FindBugs and CheckForNull on classes vs. interfaces
- by ndn
Is there any way to let FindBugs check and warn me if a CheckForNull annotation is present on the implementation of a method in a class, but not on the declaration of the method in the interface?
import javax.annotation.CheckForNull;
interface Foo {
public String getBar();
}
class FooImpl implements Foo {
@CheckForNull
@Override
public String getBar() {
return null;
}
}
public class FindBugsDemo {
public static void main(String[] args) {
Foo foo = new FooImpl();
System.out.println(foo.getBar().length());
}
}
I just discovered a bug in my application due to a missing null check that was not spotted by FindBugs because CheckForNull was only present on FooImpl, but not on Foo, and I don't want to spot all other locations of this problem manually.
