Hi all.
I'm new to hibernate, and have found a problem when mapping a map using annotations.

I've been using hbm files, but want to move to annotations.

Let me explain myself :

Entity PLAN
<id name="plan_id"> <-- auto generated pk
...
...
<map name="browsing_thresholds" table="DATAPLAN_BROWSING_THRESHOLDS" lazy="true" cascade="delete" >
<key column="PLAN_ID" />
<map-key column="THRESHOLD" type="double" />
<element column="MESSAGE" type="string" length="160" />
</map>

This, maps to the following in MySql ..
+-----------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+-------+
| PLAN_ID | bigint(20) | NO | PRI | NULL | |
| MESSAGE | varchar(160) | YES | | NULL | |
| THRESHOLD | double | NO | PRI | NULL | |
+-----------+--------------+------+-----+---------+-------+


But i do not know how to use it in annotations.
All i get is :

@OneToMany(mappedBy="dataplan")
@MapKey(name="THRESHOLD")
private Map <Double, String> vol_thresholds = new HashMap<Double,String>();

But do not know how to map the table name , or the MESSAGE column.

Please help me :)

This is just an example available in the API docs. Something like this would do:
@Entity
public class Software {
@OneToMany(mappedBy="software")
@MapKey(name="codeName")
public Map<String, Version> getVersions() {
return versions;
}
...
}

@Entity
@Table(name="tbl_version")
public class Version {
public String getCodeName() {...}

@ManyToOne
public Software getSoftware() { ... }
...
}

In your scenario, your message column will be part of another entity that represents the element to be stored in your map. You must have two entities as described above

Ok, so it was what i was afraid of .. two entities ...
Thanks a lot :-(

Yep, it is similar to your hbm concept. Even your hbm would define 2 entities. Nothing changes except the way you represent. All rules of hbm hold good for annotations as well.