nullIsNameAsDefault does not work when inheritance.

[hohoins]

nullIsNameAsDefault does not work when inheritance.

In general, nullIsNameAsDefault works well. However, if you receive inheritance, it will not work. In the example below, responseC generates an error. Did I do something wrong?

Thank you very much.

Environment: android with retrofit2

` import com.fasterxml.jackson.databind.DeserializationFeature import com.fasterxml.jackson.databind.ObjectMapper import com.fasterxml.jackson.module.kotlin.KotlinModule

object JacksonTest { // android with retrofit2 // implementation "com.squareup.retrofit2:converter-jackson:2.9.0" // implementation "com.fasterxml.jackson.module:jackson-module-kotlin:2.12.2"

fun test() {
    val objectMapper = ObjectMapper()
    objectMapper.registerModule(KotlinModule(nullIsSameAsDefault = true))
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)

    val responseA = "{\"baseData\":\"data1\",\"myData\":\"data2\"}"
    val responseB = "{\"baseData\":\"data1\",\"myData\":null}"
    val responseC = "{\"baseData\":null,\"myData\":\"data2\"}"

    val successObjA = objectMapper.readValue(responseA, MyClass::class.java)
    val successObjB = objectMapper.readValue(responseB, MyClass::class.java)
    val failObjC = objectMapper.readValue(responseC, MyClass::class.java)
    // Caused by: com.fasterxml.jackson.databind.JsonMappingException: Parameter specified as non-null is null:
    // method kotlin.jvm.internal.Intrinsics.checkNotNullParameter, parameter <set-?>
}

}

open class BaseClass(var baseData: String = "baseDataDefault")

class MyClass(val myData: String = "myDataDefault") : BaseClass() `