kotlinlang #announcements

@dpk on the question when to use functional types versus callback interfaces. I would say, seperate interfaces only make sense when you really want to have a distinct name. if your interface would be called

Callback

, then just use the functional types with the added bonus of having the lambda notation available

dpk

10/31/2016, 1:25 PM

@kirillrakhman i’m currently typically injecting (dagger) callbacks into view objects. i could change that so i’m passing in callback lambdas along with the data to be displayed, though. something to think about anyway.

kirillrakhman

10/31/2016, 1:26 PM

I've never seen Dagger used for that. are the callbacks part of a shorter-lived scope?

dpk

10/31/2016, 1:30 PM

i’m using mortar+flow for my screens and the callbacks are scoped to a specific screen. i usually use it when i have buttons on an item view inside of a list view in a screen, where the alternative might be to pass a callback to the screen view, which then passes a callback to the list adapter, which then passes it to the item view. i’m not real happy with the pattern but i haven’t had much time to reevaluate it.

kirillrakhman

10/31/2016, 1:33 PM

interesting use case. I can't offer any perspective on that

thomasnield

10/31/2016, 1:38 PM

@Paul Woitaschek sorry I misunderstood the nature of your question.

thomasnield

10/31/2016, 1:39 PM

You still might be able to get help there though

dhkim

11/01/2016, 4:32 AM

Is there anything special about Kotlin plugin's ability to recognize kapt2 generated codes? I set a project with two subprojects one of which has an annotation processor run on the contained source codes. And with the following gradle script, I configured IDEA to recognize the kapt2 generated codes. But in the other project referencing the mentioned project, it frequently fails to resolve any references to the generated codes if I type in some codes. I mean I start with ok from the IDE and typing in some sentences turns the source code suddenly flagged with various errors raised by not recognizing the generated codes.

dhkim

11/01/2016, 4:33 AM

Copy code

apply plugin: 'idea'

sourceSets.main.java.srcDir file("$buildDir/generated/source/kapt2/main")

idea {
    module {
        // Tell idea to mark the folder as generated sources
        generatedSourceDirs += file("$buildDir/generated/source/kapt2/main")
    }
}

apply plugin: 'kotlin-kapt'

dependencies {
    compile project(":query")
    compile project(":commons")
    kapt project(":processor")
}

dhkim

11/01/2016, 4:35 AM

If I refresh gradle projects or run a build on the project with annotation processor run, then IDEA refreshes the editor and got all the references right.

dhkim

11/01/2016, 4:36 AM

If anyone has successfully configured IDEA for use with kapt2, then please let me know.

dhkim

11/01/2016, 4:37 AM

I can manage to do development in the current settings, but it's quite annoying. FYI, my codes are relatively type inference heavy.