Java CollectionType.UNFETCHED_COLLECTION属性代码示例

@Override
Object processCollection(Object collection, CollectionType type) throws HibernateException {

	if ( collection == CollectionType.UNFETCHED_COLLECTION ) {
		return null;
	}

	EventSource session = getSession();
	CollectionPersister persister = session.getFactory().getCollectionPersister( type.getRole() );

	final Serializable collectionKey = extractCollectionKeyFromOwner( persister );
	if ( collection!=null && (collection instanceof PersistentCollection) ) {
		PersistentCollection wrapper = (PersistentCollection) collection;
		if ( wrapper.setCurrentSession(session) ) {
			//a "detached" collection!
			if ( !isOwnerUnchanged( wrapper, persister, collectionKey ) ) {
				// if the collection belonged to a different entity,
				// clean up the existing state of the collection
				removeCollection( persister, collectionKey, session );
			}
			reattachCollection(wrapper, type);
		}
		else {
			// a collection loaded in the current session
			// can not possibly be the collection belonging
			// to the entity passed to update()
			removeCollection(persister, collectionKey, session);
		}
	}
	else {
		// null or brand new collection
		// this will also (inefficiently) handle arrays, which have
		// no snapshot, so we can't do any better
		removeCollection(persister, collectionKey, session);
	}

	return null;
}
 

@Override
public Object processCollection(Object collection, CollectionType type) throws HibernateException {
	if ( collection == CollectionType.UNFETCHED_COLLECTION ) {
		return null;
	}

	final EventSource session = getSession();
	final CollectionPersister persister = session.getFactory().getCollectionPersister( type.getRole() );

	if ( isUpdate ) {
		removeCollection( persister, extractCollectionKeyFromOwner( persister ), session );
	}
	if ( collection != null && collection instanceof PersistentCollection ) {
		final PersistentCollection wrapper = (PersistentCollection) collection;
		wrapper.setCurrentSession( session );
		if ( wrapper.wasInitialized() ) {
			session.getPersistenceContext().addNewCollection( persister, wrapper );
		}
		else {
			reattachCollection( wrapper, type );
		}
	}
	else {
		// otherwise a null or brand new collection
		// this will also (inefficiently) handle arrays, which
		// have no snapshot, so we can't do any better
		//processArrayOrNewCollection(collection, type);
	}

	return null;

}
 

/**
 * {@inheritDoc}
 */
Object processCollection(Object collection, CollectionType type) throws HibernateException {
	
	if ( collection == CollectionType.UNFETCHED_COLLECTION ) {
		return null;
	}

	EventSource session = getSession();
	CollectionPersister persister = session.getFactory().getCollectionPersister( type.getRole() );

	final Serializable collectionKey = extractCollectionKeyFromOwner( persister );
	if ( collection!=null && (collection instanceof PersistentCollection) ) {
		PersistentCollection wrapper = (PersistentCollection) collection;
		if ( wrapper.setCurrentSession(session) ) {
			//a "detached" collection!
			if ( !isOwnerUnchanged( wrapper, persister, collectionKey ) ) {
				// if the collection belonged to a different entity,
				// clean up the existing state of the collection
				removeCollection( persister, collectionKey, session );
			}
			reattachCollection(wrapper, type);
		}
		else {
			// a collection loaded in the current session
			// can not possibly be the collection belonging
			// to the entity passed to update()
			removeCollection(persister, collectionKey, session);
		}
	}
	else {
		// null or brand new collection
		// this will also (inefficiently) handle arrays, which have
		// no snapshot, so we can't do any better
		removeCollection(persister, collectionKey, session);
	}

	return null;
}
 

final Object processArrayOrNewCollection(Object collection, CollectionType collectionType)
throws HibernateException {

	final SessionImplementor session = getSession();

	if (collection==null) {
		//do nothing
		return null;
	}
	else {
		CollectionPersister persister = session.getFactory().getCollectionPersister( collectionType.getRole() );

		final PersistenceContext persistenceContext = session.getPersistenceContext();
		//TODO: move into collection type, so we can use polymorphism!
		if ( collectionType.hasHolder( session.getEntityMode() ) ) {
			
			if (collection==CollectionType.UNFETCHED_COLLECTION) return null;

			PersistentCollection ah = persistenceContext.getCollectionHolder(collection);
			if (ah==null) {
				ah = collectionType.wrap(session, collection);
				persistenceContext.addNewCollection( persister, ah );
				persistenceContext.addCollectionHolder(ah);
			}
			return null;
		}
		else {

			PersistentCollection persistentCollection = collectionType.wrap(session, collection);
			persistenceContext.addNewCollection( persister, persistentCollection );

			if ( log.isTraceEnabled() ) log.trace( "Wrapped collection in role: " + collectionType.getRole() );

			return persistentCollection; //Force a substitution!

		}

	}

}
 

Object processCollection(Object collection, CollectionType type)
		throws HibernateException {

	if ( collection == CollectionType.UNFETCHED_COLLECTION ) {
		return null;
	}

	EventSource session = getSession();
	CollectionPersister persister = session.getFactory().getCollectionPersister( type.getRole() );

	if ( isUpdate ) {
		removeCollection( persister, extractCollectionKeyFromOwner( persister ), session );
	}
	if ( collection != null && ( collection instanceof PersistentCollection ) ) {
		PersistentCollection wrapper = ( PersistentCollection ) collection;
		wrapper.setCurrentSession( session );
		if ( wrapper.wasInitialized() ) {
			session.getPersistenceContext().addNewCollection( persister, wrapper );
		}
		else {
			reattachCollection( wrapper, type );
		}
	}
	else {
		// otherwise a null or brand new collection
		// this will also (inefficiently) handle arrays, which
		// have no snapshot, so we can't do any better
		//processArrayOrNewCollection(collection, type);
	}

	return null;

}
 

final Object processArrayOrNewCollection(Object collection, CollectionType collectionType)
		throws HibernateException {

	final SessionImplementor session = getSession();

	if ( collection == null ) {
		//do nothing
		return null;
	}
	else {
		CollectionPersister persister = session.getFactory().getCollectionPersister( collectionType.getRole() );

		final PersistenceContext persistenceContext = session.getPersistenceContext();
		//TODO: move into collection type, so we can use polymorphism!
		if ( collectionType.hasHolder() ) {

			if ( collection == CollectionType.UNFETCHED_COLLECTION ) {
				return null;
			}

			PersistentCollection ah = persistenceContext.getCollectionHolder( collection );
			if ( ah == null ) {
				ah = collectionType.wrap( session, collection );
				persistenceContext.addNewCollection( persister, ah );
				persistenceContext.addCollectionHolder( ah );
			}
			return null;
		}
		else {

			PersistentCollection persistentCollection = collectionType.wrap( session, collection );
			persistenceContext.addNewCollection( persister, persistentCollection );

			if ( LOG.isTraceEnabled() ) {
				LOG.tracev( "Wrapped collection in role: {0}", collectionType.getRole() );
			}

			return persistentCollection; //Force a substitution!

		}

	}

}
 

/**
 * Cascade to the collection elements
 */
private void cascadeCollectionElements(
		final Object child,
		final CollectionType collectionType,
		final CascadeStyle style,
		final Type elemType,
		final Object anything,
		final boolean isCascadeDeleteEnabled) throws HibernateException {
	// we can't cascade to non-embedded elements
	boolean embeddedElements = eventSource.getEntityMode()!=EntityMode.DOM4J ||
			( (EntityType) collectionType.getElementType( eventSource.getFactory() ) ).isEmbeddedInXML();

	boolean reallyDoCascade = style.reallyDoCascade(action) &&
		embeddedElements && child!=CollectionType.UNFETCHED_COLLECTION;

	if ( reallyDoCascade ) {
		if ( log.isTraceEnabled() ) {
			log.trace( "cascade " + action + " for collection: " + collectionType.getRole() );
		}

		Iterator iter = action.getCascadableChildrenIterator(eventSource, collectionType, child);
		while ( iter.hasNext() ) {
			cascadeProperty(
					iter.next(),
					elemType,
					style,
					anything,
					isCascadeDeleteEnabled
				);
		}

		if ( log.isTraceEnabled() ) {
			log.trace( "done cascade " + action + " for collection: " + collectionType.getRole() );
		}
	}

	final boolean deleteOrphans = style.hasOrphanDelete() &&
			action.deleteOrphans() &&
			elemType.isEntityType() &&
			child instanceof PersistentCollection; //a newly instantiated collection can't have orphans

	if ( deleteOrphans ) { // handle orphaned entities!!
		if ( log.isTraceEnabled() ) {
			log.trace( "deleting orphans for collection: " + collectionType.getRole() );
		}

		// we can do the cast since orphan-delete does not apply to:
		// 1. newly instantiated collections
		// 2. arrays (we can't track orphans for detached arrays)
		final String entityName = collectionType.getAssociatedEntityName( eventSource.getFactory() );
		deleteOrphans( entityName, (PersistentCollection) child );

		if ( log.isTraceEnabled() ) {
			log.trace( "done deleting orphans for collection: " + collectionType.getRole() );
		}
	}
}