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From "Shai Erera (JIRA)" <>
Subject [jira] Updated: (LUCENE-1356) Allow easy extensions of TopDocCollector
Date Mon, 18 Aug 2008 08:09:44 GMT


Shai Erera updated LUCENE-1356:

    Attachment: 1356-2.patch

Marked the constructor as deprecated, created another one (protected) which accepts PQ only
and modified TopFieldDocCollector to use the new c'tor instead of the deprecated one.
Also added javadoc.

> Allow easy extensions of TopDocCollector
> ----------------------------------------
>                 Key: LUCENE-1356
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Shai Erera
>            Assignee: Doron Cohen
>            Priority: Minor
>             Fix For: 2.3.3
>         Attachments: 1356-2.patch, 1356.patch
> TopDocCollector's members and constructor are declared either private or package visible.
It makes it hard to extend it as if you want to extend it you can reuse its *hq* and *totatlHits*
members, but need to define your own. It also forces you to override getTotalHits() and topDocs().
> By changing its members and constructor (the one that accepts a PQ) to protected, we
allow users to extend it in order to get a different view of 'top docs' (like TopFieldCollector
does), but still enjoy its getTotalHits() and topDocs() method implementations.

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