blob: 9609689322424ddb2c913fda0bcba331c2357e99 [file] [log] [blame]
package org.apache.lucene.index;
/**
* 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 junit.framework.TestSuite;
import junit.textui.TestRunner;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.store.Directory;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import java.io.IOException;
public class TestFilterIndexReader extends LuceneTestCase {
private static class TestReader extends FilterIndexReader {
/** Filter that only permits terms containing 'e'.*/
private static class TestTermEnum extends FilterTermEnum {
public TestTermEnum(TermEnum termEnum) {
super(termEnum);
}
/** Scan for terms containing the letter 'e'.*/
@Override
public boolean next() throws IOException {
while (in.next()) {
if (in.term().text().indexOf('e') != -1)
return true;
}
return false;
}
}
/** Filter that only returns odd numbered documents. */
private static class TestTermPositions extends FilterTermPositions {
public TestTermPositions(TermPositions in) {
super(in);
}
/** Scan for odd numbered documents. */
@Override
public boolean next() throws IOException {
while (in.next()) {
if ((in.doc() % 2) == 1)
return true;
}
return false;
}
}
public TestReader(IndexReader reader) {
super(reader);
}
/** Filter terms with TestTermEnum. */
@Override
public TermEnum terms() throws IOException {
return new TestTermEnum(in.terms());
}
/** Filter positions with TestTermPositions. */
@Override
public TermPositions termPositions() throws IOException {
return new TestTermPositions(in.termPositions());
}
}
/** Main for running test case by itself. */
public static void main(String args[]) {
TestRunner.run (new TestSuite(TestIndexReader.class));
}
/**
* Tests the IndexReader.getFieldNames implementation
* @throws Exception on error
*/
public void testFilterIndexReader() throws Exception {
Directory directory = newDirectory();
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)));
Document d1 = new Document();
d1.add(newField("default","one two", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d1);
Document d2 = new Document();
d2.add(newField("default","one three", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d2);
Document d3 = new Document();
d3.add(newField("default","two four", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d3);
writer.close();
IndexReader reader = new TestReader(IndexReader.open(directory, true));
TermEnum terms = reader.terms();
while (terms.next()) {
assertTrue(terms.term().text().indexOf('e') != -1);
}
terms.close();
TermPositions positions = reader.termPositions(new Term("default", "one"));
while (positions.next()) {
assertTrue((positions.doc() % 2) == 1);
}
int NUM_DOCS = 3;
TermDocs td = reader.termDocs(null);
for(int i=0;i<NUM_DOCS;i++) {
assertTrue(td.next());
assertEquals(i, td.doc());
assertEquals(1, td.freq());
}
td.close();
reader.close();
directory.close();
}
}