I was having an issue in uDig with loading WFS data.

The problem boiled down to Geotools trying to encode a filter that 
looked similar to "Filter.EXCULDES AND bbox...".  This encoding failed 
because "org.opengis.filter.ExcludeFilter cannot be cast to 
org.geotools.filter.Filter".

The simple solution for this was to update the StreamingRenderer to 
simplify filters using the SimplifyingFilterVisitor.  This simiplifies 
the expression down to Filter.EXCULDES which we don't seem to have any 
problems encoding.

Emily

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