Hi, I am writing custom DokkaPlugin. And was wondering, is there way to get default value of field f...

# dokka

[Julia Solonar]

Hi, I am writing custom DokkaPlugin. And was wondering, is there way to get default value of field from DProperty ?
For example:

class Color{
 var r:Int = 250
}

How to get that 250 value?

[Marcin Aman]

AFAIK this should be a `org.jetbrains.dokka.model.DefaultValue`in extra properties
Consider following tests: https://github.com/Kotlin/dokka/blob/d6c798e44381fd436a264229f94f19528382c136/plugins/base/src/test/kotlin/model/FunctionsTest.kt#L335

[Marcin Aman]

Also: if you would like to share your plugin with the community consider adding it here: https://kotlin.github.io/dokka/1.4.10.2/community/plugins-list/

[Julia Solonar]

@Marcin Aman Thanks so much

[Julia Solonar]

@Marcin Aman Looks like DefaultValue is using just as extra for DParameter . And for DProperty it's not used.

[Marcin Aman]

Hmm they should be gathered also for DProperty, i can do val sample = 1 and in DProperty i get "1" as default value.

Could you give me an example on which you are testing? Maybe something else is wrong

[Julia Solonar]

So there are two variants:
1)

class Color (var r:Int = 250)

In this case from constructor I can get DParameter with extra where defaultValue will be 250.

2)

class Color {var r:Int = 250}

In this case I have DProperty with extra but no DefaultValue there.

[Julia Solonar]

I also checked source code and found that DefaultValue instance is creating only for parameter:

[Julia Solonar]

Знімок екрана 2020-11-18 о 15.26.26.png

[Julia Solonar]

In the bottom you can see that there is no defaultValue in extra

[Julia Solonar]

for code:

class ColorTest {
    val r: Int = 1
}

[Julia Solonar]

Знімок екрана 2020-11-18 о 15.35.53.png

[Marcin Aman]

Not gonna lie i find it very strange that you don't have those values, which version of dokka are you using? Or maybe can you share your project so i'll try to help you on it?

Imho they are gathered also for the `DParameter`: https://github.com/Kotlin/dokka/blob/1959b914c0838be814d45f617517ac73fa33cd47/plugins/base/src/main/kotlin/translators/descriptors/DefaultDescriptorToDocumentableTranslator.kt#L442

[Julia Solonar]

Thank you so much for your reply. The problem is in version. I am using 1.4.0 😅. And for DProperty DefaultValue was added in 1.4.10.2 .

Thanks so much😊