finally kill of Lifecycle after all these years

hibernate-core/src/main/java/org/hibernate/CallbackException.java

@@ -5,8 +5,7 @@
 package org.hibernate;
 
 /**
- * Intended to be thrown from {@link org.hibernate.classic.Lifecycle}
- * and {@link Interceptor} callbacks.
+ * Intended to be thrown from {@link Interceptor} callbacks.
  *
  * @implNote This is a legacy exception type from back in the day before
  * Hibernate moved to an unchecked exception strategy.

hibernate-core/src/main/java/org/hibernate/Interceptor.java

@@ -54,7 +54,6 @@
  *
  * @author Gavin King
  */
-@SuppressWarnings("unused")
 public interface Interceptor {
 	/**
 	 * Called just before an object is initialized. The interceptor may change the {@code state}, which will

hibernate-core/src/main/java/org/hibernate/event/internal/AbstractSaveEventListener.java

@@ -11,7 +11,6 @@
 import org.hibernate.action.internal.AbstractEntityInsertAction;
 import org.hibernate.action.internal.EntityIdentityInsertAction;
 import org.hibernate.action.internal.EntityInsertAction;
-import org.hibernate.classic.Lifecycle;
 import org.hibernate.engine.internal.Cascade;
 import org.hibernate.engine.internal.CascadePoint;
 import org.hibernate.engine.spi.CascadingAction;
@@ -215,12 +214,7 @@ protected Object performSave(
 		}
 
 		final EntityKey key = useIdentityColumn ? null : entityKey( id, persister, source );
-		if ( invokeSaveLifecycle( entity, persister, source ) ) {
-			return id;
-		}
-		else {
-			return performSaveOrReplicate( entity, key, persister, useIdentityColumn, context, source, delayIdentityInserts );
-		}
+		return performSaveOrReplicate( entity, key, persister, useIdentityColumn, context, source, delayIdentityInserts );
 	}
 
 	private static EntityKey entityKey(Object id, EntityPersister persister, EventSource source) {
@@ -241,19 +235,6 @@ else if ( persistenceContext.containsDeletedUnloadedEntityKey( key ) ) {
 		return key;
 	}
 
-	protected boolean invokeSaveLifecycle(Object entity, EntityPersister persister, EventSource source) {
-		// Sub-insertions should occur before containing insertion so
-		// Try to do the callback now
-		if ( persister.implementsLifecycle() ) {
-			LOG.debug( "Calling onSave()" );
-			if ( ((Lifecycle) entity).onSave( source ) ) {
-				LOG.debug( "Insertion vetoed by onSave()" );
-				return true;
-			}
-		}
-		return false;
-	}
-
 	/**
 	 * Performs all the actual work needed to save an entity (well to get the save moved to
 	 * the execution queue).

hibernate-core/src/main/java/org/hibernate/event/internal/DefaultDeleteEventListener.java

@@ -14,7 +14,6 @@
 import org.hibernate.action.internal.OrphanRemovalAction;
 import org.hibernate.bytecode.enhance.spi.LazyPropertyInitializer;
 import org.hibernate.bytecode.spi.BytecodeEnhancementMetadata;
-import org.hibernate.classic.Lifecycle;
 import org.hibernate.engine.internal.Cascade;
 import org.hibernate.engine.internal.CascadePoint;
 import org.hibernate.engine.internal.ForeignKeys;
@@ -271,20 +270,18 @@ private void delete(
 			Object id,
 			Object version,
 			EntityEntry entityEntry) {
-		callbackRegistry.preRemove(entity);
-		if ( !invokeDeleteLifecycle( source, entity, persister ) ) {
-			deleteEntity(
-					source,
-					entity,
-					entityEntry,
-					event.isCascadeDeleteEnabled(),
-					event.isOrphanRemovalBeforeUpdates(),
-					persister,
-					transientEntities
-			);
-			if ( source.getFactory().getSessionFactoryOptions().isIdentifierRollbackEnabled() ) {
-				persister.resetIdentifier( entity, id, version, source );
-			}
+		callbackRegistry.preRemove( entity );
+		deleteEntity(
+				source,
+				entity,
+				entityEntry,
+				event.isCascadeDeleteEnabled(),
+				event.isOrphanRemovalBeforeUpdates(),
+				persister,
+				transientEntities
+		);
+		if ( source.getFactory().getSessionFactoryOptions().isIdentifierRollbackEnabled() ) {
+			persister.resetIdentifier( entity, id, version, source );
 		}
 	}
 
@@ -293,7 +290,6 @@ private void delete(
 	 */
 	private boolean canBeDeletedWithoutLoading(EventSource source, EntityPersister persister) {
 		return source.getInterceptor() == EmptyInterceptor.INSTANCE
-			&& !persister.implementsLifecycle()
 			&& !persister.hasSubclasses() //TODO: should be unnecessary, using EntityPersister.getSubclassPropertyTypeClosure(), etc
 			&& !persister.hasCascadeDelete()
 			&& !persister.hasNaturalIdentifier()
@@ -488,17 +484,6 @@ else if ( currentState[i] == LazyPropertyInitializer.UNFETCHED_PROPERTY
 		return deletedState;
 	}
 
-	protected boolean invokeDeleteLifecycle(EventSource session, Object entity, EntityPersister persister) {
-		if ( persister.implementsLifecycle() ) {
-			LOG.debug( "Calling onDelete()" );
-			if ( ( (Lifecycle) entity ).onDelete( session ) ) {
-				LOG.debug( "Deletion vetoed by onDelete()" );
-				return true;
-			}
-		}
-		return false;
-	}
-
 	protected void cascadeBeforeDelete(
 			EventSource session,
 			EntityPersister persister,

hibernate-core/src/main/java/org/hibernate/event/internal/DefaultPostLoadEventListener.java

@@ -10,7 +10,6 @@
 import org.hibernate.LockMode;
 import org.hibernate.action.internal.EntityIncrementVersionProcess;
 import org.hibernate.action.internal.EntityVerifyVersionProcess;
-import org.hibernate.classic.Lifecycle;
 import org.hibernate.engine.spi.EntityEntry;
 import org.hibernate.event.spi.EventSource;
 import org.hibernate.event.spi.PostLoadEvent;
@@ -20,11 +19,7 @@
 import org.hibernate.persister.entity.EntityPersister;
 
 /**
- * We do two things here:
- * <ul>
- * <li>Call {@link Lifecycle} interface if necessary</li>
- * <li>Perform needed {@link EntityEntry#getLockMode()} related processing</li>
- * </ul>
+ * Performs needed {@link EntityEntry#getLockMode()}-related processing.
  *
  * @author Gavin King
  * @author Steve Ebersole
@@ -72,13 +67,5 @@ public void onPostLoad(PostLoadEvent event) {
 						+ "] not supported for non-versioned entities [" + persister.getEntityName() + "]");
 			}
 		}
-
-		invokeLoadLifecycle( event, session );
-	}
-
-	protected void invokeLoadLifecycle(PostLoadEvent event, EventSource session) {
-		if ( event.getPersister().implementsLifecycle() ) {
-			( (Lifecycle) event.getEntity() ).onLoad( session, event.getId() );
-		}
 	}
 }

hibernate-core/src/main/java/org/hibernate/metamodel/internal/EntityRepresentationStrategyPojoStandard.java

@@ -16,7 +16,6 @@
 import org.hibernate.bytecode.spi.BytecodeProvider;
 import org.hibernate.bytecode.spi.ReflectionOptimizer;
 import org.hibernate.bytecode.spi.ReflectionOptimizer.InstantiationOptimizer;
-import org.hibernate.classic.Lifecycle;
 import org.hibernate.internal.CoreLogging;
 import org.hibernate.internal.CoreMessageLogger;
 import org.hibernate.internal.util.ReflectHelper;
@@ -59,7 +58,6 @@ public class EntityRepresentationStrategyPojoStandard implements EntityRepresent
 	private final JavaType<?> proxyJtd;
 
 	private final boolean isBytecodeEnhanced;
-	private final boolean lifecycleImplementor;
 
 	private final ReflectionOptimizer reflectionOptimizer;
 	private final ProxyFactory proxyFactory;
@@ -89,7 +87,6 @@ public EntityRepresentationStrategyPojoStandard(
 			this.proxyJtd = null;
 		}
 
-		this.lifecycleImplementor = Lifecycle.class.isAssignableFrom( mappedJavaType );
 		this.isBytecodeEnhanced = isPersistentAttributeInterceptableType( mappedJavaType );
 
 		final Property identifierProperty = bootDescriptor.getIdentifierProperty();
@@ -389,11 +386,6 @@ public ProxyFactory getProxyFactory() {
 		return proxyFactory;
 	}
 
-	@Override
-	public boolean isLifecycleImplementor() {
-		return lifecycleImplementor;
-	}
-
 	@Override
 	public boolean isBytecodeEnhanced() {
 		return isBytecodeEnhanced;

hibernate-core/src/main/java/org/hibernate/metamodel/spi/EntityRepresentationStrategy.java

@@ -27,10 +27,6 @@ public interface EntityRepresentationStrategy extends ManagedTypeRepresentationS
 	 */
 	ProxyFactory getProxyFactory();
 
-	default boolean isLifecycleImplementor() {
-		return false;
-	}
-
 	default boolean isBytecodeEnhanced() {
 		return false;
 	}

hibernate-core/src/main/java/org/hibernate/persister/entity/AbstractEntityPersister.java

@@ -40,7 +40,6 @@
 import org.hibernate.cache.spi.entry.StandardCacheEntryImpl;
 import org.hibernate.cache.spi.entry.StructuredCacheEntry;
 import org.hibernate.cache.spi.entry.UnstructuredCacheEntry;
-import org.hibernate.classic.Lifecycle;
 import org.hibernate.collection.spi.PersistentCollection;
 import org.hibernate.dialect.Dialect;
 import org.hibernate.dialect.lock.LockingStrategy;
@@ -464,8 +463,6 @@ public abstract class AbstractEntityPersister
 	 */
 	private final EntityPropertyMapping propertyMapping;
 
-	private final boolean implementsLifecycle;
-
 	private List<UniqueKeyEntry> uniqueKeyEntries = null; //lazily initialized
 	private ConcurrentHashMap<String,SingleIdArrayLoadPlan> nonLazyPropertyLoadPlansByName;
 
@@ -523,7 +520,6 @@ public AbstractEntityPersister(
 
 		javaType = representationStrategy.getLoadJavaType();
 		assert javaType != null;
-		this.implementsLifecycle = Lifecycle.class.isAssignableFrom( javaType.getJavaTypeClass() );
 
 		concreteProxy = entityMetamodel.isPolymorphic()
 				&& ( getBytecodeEnhancementMetadata().isEnhancedForLazyLoading() || hasProxy() )
@@ -4181,11 +4177,6 @@ public final Class<?> getMappedClass() {
 		return this.getMappedJavaType().getJavaTypeClass();
 	}
 
-	@Override
-	public boolean implementsLifecycle() {
-		return this.implementsLifecycle;
-	}
-
 	@Override
 	public Class<?> getConcreteProxyClass() {
 		final JavaType<?> proxyJavaType = getRepresentationStrategy().getProxyJavaType();