Hi Gabriella,

2014-11-07 3:06 GMT+01:00 Gabriella Turek <gabriella.tu...@niwa.co.nz>:

> Say I have an attribute “roof type” and the choices are “tin” “wood” tile”
> How do I query an AttributeDescriptor to obtain those values?
>

I don't think you can get unique values from AttributeDescriptor(s). Do you
have some database constraint on that attribute at the database level that
restricts accepted values to the two you mentioned? Maybe you can get them
using the low-level JDBC functionalities (if we are talking of a database
accessed through JDBC).

Instead, if you simply want to get all unique values doing a sort of
distinct query on the real data, you can do that using
the Collection_UniqueFunction or the underlying UniqueVisitor.

Mauro



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