Uwe Schindler wrote:
I forgot: The format of numeric fields is also not plain text, because of
this a simple TermQuery as generated by your query parser will not work,
too.
If you want to hit numeric values without a NumericRangeQuery with lower and
upper bound equal, you have to use NumericUtils to translate the term text,
e.g. new TermQuery(new Term("field",
NumericUtils.intToPrefixCoded(value,precstep)))
If you want support for this in QueryParser, you have to override
QueryParser.newTermQuery as explained before for newRangeQuery. By the way,
Solr does this in exactly that way.
Uwe
Ok, Im trying my best here but still cannot get range or single term
query searching to work.
package org.musicbrainz.search.servlet;
import junit.framework.TestCase;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.NumericField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.*;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.NumericUtils;
import org.musicbrainz.search.index.TrackAnalyzer;
public class NumericFieldTest extends TestCase {
public void testNumericFields() throws Exception {
Analyzer analyzer = new TrackAnalyzer();
RAMDirectory dir = new RAMDirectory();
IndexWriter writer = new IndexWriter(dir, analyzer, true,
IndexWriter.MaxFieldLength.LIMITED);
Document doc = new Document();
NumericField nf = new NumericField("dur");
nf.setIntValue(123);
writer.addDocument(doc);
writer.close();
IndexSearcher searcher = new IndexSearcher(dir,true);
{
Query q = new
MusicbrainzQueryParser("dur",analyzer).parse("[12 TO 124]");
assertEquals(1, searcher.search(q,10).totalHits);
q = new MusicbrainzQueryParser("dur",analyzer).parse("123");
assertEquals(1, searcher.search(q,10).totalHits);
}
}
static class MusicbrainzQueryParser extends QueryParser {
public MusicbrainzQueryParser(String field, Analyzer a) {
super(field, a);
System.out.println("init parser");
}
public Query newRangeQuery(String field,
String part1,
String part2,
boolean inclusive)
{
System.out.println("RangeQuery");
TermRangeQuery query = (TermRangeQuery)
super.newRangeQuery(field, part1, part2,
inclusive);
if ("dur".equals(field)) {
System.out.println("durRangeQuery");
return NumericRangeQuery.newIntRange(
"dur",
Integer.parseInt(query.getLowerTerm()),
Integer.parseInt(query.getUpperTerm()),
query.includesLower(),
query.includesUpper());
} else {
return query;
}
}
protected Query newTermQuery(Term term)
{
System.out.println("newTermQuery");
if(term.field().equals("dur")) {
System.out.println("dur,newTermQuery");
TermQuery tq = new TermQuery(new Term("field",
NumericUtils.intToPrefixCoded(Integer.parseInt(term.text()),NumericUtils.PRECISION_STEP_DEFAULT)));
return tq;
}
else {
return super.newTermQuery(term);
}
}
}
}
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