/*
* 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.
*/
package org.apache.solr.search;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import junit.framework.Assert;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.LuceneTestCase;
public class TestFilteredDocIdSet extends LuceneTestCase {
public void testFilteredDocIdSet() throws Exception {
final int maxdoc=10;
final DocIdSet innerSet = new DocIdSet() {
@Override
public long ramBytesUsed() {
return 0L;
}
@Override
public DocIdSetIterator iterator() {
return new DocIdSetIterator() {
int docid = -1;
@Override
public int docID() {
return docid;
}
@Override
public int nextDoc() {
docid++;
return docid < maxdoc ? docid : (docid = NO_MORE_DOCS);
}
@Override
public int advance(int target) throws IOException {
return slowAdvance(target);
}
@Override
public long cost() {
return 1;
}
};
}
};
DocIdSet filteredSet = new FilteredDocIdSet(innerSet){
@Override
protected boolean match(int docid) {
return docid%2 == 0; //validate only even docids
}
};
DocIdSetIterator iter = filteredSet.iterator();
ArrayList<Integer> list = new ArrayList<>();
int doc = iter.advance(3);
if (doc != DocIdSetIterator.NO_MORE_DOCS) {
list.add(Integer.valueOf(doc));
while((doc = iter.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
list.add(Integer.valueOf(doc));
}
}
int[] docs = new int[list.size()];
int c=0;
Iterator<Integer> intIter = list.iterator();
while(intIter.hasNext()) {
docs[c++] = intIter.next().intValue();
}
int[] answer = new int[]{4,6,8};
boolean same = Arrays.equals(answer, docs);
if (!same) {
System.out.println("answer: " + Arrays.toString(answer));
System.out.println("gotten: " + Arrays.toString(docs));
fail();
}
}
public void testNullDocIdSet() throws Exception {
// Tests that if a Filter produces a null DocIdSet, which is given to
// IndexSearcher, everything works fine. This came up in LUCENE-1754.
Directory dir = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random(), dir);
Document doc = new Document();
doc.add(newStringField("c", "val", Field.Store.NO));
writer.addDocument(doc);
IndexReader reader = writer.getReader();
writer.close();
// First verify the document is searchable.
IndexSearcher searcher = newSearcher(reader);
Assert.assertEquals(1, searcher.search(new MatchAllDocsQuery(), 10).totalHits);
// Now search w/ a Filter which returns a null DocIdSet
Filter f = new Filter() {
@Override
public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptDocs) {
return null;
}
@Override
public String toString(String field) {
return "nullDocIdSetFilter";
}
@Override
public boolean equals(Object other) {
return other == this;
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
};
Query filtered = new BooleanQuery.Builder()
.add(new MatchAllDocsQuery(), Occur.MUST)
.add(f, Occur.FILTER)
.build();
Assert.assertEquals(0, searcher.search(filtered, 10).totalHits);
reader.close();
dir.close();
}
public void testNullIteratorFilteredDocIdSet() throws Exception {
Directory dir = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random(), dir);
Document doc = new Document();
doc.add(newStringField("c", "val", Field.Store.NO));
writer.addDocument(doc);
IndexReader reader = writer.getReader();
writer.close();
// First verify the document is searchable.
IndexSearcher searcher = newSearcher(reader);
Assert.assertEquals(1, searcher.search(new MatchAllDocsQuery(), 10).totalHits);
// Now search w/ a Filter which returns a null DocIdSet
Filter f = new Filter() {
@Override
public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptDocs) {
final DocIdSet innerNullIteratorSet = new DocIdSet() {
@Override
public DocIdSetIterator iterator() {
return null;
}
@Override
public long ramBytesUsed() {
return 0L;
}
};
return new FilteredDocIdSet(innerNullIteratorSet) {
@Override
protected boolean match(int docid) {
return true;
}
};
}
@Override
public String toString(String field) {
return "nullDocIdSetFilter";
}
@Override
public boolean equals(Object other) {
return other == this;
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
};
Query filtered = new BooleanQuery.Builder()
.add(new MatchAllDocsQuery(), Occur.MUST)
.add(f, Occur.FILTER)
.build();
Assert.assertEquals(0, searcher.search(filtered, 10).totalHits);
reader.close();
dir.close();
}
}