ItemDaoImpl.java 文件源码

@Override
@Transactional(propagation = Propagation.MANDATORY)
public ListMultimap<Long, Attachment> getAttachmentsForItemIds(Collection<Long> ids)
{
    if( ids.isEmpty() )
    {
        return ImmutableListMultimap.of();
    }
    List<Object[]> attachments = getHibernateTemplate().findByNamedParam(
        "select a, i.id from Item i join i.attachments a where i.id in (:items) order by index(a) ASC", "items",
        ids);
    ListMultimap<Long, Attachment> multiMap = ArrayListMultimap.create();
    for( Object[] attachmentRow : attachments )
    {
        multiMap.put((Long) attachmentRow[1], (Attachment) attachmentRow[0]);
    }
    return multiMap;
}