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https://issues.apache.org/jira/browse/LUCENE-8747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16900840#comment-16900840
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Alan Woodward commented on LUCENE-8747:
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I spoke to [~jimczi] offline, and we agreed that adding a specific use-case to
this might make sense, so I've updated the patch to include a new NamedMatches
class, with a couple of static helper functions. This class makes it possible
to associate names with queries; if those queries are then combined into a
larger, complex query, it is easy to retrieve the names of any queries that
matched a particular document.
> Allow access to submatches from Matches instances
> -------------------------------------------------
>
> Key: LUCENE-8747
> URL: https://issues.apache.org/jira/browse/LUCENE-8747
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Major
> Attachments: LUCENE-8747.patch, LUCENE-8747.patch, LUCENE-8747.patch,
> LUCENE-8747.patch
>
>
> A Matches object currently allows access to all matching terms from a query,
> but the structure of the matching query is flattened out, so if you want to
> find which subqueries have matched you need to iterate over all matches,
> collecting queries as you go. It should be easier to get this information
> from the parent Matches object.
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