Build a CachingDataStore 
-------------------------

                 Key: GEOT-944
                 URL: http://jira.codehaus.org/browse/GEOT-944
             Project: GeoTools
          Issue Type: Improvement
          Components: data
    Affects Versions: 2.3
            Reporter: Andrea Aime
         Assigned To: Andrea Aime


Move the cache out of current streaming renderer, use a regular grid (or a 
quadtree?), use ehcache or jboss cache (is there a cache provider facade?) , 
key by feature source, query, x, y.

How to handle SLD as well (to improve the filter in the query)? That's an open 
question... maybe add a "cacheable" flag to query.... or even better do a 
CacheableDataStore that acts as a wrapper around a normal data store.


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