Add toDataFrame(KClass) overload to convert type erased lists

[koperagen]

It's not new to have KType / KClass overloads next to inline reified APIs, so i believe this addition would be an easy one.

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[Jolanrensen]

good idea but missing some typing and overloads I think

[Jolanrensen]

I'd add some small KDocs for new public functions :) Also, maybe people want to specify roots/maxdepth as well, would that be possible here?

[Jolanrensen]

Also, since we supply a KClass<T> we can get the type information. If we have an Iterable<Any?>, we know we'll get a DataFrame<T>.

[Jolanrensen]

Finally, would it make sense to offer overloads with body: CreateDataFrameDsl<T>.() -> Unit too?

[koperagen]

Also, since we supply a KClass we can get the type information. If we have an Iterable<Any?>, we know we'll get a DataFrame.

If you have KClass with specific T, i'd say you might as well use list.toDataFrame() without KClass?

Finally, would it make sense to offer overloads with body: CreateDataFrameDsl.() -> Unit too?

Well, this overload is CreateDataFrameDsl<T>.() -> Unit = { properties() } so we'd need to combine them. Also it's supposed to be used when only runtime KClass<*> is available. What useful can be done with CreateDataFrameDsl<Any?>.() -> Unit?

Also, maybe people want to specify roots/maxdepth as well, would that be possible here?

roots - no, because Any?. maxDepth - yes

[Jolanrensen]

If you have KClass with specific T, i'd say you might as well use list.toDataFrame() without KClass?

Hmm, I guess you're right. I first thought it might be possible to use another class as argument of toDataFrame(), then it would make sense to get T... However, that results in java.lang.IllegalArgumentException: object is not an instance of declaring class. It might be worth mentioning in attached KDocs that all elements in the iterable must be exact instances the KClass given.

[koperagen]

val entityManager = springContext.getBean(EntityManager::class.java)
entityManager.createQuery("select e from Owner e").resultList.toDataFrame()

another case when Iterable has Any? type