package org.apache.lucene.index;
/*
* 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 org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.search.CollectionStatistics;
import org.apache.lucene.search.TermStatistics;
import org.apache.lucene.search.similarities.DefaultSimilarity;
import org.apache.lucene.search.similarities.PerFieldSimilarityWrapper;
import org.apache.lucene.search.similarities.Similarity;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LineFileDocs;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.LuceneTestCase.SuppressCodecs;
import org.apache.lucene.util._TestUtil;
/**
*
*/
@SuppressCodecs("Lucene3x")
public class TestCustomNorms extends LuceneTestCase {
final String floatTestField = "normsTestFloat";
final String exceptionTestField = "normsTestExcp";
public void testFloatNorms() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig config = newIndexWriterConfig(TEST_VERSION_CURRENT,
new MockAnalyzer(random()));
Similarity provider = new MySimProvider();
config.setSimilarity(provider);
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, config);
final LineFileDocs docs = new LineFileDocs(random());
int num = atLeast(100);
for (int i = 0; i < num; i++) {
Document doc = docs.nextDoc();
float nextFloat = random().nextFloat();
Field f = new TextField(floatTestField, "" + nextFloat, Field.Store.YES);
f.setBoost(nextFloat);
doc.add(f);
writer.addDocument(doc);
doc.removeField(floatTestField);
if (rarely()) {
writer.commit();
}
}
writer.commit();
writer.close();
AtomicReader open = SlowCompositeReaderWrapper.wrap(DirectoryReader.open(dir));
NumericDocValues norms = open.getNormValues(floatTestField);
assertNotNull(norms);
for (int i = 0; i < open.maxDoc(); i++) {
Document document = open.document(i);
float expected = Float.parseFloat(document.get(floatTestField));
assertEquals(expected, Float.intBitsToFloat((int)norms.get(i)), 0.0f);
}
open.close();
dir.close();
docs.close();
}
public class MySimProvider extends PerFieldSimilarityWrapper {
Similarity delegate = new DefaultSimilarity();
@Override
public float queryNorm(float sumOfSquaredWeights) {
return delegate.queryNorm(sumOfSquaredWeights);
}
@Override
public Similarity get(String field) {
if (floatTestField.equals(field)) {
return new FloatEncodingBoostSimilarity();
} else {
return delegate;
}
}
@Override
public float coord(int overlap, int maxOverlap) {
return delegate.coord(overlap, maxOverlap);
}
}
public static class FloatEncodingBoostSimilarity extends Similarity {
@Override
public long computeNorm(FieldInvertState state) {
return Float.floatToIntBits(state.getBoost());
}
@Override
public SimWeight computeWeight(float queryBoost, CollectionStatistics collectionStats, TermStatistics... termStats) {
throw new UnsupportedOperationException();
}
@Override
public SimScorer simScorer(SimWeight weight, AtomicReaderContext context) throws IOException {
throw new UnsupportedOperationException();
}
}
}