Hi Christian, I will delegate to Andrea on this one since he is the rendering expert but I will say that imo this is a perfectly valid use of a query hint. And indeed afaik many other type of hints are passed down by the render to perform similar functions like decimation, etc...
2c, -Justin Christian Müller wrote: > Last week I posed a question about having a FeatureSource which has also > some generalizations of the vector data to speed up response time and reduce > data transfer. > > While it is is surely not the problem to implement such a FeatureSource, I > need the ScaleDenominator from the caller. > > I studied the source and I want to ask the specialists about the following > assumptions: > > 1) StreamingRenderer and ShapeFileRenderer use > FeatureSource>>getFeatures(queryObject) > 2) The Query interface offers the possibility to pass Hints > > My idea would be to pass the scaleDenominater as a hint to the queryObject. > This makes sense since > the scaleDenominator is only usefull for some use cases and should not be > part of the FeatureSource API. > > I am not sure here if the ScaleDenomintar is enough, perhaps a unit of > measure is also required. On the other side, the Query interface offers a > getter for the CRS, I think I can get the unit from the CRS, yes or no ? > > Anyway, if my assumptions come close to the truth, I would do such an > implementation and insert one line in the mentioned renderer classes to test > it. > > opinions ? > > ------------------------------------------------------------------------------ > _______________________________________________ > Geoserver-devel mailing list > Geoserver-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geoserver-devel -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. ------------------------------------------------------------------------------ _______________________________________________ Geoserver-devel mailing list Geoserver-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-devel
