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From "Paul Elschot (JIRA)" <>
Subject [jira] [Commented] (LUCENE-6226) Add interval iterators to Scorer
Date Fri, 20 Mar 2015 16:31:39 GMT


Paul Elschot commented on LUCENE-6226:

This issue is about adding interval/span iterators to scorer, and I think some of the scoring
for intervals is better left to the intervals/spans themselves, see my previous posts.
I agree that a separate issue for that is better.

I'd like to have the possibity to somehow converge the code at LUCENE-6308 to the code here.
This is actually also a separate issue, but anyway.
At LUCENE-6308 an interval/spans iterator (SpansEnum) is an extension of DocIdSetIterator,
mostly because that allows a move away from Spans that is not too large.
The IntervalIterator here is an interface that does not have methods directly related to doc
id set iteration.
So the question is: is there an implementation of the IntervalIterator here that is used without
the context of a DocIdSetIterator ?

> Add interval iterators to Scorer
> --------------------------------
>                 Key: LUCENE-6226
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>             Fix For: Trunk, 5.1
>         Attachments: LUCENE-6226.patch, LUCENE-6226.patch, LUCENE-6226.patch, LUCENE-6226.patch,
LUCENE-6226.patch, LUCENE-6226.patch, LUCENE-6226.patch
> This change will allow Scorers to expose which positions within a document they have
matched, via a new IntervalIterator interface.  Consumers get the iterator by calling intervals()
on the Scorer, then call reset(docId) whenever the scorer has advanced and nextInterval()
to iterate through positions.  Once all matching intervals on the current document have been
exhausted, nextInterval() returns false.

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