style: add final modifier where possible #629
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Signed-off-by: Niels Pardon <[email protected]>
nielspardon
requested review from
andrew-coleman,
benbellick,
bestbeforetoday and
vbarua
benbellick
requested changes
Dec 3, 2025
| <rule ref="category/java/codestyle.xml/FieldDeclarationsShouldBeAtStartOfClass" /> | ||
| <rule ref="category/java/codestyle.xml/FinalParameterInAbstractMethod" /> | ||
| <rule ref="category/java/codestyle.xml/LocalVariableCouldBeFinal" /> | ||
| <rule ref="category/java/codestyle.xml/MethodArgumentCouldBeFinal" /> |
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I am definitely in favor of the first two FinalParameterInAbstractMethod and LocalVariableCouldBeFinal, but I am less convinced about introducing MethodArgumentCouldBeFinal. It looks like a lot noise is introduced in this PR by bringing in that rule. Considering that usage of final doesn't actually prevent mutation of the object, just reassignment to a new object, it doesn't seem that useful.
We also already have the immutables library to protect against mutation for the classes for which that matters.
Happy to be convinced though if there is a compelling reason to switch to using final.
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This PR makes parameters and local variables final if possible and adds corresponding PMD checks so any new parameters or local variables will be declared final if they could be final.