Shikhar Bhushan created LUCENE-4998:
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Summary: 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
Priority: Minor
Fix For: 5.0, 4.4
Attachments: LUCENE-4998.patch
Set the context as {{IOContext.READ}} / {{IOContext.READONCE}} where applicable
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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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