Hi, I try to make a Builder in Kotlin, all was fin...

# announcements

[Jérôme Gully]

Hi,
I try to make a Builder in Kotlin, all was fine with this sample code I inspirate from, but my goal is to consume it in Java (Kotlin default parameters = Overload methods), so the Builder pattern in Kotlin is not usefull to use in Java with this sample code.
what alternatives I have ?

Builder

[florent]

https://stackoverflow.com/questions/36140791/how-to-implement-builder-pattern-in-kotlin

[Jérôme Gully]

Florent, my goal is to consume it in java. Tthe stakoverflow post don't talk about it

[Mike]

Look at this section of the docs anytime you're trying to do interop. Lots of cases covered. https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html#calling-kotlin-from-java

For you, I think @JvmOverloads may help.
https://kotlinlang.org/docs/reference/java-to-kotlin-interop.html#overloads-generation

[Jérôme Gully]

@JvmOverloads don't help, because its generate Overload methods (like I said in my initial post), so Builder pattern bring nothing if I must pass all "options" in parameters of the builder.

[Mike]

Sorry, didn't read closely enough.

Hmm. If the builder is only used in one Kotlin module, you could mark the constructor as internal .

Then the constructor name should be 'hidden' to Java by name mangling, so the only options would be the builder syntax. But you could still use it in Kotlin as-is.

[spaisey]

A friend has developed a Builder via annotation implementation: https://github.com/ThinkingLogic/kotlin-builder-annotation

[florent]

That was on the stackoverflow answer, I guess he isn't interested by this solution 🤷‍♂️