ItemDaoImpl.java 文件源码

@Override
@Transactional(propagation = Propagation.MANDATORY)
public Multimap<Long, String> getCollaboratorsForItemIds(Collection<Long> itemIds)
{
    if( itemIds.isEmpty() )
    {
        return ImmutableMultimap.of();
    }
    List<Object[]> attachments = getHibernateTemplate().findByNamedParam(
        "select c, i.id from Item i join i.collaborators c where i.id in (:items)", "items", itemIds);
    ListMultimap<Long, String> multiMap = ArrayListMultimap.create();
    for( Object[] attachmentRow : attachments )
    {
        multiMap.put((Long) attachmentRow[1], (String) attachmentRow[0]);
    }
    return multiMap;
}