private static void makeVariableFinalIfNeeded(
InsertionContext context, @Nullable PsiReferenceExpression ref) {
if (!Registry.is("java.completion.make.outer.variables.final")
|| ref == null
|| PsiUtil.isLanguageLevel8OrHigher(ref)
|| JspPsiUtil.isInJspFile(ref)) {
return;
}
PsiElement target = ref.resolve();
if (target instanceof PsiLocalVariable || target instanceof PsiParameter) {
PsiClass placeClass =
PsiTreeUtil.findElementOfClassAtOffset(
context.getFile(), context.getTailOffset() - 1, PsiClass.class, false);
if (placeClass != null
&& !PsiTreeUtil.isAncestor(placeClass, target, true)
&& !HighlightControlFlowUtil.isReassigned(
(PsiVariable) target,
new HashMap<PsiElement, Collection<ControlFlowUtil.VariableInfo>>())) {
PsiModifierList modifierList = ((PsiVariable) target).getModifierList();
if (modifierList != null) {
modifierList.setModifierProperty(PsiModifier.FINAL, true);
}
}
}
}
