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https://issues.apache.org/jira/browse/SOLR-1516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12778766#action_12778766
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Noble Paul commented on SOLR-1516:
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Most of the custom writers are less bothered about sections other than the
DocList. The hard part is in reading the stored fields from lucene Documents
depending on what fields are requested by the user. If the API allows to fetch
the data as an Iterator<SolrDocument> w/o bothering about the low level Lucene
details that would be ideal.
> 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
>
>
> 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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