We now support reactive EvaluationContext retrieval in conjunction with ReactiveEvaluationContextExtensions. Reactive SpEL Context extensions may access Reactor's Context and provide contextual details during SpEL evaluation.
Original Pull Request: #454
We now cache the BeanFactory lookup for EvaluationContextExtension within the ExtensionAwareEvalutationContextProvider to avoid (expensive) repeated context scans when creating the actual EvaluationContext.
Original pull request: #395.
Before this commit we haven't properly resolved methods on a root object provided by an EvaluationContextExtension that was using varargs. With a vararg method, the number of parameters handed into the method is not necessary equal to the number of parameters. We previously simply skipped methods with a different number of arguments. We now try direct matches first but calculate valid varargs alternatives in case that initial lookup fails and try to match those alternatives.
This lookup is implemented in ….util.ParameterTypes now and used by ….spel.spi.Function. The latter now also handles the actual invocation of those methods properly by collecting the trailing arguments into an array.
We now have a refined replica of the EvaluationContextProvider API and SPIs in the org.springframework.data.spel package. It has seen a bit of a Java 8 overhaul by removing the SPI support class in favor of turning most methods in EvaluationContextExtension into default ones.
The already existing API has been renamed to QueryMethodEvaluationContextProvider to indicate it's working with additional semantics specific to query methods (i.e. the Parameters metadata). The internals have been refactored to use the new API but still detect implementations of the old EvaluationContextExtension interface. The implementations get wrapped into an adapting proxy to satisfy the new API so that the actual inspection and usage of the extension is now already done using the new APIs.
The repository configuration has slightly change so that the creation of the EvaluationContextProvider is now taking place within RepositoryFactoryBeanSupport's implementation of BeanFactoryAware.
AbstractMappingContext is now ApplicationContextAware and holds an ExtensionAwareEvaluationContextProvider using the configured ApplicationContext. That EvaluationContextProvider is forwarded to all MutablePersistentEntity instances. BasicPersistentEntity now exposes getEvaluationContext(…) to subclasses to easily create an EvaluationContext using the extension aware infrastructure.
Removed DefaultEvaluationContextProvider in favor of a simple constant in QueryMethodEvaluationContextProvider.
Related tickets: DATACMNS-1258, DATACMNS-1108.
