SataConnector - Prevent Look-Ups is Value is Null

[Joshua Brodie]

Hi Everyone:

Coming back to Shibboleth after a 12m project hiatus elsewhere - my mind is
a bit raw and picking things up again.

I have the following DataConnector in the 'attribute-resolver.xml' - to
pick up employee status upon user entering username/password - the data
connector performs the DB lookup irrespective if the user has an employee
number or not (a NULL look-up) - this understandably drives our DBA up the
wall. Is there a way to prevent the DB look-up if employee number is null?

<resolver:DataConnector ....>
<resolver:Dependency ref="employee" />
<ContainerManagedConnection resourceName="java:comp/env/jdbc/CWLDB"  />
~
select STATUS from TABLE where EMPLID='$employeeKeywordValue.get(0)'
~
</resolver:DataConnector>

Thanks.
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