[Java] potential NullPointerException not detected

[michalliu (LYF)]

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• SonarQube Version used: 8.9 LTS Community Edition. Scanner Version used: 4.6.2.2472

I have an example where I observe a strange behaviour on code duplications:
Assume, this is the content of a Java file:
File A has a method:
public Object someMethodMayReturnNull() {
return something != null ? something.getSomething() : null;
}
File B called this method
Object obj = FileA.getInstance().someMethodMayReturnNull();
String result = obj.getXXX();

obj could be null, but sonarqube fails to detect in this scenrio

[SebastianHungerecker]

Hi @michalliu,

We currently don’t detect null pointer issues across files unless the called method is annotated with a @CheckForNull annotation.

Cheers,
Sebastian

[michalliu (LYF)]

I see, thanks for the answer.