Hey guys! I am working on Spring Reactive using Ko...

# announcements

[nicholasnet]

Hey guys! I am working on Spring Reactive using Kotlin. I am trying to find the best solution to get the id property value of generic T this is my code.

class BaseRepository(val client: DatabaseClient, val dataAccessStrategy: ReactiveDataAccessStrategy) {

    suspend inline fun <reified T> save(entity: T): T {

        val id = // How to get the id of entity?
        try {

            return client.insert()
                         .into(T::class.java)
                         .using(entity)
                         .map(dataAccessStrategy.converter.populateIdIfNecessary(entity))
                         .awaitOne()

        } catch (exception: Exception) {

            throw exception
        }
    }
}

What is the best approach to get the id of entity here?

[Brian Dilley]

T : IdentifiableObject where IdentifiableObject has an ID property. But then all of your entities have to implement that interface.

[nicholasnet]

Yeah I was trying to avoid that. Seems like I have to dig more into Spring code to figure out how to do this.

[Matteo Mirk]

If you don’t want to implement an interface then you have to resort to reflection.

[E.Kisaragi]

why do you want to avoid impl or extend member that forces having id property to children???
don't use reflection unless it can't be done by other methods