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From "Woody Anderson (JIRA)" <j...@apache.org>
Subject [jira] Created: (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 Sat, 17 Jul 2010 19:34:50 GMT
TopDocsCollector should be abstract super class that is the real "TopDocsCollector" contract,
a subclass should implement the priority-queue logic. e.g. PQTopDocsCollector
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                 Key: LUCENE-2542
                 URL: https://issues.apache.org/jira/browse/LUCENE-2542
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Search
    Affects Versions: 3.0.2
            Reporter: Woody Anderson
             Fix For: 4.0, 3.0.2


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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