HHH-18431 Allow Hibernate Reactive to skip lazy initialization

The fix for HHH-18147 add a lazy initialization that causes regressions in
Hibernate Reactive.

This change makes it possible to skip the lazy initialization (Hibernate
Reactive does not support it anyway) for the time being.

I might find a better solution when I have time.

Author: DavideD

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ToOneAttributeMapping.java

@@ -2367,10 +2367,7 @@ private Object extractValue(Object domainValue, SharedSessionContractImplementor
 		}
 
 		if ( referencedPropertyName != null ) {
-			final LazyInitializer lazyInitializer = HibernateProxy.extractLazyInitializer( domainValue );
-			if ( lazyInitializer != null ) {
-				domainValue = lazyInitializer.getImplementation();
-			}
+			domainValue = lazyInitialize( domainValue );
 			assert getAssociatedEntityMappingType()
 					.getRepresentationStrategy()
 					.getInstantiator()
@@ -2381,6 +2378,18 @@ assert getAssociatedEntityMappingType()
 		return foreignKeyDescriptor.getAssociationKeyFromSide( domainValue, sideNature.inverse(), session );
 	}
 
+	/**
+	 * For Hibernate Reactive, because it doesn't support lazy initialization, it will override this method and skip it
+	 * when possible.
+	 */
+	protected Object lazyInitialize(Object domainValue) {
+		final LazyInitializer lazyInitializer = HibernateProxy.extractLazyInitializer( domainValue );
+		if ( lazyInitializer != null ) {
+			return lazyInitializer.getImplementation();
+		}
+		return domainValue;
+	}
+
 	private static Object extractAttributePathValue(Object domainValue, EntityMappingType entityType, String attributePath) {
 		if ( ! attributePath.contains( "." ) ) {
 			return entityType.findAttributeMapping( attributePath ).getValue( domainValue );