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https://issues.apache.org/jira/browse/LUCENE-4794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved LUCENE-4794.
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Resolution: Fixed
> Refactor Spatial RecursivePrefixTreeFilter algorithm for extension
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>
> Key: LUCENE-4794
> URL: https://issues.apache.org/jira/browse/LUCENE-4794
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/spatial
> Reporter: David Smiley
> Assignee: David Smiley
> Fix For: 4.2, 5.0
>
> Attachments:
> LUCENE-4794_Spatial_PrefixTree_traversal_abstraction.patch
>
>
> In the process of implementing algorithms on the SpatialPrefixTree indexed
> field like "Within" or some variations of Intersects that say collect the
> distance as side-effect, I find that I need near-copies of the code in
> RecursivePrefixTreeFilter. RPTF is pretty intense with lots of
> optimizations. So I refactored out the algorithm such that it makes
> implementing new algorithms much easier yet benefits from the logic in there.
> Patch to follow...
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