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https://issues.apache.org/jira/browse/LUCENE-2636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907991#action_12907991
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Yonik Seeley commented on LUCENE-2636:
--------------------------------------
Heh - Solr added a MultiCollector a few weeks ago (and it does exactly the same
thing).
As far as naming, I agree this isn't a chaining collector, but a branching
collector (and MultiCollector is a better name).
Solr's version also has this, which simplifies building a list of collectors
and then creating a single collector:
{code}
public static Collector wrap(List<? extends Collector> collectors) {
return collectors.size() == 1 ? collectors.get(0) : new
MultiCollector(collectors);
}
{code}
We should consolidate these two versions of course.
> Create ChainingCollector
> ------------------------
>
> Key: LUCENE-2636
> URL: https://issues.apache.org/jira/browse/LUCENE-2636
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Search
> Reporter: Shai Erera
> Assignee: Shai Erera
> Priority: Minor
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2636.patch
>
>
> ChainingCollector allows chaining a bunch of Collectors, w/o them needing to
> know or care about each other, and be passed into Lucene's search API, since
> it is a Collector on its own. It is a convenient, yet useful, class. Will
> post a patch w/ it shortly.
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