Solr diffrence between analysis results and indexed values - solr

Question

I want to use transformations by replacements on my extracted/indexed values of few copied fields with Solr.
In my schema.xml, I have the source_file field who contains a value. I copy this value into the collection field. Then I use PatternReplaceCharFilterFactory (regex / replacement) to modify this value as I want :
<field name="source_file" type="string" indexed="true" stored="true" multiValued="false" docValues="false"/>
<field name="collection" type="collectionType" indexed="true" stored="true" multiValued="false"/>
<copyField source="source_file" dest="collection"/>
<fieldType name="collectionType" class="solr.TextField" stored="true" indexed="true">
<analyzer type="index">
<charFilter class="solr.PatternReplaceCharFilterFactory" pattern="A" replacement="B"/>
<tokenizer class="solr.KeywordTokenizerFactory"/>
</analyzer>
<analyzer type="query">
<charFilter class="solr.PatternReplaceCharFilterFactory" pattern="A" replacement="B"/>
<tokenizer class="solr.KeywordTokenizerFactory"/>
</analyzer>
</fieldType>
EDIT 1
In Solr webapp, when I use the Analysis interface, I see that the pattern replacement works for Index & Query forms.
My source_file value is modified by the setted value. Which means that the definition of my schema seems correct. A becomes B.
But, when I use a Solr Query, I see that the pattern replacement not works. No change is taken into account (I always have the value A).
http://xxx:898x/solr/discovery_collection/select?fl=collection&indent=on&q=*:*&wt=json
The result shows that the value of collection field is not modify by the replacement pattern when I use a query.
I've done all my configurations into schema.xml. Nothing into solrconfig.xml.
Would I have forgotten a configuration (into solrconfig.xml ?) to force the indexing of modified fields?
EDIT 2
My request handlers in solrconf.xml :
<requestHandler name="/select" class="solr.SearchHandler">
<lst name="defaults">
<str name="echoParams">explicit</str>
<int name="rows">10</int>
<str name="df">text</str>
<str name="defType">edismax</str>
<str name="timeAllowed">30000</str>
<bool name="preferLocalShards">false</bool>
</lst>
</requestHandler>
<requestHandler name="/query" class="solr.SearchHandler">
<lst name="defaults">
<str name="echoParams">explicit</str>
<str name="wt">json</str>
<str name="indent">true</str>
<str name="df">text</str>
<int name="rows">10</int>
<str name="defType">edismax</str>
<str name="timeAllowed">30000</str>
</lst>
</requestHandler>
<requestHandler name="/update/extract"
startup="lazy"
class="solr.extraction.ExtractingRequestHandler" >
<lst name="defaults">
<str name="lowernames">true</str>
<str name="uprefix">ignored_</str>
<!-- capture link hrefs but ignore div attributes -->
<str name="captureAttr">true</str>
<str name="fmap.a">links</str>
<str name="fmap.div">ignored_</str>
</lst>
</requestHandler>
EDIT 3
I've just seen that it works. But in fact the value "B" is stored/indexed and I can search it by query, but the value "B" is not displayed in the json result of the query (it displays the value "A").
Do have I to use custuom updateRequestProcessorChain and requestHandler in solrconfig.xml? And add a custom class in lib/ to do the pattern transformation?