Build SegmentCodecs incrementally for consistent codecIDs during indexing
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Key: LUCENE-2985
URL: https://issues.apache.org/jira/browse/LUCENE-2985
Project: Lucene - Java
Issue Type: Improvement
Components: Codecs, Index
Affects Versions: CSF branch, 4.0
Reporter: Simon Willnauer
Assignee: Simon Willnauer
Fix For: CSF branch, 4.0
currently we build the SegementCodecs during flush which is fine as long as no
codec needs to know which fields it should handle. This will change with
DocValues or when we expose StoredFields / TermVectors via Codec (see
LUCENE-2621 or LUCENE-2935). The other downside it that we don't have a
consistent view of which codec belongs to which field during indexing and all
FieldInfo instances are unassigned (set to -1). Instead we should build the
SegmentCodecs incrementally as fields come in so no matter when a codec needs
to be selected to process a document / field we have the right codec ID
assigned.
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