defining different JsonTypeInfo annotations in both the superclass and the subtype results in ambiguity

[wesleyking0]

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Describe the bug

There is my case:

@JsonTypeInfo(use = Id.NAME, property = "animalType")
@JsonSubTypes({
    @Type(value = Humanity.class, name = "mammal")
})
class Animal {
    String animalType;
}

@JsonTypeInfo(use = Id.NAME, property = "mammalType")
@JsonSubTypes({
    @Type(value = Humanity.class, name = "humanity")
})
class Mammal extends Animal {
    String mammalType;
}

class Humanity extends Mammal {
}

I have a JSON string:

{
    "animalType": "mammal",
    "mammalType": "humanity"
}

I wish to return an instance of the Humanity when I parse the JSON string, but with the version 2.17.1 i am using, I am getting an instance of Mammal returned instead.

Version Information

2.17.1

Reproduction

Expected behavior

No response

Additional context

No response

[cowtowncoder]

Subtypes should not try to override @JsonTypeInfo: this is not supported functionality. And as such, results of trying to do that are undefined.

So... I don't think there's necessarily bug to fix. Although example is missing piece of code used for writing/reading json.

[wesleyking0]

Unn... I think it is a new feature. I don't known how much requirement the feature will have, but it is a good enhance to the Jackson.

[cowtowncoder]

@wesleyking0 I do not think this is something that should be done, ever. I am ok leaving this open, but currently disagree with the idea fundamentally.