We would like to have a table that represents 3 or 4 different classes that
share a common base class.  When objects are created out of the table, one
column in the table indicates which concrete class should be instantiated.
These objects are refered to by a handful of different classes.  I thought
this was a perfect job for a RowReader, but the RowReader example seems to
be a case of instantiating two objects out of one row, and our attempts at
variations have not met with success.

What is the correct approach to this?

David


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