ZIO JSON

ZIO Json is a fast and secure JSON library with tight ZIO integration.

Introduction

The goal of this project is to create the best all-round JSON library for Scala:

• Performance to handle more requests per second than the incumbents, i.e. reduced operational costs.
• Security to mitigate against adversarial JSON payloads that threaten the capacity of the server.
• Fast Compilation no shapeless, no type astronautics.
• Future-Proof, prepared for Scala 3 and next-generation Java.
• Simple small codebase, concise documentation that covers everything.
• Helpful errors are readable by humans and machines.
• ZIO Integration so nothing more is required.

Installation

In order to use this library, we need to add the following line in our build.sbt file:

libraryDependencies += "dev.zio" %% "zio-json" % "0.3.0-RC8"

Example

Let's try a simple example of encoding and decoding JSON using ZIO JSON:

import zio.json._

sealed trait Fruit                   extends Product with Serializable
case class Banana(curvature: Double) extends Fruit
case class Apple(poison: Boolean)    extends Fruit

object Fruit {
  implicit val decoder: JsonDecoder[Fruit] =
    DeriveJsonDecoder.gen[Fruit]

  implicit val encoder: JsonEncoder[Fruit] =
    DeriveJsonEncoder.gen[Fruit]
}

val json1         = """{ "Banana":{ "curvature":0.5 }}"""
val json2         = """{ "Apple": { "poison": false }}"""
val malformedJson = """{ "Banana":{ "curvature": true }}"""

json1.fromJson[Fruit]
json2.fromJson[Fruit]
malformedJson.fromJson[Fruit]

List(Apple(false), Banana(0.4)).toJsonPretty