Sampler that will stop after n features

@witos

That would require the outcome of your inside filter at nth feature to be looped back to stop the reader. I don't think that's possible with a standard reader, afaik.

1. I think you could create such a thing if you use a feature reader (or a workspacerunner) and have it read 1 feature at a time. You would have to test when the nth feature after inside poly check has been reached, as long as it is not reached you call the featurereader. (or workspacerunner).I presume this would be a (very) slow process, for you may need a lot of calls.

2 - If you got your data in a spatial database, you can do this through SQL.

3 - Depending on the datasource type, you might do some pre-spatialfiltering. Use a feature reader on the dataset and and as initiator your (aggregated if you got more then 1 filter) . Use the SpatialFilter option, select appropriate filter. You can then set you n-sample on the result. Not exactly what you are asking but it will reduce amount read.