Hi, I am trying to make custom annotation for Guice in kotlin codebase, it currenly doesn't recogniz...

# announcements

[Dias]

Hi, I am trying to make custom annotation for Guice in kotlin codebase, it currenly doesn't recognize kotlin annotations it seems. There was a suggestion to use kapt to make it work, but I am not sure what exactly should I do with it

[Casey Brooks]

Guice is a runtime DI library, kapt is for compile-time annotation processing. Do you have the annotation retention set to runtime?

@Retention(AnnotationRetention.RUNTIME)
annotation class CustomGuiceAnnotation

[Dias]

ah, I do have that set yeah

[Dias]

I use that annotation in primary constractor field and @Target is set to FIELD

[Dias]

I also tried using something like @field:CustomGuiceAnnotation at the injection side to no avail

[Casey Brooks]

The @Retention should go on the annotation class itself, right next to @Target, not on the constructor or a field

[Dias]

yeah I know

[Dias]

that’s what I did

[Dias]

I just wanted to tell you where I am using the annotation

[Casey Brooks]

Ah, got it. I am inclined to say that the annotation itself is not the issue, and that your setup with Guice is the problem. Does the same annotation work as expected if it’s in Java?

[Dias]

I didn’t try to use in in Java, our codebase is fully kotlin

[Dias]

@Named annotation works with similar setup

[Dias]

so I thought the problem was about custom annotation

[Dias]

so you think Guice should work fine with Kotlin annotations?

[Casey Brooks]

Yeah, there should be no difference between Java and Kotlin annotations, Guice doesn’t know the difference between the two.