Deserializing case classes with Jerkson (nested)

Question

Using a worksheet in the Eclipse Scala IDE (contains code and output).

This simple code gives a ClassNotFoundException. For some reason, it can't seem to find the Address class.

similar: Deserializing JSON into user-defined case classes with Jerkson (But their issue has to do with the Play framework and a parsing error)

import com.codahale.jerkson.Json._

object person {

  case class Address(city: String, state: String)
  case class Person(name: String, age: Int, addresses: Seq[Address])

  parse[Person]("""{"name":"James", "age":25, "addresses": [{"city":"New York", "state": "NY"}, {"city":"Brooklyn", "state": "NY"}]}""")
  //> java.lang.ClassNotFoundException: <empty>.person.Address
  //|   at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
  //|   at java.security.AccessController.doPrivileged(Native Method)
  //|   at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
  //|   at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  //|   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  //|   at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
  //|   at com.codahale.jerkson.util.CaseClassSigParser$.loadClass(CaseClassSigP
  //| arser.scala:186)
  //|   at com.codahale.jerkson.util.CaseClassSigParser$.typeRef2JavaType(CaseCl
  //| assSigParser.scala:143)
  //|   at com.codahale.jerkson.util.CaseClassSigParser$$anonfun$typeRef2JavaTyp
  //| e$1.apply(CaseClassSigParser.scala:146)
  //|   at com.codahale.jerkson.util.CaseClassSigParser$$anonfun$typeRef2JavaTyp
  //| e$1.apply(CaseClassSigParser.scala:146)
  //|   at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike
  //| .scala:233)
  //|   
  //| Output exceeds cutoff limit.

}

Having the same problem right now actually, do not wish to switch to lift-json though. — Wrench, Dec 08 '14 at 20:04

score 0 · Answer 1 · answered Oct 05 '13 at 15:55

I made it work by using the lift-json jar instead. See extracting values in the lift-json docs.

package com.example.json

import net.liftweb.json._

object HelloJson extends App {

  case class Address(city: String, state: String)
  case class Person(name: String, addresses: List[Address])

  implicit val formats = DefaultFormats
  val json = parse(""" { "name" : "Billy", "addresses" : [{"city": "New York", "state": "NY"}, {"city": "Washington", "state": "DC"}] } """)
  println(json.extract[Person])
}

Deserializing case classes with Jerkson (nested)

1 Answers1