[hibernate-issues] [Hibernate-JIRA] Created: (HHH-4043) automatic dirty check does not work with lobs

[Stefan Wachter (JIRA)]

automatic dirty check does not work with lobs
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                 Key: HHH-4043
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4043
             Project: Hibernate Core
          Issue Type: Improvement
    Affects Versions: 3.3.2, 3.3.1
            Reporter: Stefan Wachter


When a lob (a blob or a clob) is modified by truncate or by setOutputStream/setCharacterStream then field is not detected as being dirty.

The reason seems to be that the BlobType and ClobType determine the dirtyness of such fields by checking object identity of the java.sql.Blob / Clob members.

Maybe the behaviour could be improved by the following way:

- Blobs and Clobs seem always to be wrapped by org.hibernate.lob.SerializableBlob / SerializableClob
- These classes could be augmented by a dirty flag that is set if truncate or setOutputStream / setCharacterStream is set
- The BlobType/ClobType should no more determine the dirtyness by checking object identity but by using this flag

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