promote getSession() up to PersistentCollection

for the benefit of Hibernate Reactive, which currently casts to AbstractPersistentCollection

Author: gavinking

hibernate-core/src/main/java/org/hibernate/collection/spi/AbstractPersistentCollection.java

@@ -897,11 +897,7 @@ public void afterRowInsert(CollectionPersister persister, Object entry, int i) t
 	@Override
 	public abstract Collection<E> getOrphans(Serializable snapshot, String entityName) throws HibernateException;
 
-	/**
-	 * Get the session currently associated with this collection.
-	 *
-	 * @return The session
-	 */
+	@Override
 	public final SharedSessionContractImplementor getSession() {
 		return session;
 	}

hibernate-core/src/main/java/org/hibernate/collection/spi/PersistentArrayHolder.java

@@ -252,9 +252,9 @@ public boolean needsInserting(Object entry, int i, Type elemType) throws Hiberna
 	public boolean needsUpdating(Object entry, int i, Type elemType) throws HibernateException {
 		final Serializable sn = getSnapshot();
 		return i < Array.getLength( sn )
-				&& Array.get( sn, i ) != null
-				&& Array.get( array, i ) != null
-				&& elemType.isDirty( Array.get( array, i ), Array.get( sn, i ), getSession() );
+			&& Array.get( sn, i ) != null
+			&& Array.get( array, i ) != null
+			&& elemType.isDirty( Array.get( array, i ), Array.get( sn, i ), getSession() );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/collection/spi/PersistentCollection.java

@@ -11,6 +11,7 @@
 
 import org.hibernate.HibernateException;
 import org.hibernate.Incubating;
+import org.hibernate.Internal;
 import org.hibernate.engine.spi.InstanceIdentity;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
 import org.hibernate.metamodel.mapping.PluralAttributeMapping;
@@ -359,7 +360,6 @@ default boolean needsUpdating(
 	 *
 	 * @see #injectLoadedState
 	 */
-	@SuppressWarnings("UnusedReturnValue")
 	boolean endRead();
 
 	/**
@@ -511,6 +511,13 @@ default boolean isDirectlyProvidedCollection(Object collection) {
 
 	void initializeEmptyCollection(CollectionPersister persister);
 
+	/**
+	 * Get the session currently associated with this collection.
+	 * Declared here for use by Hibernate Reactive.
+	 */
+	@Internal
+	SharedSessionContractImplementor getSession();
+
 	/**
 	 * Is the collection newly instantiated?
 	 *