package org.apache.lucene.search;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.IOException;
import java.util.Random;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.document.*;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.store.Directory;
/** Document boost unit test.
*
*
* @version $Revision: 988206 $
*/
public class TestDocBoost extends LuceneTestCase {
public TestDocBoost(String name) {
super(name);
}
public void testDocBoost() throws Exception {
Random random = newRandom();
Directory store = newDirectory(random);
RandomIndexWriter writer = new RandomIndexWriter(random, store);
Fieldable f1 = new Field("field", "word", Field.Store.YES, Field.Index.ANALYZED);
Fieldable f2 = new Field("field", "word", Field.Store.YES, Field.Index.ANALYZED);
f2.setBoost(2.0f);
Document d1 = new Document();
Document d2 = new Document();
Document d3 = new Document();
Document d4 = new Document();
d3.setBoost(3.0f);
d4.setBoost(2.0f);
d1.add(f1); // boost = 1
d2.add(f2); // boost = 2
d3.add(f1); // boost = 3
d4.add(f2); // boost = 4
writer.addDocument(d1);
writer.addDocument(d2);
writer.addDocument(d3);
writer.addDocument(d4);
IndexReader reader = writer.getReader();
writer.close();
final float[] scores = new float[4];
new IndexSearcher(reader).search
(new TermQuery(new Term("field", "word")),
new Collector() {
private int base = 0;
private Scorer scorer;
@Override
public void setScorer(Scorer scorer) throws IOException {
this.scorer = scorer;
}
@Override
public final void collect(int doc) throws IOException {
scores[doc + base] = scorer.score();
}
@Override
public void setNextReader(IndexReader reader, int docBase) {
base = docBase;
}
@Override
public boolean acceptsDocsOutOfOrder() {
return true;
}
});
float lastScore = 0.0f;
for (int i = 0; i < 4; i++) {
assertTrue(scores[i] > lastScore);
lastScore = scores[i];
}
reader.close();
store.close();
}
}