Inspectopedia
 
2024.3

Redundant step in 'Stream' or 'Optional' call chain

Warning
New
Last modified: 03 December 2024

Reports redundant Stream or Optional calls like map(x -> x), filter(x -> true) or redundant sorted() or distinct() calls.

Note that a mapping operation in code like streamOfIntegers.map(Integer::valueOf) works as requireNonNull() check: if the stream contains null, it throws a NullPointerException, thus it's not absolutely redundant. Disable the Report redundant boxing in Stream.map() option if you do not want such cases to be reported.

This inspection depends on the Java feature 'Stream and Optional API', which is available since Java 8.