ShapefileRenderer delegation to streaming rendering breaks multilayer labelling
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Key: GEOT-1561
URL: http://jira.codehaus.org/browse/GEOT-1561
Project: GeoTools
Issue Type: Improvement
Components: ext shapefilerender
Affects Versions: 2.4-RC0, 2.5-M0
Reporter: Andrea Aime
Assignee: Jesse Eichar
Fix For: 2.4-RC1, 2.5-M1
Jesse, as usual assigning to you for review
The shapefile renderer delegates single layers to the streaming renderer,
meaning each will be labelled separately and labels will be covered by the
geometries of the upper level layers.
A workaround is to pass the streaming renderer a label cache that:
* wraps the shapefile renderer main label cache (so that everything stores
labels in the same label cache)
* turns end() into a no-op so that only the shapefile renderer can trigger the
start of labelling operations
when all of the layers have been renderer.
This is a temporary solution, the real one is to get rid of the shapefile
renderer, but to do so we have to migrate the optimized shapefile handlers
onto the shapefile datastore and double check the performance is the same after
the move.
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