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KotlinSerializableFilter should filter more methods#1971

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Godin merged 4 commits intojacoco:masterfrom
Godin:KotlinSerializableFilter
Oct 10, 2025
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KotlinSerializableFilter should filter more methods#1971
Godin merged 4 commits intojacoco:masterfrom
Godin:KotlinSerializableFilter

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@Godin Godin commented Oct 10, 2025 •
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This was overlooked in #1885

See #1969 (comment)

For example in case of

@kotlinx.serialization.Serializable
enum class Example {
    V
}

or

@kotlinx.serialization.Serializable
sealed class Example {
        @kotlinx.serialization.Serializable
        data class A(val data: String): Example()
}
  • Example$Companion.get$cachedSerializer()
  • Example$Companion.serializer()
  • Example._init_$_anonymous_() - see JetBrains/kotlin@3f034e8

In case of

@kotlinx.serialization.Serializable
object Example
  • Example.get$cachedSerializer()
  • Example.serializer()

And in case of

@kotlinx.serialization.Serializable
data class Example(
    val data1: List<String>,
    val data2: List<String>,
)

@Godin Godin added this to the 0.8.14 milestone Oct 9, 2025
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@Godin Godin requested a review from leveretka October 10, 2025 23:00
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leveretka approved these changes Oct 10, 2025
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Discussed this change offline.

The case with generic types can be handled later - #1972, other 3 cases needs to be covered to improve the behavior in case of serialization plugin.

@Godin Godin merged commit de76181 into jacoco:master Oct 10, 2025
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@Godin Godin deleted the KotlinSerializableFilter branch October 10, 2025 23:32
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Godin commented Oct 11, 2025 •
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Since there are many other projects waiting JaCoCo release with upgraded ASM (#1965), we are postponing the only so far found unhandled remaining and not so easy to handle case of @kotlinx.serialization.Serializable #1971, and staged 0.8.14 to be released with this change as latest. CC @merks @iloveeclipse

@Dukoff92 @ajeihala Even if we are very confident in absence of NPEs and in this change in general, would it be possible to test latest snapshot to check our theory that with this change even without #1971 situation is already much better than before, and there are no other remaining cases than #1971 ?

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Dukoff92 commented Oct 11, 2025

@Godin

Thanks again for looking into the issue and providing a fix. I can confirm that everything looks good with the latest snapshot version. I’ve checked all sealed classes with the @Serializable annotation in our codebase, and I don’t see any generated methods in the report.

I also looked at the generated methods when data class parameters are of type List, and didn’t find any generated ones for those either.

We don’t have any enum classes using serialization, so I can’t speak to that, but I see that it’s been addressed in the PR above. Maybe @ajeihala can test it out and provide more clarity.

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Godin commented Oct 11, 2025

@Dukoff92 Thank you very much for your fast tests! ❤️

@marcin-arciszewski-gds marcin-arciszewski-gds mentioned this pull request Oct 17, 2025
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@leveretka leveretka leveretka approved these changes

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component: core.filters language: Kotlin

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