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https://issues.apache.org/jira/browse/LUCENE-2215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850002#action_12850002
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Shai Erera commented on LUCENE-2215:
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bq. since I think it's safe to say most applications implement paging
Let's be careful about the semantics here Grant. Most if not all applications
implement paging indeed, but I believe only FEW actually store user contexts
between searches. PagingCollector relies on the application to store the lowest
ranking doc that was returned previously, which means storing context between
user's searches.
I agree w/ Mike's statement about 99.9% of the searches would never run that
code, which is why I've proposed a delegation/wrapper approach from the
beginning. I also think that we should make some allowances here and there, for
the non-common case, and introduce better software design than specialized
code. A Collector filter approach for some rare (or even less common) cases
seems very reasonable to me.
Also, I think that if we add to TSDC a create method which takes into account
the previously scored lowest doc, it will confuse people. Now they will need to
think "where do I get this low score from?" - but perhaps after I see the code,
it wouldn't be such a bad thing .... just have a feeling TSDC and TFC should be
left on their own, and extreme paging stuff should either be its own
specialized collector, or a wrapper.
> paging collector
> ----------------
>
> Key: LUCENE-2215
> URL: https://issues.apache.org/jira/browse/LUCENE-2215
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Search
> Affects Versions: 2.4, 3.0
> Reporter: Adam Heinz
> Assignee: Grant Ingersoll
> Priority: Minor
> Attachments: IterablePaging.java, LUCENE-2215.patch,
> PagingCollector.java, TestingPagingCollector.java
>
>
> http://issues.apache.org/jira/browse/LUCENE-2127?focusedCommentId=12796898&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12796898
> Somebody assign this to Aaron McCurry and we'll see if we can get enough
> votes on this issue to convince him to upload his patch. :)
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