Includes consistent bean class resolution in the enhancement step as well as general reflection optimizations for user-declared methods.
Closes gh-22420
The isCandidateClass mechanism is consistently used for a bypass check before method traversal attempts. While by default this is only bypassing standard java types, the same mechanism can be used with index metadata which indicates non-presence of certain annotations.
See gh-22420
Many Java 11 internal classes are located in the jdk package. ShadowingClassLoader should not load them, because it can cause errors, e.g. java.lang.IllegalAccessError: class jdk.internal.reflect.ConstructorAccessorImpl loaded by org.springframework.instrument.classloading.ShadowingClassLoader @2bea5ab4 cannot access jdk/internal/reflect superclass jdk.internal.reflect.MagicAccessorImpl
This allows for proper nested type conversion in @Value Optional fields analogous to method parameters, through a new TypeDescriptor-based method in the TypeConverter SPI. As an additional and less involved measure that is worth backporting, DefaultListableBeanFactory defensively checks for pre-converted Optional wrappers.
Issue: SPR-17607
Previously, if a DeferredImportSelector was identified at a later stage
as part of processing the collected set of deferred imports, such
selector was processed as a regular import selector.
Semantically, it makes sense as we already are in the deferred phase at
this point and it doesn't make much sense to bother about the extra
contract.
However, Spring Framework 5 introduced the notion of Group that a
deferred import selector can define. When it does, the container has to
honour the contract of the Group rather than calling the simpler
ImportSelector parent contract.
This commit restructures the processing of such case. When a deferred
import selector is detected while processing deferred import selectors,
a group is created with only that selector and the group API is invoked.
Issue: SPR-17351
Juergen Hoeller