constructor argument Polymorthism

[punksta]

sealed class Param : Parcelable
abstract class ParamA : Param()
abstract class ParamB : Param()

sealed class Holder<out T: Param>(val param: T): Parcelable

@PaperParcel
class HolderA(paramA: ParamA) : Holder<ParamA>(paramA), PaperParcelable {
    companion object {
        @JvmField val CREATOR = PaperParcelHolderA.CREATOR
    }
}

@PaperParcel
class HolderB(paramB: ParamB) : Holder<ParamB>(paramB), PaperParcelable {
    companion object {
        @JvmField val CREATOR = PaperParcelHolderB.CREATOR
    }
}

does not work:

error: No field match found for the constructor parameter "paramB" in solutions.coub.com.flowers.model.payments.HolderB. Constructor arguments are matched with fields via their name and type.

if rename paramB and paramA into param Creator of HolderA and B will use type Param for their's constructor argument.

Is it possible to check generic value of current class to find class of constructor argument?

[grandstaish]

Oops, yeah that should be possible to fix. I'll try have a fix and a new release in the weekend!

[grandstaish]

I just pushed a snapshot if you want to try it out straight away. Just add the snapshot repo and deps:

repositories {
    maven { url "https://oss.jfrog.org/artifactory/oss-snapshot-local/" }
}

dependencies {
    compile 'nz.bradcampbell:paperparcel:2.0.2-SNAPSHOT'
    compile 'nz.bradcampbell:paperparcel-kotlin:2.0.2-SNAPSHOT'
    kapt 'nz.bradcampbell:paperparcel-compiler:2.0.2-SNAPSHOT'
}

The working code:

sealed class Param : Parcelable
abstract class ParamA : Param()
abstract class ParamB : Param()

sealed class Holder<out T: Param>(val param: T): PaperParcelable

@PaperParcel
class HolderA(param: ParamA) : Holder<ParamA>(param) {
  companion object {
    @JvmField val CREATOR = PaperParcelHolderA.CREATOR
  }
}

@PaperParcel
class HolderB(param: ParamB) : Holder<ParamB>(param) {
  companion object {
    @JvmField val CREATOR = PaperParcelHolderB.CREATOR
  }
}

Note: I moved PaperParcelable to the Holder class. Not required, I just like this style more.

[punksta]

@grandstaish Cool, I will check it at the end of day. Thanks for fast reply.

[punksta]

snapshot works, thanks.

[grandstaish]

Fyi, 2.0.2 has just been released with this fix included. Sorry about taking so long!