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From "Uwe Schindler (JIRA)" <>
Subject [jira] Commented: (LUCENE-1935) Generify PriorityQueue
Date Thu, 01 Oct 2009 22:52:23 GMT


Uwe Schindler commented on LUCENE-1935:

I think it could be rewritten and the missing functionality with the funny name "topSkipToAndAdjustElsePop"
added somewhere. The simpliest would be a subclass:

public class ScorerDocQueue extends PriorityQueue<HeapedScorerDoc> {...}

I do not know how big the perf impact would be (if there is one). As mentioned before, there
is a small oerhead, because the overriden abstract method lessThan(HeapedScorerDoc, HeapedScorerDoc)
would be wrapped by javac as lessThan(Object, Object) - a small added cost (do not know how
big or jvm optimizes away, which I hope)

> Generify PriorityQueue
> ----------------------
>                 Key: LUCENE-1935
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Task
>          Components: Other
>    Affects Versions: 2.9
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>             Fix For: 3.0
>         Attachments: LUCENE-1935.patch
> Priority Queue should use generics like all other Java 5 Collection API classes. This
very simple, but makes code more readable.

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