Zied Hamdi created LUCENE-4247:
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Summary: QueryParser doesn't call Analyzer
Key: LUCENE-4247
URL: https://issues.apache.org/jira/browse/LUCENE-4247
Project: Lucene - Core
Issue Type: Bug
Components: core/queryparser
Affects Versions: 3.6
Reporter: Zied Hamdi
I'm trying to escape czech characters thorough the ASCIIFoldingFilter this
works fine in indexing since I can retrieve the non-diacritic version of the
content I indexed. But trying to retrieve with diacritics returns always 0
results
In debug mode I can clearly see that the Analyzer wasn't called (in addition to
that I've put a breakpoint in my analyser to check if it is not called later,
and it never passes in)
searchText = "příLIš*";
Analyzer analyzer = (Analyzer) factory.getBean("analyzer");
Query q = new QueryParser((Version) factory.getBean("version"),
DestinationPlaceProperties.NAME, analyzer).parse(searchText);
The query q has these values in debug:
prefix Term (id=90)
field "name" (id=100)
text "příliš" (id=101)
--- more details ----
q PrefixQuery (id=65)
boost 1.0
numberOfTerms 0
prefix Term (id=90)
rewriteMethod MultiTermQuery$2 (id=92)
---------------------
My analyser is quite simple: I put its code just for reference
public class DestinationAnalyser extends Analyzer {
/**
*
*/
private final Version luceneVersion;
public DestinationAnalyser(Version lucene_version) {
super();
this.luceneVersion = lucene_version;
}
/*
* (non-Javadoc)
*
* @see
org.apache.lucene.analysis.Analyzer#tokenStream(java.lang.String,
* java.io.Reader)
*/
@Override
public TokenStream tokenStream(String fieldName, Reader reader) {
TokenStream result = new StandardTokenizer(luceneVersion,
reader);
result = new StandardFilter(luceneVersion, result);
result = new LowerCaseFilter(luceneVersion, result);
result = new ASCIIFoldingFilter(result);
return result;
}
}
--------- WORKAROUND ---------
To avoid the problem, I'm actually using this method to transform the search
text
/**
* Uses {@link ASCIIFoldingFilter} to transform diacritical text to its
ascii
* counterpart
*
* @param text
* to transform
* @return ascii text
*/
public static String foldToASCII(String text) {
int length = text.length();
char[] toReturn = new char[length];
ASCIIFoldingFilter.foldToASCII(text.toCharArray(), 0, toReturn,
0, length);
return new String(toReturn);
}
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