David Smiley created LUCENE-5746:
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Summary: Add DecimalRangePrefixTree
Key: LUCENE-5746
URL: https://issues.apache.org/jira/browse/LUCENE-5746
Project: Lucene - Core
Issue Type: New Feature
Components: modules/spatial
Reporter: David Smiley
The abstract class NumberRangePrefixTree only has a DateRangePrefixTree
concrete implementation. Obviously an integer/long based subclass would be
great too, and wouldn't be as difficult as Dates except for its extra
configurability.
I imagine a user being able to specify the smallest value and the largest value
(or pre-fill both based on full ranges of Integer or Long or Float or Double).
When Float or Double is used, it would internally use the int or long
representation (e.g. Double.doubleToLongBits). It should have the option of
working in fixed-point decimal, or floating-point. Fixed-point is advantageous
assuming the ranges (indexed and/or query) are expected to use multiples of 10
(for example) because then you could configure the cells-per-level to be 10.
The existing abstract "NumberRangePrefixTree" should perhaps be renamed to
"AbstractRangePrefixTree" thus freeing up its existing name for the feature
called out on this issue.
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