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https://issues.apache.org/jira/browse/LUCENE-4425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13463041#comment-13463041
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Adrien Grand commented on LUCENE-4425:
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bq. Maybe we should fix this for 4.0? It really is an API bug...
That would be great. Maybe we should first make sure that everyone agrees that
it is the codec responsability to make the copy.
> Unclear documentation of StoredFieldVisitor.binaryValue
> -------------------------------------------------------
>
> Key: LUCENE-4425
> URL: https://issues.apache.org/jira/browse/LUCENE-4425
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Adrien Grand
> Priority: Minor
> Fix For: 4.1, 5.0
>
>
> When reading the binary value of a stored field, a StoredFieldsReader calls
> StoredFieldVisitor.binaryValue(arr, offset, length).
> Documentation currently doesn't state whether the byte[] can be reused
> outside of the scope of {{StoredFieldVisitor.binaryValue}} but
> {{DocumentStoredFieldVisitor}} assumes (as of r1389812) that it can.
> So {{DocumentStoredFieldVisitor}} would break with a custom
> {{StoredFieldsFormat}} that would call {{StoredFieldVisitor.binaryValue}}
> with a slice of a reusable buffer.
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