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https://issues.apache.org/jira/browse/SOLR-1516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12782489#action_12782489
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Chris A. Mattmann commented on SOLR-1516:
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Thanks, Noble!
> DocumentList and Document QueryResponseWriter
> ---------------------------------------------
>
> Key: SOLR-1516
> URL: https://issues.apache.org/jira/browse/SOLR-1516
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.3
> Environment: My MacBook Pro laptop.
> Reporter: Chris A. Mattmann
> Assignee: Noble Paul
> Priority: Minor
> Fix For: 1.5
>
> Attachments: SOLR-1516.Mattmann.101809.patch.txt,
> SOLR-1516.Mattmann.112409.patch.txt, SOLR-1516.patch, SOLR-1516.patch
>
>
> I tried to implement a custom QueryResponseWriter the other day and was
> amazed at the level of unmarshalling and weeding through objects that was
> necessary just to format the output o.a.l.Document list. As a user, I wanted
> to be able to implement either 2 functions:
> * process a document at a time, and format it (for speed/efficiency)
> * process all the documents at once, and format them (in case an aggregate
> calculation is necessary for outputting)
> So, I've decided to contribute 2 simple classes that I think are sufficiently
> generic and reusable. The first is o.a.s.request.DocumentResponseWriter -- it
> handles the first bullet above. The second is
> o.a.s.request.DocumentListResponseWriter. Both are abstract base classes and
> require the user to implement either an #emitDoc function (in the case of
> bullet 1), or an #emitDocList function (in the case of bullet 2). Both
> classes provide an #emitHeader and #emitFooter function set that handles
> formatting and output before the Document list is processed.
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