[SNMP4J] RE: Context-sensitive columnar value validation

[Frank Fock]

Hi Mike,

You several options for columns:

(1) Overwrite MOMutableColumn.validateSetRequest if you want
to verify a change with row context based on your column
implementation.
(2) Overwrite MOMutableRow2PC.prepare if you want to verify
a column change within the context of the row.
(3) Overwrite MOMutableRow2PC.prepareRow if you want to
verify a row change an atomic change on the row.
(..) Other approaches include using MOValueValidationListener
as noted by you already.

I would prefer either (2) or (3) for returning a
INCONSISTENT_VALUE error.

Best regards,
Frank

Mike Nuss wrote:
> Ack! adding line wraps...
>  
> I'm wondering how to validate columnar values.  For scalars, there's an
> isValueOK method that I can override.  For columns it seems I'm stuck with
> using an MOValueValidationListener.  But the validate method contains only
> the value of the variable, and not enough context to know which row of the
> table is being modified.  For example, I'd like to return an
> INCONSISTENT_VALUE error if the user has tried to set a value that may be
> valid in some cases, but is not consistent with the rest of the row.
> 
> Any suggestions?
> 
> Thanks,
> Mike
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