Hi,
I am trying to change all hbm files to annotation based .

Take my hbm file below,
<hibernate-mapping>
<class name="com.wipro.wiprosrm.utils.vo.FeedSummaryVO" table="feed_summary">
<composite-id name="feedSummaryPK">
<key-property name="orgId" column="org_id"/>
<key-property name="channelId" column="channel_id"/>
<key-property name="keyword" column="keyword"/>
<key-property name="summarizeDate" column="summarize_date" type="date"/>
</composite-id>
<property name="hitCount" column="hit_count"/>
</class>
</hibernate-mapping>
I have changed as Annotation based(see below)

@Entity
@Table(name = "feed_summary")
public class FeedSummaryVO implements Serializable{
/**
*/
private static final long serialVersionUID = 1L;
@Id
private FeedSummaryPK feedSummaryPK;
@Column(name = "hit_count")
private int hitCount;

public int getHitCount() {
return hitCount;
}

public void setHitCount(int hitCount) {
this.hitCount = hitCount;
}
}
and ,

@Embeddable
public class FeedSummaryPK implements Serializable{
/**
*/
private static final long serialVersionUID = 1L;
@Column(name = "org_id")
private Long orgId;
@Column(name = "channel_id")
private Long channelId;
@Column(name = "keyword")
private String keyword;
@Column(name = "summarize_date")
private Date summarizeDate;

public FeedSummaryPK(Long orgId,Long channelId,String keyword,Date summarizeDate){
this.orgId = orgId;
this.channelId = channelId;
this.keyword = keyword;
this.summarizeDate = summarizeDate;
}

public FeedSummaryPK(){
}

public Long getOrgId() {
return orgId;
}

public void setOrgId(Long orgId) {
this.orgId = orgId;
}

public Long getChannelId() {
return channelId;
}

public void setChannelId(Long channelId) {
this.channelId = channelId;
}

public String getKeyword() {
return keyword;
}

public void setKeyword(String keyword) {
this.keyword = keyword;
}

public Date getSummarizeDate() {
return summarizeDate;
}

public void setSummarizeDate(Date summarizeDate) {
this.summarizeDate = summarizeDate;
}

public boolean equals(Object arg0) {
if (arg0 == null)
return false;
if (!(arg0 instanceof FeedSummaryPK))
return false;
FeedSummaryPK arg1 = (FeedSummaryPK) arg0;
return (this.orgId.longValue() == arg1.getOrgId().longValue())
&& (this.channelId.longValue() == arg1.getChannelId()
.longValue()) && (this.keyword == arg1.getKeyword())
&& (this.summarizeDate.equals(arg1.getSummarizeDate()));

}

public int hashCode() {
int hsCode;
hsCode = (orgId + channelId + keyword + summarizeDate).hashCode();
hsCode = 19 * hsCode;
System.out.println("hashcode :: "+hsCode);
return hsCode;
}
}Problem:
If i use hbm file,
i am able to read,save and update the FeedSummaryVO object
if i use annotation based,
i am able to read and save but i am getting the following error when i am doing the update

[color=#FF0000org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1[/color]I am using session.merge(obj). i tried with session.update() and session.saveOrUpate() also.

Kindly guide me how to resolve this issue

Thanks,
John