Print a declarative string of given object.

logMemberProps.kt

    @Test
    fun testSoSo() {
        val car = Car("me.car\ndmsklam", Engine("me.engine"), Wheel("me.wheel"))
        println(printlnStr(car))
        //OUTPUT:
//        Car(
//            engine = Engine(
//                name = "me.engine"
//            ),
//            name = "me.car\ndmsklam",
//            wheel = listOf(
//                Wheel(
//                    name = "me.wheel"
//                )
//            )
//        )
    }

    // The given object may be created from other forms, such as XML, JSON...
    // This method will output a declaration string that creats the given object in Kotlin form.
    private fun printlnStr(obj: Any?): String {
        if (obj == null) return "null"
        if (obj is String) return "\"${obj.replace("\n", "", true)}\""
        val content: MutableList<String> = mutableListOf()
        val propList = obj.javaClass.kotlin.memberProperties
        val retStr: String = if (obj is List<*>) {
            val list: List<*> = obj
            for (elem in list) {
                val tempStr = printlnStr(elem)
                content.add("\n$tempStr")
            }
            "listOf(${content.joinToString()}\n)"
        } else {
            for (prop in propList) {
                val tempStr = printlnStr(prop.get(obj))
                content.add("\n${prop.name} = $tempStr")
            }
            "${obj.javaClass.name}(${content.joinToString()}\n)"
        }

        return retStr
    }