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Date: Mon, 14 Dec 2009 07:49:18 +0000 (UTC)
From: "Shalin Shekhar Mangar (JIRA)" <jira@apache.org>
To: solr-dev@lucene.apache.org
Subject: [jira] Commented: (SOLR-1653) add PatternReplaceCharFilter
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    [ https://issues.apache.org/jira/browse/SOLR-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790026#action_12790026 ] 

Shalin Shekhar Mangar commented on SOLR-1653:
---------------------------------------------

Koji, even after reading through the test, I do not understand how to use it. Are the characters in curly braces, written down for non-groups only? What if I want to remove one particular group?

It is always good to write a use-case and an example in the issue description itself.

> add PatternReplaceCharFilter
> ----------------------------
>
>                 Key: SOLR-1653
>                 URL: https://issues.apache.org/jira/browse/SOLR-1653
>             Project: Solr
>          Issue Type: New Feature
>          Components: Schema and Analysis
>    Affects Versions: 1.4
>            Reporter: Koji Sekiguchi
>            Assignee: Koji Sekiguchi
>            Priority: Minor
>             Fix For: 1.5
>
>         Attachments: SOLR-1653.patch
>
>
> Add a new CharFilter that uses a regular expression for the target of replace string in char stream.
> Usage:
> {code:title=schema.xml}
> <fieldType name="textCharNorm" class="solr.TextField" positionIncrementGap="100" >
>   <analyzer>
>     <charFilter class="solr.PatternReplaceCharFilterFactory"
>                 groupedPattern="([nN][oO]\.)\s*(\d+)"
>                 replaceGroups="1,2" blockDelimiters=":;"/>
>     <charFilter class="solr.MappingCharFilterFactory" mapping="mapping-ISOLatin1Accent.txt"/>
>     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
>   </analyzer>
> </fieldType>
> {code}

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