Hibernate中的过滤集合类Filtering collections

String hql = "select p from Picgroup p join p.images t where p.id=" + groupid;
Query query = session.createQuery(hql);
List list = query.list();
Picgroup group = (Picgroup) list.get(0);
view.setName(group.getName());
view.setId(groupid);
Collection image=session.filter(group.getImages(),"select this where this.state=´C´");
//这里只取出state等于C的数据
Iterator ite = image.iterator();