zio.json.JsonError.scala Maven / Gradle / Ivy
/*
* Copyright 2019-2022 John A. De Goes and the ZIO Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package zio.json
/**
* A `JsonError` value describes the ways in which decoding could fail. This structure is used
* to facilitate human-readable error messages during decoding failures.
*/
sealed abstract class JsonError
object JsonError {
def render(trace: List[JsonError]): String =
trace.reverse.map {
case Message(txt) => s"($txt)"
case ArrayAccess(i) => s"[$i]"
case ObjectAccess(field) => s".$field"
case SumType(cons) => s"{$cons}"
}.mkString
final case class Message(txt: String) extends JsonError
final case class ArrayAccess(i: Int) extends JsonError
final case class ObjectAccess(field: String) extends JsonError
final case class SumType(cons: String) extends JsonError
}