KClass for Objective-C classes is not supported yet

[mustafaozhan]

Describe the bug
Creating this bug since this one is actually not resolved: #1016

So the issue is currently we are not able to inject Objective-C classes directly that's why I use a wrapper class to hold Objective-C class inside. (In the example it is UserDefaults)

If I try below app runs with no problem

data class NativeDependencyWrapper(val userDefaults: NSUserDefaults)

internal actual val settingsModule = module {
    single<Settings> {
        AppleSettings(get<NativeDependencyWrapper>().userDefaults)
    }
}

internal fun getIOSModule(userDefaults: NSUserDefaults) = module {
    single { NativeDependencyWrapper(userDefaults) }
}

But expected behaviour should be like below, we shouldn't need this extra wrapper:

internal actual val settingsModule = module {
    single<Settings> { AppleSettings(get()) }
}

internal fun getIOSModule(userDefaults: NSUserDefaults) = module {
    single { userDefaults }
}

Here is a PR that I remove this wrapper class: https://github.com/Oztechan/CCC/pull/1525/files so it can be used as reproducer

To Reproduce
Steps to reproduce the behavior:
Run the ios app in mentioned PR branch, after the app starts running it will crash with this log

Function doesn't have or inherit @Throws annotation and thus exception isn't propagated from Kotlin to Objective-C/Swift as NSError.
It is considered unexpected and unhandled instead. Program will be terminated.
Uncaught Kotlin exception: kotlin.IllegalStateException: KClass for Objective-C classes is not supported yet
    at 0   CCC                                 0x10ea5304b        kfun:kotlin.Throwable#<init>(kotlin.String?){} + 107 
    at 1   CCC                                 0x10ea4bf57        kfun:kotlin.Exception#<init>(kotlin.String?){} + 103 
    at 2   CCC                                 0x10ea4c197        kfun:kotlin.RuntimeException#<init>(kotlin.String?){} + 103 
    at 3   CCC                                 0x10ea4c857        kfun:kotlin.IllegalStateException#<init>(kotlin.String?){} + 103 
    at 4   CCC                                 0x10ea74a3c        kfun:kotlin.native.internal.KClassUnsupportedImpl#hashCode(){}kotlin.Int + 316 
    at 5   CCC                                 0x10eab57c9        kfun:kotlin.collections.HashMap.hash#internal + 217 
    at 6   CCC                                 0x10eab6445        kfun:kotlin.collections.HashMap.findKey#internal + 357 
    at 7   CCC                                 0x10eab35c9        kfun:kotlin.collections.HashMap#get(1:0){}1:1? + 217 
    at 8   CCC                                 0x10ef2686a        kfun:org.koin.ext#getFullName__at__kotlin.reflect.KClass<*>(){}kotlin.String + 314 
    at 9   CCC                                 0x10ef09548        kfun:org.koin.core.definition#indexKey(kotlin.reflect.KClass<*>;org.koin.core.qualifier.Qualifier?;org.koin.core.qualifier.Qualifier){}kotlin.String + 520 
    at 10  CCC                                 0x10ef11278        kfun:org.koin.core.module.Module#indexPrimaryType(org.koin.core.instance.InstanceFactory<*>){} + 488 
    at 11  CCC                                 0x10f119a01        kfun:com.oztechan.ccc.provider.di.module.getIOSModule$lambda$1#internal + 929 
    at 12  CCC                                 0x10f119b7b        kfun:com.oztechan.ccc.provider.di.module.$getIOSModule$lambda$1$FUNCTION_REFERENCE$2.invoke#internal + 107 
    at 13  CCC                                 0x10f119c7b        kfun:com.oztechan.ccc.provider.di.module.$getIOSModule$lambda$1$FUNCTION_REFERENCE$2.$<bridge-UNNN>invoke(-1:0){}#internal + 107 
    at 14  CCC                                 0x10ef2621d        kfun:org.koin.dsl#module(kotlin.Boolean;kotlin.Function1<org.koin.core.module.Module,kotlin.Unit>){}org.koin.core.module.Module + 365 
    at 15  CCC                                 0x10ef2635b        kfun:org.koin.dsl#module$default(kotlin.Boolean;kotlin.Function1<org.koin.core.module.Module,kotlin.Unit>;kotlin.Int){}org.koin.core.module.Module + 155 
    at 16  CCC                                 0x10f11959d        kfun:com.oztechan.ccc.provider.di.module#getIOSModule(platform.Foundation.NSUserDefaults){}org.koin.core.module.Module + 205 
    at 17  CCC                                 0x10f118c4b        kfun:com.oztechan.ccc.provider.di.initKoin$lambda$0#internal + 475 
    at 18  CCC                                 0x10f119282        kfun:com.oztechan.ccc.provider.di.$initKoin$lambda$0$FUNCTION_REFERENCE$0.invoke#internal + 114 
    at 19  CCC                                 0x10f11939b        kfun:com.oztechan.ccc.provider.di.$initKoin$lambda$0$FUNCTION_REFERENCE$0.$<bridge-UNNN>invoke(-1:0){}#internal + 107 
    at 20  CCC                                 0x10ef283a0        kfun:org.koin.core.context.MutableGlobalContext#startKoin(kotlin.Function1<org.koin.core.KoinApplication,kotlin.Unit>){}org.koin.core.KoinApplication + 688 
    at 21  CCC                                 0x10ef06ee8        kfun:org.koin.core.context#startKoin(kotlin.Function1<org.koin.core.KoinApplication,kotlin.Unit>){}org.koin.core.KoinApplication + 280 
    at 22  CCC                                 0x10f118375        kfun:com.oztechan.ccc.provider.di#initKoin(platform.Foundation.NSUserDefaults;com.oztechan.ccc.analytics.AnalyticsManager){}org.koin.core.KoinApplication + 437 
    at 23  CCC                                 0x10f1f32d0        objc2kotlin.3907 + 240 
    at 24  CCC                                 0x10e86294e        $s3CCC4koinSo017ProviderKoin_coreD0CvpfiADyXEfU_ + 254 
    at 25  CCC                                 0x10e862838        $s3CCC4koin_WZ + 8 
    at 26  libdispatch.dylib                   0x110d0a74d        _dispatch_client_callout + 7 
    at 27  libdispatch.dylib                   0x110d0bc9a        _dispatch_once_callout + 65 
    at 28  libswiftCore.dylib                  0x7fff2f3a0599     swift_once + 25 
    at 29  CCC                                 0x10e862a30        $s3CCC4koinSo017ProviderKoin_coreD0Cvau + 48 
    at 30  CCC                                 0x10e885ff3        $s3CCC11ApplicationVACycfC + 1203 
    at 31  CCC                                 0x10e8887c8        $s3CCC11ApplicationV7SwiftUI3AppAadEPxycfCTW + 8 
    at 32  SwiftUI                             0x7fff562e5375     $s7SwiftUI3AppPAAE4mainyyFZ + 46 
    at 33  CCC                                 0x10e888752        $s3CCC11ApplicationV5$mainyyFZ + 34 
    at 34  CCC                                 0x10e8887d8        main + 8 
    at 35  ???                                 0x11d90330f        0x0 + 4790956815 

Expected behavior
App should run

Koin project used and used version (please complete the following information):
koin-core version 3.3.0, 3.3.2

[arnaudgiuliani]

did you tried latest Koin in 3.3.2?

[mustafaozhan]

@arnaudgiuliani just tried and yes it still give the same error

[csanfilippo]

I confirm what @mustafaozhan is reporting.
My project is using Koin core 3.3.2

[arnaudgiuliani]

I need to continue investigating. The more I an gather sample, the more I can test this 🤔

Seems a limitation of Kotlin/native with reified type as I. can see.

[mustafaozhan]

@arnaudgiuliani Yeap sure take your time 🙂 as for the sample you can try running my app in this branch https://github.com/Oztechan/CCC/tree/1524-Remove_NativeDependencyWrapper

The app has submodules, so you need to clone them too and the crash is runtime, so you need to run the iOS app in order to get the crash. README.md has both How to clone and How to run > iOS sections, located here: https://github.com/Oztechan/CCC#readme

[arnaudgiuliani]

Great, thanks for your help.

[arnaudgiuliani]

Rescheduling it for new core release 👍

[arnaudgiuliani]

Still stuck due to Kotlin native limitations. Operations are not allowed on KClass/ObjC: "KClass for Objective-C classes is not supported yet"

I've tried to hack around definition ObjCObject type also, nothing great. Will ask Jetbrains about some clues on it.

[arnaudgiuliani]

Looking for a solution around. Let's keep an eye for Koin 3.5 on it

[arnaudgiuliani]

still waiting for some updates

[cmunaro]

I have the same problem with Koin 3.5.3, as a workaround for a singleton I used an object as dependency provider for my Objective-C wrapper