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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1290) Deprecate Hits
Date Wed, 21 May 2008 05:30:56 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598557#action_12598557
] 

Uwe Schindler commented on LUCENE-1290:
---------------------------------------

The HitCollerctor and Iterator approach only supports *forward* displaying of results. In
a typical Google-like Website, where the user can just jump to page X, display some results
and can jump back to page Y and display results from there too, Hits works really good. The
problem with Hits is, that it returns and caches whole "Documents". If it could just return
ScoreDocs and would implement the Java Collection API "List" Interface (using AbstractList),
that would be a good replacement for "navigateable" result sets.

> Deprecate Hits
> --------------
>
>                 Key: LUCENE-1290
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1290
>             Project: Lucene - Java
>          Issue Type: Task
>          Components: Search
>            Reporter: Michael Busch
>            Assignee: Michael Busch
>            Priority: Minor
>             Fix For: 2.4
>
>         Attachments: lucene-1290.patch, lucene-1290.patch
>
>
> The Hits class has several drawbacks as pointed out in LUCENE-954.
> The other search APIs that use TopDocCollector and TopDocs should be used instead.
> This patch:
> - deprecates org/apache/lucene/search/Hits, Hit, and HitIterator, as well as
>   the Searcher.search( * ) methods which return a Hits Object.
> - removes all references to Hits from the core and uses TopDocs and ScoreDoc
>   instead
> - Changes the demo SearchFiles: adds the two modes 'paging search' and 'streaming search',
>   each of which demonstrating a different way of using the search APIs. The former
>   uses TopDocs and a TopDocCollector, the latter a custom HitCollector implementation.
> - Updates the online tutorial that descibes the demo.
> All tests pass.

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