Kotlin data class with second constructor !

Request.kt

@NoArg
@JsonIgnoreProperties(ignoreUnknown = true)
data class Request(
    var AAA: String?,
    var BBB : String?,
    var CCC: String?
) {
    constructor(raw: String): this(null,null, null) {
        val mapper = jacksonObjectMapper()
        val request = mapper.readValue<Request>(raw)

        this.AAA = request.AAA
        this.BBB = request.BBB
        this.CCC = request.CCC
    }
}