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Date: Tue, 17 Nov 2009 10:16:39 +0000 (UTC)
From: "Noble Paul (JIRA)" <jira@apache.org>
To: solr-dev@lucene.apache.org
Subject: [jira] Updated: (SOLR-1516) DocumentList and Document
 QueryResponseWriter
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     [ https://issues.apache.org/jira/browse/SOLR-1516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Noble Paul updated SOLR-1516:
-----------------------------

    Attachment: SOLR-1516.patch

idea as a patch (untested)

> 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.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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