I have a table that maps to a base object called JavaComponent that has an Id of componentId.

Extending this object is a table called ContentProcessor, which has a componentid and a configurationid.

I also need to load JavaComponents sometimes, and ContentProcessors. My JavaComponent looks like this:

@Entity
@Inheritance(strategy=InheritanceType.JOINED)
public class JavaComponent implements Serializable {
@Id
public Long getComponentId() {
return super.getId();
}
}

And the ContentProcessor looks like:

@Entity
public class ContentProcessor extends JavaComponent implements Serializable {
private Long configurationId = null;

@Id
public Long getConfigurationId() {
return configurationId;
}
}

I'd like for ContentProcessor to have both the componentid and configurationid as keys, but the runtime isn't allowing this. I've tried to override the getComponentId() to add this as an Id.

I get this:

Unable to define/override @Id(s) on a subclass: com.retrievers.model.bo.ContentProcessor

How do I get around this problem?

Are you guys working for the same company?
http://forum.hibernate.org/viewtopic.php?p=2297800#2297800