[Java] [Spring] Use deduction configOptions for oneOfInterfaces

[jpfinne]

Fix #20891

Add a new configOption to the spring generator: useOneOfInterfacesDeduction

When useOneOfInterfaces=true it allows the generation of an additional annotation on the generated inferface @JsonTypeInfo(use = JsonTypeInfo.Id.DEDUCTION) and the necessary @JsonSubTypes

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[jpfinne]

Hi @jpfinne, thanks for the PR! Please merge the 2 fixes I proposed via jpfinne#2. If you want me to explain more in detail which problems are fixed there, let me know. And please solve the merge conflict with master. Then this PR is good to go I think.

@martin-mfg thanks for the PR.

I've merged your changes and master

When this PR is merged by @wing328 I will implement the samedi Deduction mechanism for java client using Jackson

[rqton]

Hey there, i was looking for an usage of JsonTypeInfo.Id.DEDUCTION instead of using a discriminator and i landed right here 🚀 Is this feature dead or not ? Thanks 🙏

[jpfinne]

Hi @rqton Unfortunately this PR is not merged. Not sure why because it works. It's discouraging. Maybe you can convince @wing328

In the meantime I use templateDir to override the spring oneof_interface.mustache. It use the deduction if there is no discriminator.

{{>additionalOneOfTypeAnnotations}}
{{#withXml}}
{{>xmlAnnotation}}
{{/withXml}}
{{#discriminator}}
{{>typeInfoAnnotation}}
{{/discriminator}}{{^discriminator}}
@JsonTypeInfo(use = JsonTypeInfo.Id.DEDUCTION)
@JsonSubTypes({
    {{#interfaceModels}}
    @JsonSubTypes.Type(value = {{classname}}.class){{^-last}}, {{/-last}}
    {{/interfaceModels}}
})
{{/discriminator}}
{{>generatedAnnotation}}
public {{>sealed}}interface {{classname}}{{#vendorExtensions.x-implements}}{{#-first}} extends {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{/vendorExtensions.x-implements}} {{>permits}}{
    {{#discriminator}}
    public {{propertyType}} {{propertyGetter}}();
    {{/discriminator}}
}

[wing328]

@jpfinne sorry for late review as there are too many PRs

can you resolve the merge conflicts when you've time?

I'll try to get it merged and included in the upcoming release.

[jpfinne]

@jpfinne sorry for late review as there are too many PRs

can you resolve the merge conflicts when you've time?

@wing328 merged

[jpfinne]

@wing328 is there something missing in this PR? What can I do to help?

[wing328]

Just merged. Sorry for the delay

Thanks for the PR as always