| 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(); |
| BulkScorer ts = weight.bulkScorer(context, 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<>(); |
| // must call next first |
| |
| ts.score(new SimpleCollector() { |
| 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 |
| protected void doSetNextReader(AtomicReaderContext context) throws IOException { |
| 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, 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, 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 + "}"; |
| } |
| } |
| |
| } |