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https://issues.apache.org/jira/browse/SOLR-2093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904140#action_12904140
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Kuri Masta commented on SOLR-2093:
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With a/b/c as input
You'll notice that I start searching from the end of the line.
1(a$). match everything to the left until: /
2(/). match /
3($1 = b). Repeat the previous but capture the match
4.(/) match /
I wouldn't even know how to write regexp so it will concatenate two seperate
matches, divided by '/', into one var.
Before I posted I've tried two regexp tools besides Solr.
I would like you to try again. But please keep in mind that I don't need this
fix, I just found a bug and am reporting it.
> regular expression in PatternReplaceFilter can handle: /([^/]*)
> ---------------------------------------------------------------
>
> Key: SOLR-2093
> URL: https://issues.apache.org/jira/browse/SOLR-2093
> Project: Solr
> Issue Type: Bug
> Components: Schema and Analysis
> Affects Versions: 1.4
> Environment: debian,JRE1.6,solr1.4
> Reporter: Kuri Masta
> Priority: Minor
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Using PatternReplaceFilter i want to extract a certain word out of the URI.
> Although I now understand that I should handle this outside of Solr, the fact
> remains that Solr does not adequately handle regular expressions.
> Viewing the source code, I don't see any problems since it uses the java
> library.
> The problem:
> <analyzer type="index">
> <tokenizer class="solr.WhitespaceTokenizerFactory"/>
> <filter class="solr.PatternReplaceFilterFactory"
> pattern="/([^/]*)/[^/]*$" 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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