Sorry, I have found the Hibernate bug describing this:
http://opensource.atlassian.com/projects/hibernate/browse/ANN-140?page=all
(It is amazing that you always find the bug report only after you tried to
describe the problem yourself.)
Since I don't know anything about the hibernate sources I will not even try to
supply the 3k lines mentioned in the bug report but I have a dirty little
workaround:
| @Entity
| @Inheritance(strategy=JOINED)
| //@DiscriminatorColumn(name="YOUR_DTYPE")
| public abstract class parent {
|
| @Id
| Integer id;
|
| @Column(name="YOUR_DTYPE",length=31)
| public String getDiscriminatorValue() {
|
| DiscriminatorValue discriminatorValueAnnotation =
this.getClass().getAnnotation(DiscriminatorValue.class);
|
| if (discriminatorValueAnnotation != null) {
| return discriminatorValueAnnotation.value();
| }
|
| return this.getClass().getSimpleName();
| }
|
| public void setDiscriminatorValue(String dummy) {
| }
|
| }
|
It is double plus unbeautiful but it works. Should this ever be fixed you can
simply remove the workaround and everything should work as expected.
Regards
Felix
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