Overridden nullable methods are not annotated as @Nullable JSR-305 [BATCH-2839]

[spring-projects-issues]

mikeldpl opened BATCH-2839 and commented

I have some problems to use Kotlin with spring batch. Kotlin has strict validation on nullable vs nonnullable methods/parameters. But in spring-batch we have a lot of mistakes in JSR-305 annotations usage.

e.g. org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader#read method does not have @Nullable annotation. But org.springframework.batch.item.support package annotated as @NonNullApi. So "read" method is not nullable (but returns null).

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Affects: 4.1.2

Referenced from: pull request #726, and commits a7092a2

[spring-projects-issues]

Mahmoud Ben Hassine commented

According to SPR-15896, this is a valid point. Let's plan this to 4.2 GA.