1 package org.apache.lucene.search;
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20 import java.io.IOException;
21 import java.util.ArrayList;
22 import java.util.Arrays;
23 import java.util.Iterator;
25 import junit.framework.Assert;
27 import org.apache.lucene.document.Document;
28 import org.apache.lucene.document.Field.Index;
29 import org.apache.lucene.document.Field.Store;
30 import org.apache.lucene.index.IndexReader;
31 import org.apache.lucene.index.RandomIndexWriter;
32 import org.apache.lucene.store.Directory;
33 import org.apache.lucene.util.LuceneTestCase;
35 public class TestDocIdSet extends LuceneTestCase {
36 public void testFilteredDocIdSet() throws Exception {
38 final DocIdSet innerSet = new DocIdSet() {
41 public DocIdSetIterator iterator() {
42 return new DocIdSetIterator() {
52 public int nextDoc() throws IOException {
54 return docid < maxdoc ? docid : (docid = NO_MORE_DOCS);
58 public int advance(int target) throws IOException {
59 while (nextDoc() < target) {}
67 DocIdSet filteredSet = new FilteredDocIdSet(innerSet){
69 protected boolean match(int docid) {
70 return docid%2 == 0; //validate only even docids
74 DocIdSetIterator iter = filteredSet.iterator();
75 ArrayList<Integer> list = new ArrayList<Integer>();
76 int doc = iter.advance(3);
77 if (doc != DocIdSetIterator.NO_MORE_DOCS) {
78 list.add(Integer.valueOf(doc));
79 while((doc = iter.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
80 list.add(Integer.valueOf(doc));
84 int[] docs = new int[list.size()];
86 Iterator<Integer> intIter = list.iterator();
87 while(intIter.hasNext()) {
88 docs[c++] = intIter.next().intValue();
90 int[] answer = new int[]{4,6,8};
91 boolean same = Arrays.equals(answer, docs);
93 System.out.println("answer: " + Arrays.toString(answer));
94 System.out.println("gotten: " + Arrays.toString(docs));
99 public void testNullDocIdSet() throws Exception {
100 // Tests that if a Filter produces a null DocIdSet, which is given to
101 // IndexSearcher, everything works fine. This came up in LUCENE-1754.
102 Directory dir = newDirectory();
103 RandomIndexWriter writer = new RandomIndexWriter(random, dir);
104 Document doc = new Document();
105 doc.add(newField("c", "val", Store.NO, Index.NOT_ANALYZED_NO_NORMS));
106 writer.addDocument(doc);
107 IndexReader reader = writer.getReader();
110 // First verify the document is searchable.
111 IndexSearcher searcher = newSearcher(reader);
112 Assert.assertEquals(1, searcher.search(new MatchAllDocsQuery(), 10).totalHits);
114 // Now search w/ a Filter which returns a null DocIdSet
115 Filter f = new Filter() {
117 public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
122 Assert.assertEquals(0, searcher.search(new MatchAllDocsQuery(), f, 10).totalHits);