Kotlin Refleciton API

KotlinReflections.kt

package com.ruwanka.kotlin.reflections

import kotlin.reflect.full.declaredMemberProperties
import kotlin.reflect.full.functions
import kotlin.reflect.full.memberProperties

fun main(args: Array<String>) {

    // get access to KClass
    val kClass = Student::class

    // prints fully qualified name
    println(kClass)

    // prints all properties + member functions
    kClass.members.forEach { println(it) }

    // prints only properties
    kClass.memberProperties.forEach { println(it) }

    // prints only member functions
    kClass.functions.forEach { println(it) }

    // prints all constructors
    kClass.constructors.forEach { println(it) }

    // prints all declared member properties
    kClass.declaredMemberProperties.forEach { println(it) }

    // create new instance
    val studentConstructor = ::Student
    var highSchoolStudent = studentConstructor.call("Archie", 17, "Riverdale High")
    println(highSchoolStudent)

    // create new instance using callBy with parameter map
    val nameParam = studentConstructor.parameters.first { it.name == "name" }
    val ageParam = studentConstructor.parameters.first { it.name == "age" }
    val schoolParam = studentConstructor.parameters.first { it.name == "school" }

    highSchoolStudent = studentConstructor.callBy(mapOf(nameParam to "Betty", 
                                                        ageParam to 16, 
                                                        schoolParam to "RiverDale High"))
    println(highSchoolStudent)

    // create new instance using callBy with positions
    highSchoolStudent = studentConstructor.callBy(mapOf(studentConstructor.parameters[0] to "Veronica",
            studentConstructor.parameters[1] to 16,
            studentConstructor.parameters[2] to "RiverDale High"))
    println(highSchoolStudent)

    // accessing properties of runtime object
    val schoolProperty = Student::class.declaredMemberProperties.find { it.name == "school" }
    println(schoolProperty?.get(highSchoolStudent))
    
    // invoking functions
    val getRankFunc = highSchoolStudent::getRank
    getRankFunc.invoke()
    getRankFunc.call()
}