Solr: strip punctuation before index

I am having a problem with striping punctuation from the solr index When the punctuation sign follow right after a word then this word is not indexed properly.

For example: if we index "hello, John", the asset won't be found by keyword "hello" while there will be no issue if we re开发者_如何转开发move comma after word "hello".

Is there any FilterFactory that suppose to strip punctuation? Any ideas?

Thanks, Bogdan.

---

You can use the solr.PatternReplaceFilterFactory to strip beginning and trailing punctuation with this:

<filter class="solr.PatternReplaceFilterFactory"
    pattern="^\p{Punct}*(.*?)\p{Punct}*$"
    replacement="$1"/>

And if you wanted to strip all punctuation at the beginning and end, except (for example) the dollar-sign in front of a word, you could use this:

<filter class="solr.PatternReplaceFilterFactory"
    pattern="^[\p{Punct}&&[^$]]*(.*?)\p{Punct}*$"
    replacement="$1"/>

---

This is done with the WordDelimiterFilterFactory. Set generateWordParts=1.

There is also the PatternTokenizerFactory that could be used, but I have never tried it.

---

Use PatternReplaceFilterFactory

<!-- remove punctuation -->
    <filter class="solr.PatternReplaceFilterFactory" pattern="^(\p{Punct}*)(.*?)(\p{Punct}*)$" replacement="$2"/>
    <filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.StandardFilterFactory"/>
    <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
  </analyzer>

...