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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
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Shalin Shekhar Mangar commented on SOLR-1653:
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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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