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https://issues.apache.org/jira/browse/LUCENE-4524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Woodward updated LUCENE-4524:
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Attachment: LUCENE-4524.patch
This is a better patch, the old one still had some of the Weight API changes
from LUCENE-2878 in it.
Scorer extends PostingsEnum directly at the moment, which means that there are
lots of Scorer implementations that have to implement empty position, offset
and payload methods. Might be worth having it extend DocsEnum instead.
> Merge DocsEnum and DocsAndPositionsEnum into PostingsEnum
> ---------------------------------------------------------
>
> Key: LUCENE-4524
> URL: https://issues.apache.org/jira/browse/LUCENE-4524
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/codecs, core/index, core/search
> Affects Versions: 4.0
> Reporter: Simon Willnauer
> Fix For: 4.9, Trunk
>
> Attachments: LUCENE-4524.patch, LUCENE-4524.patch, LUCENE-4524.patch,
> LUCENE-4524.patch, LUCENE-4524.patch, LUCENE-4524.patch
>
>
> spinnoff from http://www.gossamer-threads.com/lists/lucene/java-dev/172261
> {noformat}
> hey folks,
> I have spend a hell lot of time on the positions branch to make
> positions and offsets working on all queries if needed. The one thing
> that bugged me the most is the distinction between DocsEnum and
> DocsAndPositionsEnum. Really when you look at it closer DocsEnum is a
> DocsAndFreqsEnum and if we omit Freqs we should return a DocIdSetIter.
> Same is true for
> DocsAndPostionsAndPayloadsAndOffsets*YourFancyFeatureHere*Enum. I
> don't really see the benefits from this. We should rather make the
> interface simple and call it something like PostingsEnum where you
> have to specify flags on the TermsIterator and if we can't provide the
> sufficient enum we throw an exception?
> I just want to bring up the idea here since it might simplify a lot
> for users as well for us when improving our positions / offset etc.
> support.
> thoughts? Ideas?
> simon
> {noformat}
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