1 package org.apache.lucene.index;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
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21 import org.apache.lucene.util.LuceneTestCase;
22 import junit.framework.TestSuite;
23 import junit.textui.TestRunner;
25 import org.apache.lucene.analysis.MockAnalyzer;
26 import org.apache.lucene.store.Directory;
27 import org.apache.lucene.document.Document;
28 import org.apache.lucene.document.Field;
30 import java.io.IOException;
32 public class TestFilterIndexReader extends LuceneTestCase {
34 private static class TestReader extends FilterIndexReader {
36 /** Filter that only permits terms containing 'e'.*/
37 private static class TestTermEnum extends FilterTermEnum {
38 public TestTermEnum(TermEnum termEnum) {
42 /** Scan for terms containing the letter 'e'.*/
44 public boolean next() throws IOException {
46 if (in.term().text().indexOf('e') != -1)
53 /** Filter that only returns odd numbered documents. */
54 private static class TestTermPositions extends FilterTermPositions {
55 public TestTermPositions(TermPositions in) {
59 /** Scan for odd numbered documents. */
61 public boolean next() throws IOException {
63 if ((in.doc() % 2) == 1)
70 public TestReader(IndexReader reader) {
74 /** Filter terms with TestTermEnum. */
76 public TermEnum terms() throws IOException {
77 return new TestTermEnum(in.terms());
80 /** Filter positions with TestTermPositions. */
82 public TermPositions termPositions() throws IOException {
83 return new TestTermPositions(in.termPositions());
88 /** Main for running test case by itself. */
89 public static void main(String args[]) {
90 TestRunner.run (new TestSuite(TestIndexReader.class));
94 * Tests the IndexReader.getFieldNames implementation
95 * @throws Exception on error
97 public void testFilterIndexReader() throws Exception {
98 Directory directory = newDirectory();
99 IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)));
101 Document d1 = new Document();
102 d1.add(newField("default","one two", Field.Store.YES, Field.Index.ANALYZED));
103 writer.addDocument(d1);
105 Document d2 = new Document();
106 d2.add(newField("default","one three", Field.Store.YES, Field.Index.ANALYZED));
107 writer.addDocument(d2);
109 Document d3 = new Document();
110 d3.add(newField("default","two four", Field.Store.YES, Field.Index.ANALYZED));
111 writer.addDocument(d3);
115 IndexReader reader = new TestReader(IndexReader.open(directory, true));
116 TermEnum terms = reader.terms();
117 while (terms.next()) {
118 assertTrue(terms.term().text().indexOf('e') != -1);
122 TermPositions positions = reader.termPositions(new Term("default", "one"));
123 while (positions.next()) {
124 assertTrue((positions.doc() % 2) == 1);
129 TermDocs td = reader.termDocs(null);
130 for(int i=0;i<NUM_DOCS;i++) {
131 assertTrue(td.next());
132 assertEquals(i, td.doc());
133 assertEquals(1, td.freq());