Scala 2: Case class pattern matching to show error-CodePudding

I have a case class like this:

case class AEMError(
  authError: Option[AEMAuthError] = None,
  unexpectedError: Option[AEMUnexpectedError] = None,
                   )

I want to do a pattern matching like this:

def throwErrorAndLogMessage(error:AEMError,message:String):Unit={
    error match {
      case authError: Some[AEMAuthError] => {???}
      case unexpectedError: Some[AEMUnexpectedError] => {???}
      case _ => {???}
    }
  }

and add multiple case classes for different types of error but I am totally spinning on the syntax for case match can somebody help me here?

CodePudding user response：

With your definition of AEMError you can't do reasonable pattern matching because it possible to have both error present.

You should change AEMError to

sealed trait AEMError

case class AEMErrorAuth(authError: AEMAuthError) extends AEMError

case class AEMErrorUnexpected(authError: AEMUnexpectedError) extends AEMError

And use it like this:

  err match {
    case AEMErrorAuth(authError) => {
      print(authError)
    }
    case AEMErrorUnexpected(unexpectedError) => {
      print(unexpectedError)
    }
  }

CodePudding user response：

If you can't change the signature of AEMError like @talex mentioned, you can try something like:

  def throwErrorAndLogMessage(error: AEMError, message: String): Unit = {
    error match {
      case AEMError(Some(authError), Some(unexpectedError)) => ???
      case AEMError(Some(authError), None) => ???
      case AEMError(None, Some(unexpectedError)) => ???
      case _ => ???
    }
  }