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https://issues.apache.org/jira/browse/LUCENE-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910589#action_12910589
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Simon Willnauer commented on LUCENE-2649:
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bq. Also, if I have to list out all the fields I'm going to use, that's another
big step backwards.
I don't think that this is needed at all neither would it be a step backwards -
not even near to that. But since we aren't on an issue about FieldType lets
just drop it...
bq. A factory would be a pretty straightforward way to increase the power, by
allowing users to populate the entry through any mechanism, and optionally do
extra calculations when the entry is populated (think statistics,
sum-of-squares, etc).
Whatever you call it (using Factory is fine) but isn't that what you mentioned
to be insufficient? I mean this is something you would pass to a
FieldCache.getXXX, right?
> FieldCache should include a BitSet for matching docs
> ----------------------------------------------------
>
> Key: LUCENE-2649
> URL: https://issues.apache.org/jira/browse/LUCENE-2649
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Ryan McKinley
> Fix For: 4.0
>
> Attachments: LUCENE-2649-FieldCacheWithBitSet.patch,
> LUCENE-2649-FieldCacheWithBitSet.patch
>
>
> The FieldCache returns an array representing the values for each doc.
> However there is no way to know if the doc actually has a value.
> This should be changed to return an object representing the values *and* a
> BitSet for all valid docs.
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