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.ArrayList;
import java.util.List;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.SlowCompositeReaderWrapper;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.similarities.DefaultSimilarity;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
public class TestTermScorer extends LuceneTestCase {
protected Directory directory;
private static final String FIELD = "field";
protected String[] values = new String[] {"all", "dogs dogs", "like",
"playing", "fetch", "all"};
protected IndexSearcher indexSearcher;
protected IndexReader indexReader;
@Override
public void setUp() throws Exception {
super.setUp();
directory = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random(), directory,
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()))
.setMergePolicy(newLogMergePolicy())
.setSimilarity(new DefaultSimilarity()));
for (int i = 0; i < values.length; i++) {
Document doc = new Document();
doc
.add(newTextField(FIELD, values[i], Field.Store.YES));
writer.addDocument(doc);
}
indexReader = SlowCompositeReaderWrapper.wrap(writer.getReader());
writer.close();
indexSearcher = newSearcher(indexReader);
indexSearcher.setSimilarity(new DefaultSimilarity());
}
@Override
public void tearDown() throws Exception {
indexReader.close();
directory.close();
super.tearDown();
}
public void test() throws IOException {
Term allTerm = new Term(FIELD, "all");
TermQuery termQuery = new TermQuery(allTerm);
Weight weight = indexSearcher.createNormalizedWeight(termQuery);
assertTrue(indexSearcher.getTopReaderContext() instanceof AtomicReaderContext);
AtomicReaderContext context = (AtomicReaderContext)indexSearcher.getTopReaderContext();
Scorer ts = weight.scorer(context, true, true, context.reader().getLiveDocs());
// we have 2 documents with the term all in them, one document for all the
// other values
final List<TestHit> docs = new ArrayList<TestHit>();
// must call next first
ts.score(new Collector() {
private int base = 0;
private Scorer scorer;
@Override
public void setScorer(Scorer scorer) {
this.scorer = scorer;
}
@Override
public void collect(int doc) throws IOException {
float score = scorer.score();
doc = doc + base;
docs.add(new TestHit(doc, score));
assertTrue("score " + score + " is not greater than 0", score > 0);
assertTrue("Doc: " + doc + " does not equal 0 or doc does not equal 5",
doc == 0 || doc == 5);
}
@Override
public void setNextReader(AtomicReaderContext context) {
base = context.docBase;
}
@Override
public boolean acceptsDocsOutOfOrder() {
return true;
}
});
assertTrue("docs Size: " + docs.size() + " is not: " + 2, docs.size() == 2);
TestHit doc0 = docs.get(0);
TestHit doc5 = docs.get(1);
// The scores should be the same
assertTrue(doc0.score + " does not equal: " + doc5.score,
doc0.score == doc5.score);
/*
* Score should be (based on Default Sim.: All floats are approximate tf = 1
* numDocs = 6 docFreq(all) = 2 idf = ln(6/3) + 1 = 1.693147 idf ^ 2 =
* 2.8667 boost = 1 lengthNorm = 1 //there is 1 term in every document coord
* = 1 sumOfSquaredWeights = (idf * boost) ^ 2 = 1.693147 ^ 2 = 2.8667
* queryNorm = 1 / (sumOfSquaredWeights)^0.5 = 1 /(1.693147) = 0.590
*
* score = 1 * 2.8667 * 1 * 1 * 0.590 = 1.69
*/
assertTrue(doc0.score + " does not equal: " + 1.6931472f,
doc0.score == 1.6931472f);
}
public void testNext() throws Exception {
Term allTerm = new Term(FIELD, "all");
TermQuery termQuery = new TermQuery(allTerm);
Weight weight = indexSearcher.createNormalizedWeight(termQuery);
assertTrue(indexSearcher.getTopReaderContext() instanceof AtomicReaderContext);
AtomicReaderContext context = (AtomicReaderContext) indexSearcher.getTopReaderContext();
Scorer ts = weight.scorer(context, true, false, context.reader().getLiveDocs());
assertTrue("next did not return a doc",
ts.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
assertTrue("score is not correct", ts.score() == 1.6931472f);
assertTrue("next did not return a doc",
ts.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
assertTrue("score is not correct", ts.score() == 1.6931472f);
assertTrue("next returned a doc and it should not have",
ts.nextDoc() == DocIdSetIterator.NO_MORE_DOCS);
}
public void testAdvance() throws Exception {
Term allTerm = new Term(FIELD, "all");
TermQuery termQuery = new TermQuery(allTerm);
Weight weight = indexSearcher.createNormalizedWeight(termQuery);
assertTrue(indexSearcher.getTopReaderContext() instanceof AtomicReaderContext);
AtomicReaderContext context = (AtomicReaderContext) indexSearcher.getTopReaderContext();
Scorer ts = weight.scorer(context, true, false, context.reader().getLiveDocs());
assertTrue("Didn't skip", ts.advance(3) != DocIdSetIterator.NO_MORE_DOCS);
// The next doc should be doc 5
assertTrue("doc should be number 5", ts.docID() == 5);
}
private class TestHit {
public int doc;
public float score;
public TestHit(int doc, float score) {
this.doc = doc;
this.score = score;
}
@Override
public String toString() {
return "TestHit{" + "doc=" + doc + ", score=" + score + "}";
}
}
}