@Override
public L getInstance() {
- final ListenerRegistration<L> d = delegate;
- return d == null ? null : (L)d.getInstance();
+ // ObjectRegistration annotates this method as @Nonnull but we could return null if the delegate is not set yet.
+ // In reality, we do not and should not ever call this method on DelayedListenerRegistration instances anyway
+ // but, since we have to provide an implementation to satisfy the interface, we throw
+ // UnsupportedOperationException to honor the API contract of not returning null and to avoid a FindBugs error
+ // for possibly returning null.
+ throw new UnsupportedOperationException(
+ "getInstance should not be called on this instance since it could be null");
}
@Override