Several Codecs use the same files - PerFieldCodecWrapper can not hold two codec
using the same files
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Key: LUCENE-2741
URL: https://issues.apache.org/jira/browse/LUCENE-2741
Project: Lucene - Java
Issue Type: Bug
Components: Index
Affects Versions: 4.0
Reporter: Simon Willnauer
Fix For: 4.0
Currently we have a rather simple file naming scheme which prevents us from
using more than one codec in a segment that relies on the same file. For
instance pulsing and standard codec can not be used together since they both
need the .frq .tii .tis etc. To make this work we either need to write distinct
per codec files or set a per field / codec file ID. While the first solution
seems to be quiet verbose the second one seems to be more flexible too.
One possibility to do that would be to assign a unique id to each
SegmentsWriteState when opening the FieldsConsumer and write the IDs into the
segments file to eventually load it once the segment is opened. Otherwise our
PerFieldCodec feature will not be really flexible nor useful though.
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