reto wrote:
Hi togheter,
I want to retrieve only a subset of the attributes of an object (not retrieving the blobs in the object). I use the PersistenceBroker API. Can anybody give me a hint if that's possible without going back and using sql direct? thanks reto
- you can use Report Queries to retrieve a subset based on object value arrays.
http://db.apache.org/ojb/query.html#report%20queries
(Maven has corrupt this section, please use your local docs, call "ant htmldoc" to generate)
- Or you can declare two classes/class-descriptors with and without the Blob field.
- Or you "roll out" the blob fields in a new class and use a 1:1 reference.
- Or you can use metadata profiles on a per thread basis. This allows you to change metadata at runtime (see javadoc of MetadataManager, recommended only for expert user, because you have to take care of cache)
regards, Armin
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