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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (LUCENE-2542) TopDocsCollector should be abstract super class that is the real "TopDocsCollector" contract, a subclass should implement the priority-queue logic. e.g. PQTopDocsCollector
Date Wed, 21 Jul 2010 19:00:59 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-2542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yonik Seeley resolved LUCENE-2542.
----------------------------------

    Resolution: Fixed

committed.

> TopDocsCollector should be abstract super class that is the real "TopDocsCollector" contract,
a subclass should implement the priority-queue logic. e.g. PQTopDocsCollector
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2542
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2542
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Woody Anderson
>             Fix For: 3.1, 4.0
>
>         Attachments: LUCENE-2542.patch, LUCENE-2542.patch, LUCENE-2542.patch, LUCENE_3.0.2-2542.patch
>
>
> TopDocsCollector is both an abstract interface for producing TopDocs as well as a PriorityQueue
based implementation.
> Not all Collectors that could produce TopDocs must use a PriorityQueue, and it would
be advantageous to allow the TopDocsCollector to be an "interface" type abstract class, with
a PQTopDocsCollector sub-class.
> While doing this, it'd be good to clean up the generics uses in these classes. As it's
odd to create a TopFieldCollector and have to case the TopDocs object, when this can be fixed
with generics.

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