Can I compose annotations somehow? I have these t...

# announcements

[ursus]

Can I compose annotations somehow?

I have these two anntations everywhere

@Provides
@JvmStatic
fun widgetUpdater() ..

Can I turn it somehow to this? where @ProvidesAndJvmStatic would reference then the daggers @Provide and kotlins @JvmStatic inside?

@ProvidesAndJvmStatic
fun widgetUpdater() ..

[CLOVIS]

Many people have asked for this, as far as I know it's not possible yet

[ursus]

Shame

[Big Chungus]

Spring allows this via advanced annotation scanning implementation. You could just as easily do the same and just "flatten" composite annotations via a compiler plugin or annotation processor (kapt)

[ursus]

you mean as a dagger feature? or my little processor which is then fed to dagger?

[Big Chungus]

Second option. Basically annotation processor that detects all annotations marked with @CompositeMarker and then all objects marked with those. e.g:

@CompositeMarker
@AnnotationA
@AnnotationB
annotation class CompositeAB

Then just flattens all those annotations on top of the object

[Big Chungus]

The output is then passed in to the rest of the compiler chain

[ursus]

Hm, annot processor can change sources? I thought only compiler plugin could do that; and annotation processor only generates new ones

[Big Chungus]

Yeah, you need compiler plugin. My bad.