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don't let MultiFieldQueryParser create empty clauses for stopwords 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@294924 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Daniel Naber 2005-10-04 21:30:37 +00:00
parent 45a706eb30
commit ae706faf12
2 changed files with 28 additions and 0 deletions
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2
src/java/org/apache/lucene/queryParser/MultiFieldQueryParser.java
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@ -76,6 +76,8 @@ public class MultiFieldQueryParser extends QueryParser
clauses.add(new BooleanClause(q, BooleanClause.Occur.SHOULD)); clauses.add(new BooleanClause(q, BooleanClause.Occur.SHOULD));
} }
} }
if (clauses.size() == 0) // happens for stopwords
return null;
return getBooleanQuery(clauses, true); return getBooleanQuery(clauses, true);
} }
return super.getFieldQuery(field, queryText); return super.getFieldQuery(field, queryText);

26
src/test/org/apache/lucene/queryParser/TestMultiFieldQueryParser.java
View File

@ -24,7 +24,14 @@ import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Token; import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream; import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query; import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
/** /**
* Tests QueryParser. * Tests QueryParser.
@ -181,6 +188,25 @@ public class TestMultiFieldQueryParser extends TestCase {
assertEquals("f1:[a TO c] f2:[a TO c] f3:[a TO c]", q.toString()); assertEquals("f1:[a TO c] f2:[a TO c] f3:[a TO c]", q.toString());
} }
public void testStopWordSearching() throws Exception {
Analyzer analyzer = new StandardAnalyzer();
Directory ramDir = new RAMDirectory();
IndexWriter iw = new IndexWriter(ramDir, analyzer, true);
Document doc = new Document();
doc.add(new Field("body", "blah the footest blah", Field.Store.NO, Field.Index.TOKENIZED));
iw.addDocument(doc);
iw.close();
MultiFieldQueryParser mfqp =
new MultiFieldQueryParser(new String[] {"body"}, analyzer);
mfqp.setDefaultOperator(QueryParser.Operator.AND);
Query q = mfqp.parse("the footest");
IndexSearcher is = new IndexSearcher(ramDir);
Hits hits = is.search(q);
assertEquals(1, hits.length());
is.close();
}
/** /**
* Return empty tokens for field "f1". * Return empty tokens for field "f1".
*/ */