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https://issues.apache.org/jira/browse/LUCENE-762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12466887
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Grant Ingersoll commented on LUCENE-762:
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Hmm, I forgot to mention that FieldInfo is package local. This complicates
things a little bit, but I could expand the proposed method to pass in the
appropriate FieldInfo properties, which seems to be name and omitNorms, but
that doesn't seem quite right b/c we may want other FieldInfo later. I suppose
I could copy the info into a holding structure, but that seems like a waste.
Another option is to make FieldInfo public and label it as Expert Use/Internal
Use only. It exposes some of the implementation details, but not all and
wouldn't be meaningful to most people, I guess.
Any strong opinions on making FieldInfo public?
> [PATCH] Efficiently retrieve sizes of field values
> --------------------------------------------------
>
> Key: LUCENE-762
> URL: https://issues.apache.org/jira/browse/LUCENE-762
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Store
> Affects Versions: 2.1
> Reporter: Chuck Williams
> Assigned To: Grant Ingersoll
> Priority: Minor
> Attachments: SizeFieldSelector.patch
>
>
> Sometimes an application would like to know how large a document is before
> retrieving it. This can be important for memory management or choosing
> between algorithms, especially in cases where documents might be very large.
> This patch extends the existing FieldSelector mechanism with two new
> FieldSelectorResults: SIZE and SIZE_AND_BREAK. SIZE creates fields on the
> retrieved document that store field sizes instead of actual values.
> SIZE_AND_BREAK is especially efficient if one field comprises the bulk of the
> document size (e.g., the body field) and can thus be used as a reasonable
> size approximation.
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