Tnx Steve,
this solved the minor problem (finding two documents).
The maior problem (and customers bugreport) was not to find "(test". Now
solved: Indeed I should not use QueryParser.escape(...) by building a
PrefixQuery.
kind regards
-------- Original-Nachricht --------
> Datum: Wed, 14 Apr 2010 08:24:38 -0400
> Von: Steven A Rowe <sar...@syr.edu>
> An: "java-user@lucene.apache.org" <java-user@lucene.apache.org>
> Betreff: RE: PrefixQuery and special characters
> Hi Franz,
>
> The likely problem is that you're using an index-time analyzer that strips
> out the parentheses. StandardAnalyzer, for example, does this;
> WhitespaceAnalyzer does not.
>
> Remember that hits are the result of matches between index-analyzed terms
> and query-analyzed terms. Except in the case of synonyms, most people will
> want their index and query analyzers to be the same.
>
> Steve
>
> ________________________________________
> From: Franz Roth [franzr...@gmx.de]
> Sent: Wednesday, April 14, 2010 7:42 AM
> To: java-user@lucene.apache.org
> Subject: PrefixQuery and special characters
>
> Hi all,
>
> say I have an Index with one field named "category". There are two
> documents one with value "(testvalue)" and one with value "test value".
> Now somone search with "test". My Searchenine uses the
> org.apache.lucene.search.PrefixQuery and finds 2 documents. Maybe he
> estimated only one hit;
> owever: if he searches for "(test" and the Searchengine uses the
> QueryParser.escape to clean the request and takes that PrefixQuery to search
> nothing
> results.
>
> How can I search for the document "(testvalue)" and only this one?
>
> Thx!
>
>
>
>
>
> package foo.bar;
>
> import java.io.IOException;
>
> import junit.framework.TestCase;
>
> import org.apache.log4j.Logger;
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.document.Document;
> import org.apache.lucene.document.Field;
> import org.apache.lucene.index.CorruptIndexException;
> import org.apache.lucene.index.IndexWriter;
> import org.apache.lucene.index.Term;
> import org.apache.lucene.queryParser.QueryParser;
> import org.apache.lucene.search.IndexSearcher;
> import org.apache.lucene.search.PrefixQuery;
> import org.apache.lucene.search.ScoreDoc;
> import org.apache.lucene.store.LockObtainFailedException;
> import org.apache.lucene.store.RAMDirectory;
>
>
>
> public class TestPrefixQuery extends TestCase {
> public void testEscapeAndPrefix() throws CorruptIndexException,
> LockObtainFailedException, IOException {
>
> RAMDirectory directory = new RAMDirectory();
> IndexWriter writer = new IndexWriter(directory, new
> StandardAnalyzer(),
> true, IndexWriter.MaxFieldLength.LIMITED);
> Document doc = new Document();
> doc.add(new Field("category", "(testvalue)", Field.Store.YES,
> Field.Index.ANALYZED));
> writer.addDocument(doc);
> doc = new Document();
> doc.add(new Field("category", "test value", Field.Store.YES,
> Field.Index.ANALYZED));
> writer.addDocument(doc);
> writer.close();
>
> String value= "test";
> PrefixQuery query = new PrefixQuery(new Term("category",
> value));
> //log.debug(query.toString());
> IndexSearcher searcher = new IndexSearcher(directory);
> ScoreDoc[] hits = searcher.search(query, null,
> 1000).scoreDocs;
> assertEquals("One for " + value , 2, hits.length); //I want
> one for this?!
>
> value= "(test";
> String escaped = QueryParser.escape(value);
> query = new PrefixQuery(new Term("category", escaped));
> //log.debug(query.toString());
> hits = searcher.search(query, null, 1000).scoreDocs;
> assertEquals("One for " + value + "/" + escaped, 1,
> hits.length); //FAILS!
> }
> }
>
> --
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