org.hibernate.engine.spi.Status#DELETED源码实例Demo

private Object[] getValues(Object entity, EntityEntry entry, boolean mightBeDirty, SessionImplementor session) {
	final Object[] loadedState = entry.getLoadedState();
	final Status status = entry.getStatus();
	final EntityPersister persister = entry.getPersister();

	final Object[] values;
	if ( status == Status.DELETED ) {
		//grab its state saved at deletion
		values = entry.getDeletedState();
	}
	else if ( !mightBeDirty && loadedState != null ) {
		values = loadedState;
	}
	else {
		checkId( entity, persister, entry.getId(), session );

		// grab its current state
		values = persister.getPropertyValues( entity );

		checkNaturalId( persister, entry, values, loadedState, session );
	}
	return values;
}
 

private boolean isUpdateNecessary(final FlushEntityEvent event, final boolean mightBeDirty) {
	final Status status = event.getEntityEntry().getStatus();
	if ( mightBeDirty || status == Status.DELETED ) {
		// compare to cached state (ignoring collections unless versioned)
		dirtyCheck( event );
		if ( isUpdateNecessary( event ) ) {
			return true;
		}
		else {
			if ( SelfDirtinessTracker.class.isInstance( event.getEntity() ) ) {
				( (SelfDirtinessTracker) event.getEntity() ).$$_hibernate_clearDirtyAttributes();
			}
			event.getSession()
					.getFactory()
					.getCustomEntityDirtinessStrategy()
					.resetDirty( event.getEntity(), event.getEntityEntry().getPersister(), event.getSession() );
			return false;
		}
	}
	else {
		return hasDirtyCollections( event, event.getEntityEntry().getPersister(), status );
	}
}
 

protected boolean invokeInterceptor(
		SessionImplementor session,
		Object entity,
		EntityEntry entry,
		final Object[] values,
		EntityPersister persister) {
	boolean isDirty = false;
	if ( entry.getStatus() != Status.DELETED ) {
		if ( callbackRegistry.preUpdate( entity ) ) {
			isDirty = copyState( entity, persister.getPropertyTypes(), values, session.getFactory() );
		}
	}

	final boolean answerFromInterceptor =  session.getInterceptor().onFlushDirty(
			entity,
			entry.getId(),
			values,
			entry.getLoadedState(),
			persister.getPropertyNames(),
			persister.getPropertyTypes()
	);

	return answerFromInterceptor || isDirty;
}
 

/**
 * The given save-update event named a transient entity.
 * <p/>
 * Here, we will perform the save processing.
 *
 * @param event The save event to be handled.
 *
 * @return The entity's identifier after saving.
 */
protected Serializable entityIsTransient(SaveOrUpdateEvent event) {

	LOG.trace( "Saving transient instance" );

	final EventSource source = event.getSession();

	EntityEntry entityEntry = event.getEntry();
	if ( entityEntry != null ) {
		if ( entityEntry.getStatus() == Status.DELETED ) {
			source.forceFlush( entityEntry );
		}
		else {
			throw new AssertionFailure( "entity was persistent" );
		}
	}

	Serializable id = saveWithGeneratedOrRequestedId( event );

	source.getPersistenceContext().reassociateProxy( event.getObject(), id );

	return id;
}
 

/**
 * If there is already a corresponding proxy associated with the
 * persistence context, return it; otherwise create a proxy, associate it
 * with the persistence context, and return the just-created proxy.
 *
 * @param event The initiating load request event
 * @param persister The persister corresponding to the entity to be loaded
 * @param keyToLoad The key of the entity to be loaded
 * @param options The defined load options
 * @param persistenceContext The originating session
 *
 * @return The created/existing proxy
 */
private Object createProxyIfNecessary(
		final LoadEvent event,
		final EntityPersister persister,
		final EntityKey keyToLoad,
		final LoadEventListener.LoadType options,
		final PersistenceContext persistenceContext) {
	Object existing = persistenceContext.getEntity( keyToLoad );
	final boolean traceEnabled = LOG.isTraceEnabled();
	if ( existing != null ) {
		// return existing object or initialized proxy (unless deleted)
		if ( traceEnabled ) {
			LOG.trace( "Entity found in session cache" );
		}
		if ( options.isCheckDeleted() ) {
			EntityEntry entry = persistenceContext.getEntry( existing );
			Status status = entry.getStatus();
			if ( status == Status.DELETED || status == Status.GONE ) {
				return null;
			}
		}
		return existing;
	}
	if ( traceEnabled ) {
		LOG.trace( "Creating new proxy for entity" );
	}
	return createProxy( event, persister, keyToLoad, persistenceContext );
}
 

@Override
public boolean isModifiableEntity() {
	final Status status = getStatus();
	final Status previousStatus = getPreviousStatus();
	return getPersister().isMutable()
			&& status != Status.READ_ONLY
			&& ! ( status == Status.DELETED && previousStatus == Status.READ_ONLY );
}
 

protected Serializable performSaveOrUpdate(SaveOrUpdateEvent event) {
	// this implementation is supposed to tolerate incorrect unsaved-value
	// mappings, for the purpose of backward-compatibility
	EntityEntry entry = event.getSession().getPersistenceContext().getEntry( event.getEntity() );
	if ( entry!=null && entry.getStatus() != Status.DELETED ) {
		return entityIsPersistent(event);
	}
	else {
		return entityIsTransient(event);
	}
}
 

private void handlePostUpdate(Object entity, EventSource source) {
	EntityEntry entry = source.getPersistenceContext().getEntry( entity );
	// mimic the preUpdate filter
	if ( Status.DELETED != entry.getStatus()) {
		callbackRegistry.postUpdate(entity);
	}
}
 

/**
 * If there is already a corresponding proxy associated with the
 * persistence context, return it; otherwise create a proxy, associate it
 * with the persistence context, and return the just-created proxy.
 *
 * @param event The initiating load request event
 * @param persister The persister corresponding to the entity to be loaded
 * @param keyToLoad The key of the entity to be loaded
 * @param options The defined load options
 * @param persistenceContext The originating session
 *
 * @return The created/existing proxy
 */
private Object createProxyIfNecessary(
		final LoadEvent event,
		final EntityPersister persister,
		final EntityKey keyToLoad,
		final LoadEventListener.LoadType options,
		final PersistenceContext persistenceContext) {
	Object existing = persistenceContext.getEntity( keyToLoad );
	if ( existing != null ) {
		// return existing object or initialized proxy (unless deleted)
		if ( traceEnabled ) {
			LOG.trace( "Entity found in session cache" );
		}
		if ( options.isCheckDeleted() ) {
			EntityEntry entry = persistenceContext.getEntry( existing );
			Status status = entry.getStatus();
			if ( status == Status.DELETED || status == Status.GONE ) {
				return null;
			}
		}
		return existing;
	}
	if ( traceEnabled ) {
		LOG.trace( "Creating new proxy for entity" );
	}
	// return new uninitialized proxy
	Object proxy = persister.createProxy( event.getEntityId(), event.getSession() );
	persistenceContext.getBatchFetchQueue().addBatchLoadableEntityKey( keyToLoad );
	persistenceContext.addProxy( keyToLoad, proxy );
	return proxy;
}
 

/**
 * Attempts to locate the entity in the session-level cache.
 * <p/>
 * If allowed to return nulls, then if the entity happens to be found in
 * the session cache, we check the entity type for proper handling
 * of entity hierarchies.
 * <p/>
 * If checkDeleted was set to true, then if the entity is found in the
 * session-level cache, it's current status within the session cache
 * is checked to see if it has previously been scheduled for deletion.
 *
 * @param event The load event
 * @param keyToLoad The EntityKey representing the entity to be loaded.
 * @param options The load options.
 *
 * @return The entity from the session-level cache, or null.
 *
 * @throws HibernateException Generally indicates problems applying a lock-mode.
 */
protected Object loadFromSessionCache(
		final LoadEvent event,
		final EntityKey keyToLoad,
		final LoadEventListener.LoadType options) throws HibernateException {

	SessionImplementor session = event.getSession();
	Object old = session.getEntityUsingInterceptor( keyToLoad );

	if ( old != null ) {
		// this object was already loaded
		EntityEntry oldEntry = session.getPersistenceContext().getEntry( old );
		if ( options.isCheckDeleted() ) {
			Status status = oldEntry.getStatus();
			if ( status == Status.DELETED || status == Status.GONE ) {
				return REMOVED_ENTITY_MARKER;
			}
		}
		if ( options.isAllowNulls() ) {
			final EntityPersister persister = event.getSession()
					.getFactory()
					.getEntityPersister( keyToLoad.getEntityName() );
			if ( !persister.isInstance( old ) ) {
				return INCONSISTENT_RTN_CLASS_MARKER;
			}
		}
		upgradeLock( old, oldEntry, event.getLockOptions(), event.getSession() );
	}

	return old;
}
 

/**
 * Determine whether the entity is persistent, detached, or transient
 *
 * @param entity The entity to check
 * @param entityName The name of the entity
 * @param entry The entity's entry in the persistence context
 * @param source The originating session.
 *
 * @return The state.
 */
protected EntityState getEntityState(
		Object entity,
		String entityName,
		EntityEntry entry, //pass this as an argument only to avoid double looking
		SessionImplementor source) {

	final boolean traceEnabled = LOG.isTraceEnabled();
	if ( entry != null ) { // the object is persistent

		//the entity is associated with the session, so check its status
		if ( entry.getStatus() != Status.DELETED ) {
			// do nothing for persistent instances
			if ( traceEnabled ) {
				LOG.tracev( "Persistent instance of: {0}", getLoggableName( entityName, entity ) );
			}
			return EntityState.PERSISTENT;
		}
		// ie. e.status==DELETED
		if ( traceEnabled ) {
			LOG.tracev( "Deleted instance of: {0}", getLoggableName( entityName, entity ) );
		}
		return EntityState.DELETED;
	}
	// the object is transient or detached

	// the entity is not associated with the session, so
	// try interceptor and unsaved-value

	if ( ForeignKeys.isTransient( entityName, entity, getAssumedUnsaved(), source ) ) {
		if ( traceEnabled ) {
			LOG.tracev( "Transient instance of: {0}", getLoggableName( entityName, entity ) );
		}
		return EntityState.TRANSIENT;
	}
	if ( traceEnabled ) {
		LOG.tracev( "Detached instance of: {0}", getLoggableName( entityName, entity ) );
	}
	return EntityState.DETACHED;
}
 

/**
 * Prepares the save call by checking the session caches for a pre-existing
 * entity and performing any lifecycle callbacks.
 *
 * @param entity The entity to be saved.
 * @param id The id by which to save the entity.
 * @param persister The entity's persister instance.
 * @param useIdentityColumn Is an identity column being used?
 * @param context Generally cascade-specific information.
 * @param source The session from which the event originated.
 * @param requiresImmediateIdAccess does the event context require
 * access to the identifier immediately after execution of this method (if
 * not, post-insert style id generators may be postponed if we are outside
 * a transaction).
 *
 * @return The id used to save the entity; may be null depending on the
 * type of id generator used and the requiresImmediateIdAccess value
 */
protected CompletionStage<Void> reactivePerformSave(
		Object entity,
		Serializable id,
		EntityPersister persister,
		boolean useIdentityColumn,
		C context,
		EventSource source,
		boolean requiresImmediateIdAccess) {

	if ( LOG.isTraceEnabled() ) {
		LOG.tracev( "Saving {0}", MessageHelper.infoString( persister, id, source.getFactory() ) );
	}

	final EntityKey key;
	if ( !useIdentityColumn ) {
		key = source.generateEntityKey( id, persister );
		final PersistenceContext persistenceContext = source.getPersistenceContextInternal();
		Object old = persistenceContext.getEntity( key );
		if ( old != null ) {
			if ( persistenceContext.getEntry( old ).getStatus() == Status.DELETED ) {
				source.forceFlush( persistenceContext.getEntry( old ) );
			}
			else {
				return CompletionStages.failedFuture( new NonUniqueObjectException( id, persister.getEntityName() ) );
			}
		}
		persister.setIdentifier( entity, id, source );
	}
	else {
		key = null;
	}

	return reactivePerformSaveOrReplicate(
			entity,
			key,
			persister,
			useIdentityColumn,
			context,
			source,
			requiresImmediateIdAccess
	);
}
 

private boolean deleted(FlushEntityEvent event) {
    return event.getEntityEntry().getStatus() == Status.DELETED;
}
 

private void setHasNonReadOnlyEnties(Status status) {
	if ( status==Status.DELETED || status==Status.MANAGED || status==Status.SAVING ) {
		hasNonReadOnlyEntities = true;
	}
}
 

private void incrementRootVersion(FlushEntityEvent event, Object root) {
    EntityEntry entityEntry = event.getSession().getPersistenceContext().getEntry( Hibernate.unproxy( root) );
    if(entityEntry.getStatus() != Status.DELETED) {
        event.getSession().lock(root, LockMode.OPTIMISTIC_FORCE_INCREMENT);
    }
}
 

/**
 * Handle the given delete event.  This is the cascaded form.
 *
 * @param event The delete event.
 * @param transientEntities The cache of entities already deleted
 *
 * @throws HibernateException
 */
public void onDelete(DeleteEvent event, Set transientEntities) throws HibernateException {

	final EventSource source = event.getSession();

	final PersistenceContext persistenceContext = source.getPersistenceContext();
	Object entity = persistenceContext.unproxyAndReassociate( event.getObject() );

	EntityEntry entityEntry = persistenceContext.getEntry( entity );
	final EntityPersister persister;
	final Serializable id;
	final Object version;

	if ( entityEntry == null ) {
		LOG.trace( "Entity was not persistent in delete processing" );

		persister = source.getEntityPersister( event.getEntityName(), entity );

		if ( ForeignKeys.isTransient( persister.getEntityName(), entity, null, source ) ) {
			deleteTransientEntity( source, entity, event.isCascadeDeleteEnabled(), persister, transientEntities );
			// EARLY EXIT!!!
			return;
		}
		performDetachedEntityDeletionCheck( event );

		id = persister.getIdentifier( entity, source );

		if ( id == null ) {
			throw new TransientObjectException(
					"the detached instance passed to delete() had a null identifier"
			);
		}

		final EntityKey key = source.generateEntityKey( id, persister );

		persistenceContext.checkUniqueness( key, entity );

		new OnUpdateVisitor( source, id, entity ).process( entity, persister );

		version = persister.getVersion( entity );

		entityEntry = persistenceContext.addEntity(
				entity,
				(persister.isMutable() ? Status.MANAGED : Status.READ_ONLY),
				persister.getPropertyValues( entity ),
				key,
				version,
				LockMode.NONE,
				true,
				persister,
				false
		);
	}
	else {
		LOG.trace( "Deleting a persistent instance" );

		if ( entityEntry.getStatus() == Status.DELETED || entityEntry.getStatus() == Status.GONE ) {
			LOG.trace( "Object was already deleted" );
			return;
		}
		persister = entityEntry.getPersister();
		id = entityEntry.getId();
		version = entityEntry.getVersion();
	}

	/*if ( !persister.isMutable() ) {
		throw new HibernateException(
				"attempted to delete an object of immutable class: " +
				MessageHelper.infoString(persister)
			);
	}*/

	if ( invokeDeleteLifecycle( source, entity, persister ) ) {
		return;
	}

	deleteEntity(
			source,
			entity,
			entityEntry,
			event.isCascadeDeleteEnabled(),
			event.isOrphanRemovalBeforeUpdates(),
			persister,
			transientEntities
	);

	if ( source.getFactory().getSettings().isIdentifierRollbackEnabled() ) {
		persister.resetIdentifier( entity, id, version, source );
	}
}
 

private boolean deleted(FlushEntityEvent event) {
    return event.getEntityEntry().getStatus() == Status.DELETED;
}
 

private boolean scheduleUpdate(final FlushEntityEvent event) {
	final EntityEntry entry = event.getEntityEntry();
	final EventSource session = event.getSession();
	final Object entity = event.getEntity();
	final Status status = entry.getStatus();
	final EntityPersister persister = entry.getPersister();
	final Object[] values = event.getPropertyValues();

	if ( LOG.isTraceEnabled() ) {
		if ( status == Status.DELETED ) {
			if ( !persister.isMutable() ) {
				LOG.tracev(
						"Updating immutable, deleted entity: {0}",
						MessageHelper.infoString( persister, entry.getId(), session.getFactory() )
				);
			}
			else if ( !entry.isModifiableEntity() ) {
				LOG.tracev(
						"Updating non-modifiable, deleted entity: {0}",
						MessageHelper.infoString( persister, entry.getId(), session.getFactory() )
				);
			}
			else {
				LOG.tracev(
						"Updating deleted entity: ",
						MessageHelper.infoString( persister, entry.getId(), session.getFactory() )
				);
			}
		}
		else {
			LOG.tracev(
					"Updating entity: {0}",
					MessageHelper.infoString( persister, entry.getId(), session.getFactory() )
			);
		}
	}

	final boolean intercepted = !entry.isBeingReplicated() && handleInterception( event );

	// increment the version number (if necessary)
	final Object nextVersion = getNextVersion( event );

	// if it was dirtied by a collection only
	int[] dirtyProperties = event.getDirtyProperties();
	if ( event.isDirtyCheckPossible() && dirtyProperties == null ) {
		if ( !intercepted && !event.hasDirtyCollection() ) {
			throw new AssertionFailure( "dirty, but no dirty properties" );
		}
		dirtyProperties = ArrayHelper.EMPTY_INT_ARRAY;
	}

	// check nullability but do not doAfterTransactionCompletion command execute
	// we'll use scheduled updates for that.
	new Nullability( session ).checkNullability( values, persister, true );

	// schedule the update
	// note that we intentionally do _not_ pass in currentPersistentState!
	session.getActionQueue().addAction(
			new EntityUpdateAction(
					entry.getId(),
					values,
					dirtyProperties,
					event.hasDirtyCollection(),
					( status == Status.DELETED && !entry.isModifiableEntity() ?
							persister.getPropertyValues( entity ) :
							entry.getLoadedState() ),
					entry.getVersion(),
					nextVersion,
					entity,
					entry.getRowId(),
					persister,
					session
			)
	);

	return intercepted;
}
 

protected Serializable entityIsPersistent(SaveOrUpdateEvent event) throws HibernateException {
	final boolean traceEnabled = LOG.isTraceEnabled();
	if ( traceEnabled ) {
		LOG.trace( "Ignoring persistent instance" );
	}
	EntityEntry entityEntry = event.getEntry();
	if ( entityEntry == null ) {
		throw new AssertionFailure( "entity was transient or detached" );
	}
	else {

		if ( entityEntry.getStatus() == Status.DELETED ) {
			throw new AssertionFailure( "entity was deleted" );
		}

		final SessionFactoryImplementor factory = event.getSession().getFactory();

		Serializable requestedId = event.getRequestedId();

		Serializable savedId;
		if ( requestedId == null ) {
			savedId = entityEntry.getId();
		}
		else {

			final boolean isEqual = !entityEntry.getPersister().getIdentifierType()
					.isEqual( requestedId, entityEntry.getId(), factory );

			if ( isEqual ) {
				throw new PersistentObjectException(
						"object passed to save() was already persistent: " +
								MessageHelper.infoString( entityEntry.getPersister(), requestedId, factory )
				);
			}

			savedId = requestedId;

		}

		if ( traceEnabled ) {
			LOG.tracev(
					"Object already associated with session: {0}",
					MessageHelper.infoString( entityEntry.getPersister(), savedId, factory )
			);
		}

		return savedId;

	}
}
 

/**
 * Prepares the save call by checking the session caches for a pre-existing
 * entity and performing any lifecycle callbacks.
 *
 * @param entity The entity to be saved.
 * @param id The id by which to save the entity.
 * @param persister The entity's persister instance.
 * @param useIdentityColumn Is an identity column being used?
 * @param anything Generally cascade-specific information.
 * @param source The session from which the event originated.
 * @param requiresImmediateIdAccess does the event context require
 * access to the identifier immediately after execution of this method (if
 * not, post-insert style id generators may be postponed if we are outside
 * a transaction).
 *
 * @return The id used to save the entity; may be null depending on the
 *         type of id generator used and the requiresImmediateIdAccess value
 */
protected Serializable performSave(
		Object entity,
		Serializable id,
		EntityPersister persister,
		boolean useIdentityColumn,
		Object anything,
		EventSource source,
		boolean requiresImmediateIdAccess) {

	if ( LOG.isTraceEnabled() ) {
		LOG.tracev( "Saving {0}", MessageHelper.infoString( persister, id, source.getFactory() ) );
	}

	final EntityKey key;
	if ( !useIdentityColumn ) {
		key = source.generateEntityKey( id, persister );
		Object old = source.getPersistenceContext().getEntity( key );
		if ( old != null ) {
			if ( source.getPersistenceContext().getEntry( old ).getStatus() == Status.DELETED ) {
				source.forceFlush( source.getPersistenceContext().getEntry( old ) );
			}
			else {
				throw new NonUniqueObjectException( id, persister.getEntityName() );
			}
		}
		persister.setIdentifier( entity, id, source );
	}
	else {
		key = null;
	}

	if ( invokeSaveLifecycle( entity, persister, source ) ) {
		return id; //EARLY EXIT
	}

	return performSaveOrReplicate(
			entity,
			key,
			persister,
			useIdentityColumn,
			anything,
			source,
			requiresImmediateIdAccess
	);
}