Hi,
I was looking at splitting main into smaller bits to avoid some split
package issues, ideally
trying to to towards a gt-data (everything vector), gt-style (styling) and
and almost empty gt-main
to collect the residuals, with gt-main depending on the two above... and
realized it's not possible.

The reason is mostly CommonFactoryFinder... the class is something many
class depend on, and it
depends in turn on geotools packages:

import org.geotools.data.FeatureLockFactory;
import org.geotools.data.FileDataStoreFactorySpi;
import org.geotools.feature.FeatureCollections;
import org.geotools.filter.FunctionFactory;
import org.geotools.styling.StyleFactory;

Long story short, if classes in those packages depend on
CommonFactoryFinder, and CommonFactoryFinder
depends on the factories in those packages, we're toast, there is no way to
break main apart.
The ways to solve it seem too heavy for an after-sprint change, but
thinking out loud:

   - Make CommonFactoryFinder only return opengis factories... we'd likely
   miss methods by doing that
   - Resurrect the single factory finders, have GeoTools code rely on them,
   and leave CommonFactoryFinder for client usage
   - Move those factories in another package


Aside, I'm solving the styling split package the other way around, merging
back everything into main and
moving a couple of renderer classes in another package. It's a small
change, a dozen classes affected in
GeoTools and a few in GeoServer.

Cheers
Andrea

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