Prior to this change, AABPP#determineRequiredStatus never checked the
return value of ReflectionUtils#findMethod when searching for a
'#required' attribute. This call returns null for annotations such as
@Inject, @Value and @Resource, and subsequently causes a
NullPointerException to be thrown when ReflectionUtils#invokeMethod is
called. The NPE is caught immediately and #determineRequiredStatus
returns defaulting to true, but this this approach is inefficient. It
is also problematic for users who have set breakpoints on NPE -- they
end up debugging into Spring internals, which is a false positive.
This commit checks the return value of of ReflectionUtils#findMethod,
and in the case of null, eagerly returns true. There is no change to
external behavior, simply a more efficient and debugging-friendly
implementation.
Existing test cases already cover this change, given that it is purely
a refactoring.
Issue: SPR-9316
2624b90906