Planet7-extensions adds a couple of handy features to Planet7:
- Convert from
CsvRows to case classes and back again - Add case classes together (for summing up transactions, rectangular co-ordinates, etc)
The code is based on the excellent examples provided with Shapeless
Given:
case class ActualPerson(id: Int, firstName: String, surname: String, fee: BigDecimal)Converting a Row to a case class returns a Try, since there is a runtime element in the data conversion:
import planet7.extensions._
"ConvertTo case class from Row" in {
val row: Row = Row(Array("5", "Jeremiah", "Jones", "13.3"))
val triedPerson: Try[ActualPerson] = ConvertTo[ActualPerson].fromRow(row)
triedPerson.get mustEqual ActualPerson(5, "Jeremiah", "Jones", 13.3)
}We can always convert a case class to a Row, so no Try is needed here:
"ConvertTo to Row from case class" in {
val person = ActualPerson(5, "Jeremiah", "Jones", 13.3)
val row = ConvertFrom[ActualPerson].toRow(person)
row mustEqual Row(Array("5", "Jeremiah", "Jones", "13.3"))
}case class Transaction(accountId: String, desc: String, price: BigDecimal, lots: Int)
"Adding case classes sums Numerics, ORs Booleans and prefers the first nonEmpty String" in {
val buy = Transaction("1", "buy", -26.3, 20)
val sell = Transaction("1", "sell", 72.4, -30)
buy |+| sell mustEqual Transaction("1", "buy", 46.1, -10)
}