A Kotlin recursive function

 import kotlin.reflect.full.memberProperties

data class Abc(

    val a: String,

    val b: String,

    val c: String,

    val d: D,

    val e: E

) {

    data class D(

        val e: String,

        val f: String,

        val g: String

    )

    data class E(

        val h: List<String>

    )

}

data class Xyz(

    val a: String,

    val b: String,

    val c: String,

    val d: D,

    val e: E

) {

    data class D(

        val e: String,

        val f: String,

        val g: G

    ){

        data class G(

            val h: String,

            val i: String

        )

    }

    data class E(

        val h: List<String>

    )

}

fun hasContent(inVal: Any): Boolean {

    if (inVal::class.simpleName == "String") {

        if (inVal != "") {

            return true

        }

    } else {

        inVal::class.memberProperties.forEach { ele ->

            if (ele.returnType.classifier == String::class) {

                if (ele.call(inVal) != "") {

                    return true

                }

            }

            else if (ele.returnType.classifier == List::class) {

                val list = ele.call(inVal) as List<*>

                val listCheck = list.map { hasContent(it!!) }

                if (listCheck.contains(true)) {

                    return true

                }

            }

            else {

                if (hasContent(ele.call(inVal)!!)) {

                        return true

                    }

                }

        }

        return false

    }

    return false

}

fun main() {

    // aa has content, should print true

    val aa = Abc("a1", "b2", "c3", Abc.D("e4", "f5", "g6"), Abc.E(listOf("h7", "i8", "j9")))

    println(" aa has content -> ${hasContent(aa)}")

    // bb has no content, should print false

    val bb = Abc("", "", "", Abc.D("", "", ""), Abc.E(listOf("", "", "")))

    println(" bb has content -> ${hasContent(bb)}")

    // cc has content, should print true

    val cc = Abc("", "", "", Abc.D("e4", "", ""), Abc.E(listOf("", "", "j9")))

    println(" cc has content -> ${hasContent(cc)}")

    // dd has content, should print true

    val dd = Abc("", "", "", Abc.D("", "", ""), Abc.E(listOf("", "", "j9")))

    println(" dd has content -> ${hasContent(dd)}")

    // xx has no content, should print false.

    val xx = Xyz("", "", "", Xyz.D("", "", Xyz.D.G("", "")), Xyz.E(listOf("", "", "")))

    println(" xx has content -> ${hasContent(xx)}")

    // yy has content, should print true.

    val yy = Xyz("", "", "", Xyz.D("", "", Xyz.D.G("", "")), Xyz.E(listOf("", "", "blahblah")))

    println(" yy has content -> ${hasContent(yy)}")

    // zz has content, should print true.

    val zz = Xyz("", "", "", Xyz.D("", "", Xyz.D.G("", "blahblah")), Xyz.E(listOf("", "", "")))

    println(" zz has content -> ${hasContent(zz)}")

}