tethys.readers.ReaderError.scala Maven / Gradle / Ivy

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package tethys.readers

import scala.util.control.NonFatal

final class ReaderError protected (
    message: String,
    cause: Throwable,
    field: String
) extends Exception(message, cause)

object ReaderError {
  def wrongJson(reason: String, cause: Throwable = null)(implicit
      fieldName: FieldName
  ): Nothing = {
    val field = fieldName.value()
    throw new ReaderError(
      message = s"Illegal json at '$field': $reason",
      cause = null,
      field = field
    )
  }

  def catchNonFatal[A](
      fun: => A
  )(implicit fieldName: FieldName): Either[ReaderError, A] = {
    try Right(fun)
    catch {
      case err: ReaderError => Left(err)
      case NonFatal(e) =>
        Left(
          new ReaderError(
            message = e.getMessage,
            cause = e,
            field = fieldName.value()
          )
        )
    }
  }
}