. What i have done for the moment is that the ExcelReader will take two arguments: a file input (filestream) and a trait for reports.

I was thinking to inject the report class and use the commmon trait createReport in the Excel Reader. Is it a good practice?

My other question is which object should i pass to this createReport method. Is it better to pass a List? an Array? I am not too sure which is the best object to model an excel sheet or if it is better to create my own object.

Thank you

Regards

Answer 1

What do you interpret from Excel? It can be quite complex I guess, but for start you could try:

type ColIndex = String // maybe Int
type RowIndex = Int

sealed trait Cell
case class TextCell(text: String) extends Cell
case class NumericCell(value: BigDecimal) extends Cell
// maybe later if needed:
// case class FunctionCell(function: SomeExcelExpressionType) extends Cell

type ExcelData = Map[(ColIndex, RowIndex), Cell]