ItemDaoImpl.java 文件源码

@Override
@Transactional(propagation = Propagation.MANDATORY)
public ListMultimap<Item, Attachment> getAttachmentsForItems(Collection<Item> items)
{
    if( items.isEmpty() )
    {
        return ImmutableListMultimap.of();
    }
    List<Attachment> attachments = getHibernateTemplate().findByNamedParam(
        "select a from Item i join i.attachments a where i in (:items) order by index(a) ASC", "items", items);
    ListMultimap<Item, Attachment> multiMap = ArrayListMultimap.create();
    for( Attachment attachment : attachments )
    {
        multiMap.put(attachment.getItem(), attachment);
    }
    return multiMap;
}