Kotlinx Parcelize class extend

Question

I have two open classes BaseNfcCard and SomeObjectNfcCard. Here SomeObjectNfcCard extends BaseNfcCard and Parcelable, also BaseNfcCard extends Parcelable.

When I pass SomeObjectNfcCard to another activity, I have data only from it and not from BaseNfcCard. Is this my code issue or lib?

@Parcelize
open class BaseCard(
        var cardId: String = "",
        var id: String = "",
        var type: Int = NfcFieldsHelper.UNDEFINED
) : Parcelable

@Parcelize
open class ObjectCard(
        var date: String = "",
        var objectState: Int = STATE_UNDEFINED,
        var managerId: String = "",
        var lastUpdate: String = "",

        var plombs: ArrayList<String> = ArrayList()
) : BaseCard(), Parcelable

Pass data to intent

private fun onCardParsed(result: ObjectCard) = startActivity(Intent(this,
        CardReadyActivity::class.java)
        .putExtra(CardReadyActivity.CARD_DATA, result))

Take data from intent

private lateinit var card: ObjectCard
card = intent?.extras?.getParcelable(CardReadyActivity.CARD_DATA)!!

@TimCastelijns `result: ObjectCard` with populated fields – Anton A. Aug 17 '18 at 07:50 — Anton A., Aug 17 '18 at 07:50

Alexey Soshin · Answer 1 · 2018-08-17T09:08:29.200

1

This is actually documented in Parcelize:

Note that only the primary constructor properties will be serialized.

https://github.com/JetBrains/kotlin/blob/master/plugins/android-extensions/android-extensions-runtime/src/kotlinx/android/parcel/Parcelize.kt#L24

But judging by their test cases, composition should work:

@Parcelize
class ObjectCard(
        var baseCard: BaseCard,
        var date: String = "",
        var objectState: Int = 2,
        var managerId: String = "",
        var lastUpdate: String = "",
        var plombs: ArrayList<String> = ArrayList()
)

edited Aug 17 '18 at 09:08

answered Aug 17 '18 at 08:22

Alexey Soshin

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So only way it's to write parcable implementation code or do not use base class? – Anton A. Aug 17 '18 at 08:53
You should be also able to use composition. I updated by answer with an example. – Alexey Soshin Aug 17 '18 at 09:09
Oh, I did not think it is better solution than write some code instread of use annotation. – Anton A. Aug 17 '18 at 09:59
Using composition instead of inheritance is not much more code. Please check the example above. – Alexey Soshin Aug 17 '18 at 10:12
Yes, but with composition I can not use java princeples of OOP – Anton A. Aug 17 '18 at 11:22
Composition is an OOP principle :) – Alexey Soshin Aug 17 '18 at 11:32

Kotlinx Parcelize class extend

1 Answers1