Map different value to the case class property during serialization and deserialization using Jackson - scala

Question

I am trying to deserialize this JSON using Jackson library -
{
"name": "abc",
"ageInInt": 30
}
To the case class Person
case class Person(name: String, #JsonProperty(value = "ageInInt")#JsonAlias(Array("ageInInt")) age: Int)
but I am getting -
No usable value for age
Did not find value which can be converted into int
org.json4s.package$MappingException: No usable value for age
Did not find value which can be converted into int
Basically, I want to deserialize the json with the different key fields ageInInt to age.
here is the complete code -
val json =
"""{
|"name": "Tausif",
|"ageInInt": 30
|}""".stripMargin
implicit val format = DefaultFormats
println(Serialization.read[Person](json))

Answer 1

You need to register DefaultScalaModule to your JsonMapper.
import com.fasterxml.jackson.databind.json.JsonMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.core.`type`.TypeReference
import com.fasterxml.jackson.annotation.JsonProperty
val mapper = JsonMapper.builder()
.addModule(DefaultScalaModule)
.build()
case class Person(name: String, #JsonProperty(value = "ageInInt") age: Int)
val json =
"""{
|"name": "Tausif",
|"ageInInt": 30
|}""".stripMargin
val person: Person = mapper.readValue(json, new TypeReference[Person]{})
println(person) // Prints Person(Tausif,30)