Created
September 4, 2018 16:36
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circe enumeration codec with better error message?
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| def enumEncoder[A <: Enumeration](a: A): Encoder[a.Value] = | |
| Encoder.encodeString.contramap[a.Value](_.toString) | |
| def enumDecoder[A <: Enumeration](a: A): Decoder[a.Value] = | |
| Decoder.decodeString.emap(s => | |
| try { | |
| Right(a.withName(s)) | |
| } catch { | |
| case _: NoSuchElementException => Left(s"Invalid enumeration value, valid values are: ${a.values}") | |
| }) | |
| implicit val encodeDocumentType: Encoder[DocumentType.Value] = enumEncoder(DocumentType) | |
| implicit val decodeDocumentType: Decoder[DocumentType.Value] = enumDecoder(DocumentType) |
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