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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2064) Highlighter should support all MultiFieldQuery subclasses without casts
Date Fri, 13 Nov 2009 21:56:39 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12777684#action_12777684
] 

Robert Muir commented on LUCENE-2064:
-------------------------------------

Uwe, I agree, I think you should set to 3.0

I think there was some discussion on the list about allow a getField() or something for multitermqueries,
but in the meantime, this patch will work for now, and its internal to the highlighter so
its not like it would have to be deprecated later.


> Highlighter should support all MultiFieldQuery subclasses without casts
> -----------------------------------------------------------------------
>
>                 Key: LUCENE-2064
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2064
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/highlighter
>    Affects Versions: 2.9.1
>            Reporter: Simon Willnauer
>            Assignee: Simon Willnauer
>             Fix For: 3.1
>
>         Attachments: LUCENE-2064.txt
>
>
> In order to support MultiTermQuery subclasses the Highlighter component applies instanceof
checks for concrete classes from the lucene core. This prevents classes like RegexQuery in
contrib from being supported. Introducing dependencies on other contribs is not feasible just
for being supported by the highlighter.
> While the instanceof checks and subsequent casts might hopefully go somehow away  in
the future but for supporting more multterm queries I have a alternative approach using a
fake IndexReader that uses a RewriteMethod to force the MTQ to pass the field name to the
given reader without doing any real work. It is easier to explain once you see the patch -
I will upload shortly.

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