View inclusion on private fields is not used for inherited fields

[frederic-kneier]

Describe the bug Given a class Awith a private field a that extends a class B with a private field b and both fields having the @JsonView annotation the annotation of field b is not processed when serializing with a given view.

Version information 2.13.3

To Reproduce

interface View

open class B(
    @JsonView(View::class)
    val b: String = "b",
)

open class A(
    @JsonView(View::class)
    val a: String = "a",
) : B()

@Test
fun serialize() {
    val mapper = jacksonObjectMapper().apply {
        disable(MapperFeature.DEFAULT_VIEW_INCLUSION)
    }

    println(mapper.writerWithView(View::class.java).writeValueAsString(A()))
}

Expected behavior Serialized output is {"a": "a", "b": "b"} but is {"a": "a"}

Additional context

[cowtowncoder]

Is this Kotlin? If so, I'll need to transfer this to Kotlin module, or, alternatively, if it can be reproduced with plain Java it may remain here.

[frederic-kneier]

This problem is not Kotlin specific. Properties are just a combination of private field and a getter for val and getter+setter for var. In this case the annotation will be added to the private field.

I could transfer the code to Java but the general gist is the same.

[cowtowncoder]

Just because the general idea is the same does not necessarily mean this would not be Kotlin-specific (in the sense I meant it), mostly because Kotlin module's handling of (Kotlin) classes differs in some ways from general databind handling of POJOs.

So: I can move this to Kotlin module for checking there (which is fine), or, if there is Java-only version that shows the issue without Kotlin module, it can be worked on here. The practical difference is that I am not fluent enough with Kotlin to work on Kotlin module (beyond trivial changes) so I can only help with pure Java reproduction. But the Kotlin module maintainers and contributors can help there as necessary.