Return null or something nullable from a lambda in transformation method
Reports transform operations that may return null
inside a Reactive Stream chain.
Reactive Streams don't support nullable values, which causes such code to fail. The quick-fix suggests replacing map()
with mapNotNull
, which omits exceptions.
Example:
repository.findWithTailableCursorBy()
.map(e -> (Person)null)
.doOnNext(System.out::println)
After the quick-fix is applied:
repository.findWithTailableCursorBy()
.mapNotNull(e -> (Person)null)
.doOnNext(System.out::println)
Locating this inspection
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
ReactiveStreamsNullableInLambdaInTransform- Via Settings dialog
Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.
New in 2019.3
Availability
- By default bundled with
- Can be installed with plugin
Reactive Streams, 241.18072
Last modified: 18 June 2024