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.store.Directory;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.Bits;
import java.io.IOException;
import java.util.Random;
public class TestFilterIndexReader extends LuceneTestCase {
private static class TestReader extends FilterIndexReader {
/** Filter that only permits terms containing 'e'.*/
private static class TestFields extends FilterFields {
TestFields(Fields in) {
super(in);
}
public FieldsEnum iterator() throws IOException {
return new TestFieldsEnum(super.iterator());
}
public Terms terms(String field) throws IOException {
return new TestTerms(super.terms(field));
}
}
private static class TestTerms extends FilterTerms {
TestTerms(Terms in) {
super(in);
}
public TermsEnum iterator() throws IOException {
return new TestTermsEnum(super.iterator());
}
}
private static class TestFieldsEnum extends FilterFieldsEnum {
TestFieldsEnum(FieldsEnum in) {
super(in);
}
public TermsEnum terms() throws IOException {
return new TestTermsEnum(super.terms());
}
}
private static class TestTermsEnum extends FilterTermsEnum {
public TestTermsEnum(TermsEnum in) {
super(in);
}
/** Scan for terms containing the letter 'e'.*/
@Override
public BytesRef next() throws IOException {
BytesRef text;
while ((text = in.next()) != null) {
if (text.utf8ToString().indexOf('e') != -1)
return text;
}
return null;
}
@Override
public DocsAndPositionsEnum docsAndPositions(Bits skipDocs, DocsAndPositionsEnum reuse) throws IOException {
return new TestPositions(super.docsAndPositions(skipDocs, reuse == null ? null : ((FilterDocsAndPositionsEnum) reuse).in));
}
}
/** Filter that only returns odd numbered documents. */
private static class TestPositions extends FilterDocsAndPositionsEnum {
public TestPositions(DocsAndPositionsEnum in) {
super(in);
}
/** Scan for odd numbered documents. */
@Override
public int nextDoc() throws IOException {
int doc;
while ((doc = in.nextDoc()) != NO_MORE_DOCS) {
if ((doc % 2) == 1)
return doc;
}
return NO_MORE_DOCS;
}
}
public TestReader(IndexReader reader) {
super(reader);
}
@Override
public Fields fields() throws IOException {
return new TestFields(super.fields());
}
}
/** 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 {
Random random = newRandom();
Directory directory = newDirectory(random);
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
Document d1 = new Document();
d1.add(new Field("default","one two", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d1);
Document d2 = new Document();
d2.add(new Field("default","one three", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d2);
Document d3 = new Document();
d3.add(new Field("default","two four", Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(d3);
writer.close();
//IndexReader reader = new TestReader(IndexReader.open(directory, true));
Directory target = newDirectory(random);
writer = new IndexWriter(target, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
IndexReader reader = new TestReader(IndexReader.open(directory, true));
writer.addIndexes(reader);
writer.close();
reader.close();
reader = IndexReader.open(target, true);
assertTrue(reader.isOptimized());
TermsEnum terms = MultiFields.getTerms(reader, "default").iterator();
while (terms.next() != null) {
assertTrue(terms.term().utf8ToString().indexOf('e') != -1);
}
assertEquals(TermsEnum.SeekStatus.FOUND, terms.seek(new BytesRef("one")));
DocsAndPositionsEnum positions = terms.docsAndPositions(MultiFields.getDeletedDocs(reader),
null);
while (positions.nextDoc() != DocsEnum.NO_MORE_DOCS) {
assertTrue((positions.docID() % 2) == 1);
}
reader.close();
directory.close();
target.close();
}
}