What is the way to throw a parametrized exception in kotlin?

Question

I have two functions that invoke a code block with a try-catch like:

fun <R: Any> executeRestCall( block: () -> R ): R { try { return block() } catch (ex: RestClientException) { throw IllegalArgumentException(ex.message) } } fun <R: Any> executeProcessCall( block: () -> R ): R { try { return block() } catch (ex: RuntimeException) { throw IllegalStateException(ex.message) } }

I need to parametrize required exception. How can this function be refactored?

What is the benefit of these methods? All you end up doing is erasing the stack trace — EpicPandaForce
– EpicPandaForce, Commented Sep 27, 2021 at 15:09
Even ignoring the drawback about hiding the stacktrace, what exactly would be the benefit of extracting anything here? It looks like the resulting function would just be reinventing the try-catch block — Joffrey
– Joffrey, Commented Sep 27, 2021 at 15:10
Does this answer your question? How to catch many exceptions at the same time in Kotlin — Sweeper
– Sweeper, Commented Sep 27, 2021 at 15:19
Just call block() without ever using these methods, then delete these methods :D — EpicPandaForce
– EpicPandaForce, Commented Sep 27, 2021 at 15:53

Matt · Accepted Answer · 2021-09-27 15:14:35Z

I'm not sure what you mean by parametrize

However, if you're looking for a way to indicate what exception the function will throw similar to the way throws works in Java - you can use @Throws annotation in kotlin

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.jvm/-throws/

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