Setting and Getting of Values using Scala Reflection - scala

Question

I have a patient resource of below type:
val p:Patient = new Patient
which comes under below package:
import org.hl7.fhir.r4.model.Patient
Now, I want to set some value for it like one ID attribute with value like example and when I try something like p.getId() I should be able to retrieve it. I was trying scala reflection and desgined below methods by referring one of the posts but not sure how to use it over here. Below are the methods for get and set:
object PatientInvoker {
def main(args: Array[String]): Unit = {
val spark = SparkSession.builder().appName("Patient").master("local[1]").getOrCreate()
val patientOutput = "C:\\Users\\siddheshk2\\IdeaProjects\\fhir\\mapper\\src\\main\\resources\\patientOutput.json"
val idValue = spark.read.option("multiline", "true").json(patientOutput).select(col("id")).first.getString(0)
implicit def reflector(ref: AnyRef) = new {
def getV(name: String): Any = ref.getClass.getMethods.find(_.getName == name).get.invoke(ref)
def setV(name: String, value: Any): Unit = ref.getClass.getMethods.find(_.getName == name + "_$eq").get.invoke(ref, value.asInstanceOf[AnyRef])
}
val p: Patient = new Patient
p.setV("id", idValue)
println("id:" + p.getV("id"))
}
}
I am getting below error:
Exception in thread "main" java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:347)
at scala.None$.get(Option.scala:345)
at com.fhir.mapper.io.PatientInvoker$$anon$1.setV(StudentInvoker.scala:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
Unable to set value of idValue using reflector method. Please guide me through it