json-lenses example

.gitignore

/.idea/
/project/boot/
/project/plugins/project
target/
lib_managed/
src_managed/
test-output/
*.iml

build.properties

sbt.version=0.12.1

build.sbt

libraryDependencies ++= Seq(
  "io.spray" %% "spray-json" % "1.2.2",
  "net.virtual-void" %% "json-lenses" % "0.5.1"
)

ExtraPartOfJson.scala

import spray.json.{DefaultJsonProtocol, JsonParser}
import spray.json.lenses.JsonLenses._

case class Bird(name:  String, color:  String)
case class Birds(german: String, birds: List[Bird])
case class Ecosystem(ecoSystem: String, birds:  Birds)

object BirdJsonProtocol extends DefaultJsonProtocol {
  implicit val BirdFormat = jsonFormat(Bird, "name", "color")
  implicit val BirdsFormat = jsonFormat(Birds, "german", "birds")
  implicit val EcosystemFormat = jsonFormat(Ecosystem, "ecoSystem", "birds")
}

object ExtraPartOfJson extends App {
  val jsonString =
    """{
      |  "ecoSystem": "garden",
      |  "birds": {
      |    "german": "Voegel",
      |    "birds": [{
      |      "name": "Amsel",
      |      "color": "black"
      |    }, {
      |      "name": "Bussard",
      |      "color": "brown"
      |    }]
      |  }
      |}""".stripMargin

  val json = JsonParser(jsonString)
  println(json.prettyPrint)

  import BirdJsonProtocol._

  // in spray-routing use:
  // result.entity.as[Ecosystem]

  val ecosystem = json.as[Ecosystem]

  println(ecosystem)
}