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https://issues.apache.org/jira/browse/LUCENE-8186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16385321#comment-16385321
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Uwe Schindler commented on LUCENE-8186:
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I still don't understand why the Solr TokenizerChain does not do this, although
the reporter claimed that in Solr it works:
https://github.com/apache/lucene-solr/blob/e2521b2a8baabdaf43b92192588f51e042d21e97/solr/core/src/java/org/apache/solr/analysis/TokenizerChain.java
> CustomAnalyzer with a LowerCaseTokenizerFactory fails to normalize multiterms
> ------------------------------------------------------------------------------
>
> Key: LUCENE-8186
> URL: https://issues.apache.org/jira/browse/LUCENE-8186
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Tim Allison
> Priority: Minor
> Attachments: LUCENE-8186.patch
>
>
> While working on SOLR-12034, a unit test that relied on the
> LowerCaseTokenizerFactory failed.
> After some digging, I was able to replicate this at the Lucene level.
> Unit test:
> {noformat}
> @Test
> public void testLCTokenizerFactoryNormalize() throws Exception {
> Analyzer analyzer =
> CustomAnalyzer.builder().withTokenizer(LowerCaseTokenizerFactory.class).build();
> //fails
> assertEquals(new BytesRef("hello"), analyzer.normalize("f", "Hello"));
>
> //now try an integration test with the classic query parser
> QueryParser p = new QueryParser("f", analyzer);
> Query q = p.parse("Hello");
> //passes
> assertEquals(new TermQuery(new Term("f", "hello")), q);
> q = p.parse("Hello*");
> //fails
> assertEquals(new PrefixQuery(new Term("f", "hello")), q);
> q = p.parse("Hel*o");
> //fails
> assertEquals(new WildcardQuery(new Term("f", "hel*o")), q);
> }
> {noformat}
> The problem is that the CustomAnalyzer iterates through the tokenfilters, but
> does not call the tokenizer, which, in the case of the LowerCaseTokenizer,
> does the filtering work.
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