Jackson Kotlin Module Example

JacksonKotlinModuleExample.kt

import com.fasterxml.jackson.annotation.JsonProperty
import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper

fun main(args: Array<String>) {
//    val mapper = ObjectMapper().registerModule(KotlinModule())
//    val mapper = ObjectMapper().registerKotlinModule()
    val mapper = jacksonObjectMapper()
    val writer = mapper.writerWithDefaultPrettyPrinter()

    val json1 = writer.writeValueAsString(Data1(1, "Foo", "Bar"))
    val data1_1 = mapper.readValue(json1, Data1::class.java)
    val data2_1 = mapper.readValue(json1, Data2::class.java)
    println(json1)
    println()
    println(data1_1)
    println(data2_1)
    println()
    val json2 = writer.writeValueAsString(Data2(1, "Baz", "Qux"))
    val data1_2 = mapper.readValue(json2, Data1::class.java)
    val data2_2 = mapper.readValue(json2, Data2::class.java)
    println(json2)
    println()
    println(data1_2)
    println(data2_2)
}

data class Data1(val id: Int,
                 val first: String,
                 val last: String)

data class Data2(@JsonProperty("id") val a: Int,
                 @JsonProperty("first") val b: String,
                 @JsonProperty("last") val c: String)