Question on QueryByIdenty

[Juergen Ebert <ju...@web.de>]

I've written a test case that queries for an object with a
QueryByIdentity after it has been deleted from the database. Contrary to
my expectations, broker.getObjectByQuery() still returns an object
instead of null! 

Null is only returned if I either use QueryByCriteria instead of
QueryByIdentity or if I remove a previous lookup operation (please see
below).

Could someone please tell me what is going on here? I'm using OJB 1.0
RC4. Here is the code:


    PersistenceBroker broker =
PersistenceBrokerFactory.defaultPersistenceBroker();
    Lv lv = new Lv("Test");
    
    broker.beginTransaction();
    broker.store(lv);
    broker.commitTransaction();

    int oid = lv.getObjectId();
    Identity id = new Identity(Lv.class, LvObject.class, new Object[] {
new Integer(oid) });
    Query query = QueryFactory.newQuery(id);

    /* This works!
    Criteria crit = new Criteria();
    crit.addEqualTo("objectId", new Integer(oid));
    Query query = QueryFactory.newQuery(Lv.class, crit);
    */

    // retrieve again (It works if this step is removed!)
    lv = (Lv)broker.getObjectByQuery(query);
    assertNotNull(lv);

    // delete
    broker.beginTransaction();
    broker.delete(lv);  // rows are successfully deleted from database!
    broker.commitTransaction();

    // retrieve again    
    lv = (Lv)broker.getObjectByQuery(query);
    assertNull("Lv should be null after delete", lv);
    
    broker.close();


Thanks,
Jürgen


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