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.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Scorer.ChildScorer;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
// TODO: refactor to a base class, that collects freqs from the scorer tree
// and test all queries with it
public class TestBooleanQueryVisitSubscorers extends LuceneTestCase {
Analyzer analyzer;
IndexReader reader;
IndexSearcher searcher;
Directory dir;
static final String F1 = "title";
static final String F2 = "body";
@Override
public void setUp() throws Exception {
super.setUp();
analyzer = new MockAnalyzer(random());
dir = newDirectory();
IndexWriterConfig config = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
config.setMergePolicy(newLogMergePolicy()); // we will use docids to validate
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, config);
writer.addDocument(doc("lucene", "lucene is a very popular search engine library"));
writer.addDocument(doc("solr", "solr is a very popular search server and is using lucene"));
writer.addDocument(doc("nutch", "nutch is an internet search engine with web crawler and is using lucene and hadoop"));
reader = writer.getReader();
writer.close();
searcher = newSearcher(reader);
}
@Override
public void tearDown() throws Exception {
reader.close();
dir.close();
super.tearDown();
}
public void testDisjunctions() throws IOException {
BooleanQuery bq = new BooleanQuery();
bq.add(new TermQuery(new Term(F1, "lucene")), BooleanClause.Occur.SHOULD);
bq.add(new TermQuery(new Term(F2, "lucene")), BooleanClause.Occur.SHOULD);
bq.add(new TermQuery(new Term(F2, "search")), BooleanClause.Occur.SHOULD);
Map<Integer,Integer> tfs = getDocCounts(searcher, bq);
assertEquals(3, tfs.size()); // 3 documents
assertEquals(3, tfs.get(0).intValue()); // f1:lucene + f2:lucene + f2:search
assertEquals(2, tfs.get(1).intValue()); // f2:search + f2:lucene
assertEquals(2, tfs.get(2).intValue()); // f2:search + f2:lucene
}
public void testNestedDisjunctions() throws IOException {
BooleanQuery bq = new BooleanQuery();
bq.add(new TermQuery(new Term(F1, "lucene")), BooleanClause.Occur.SHOULD);
BooleanQuery bq2 = new BooleanQuery();
bq2.add(new TermQuery(new Term(F2, "lucene")), BooleanClause.Occur.SHOULD);
bq2.add(new TermQuery(new Term(F2, "search")), BooleanClause.Occur.SHOULD);
bq.add(bq2, BooleanClause.Occur.SHOULD);
Map<Integer,Integer> tfs = getDocCounts(searcher, bq);
assertEquals(3, tfs.size()); // 3 documents
assertEquals(3, tfs.get(0).intValue()); // f1:lucene + f2:lucene + f2:search
assertEquals(2, tfs.get(1).intValue()); // f2:search + f2:lucene
assertEquals(2, tfs.get(2).intValue()); // f2:search + f2:lucene
}
public void testConjunctions() throws IOException {
BooleanQuery bq = new BooleanQuery();
bq.add(new TermQuery(new Term(F2, "lucene")), BooleanClause.Occur.MUST);
bq.add(new TermQuery(new Term(F2, "is")), BooleanClause.Occur.MUST);
Map<Integer,Integer> tfs = getDocCounts(searcher, bq);
assertEquals(3, tfs.size()); // 3 documents
assertEquals(2, tfs.get(0).intValue()); // f2:lucene + f2:is
assertEquals(3, tfs.get(1).intValue()); // f2:is + f2:is + f2:lucene
assertEquals(3, tfs.get(2).intValue()); // f2:is + f2:is + f2:lucene
}
static Document doc(String v1, String v2) {
Document doc = new Document();
doc.add(new TextField(F1, v1, Store.YES));
doc.add(new TextField(F2, v2, Store.YES));
return doc;
}
static Map<Integer,Integer> getDocCounts(IndexSearcher searcher, Query query) throws IOException {
MyCollector collector = new MyCollector();
searcher.search(query, collector);
return collector.docCounts;
}
static class MyCollector extends Collector {
private TopDocsCollector<ScoreDoc> collector;
private int docBase;
public final Map<Integer,Integer> docCounts = new HashMap<Integer,Integer>();
private final Set<Scorer> tqsSet = new HashSet<Scorer>();
MyCollector() {
collector = TopScoreDocCollector.create(10, true);
}
@Override
public boolean acceptsDocsOutOfOrder() {
return false;
}
@Override
public void collect(int doc) throws IOException {
int freq = 0;
for(Scorer scorer : tqsSet) {
if (doc == scorer.docID()) {
freq += scorer.freq();
}
}
docCounts.put(doc + docBase, freq);
collector.collect(doc);
}
@Override
public void setNextReader(AtomicReaderContext context) throws IOException {
this.docBase = context.docBase;
collector.setNextReader(context);
}
@Override
public void setScorer(Scorer scorer) throws IOException {
collector.setScorer(scorer);
tqsSet.clear();
fillLeaves(scorer, tqsSet);
}
private void fillLeaves(Scorer scorer, Set<Scorer> set) {
if (scorer.getWeight().getQuery() instanceof TermQuery) {
set.add(scorer);
} else {
for (ChildScorer child : scorer.getChildren()) {
fillLeaves(child.child, set);
}
}
}
public TopDocs topDocs(){
return collector.topDocs();
}
public int freq(int doc) throws IOException {
return docCounts.get(doc);
}
}
}