[jira] Commented: (LUCENE-1317) Add InstantiatedIndexWriter.addIndexes(IndexReader[] readers)

["Jason Rutherglen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-1317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608486#action_12608486 ] 

Jason Rutherglen commented on LUCENE-1317:
------------------------------------------

Looks like a modified version of addDocument will work, that operates on TokenStreams and Documents manufactured from the IndexReaders.  Can use the org.apache.lucene.search.highlight.TokenSources for the TokenStreams.  

> Add InstantiatedIndexWriter.addIndexes(IndexReader[] readers)
> -------------------------------------------------------------
>
>                 Key: LUCENE-1317
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1317
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/*
>            Reporter: Jason Rutherglen
>
> Enable InstantiatedIndexWriter to have IndexReaders passed in like IndexWriter and merged into the index.  
> Karl mentioned:
> bq: It's doable. The simplest solution I can think of is to reconstruct all the documents in one single enumeration of the source index and then add them to the writer. I'm however not certain this is the best way nor if InstantiatedIndexWriter is the place for the code.
> How would the documents be reconstructed without creating a lot of overhead?  It seems like InstantiatedIndexWriter is the right place, given it is presumably more efficient to recreate all the IndexReaders and then commit?  

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