mapstruct / mapstruct/mapstruct-idea
MapStruct plugin does not support kotlin's data classes annotated with `@JvmRecord`
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kotlin
- Dominant language
- Java
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Description
If you have such data class:
@JvmRecord
data class Service(
val serviceId: Long,
}
and such java record:
record Service2(
long serviceId
) {}
and use them in mapping:
@Mapper
interface ServiceMapper {
Service2 fromService(Service service);
}
Then plugin will false warn about absent target mapping, but MapStruct itself works well.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the warning with the Kotlin @JvmRecord data class, Java record, and ServiceMapper examples from the issue, then compare the plugin's mapping analysis with MapStruct's result. Trace the inspection or mapping-resolution entry point that handles record properties. Done means the false absent-target-mapping warning no longer appears for this case while genuine warnings remain.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, kotlin
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100