Hello, World! A small API design question: I'm ma...

# announcements

[bod]

Hello, World! A small API design question: I'm making a lib in Kotlin, and want to make it nice to use from Kotlin and Java. One method takes a date range as a parameter so I used a Pair<Date> for it. This way from Kotlin it's nice, you can do foobar(dateFrom to dateTo). But from Java you're going to have to do foobar(new kotlin.Pair<>(dateFrom, dateTo)) and now you need Kotlin in your dependencies for this to work - not cool. Ideally I'd like to have both to and not this Java issue... Ideas?

[tipsy]

I'm making a lib in Kotlin, and want to make it nice to use from Kotlin and Java

write it in java

[bod]

and how do you make to work in Java?

[Mark Murphy]

"and now you need Kotlin in your dependencies for this to work - not cool" -- AFAIK a runtime dependency is unavoidable if your library is in Kotlin. If you want to avoid the Kotlin runtime dependency, you would need to implement the library in Java via a foobar(Date, Date) method. You could offer a Kotlin wrapper library that has your foobar(Pair<Date>) API via an extension function.

[bod]

allright, well 🙂 I'll make a DateRange class then. Yeah the extension sounds good. Thanks

[louiscad]

You could also just use two parameters

[karelpeeters]

Also consider using .. instead of to if it's really a range.

[bod]

Actually this method already have more parameters, that's why an ad-hoc class is preferable.

[bod]

.. may be cool indeed yes