[jira] [Updated] (LUCENE-4998) be more precise about IOContext for reads

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-4998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-4998:
--------------------------------

    Fix Version/s: 4.5.1

> be more precise about IOContext for reads
> -----------------------------------------
>
>                 Key: LUCENE-4998
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4998
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Shikhar Bhushan
>            Assignee: Michael McCandless
>            Priority: Minor
>             Fix For: 4.5.1, 4.6, 5.0
>
>         Attachments: LUCENE-4998.patch
>
>
> Set the context as {{IOContext.READ}} / {{IOContext.READONCE}} where applicable
> ----
> Motivation:
> Custom {{PostingsFormat}} may want to check the context on {{SegmentReadState}} and branch differently, but for this to work properly the context has to be specified correctly up the stack.
> For example, {{DirectPostingsFormat}} only loads postings into memory if the {{context != MERGE}}. However a better condition would be {{context == Context.READ && !context.readOnce}}.



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