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https://issues.apache.org/jira/browse/OPENJPA-1784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907210#action_12907210
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Harald Wellmann edited comment on OPENJPA-1784 at 9/8/10 9:37 AM:
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The attachment MapUpdate.patch contains a unit test exhibiting the problem. A
test which updates a map key passes. Another test which only update the map
value fails.
was (Author: hwellmann):
Unit test exhibiting the problem. A test which updates a map key passes.
Another test which only update the map value fails.
> Map value updates not flushed
> -----------------------------
>
> Key: OPENJPA-1784
> URL: https://issues.apache.org/jira/browse/OPENJPA-1784
> Project: OpenJPA
> Issue Type: Bug
> Components: jdbc
> Affects Versions: 2.0.1
> Reporter: Harald Wellmann
> Attachments: MapUpdate.patch
>
>
> I have an entity with a map element collection where the map value is an
> Embeddable.
> @Embeddable
> public class LocalizedString {
> private String language;
> private String string;
> // getters and setters omitted
> }
>
> @Entity
> public class MultilingualString {
> @Id
> private long id;
> @ElementCollection(fetch=FetchType.EAGER)
> private Map<String, LocalizedString> map = new HashMap<String,
> LocalizedString>();
> }
> Given a persistent instance m of my entity, I update a member of a given map
> value and then merge the modified entity:
> EntityManager em = ...;
> em.getTransaction().begin();
> m.getMap().get("en").setString("foo");
> em.merge(m)
> em.getTransaction().commit();
>
> The problem is, the state change of the map does not get saved to the
> database. With DEBUG logging on, I can see that the flush on commit does not
> trigger any SQL UPDATE.
> To force the update, I have to put a new value into the map instead of just
> changing the existing one.
> EntityManager em = ...;
> em.getTransaction().begin();
> m.getMap().put("en"), new LocalizedString("en", "foo"));
> em.merge(m)
> em.getTransaction().commit();
> After this change, I do see the expected UPDATE.
> My Embeddable does have hashCode() and equals() implemented such that the
> changed map is not equal() to the former version in either case.
> This looks like a bug in the dirty-checking logic in OpenJPA.
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