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https://issues.apache.org/jira/browse/LUCENE-5063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-5063:
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Attachment: LUCENE-5063.patch
Here is a patch which makes GrowableWriter able to store negative values and
makes FieldCache.DEFAULT.get(Ints|Longs) use it. In order to not make field
cache loading too slow, the GrowableWriters are created with an acceptable
overhead ratio of 50% so that they can grow the number of bits per value
quickly in order not to perform too much resizing.
> Allow GrowableWriter to store negative values
> ---------------------------------------------
>
> Key: LUCENE-5063
> URL: https://issues.apache.org/jira/browse/LUCENE-5063
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Trivial
> Fix For: 4.4
>
> Attachments: LUCENE-5063.patch
>
>
> For some use-cases, it would be convenient to be able to store negative
> values in a GrowableWriter, for example to use it in FieldCache: The first
> term is the minimum value and one could use a GrowableWriter to store deltas
> between this minimum value and the current value. (The need for negative
> values comes from the fact that maxValue - minValue might be larger than
> Long.MAX_VALUE.)
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