[WO45] Problem with a new EOQualifier subclass in Java

Hi,


I've developed a new EOQualifier subclass in Java called
SoundExQualifier that permits SoundEx comparison on a DBMS that support
it like Microsoft SQL Server (i.e. "DIFFERENCE(keyPath, value) >=
similariryLevel").

When I use this qualifier with a simple EOFetchSpecification, it works
like a charm.

But I can't use it with a WODisplayGroup. When the WODisplayGroup method
qualifyDataSource() is called, an exception is thrown:


NSInvalidArgumentException: ***
-qualifierMigratedFromEntity:relationshipPath: cannot be sent to an
abstract object of class
com/genilog/webobjects/eocontrol/SoundExQualifier: Create a concrete
instance!


Why do I get a such exception? I don't implements EOQualifierEvaluation
because I don't want to support in memory fetch, so there is no
evaluateWithObject(Object) method. I've tried to define a
qualifierMigratedFromEntity(EOEntity, String) method too that returns a
SoundExQualifier clone, but it doesn't work. Can anyone help me?


Kind regards,

-- 
Francis Labrie                                [email protected]
Montréal, Québec
Canada