CayenneDataObject's "validateForInsert, validateForUpdate, validateForDelete"

From: Alex Gunawan Wibowo (netzone_tec..ahoo.com)
Date: Wed Dec 22 2004 - 23:36:13 EST

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    Hello,

    I have a question about the "validateForInsert,
    validateForUpdate, validateForDelete" methods.

    I'm not sure when is the right time to call them.
    What I did is I just call them prior to calling
    datacontext's commitChanges(). If the validation
    result is
    empty, then proceed with commitChanges(). Am I right?

    For validateForUpdate(), this is what I did:
    1. Obtain the record from database
    2. Update necessary properties
    3. Call validateForUpdate()
    4. if validation result is empty, then proceed with
       data context's commitChanges().

    For validateForDelete():
    1. Obtain the record from database
    2. Call validateForDelete()
    3. If validation result is empty, call data context's
       deleteObject, then commitChanges().

    Is this correct? Is it worth to perform these
    validation, or is it necessary just to leave it to
    DataContext's commitChanges(), and catch the
    CayenneRuntimeException if anything goes wrong?

    Also, there is something wrong with the way I call
    validateForDelete() above. Sometimes, although the
    validation result is empty, I still encountered
    cayenneruntime exception when performing
    commitChanges() (usually because of the foreign key
    constraints). In this case, what is
    validateForDelete() for??? or.. do i have to check it
    manually, since the API says that validateForDelete()
    does nothing?

    Thanks a lot for the help, and apology for the basic
    question..

    Best regards,

    =====
    Alex Wibowo
                ~ Second is a failure ~
    ==============================================

                    
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