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https://issues.apache.org/jira/browse/SOLR-2093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904086#action_12904086
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Koji Sekiguchi commented on SOLR-2093:
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{quote}
An online JAVA regexp tester (http://www.regexplanet.com/simple/index.html):
* b
{quote}
I tried Java regex tester, but the result of it was same as Solr result, i.e.
"ab". Please look at replaceAll(), not group(1).
> regular expression in PatternReplaceFilter can handle: /([^/]*)
> ---------------------------------------------------------------
>
> Key: SOLR-2093
> URL: https://issues.apache.org/jira/browse/SOLR-2093
> Project: Solr
> Issue Type: Bug
> Components: Schema and Analysis
> Affects Versions: 1.4
> Environment: debian,JRE1.6,solr1.4
> Reporter: Kuri Masta
> Priority: Minor
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Using PatternReplaceFilter i want to extract a certain word out of the URI.
> Although I now understand that I should handle this outside of Solr, the fact
> remains that Solr does not adequately handle regular expressions.
> Viewing the source code, I don't see any problems since it uses the java
> library.
> The problem:
> <analyzer type="index">
> <tokenizer class="solr.WhitespaceTokenizerFactory"/>
> <filter class="solr.PatternReplaceFilterFactory"
> pattern="/([^/]*)/[^/]*$" replacement="$1"
> replace="all" />
> </analyzer>
> Input text:
> - a/b/c
> Expected
> - b
> Result Solr
> - ab
> An online JAVA regexp tester (http://www.regexplanet.com/simple/index.html):
> - b
> So the problem area lies at /([^/])
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