获得一个更新的行许多使用Hibernate的映射(get updated row in one to

我有两个问题的实体和Issue_Tracker 。我曾在一个一对多的映射加入这两个表。在Issue_Tracker ，我们可以有多个条目像

  issue_id  tracker_status      tracked_time
    123     Assigned           1/8/2013 11:44
    123     Assigned           1/8/2013 11:45
    123     Completed          1/8/2013 11:52
    32      Assigned           1/9/2013 16:46
    33      Assigned           1/9/2013 16:47
    33      Cancel             1/9/2013 16:49

我想订购由tracked_time的Issue_tracker实体，所以我只能得到一次更新tracker_status 。我现在用的标准来获取数据，但是我得到第一个项目，例如：对于ISSUE_ID 123，我得到tracker_status指派的，但我想取tracker_status : Completed对ID 123.如何实现这一目标。吾道如下：

     Criteria criteria = session.createCriteria(Issue.class);
     criteria.setFirstResult(from);
     criteria.setMaxResults(size);
     criteria.setFetchMode("Issue.issueTracker",FetchMode.JOIN);
     criteria.add(Restrictions.eq("status", "Escalate To"));
      return criteria.list();

Issue.java

public class Issue implements Serializable
        {
        private Integer issue_id;
        private String  issue_description;
        private Date issue_raised_date;
        private Set<Issue_Tracker> issueTracker = new HashSet<Issue_Tracker>(0);



        @OneToMany(fetch=FetchType.LAZY, mappedBy="issue_id")
        public Set<Issue_Tracker> getIssueTracker() {
        return issueTracker;
    }

        public void setIssueTracker(Set<Issue_Tracker> issueTracker) {
        this.issueTracker = issueTracker;

Issue_Tracker.java

public class Issue_Tracker implements Serializable
{  
     private Integer   issue_id;
     private String    tracker_status;
     private Timestamp tracked_time;

我希望你们能得到什么，我想问问，任何帮助吗？

添加@OrderBy注释映射集合。这应该由跟踪时间排序的集中返回的实体。在设置的第一个实体应该是最新的。

//Issue.java
    @OneToMany(fetch=FetchType.LAZY, mappedBy="issue_id")
    @OrderBy("tracked_time DESC")
    public Set<Issue_Tracker> getIssueTracker() {
    return issueTracker;

你也可以试试：

 Criteria criteria = session.createCriteria(Issue.class);
 criteria.setFirstResult(from);
 criteria.setMaxResults(size);
 criteria.setFetchMode("Issue.issueTracker",FetchMode.JOIN);
 criteria.add(Restrictions.eq("status", "Escalate To"));
 Criteria subCriteria = criteria.createCriteria("issueTracker");
 subCriteria.addOrder(Order.desc("tracked_time"));
 return criteria.list();