| 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 org.apache.lucene.util.LuceneTestCase; |
| import java.io.IOException; |
| import java.util.Collection; |
| |
| import org.apache.lucene.index.FieldInvertState; |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.index.RandomIndexWriter; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.analysis.MockAnalyzer; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.search.Explanation.IDFExplanation; |
| |
| /** Similarity unit test. |
| * |
| * |
| * @version $Revision$ |
| */ |
| public class TestSimilarity extends LuceneTestCase { |
| |
| public static class SimpleSimilarity extends Similarity { |
| @Override public float computeNorm(String field, FieldInvertState state) { return state.getBoost(); } |
| @Override public float queryNorm(float sumOfSquaredWeights) { return 1.0f; } |
| @Override public float tf(float freq) { return freq; } |
| @Override public float sloppyFreq(int distance) { return 2.0f; } |
| @Override public float idf(int docFreq, int numDocs) { return 1.0f; } |
| @Override public float coord(int overlap, int maxOverlap) { return 1.0f; } |
| @Override public IDFExplanation idfExplain(Collection<Term> terms, Searcher searcher) throws IOException { |
| return new IDFExplanation() { |
| @Override |
| public float getIdf() { |
| return 1.0f; |
| } |
| @Override |
| public String explain() { |
| return "Inexplicable"; |
| } |
| }; |
| } |
| } |
| |
| public void testSimilarity() throws Exception { |
| Directory store = newDirectory(); |
| RandomIndexWriter writer = new RandomIndexWriter(random, store, |
| newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)) |
| .setSimilarity(new SimpleSimilarity())); |
| |
| Document d1 = new Document(); |
| d1.add(newField("field", "a c", Field.Store.YES, Field.Index.ANALYZED)); |
| |
| Document d2 = new Document(); |
| d2.add(newField("field", "a b c", Field.Store.YES, Field.Index.ANALYZED)); |
| |
| writer.addDocument(d1); |
| writer.addDocument(d2); |
| IndexReader reader = writer.getReader(); |
| writer.close(); |
| |
| IndexSearcher searcher = newSearcher(reader); |
| searcher.setSimilarity(new SimpleSimilarity()); |
| |
| Term a = new Term("field", "a"); |
| Term b = new Term("field", "b"); |
| Term c = new Term("field", "c"); |
| |
| searcher.search(new TermQuery(b), new Collector() { |
| private Scorer scorer; |
| @Override |
| public void setScorer(Scorer scorer) throws IOException { |
| this.scorer = scorer; |
| } |
| @Override |
| public final void collect(int doc) throws IOException { |
| assertEquals(1.0f, scorer.score()); |
| } |
| @Override |
| public void setNextReader(IndexReader reader, int docBase) {} |
| @Override |
| public boolean acceptsDocsOutOfOrder() { |
| return true; |
| } |
| }); |
| |
| BooleanQuery bq = new BooleanQuery(); |
| bq.add(new TermQuery(a), BooleanClause.Occur.SHOULD); |
| bq.add(new TermQuery(b), BooleanClause.Occur.SHOULD); |
| //System.out.println(bq.toString("field")); |
| searcher.search(bq, 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 { |
| //System.out.println("Doc=" + doc + " score=" + score); |
| assertEquals((float)doc+base+1, scorer.score()); |
| } |
| @Override |
| public void setNextReader(IndexReader reader, int docBase) { |
| base = docBase; |
| } |
| @Override |
| public boolean acceptsDocsOutOfOrder() { |
| return true; |
| } |
| }); |
| |
| PhraseQuery pq = new PhraseQuery(); |
| pq.add(a); |
| pq.add(c); |
| //System.out.println(pq.toString("field")); |
| searcher.search(pq, |
| new Collector() { |
| private Scorer scorer; |
| @Override |
| public void setScorer(Scorer scorer) throws IOException { |
| this.scorer = scorer; |
| } |
| @Override |
| public final void collect(int doc) throws IOException { |
| //System.out.println("Doc=" + doc + " score=" + score); |
| assertEquals(1.0f, scorer.score()); |
| } |
| @Override |
| public void setNextReader(IndexReader reader, int docBase) {} |
| @Override |
| public boolean acceptsDocsOutOfOrder() { |
| return true; |
| } |
| }); |
| |
| pq.setSlop(2); |
| //System.out.println(pq.toString("field")); |
| searcher.search(pq, new Collector() { |
| private Scorer scorer; |
| @Override |
| public void setScorer(Scorer scorer) throws IOException { |
| this.scorer = scorer; |
| } |
| @Override |
| public final void collect(int doc) throws IOException { |
| //System.out.println("Doc=" + doc + " score=" + score); |
| assertEquals(2.0f, scorer.score()); |
| } |
| @Override |
| public void setNextReader(IndexReader reader, int docBase) {} |
| @Override |
| public boolean acceptsDocsOutOfOrder() { |
| return true; |
| } |
| }); |
| |
| searcher.close(); |
| reader.close(); |
| store.close(); |
| } |
| } |