CODEWITHSUNDEEP
genericskotlin
Jeggy
Jeggy

Reputation: 1650

How to retrieve value from Singleton object via generics

I am trying to create a function that can take any singleton object in, and print it's properties with values.

Sample code:

object MyObject {
    val text = "Hello World"
}

inline fun <reified T: Any> printValues() = T::class
    .declaredMemberProperties
    .forEach {
        println(it.name + "=" + it.value) // value doesn't exist
    }


/* RUN */
fun main(args: Array<String>) {
    printValues<MyObject>()
}

Is it possible in kotlin to retrieve the value from MyObject in some generic way like this?

Upvotes: 1

Views: 182

Answers (1)

avolkmann
avolkmann

Reputation: 3105

How about something like this:

inline fun <reified T : Any> getObjectValues() = T::class
    .declaredMemberProperties
    .map { it.name to it.get(T::class.objectInstance!!) }

Basically what you need is to obtain an instance of T so that you can call get

Upvotes: 2

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