rspec/rules/S4029/java/rule.adoc
Fred Tingaud 16f6c0aecf
Inline adoc when include has no additional value (#1940)
Inline adoc files when they are included exactly once.

Also fix language tags because this inlining gives us better information
on what language the code is written in.
2023-05-25 14:18:12 +02:00

45 lines
969 B
Plaintext

== Why is this an issue?
With Java 8, there's no need to write ``++Comparator++``s that compare primitive values or other ``++Comparable++``s; they can be generated for you using the ``++Comparator.comparing*++`` functions: ``++comparing++``, ``++comparingDouble++``, ``++comparingInt++``, ``++comparingLong++``.
*Note* that this rule is automatically disabled when the project's ``++sonar.java.source++`` is lower than ``++8++``.
=== Noncompliant code example
[source,java]
----
unparsedFiles.stream()
.sorted((f1, f2) -> f1.lines - f2.lines) // Noncompliant
.limit(30);
----
=== Compliant solution
[source,java]
----
unparsedFiles.stream()
.sorted(Comparator.comparingInt(UnparsedFile::getLines()))
.limit(30);
----
ifdef::env-github,rspecator-view[]
'''
== Implementation Specification
(visible only on this page)
=== Message
Use "Comparator.comparingXXX" instead.
=== Highlighting
Custom comparator
endif::env-github,rspecator-view[]