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 java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import junit.framework.TestSuite;
import junit.textui.TestRunner;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.index.codecs.CodecProvider;
/** JUnit adaptation of an older test case DocTest. */
public class TestDoc extends LuceneTestCase {
/** Main for running test case by itself. */
public static void main(String args[]) {
TestRunner.run (new TestSuite(TestDoc.class));
}
private File workDir;
private File indexDir;
private LinkedList<File> files;
/** Set the test case. This test case needs
* a few text files created in the current working directory.
*/
@Override
protected void setUp() throws Exception {
super.setUp();
workDir = new File(TEMP_DIR,"TestDoc");
workDir.mkdirs();
indexDir = new File(workDir, "testIndex");
indexDir.mkdirs();
Directory directory = FSDirectory.open(indexDir);
directory.close();
files = new LinkedList<File>();
files.add(createOutput("test.txt",
"This is the first test file"
));
files.add(createOutput("test2.txt",
"This is the second test file"
));
}
private File createOutput(String name, String text) throws IOException {
FileWriter fw = null;
PrintWriter pw = null;
try {
File f = new File(workDir, name);
if (f.exists()) f.delete();
fw = new FileWriter(f);
pw = new PrintWriter(fw);
pw.println(text);
return f;
} finally {
if (pw != null) pw.close();
if (fw != null) fw.close();
}
}
/** This test executes a number of merges and compares the contents of
* the segments created when using compound file or not using one.
*
* TODO: the original test used to print the segment contents to System.out
* for visual validation. To have the same effect, a new method
* checkSegment(String name, ...) should be created that would
* assert various things about the segment.
*/
public void testIndexAndMerge() throws Exception {
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw, true);
Random random = newRandom();
Directory directory = FSDirectory.open(indexDir);
IndexWriter writer = new IndexWriter(directory, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setOpenMode(OpenMode.CREATE).setMaxBufferedDocs(-1));
((LogMergePolicy) writer.getMergePolicy()).setMergeFactor(10);
SegmentInfo si1 = indexDoc(writer, "test.txt");
printSegment(out, si1);
SegmentInfo si2 = indexDoc(writer, "test2.txt");
printSegment(out, si2);
writer.close();
SegmentInfo siMerge = merge(si1, si2, "merge", false);
printSegment(out, siMerge);
SegmentInfo siMerge2 = merge(si1, si2, "merge2", false);
printSegment(out, siMerge2);
SegmentInfo siMerge3 = merge(siMerge, siMerge2, "merge3", false);
printSegment(out, siMerge3);
directory.close();
out.close();
sw.close();
String multiFileOutput = sw.getBuffer().toString();
//System.out.println(multiFileOutput);
sw = new StringWriter();
out = new PrintWriter(sw, true);
directory = FSDirectory.open(indexDir);
writer = new IndexWriter(directory, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setOpenMode(OpenMode.CREATE).setMaxBufferedDocs(-1));
((LogMergePolicy) writer.getMergePolicy()).setMergeFactor(10);
si1 = indexDoc(writer, "test.txt");
printSegment(out, si1);
si2 = indexDoc(writer, "test2.txt");
printSegment(out, si2);
writer.close();
siMerge = merge(si1, si2, "merge", true);
printSegment(out, siMerge);
siMerge2 = merge(si1, si2, "merge2", true);
printSegment(out, siMerge2);
siMerge3 = merge(siMerge, siMerge2, "merge3", true);
printSegment(out, siMerge3);
directory.close();
out.close();
sw.close();
String singleFileOutput = sw.getBuffer().toString();
assertEquals(multiFileOutput, singleFileOutput);
}
private SegmentInfo indexDoc(IndexWriter writer, String fileName)
throws Exception
{
File file = new File(workDir, fileName);
Document doc = new Document();
doc.add(new Field("contents", new FileReader(file)));
writer.addDocument(doc);
writer.commit();
return writer.newestSegment();
}
private SegmentInfo merge(SegmentInfo si1, SegmentInfo si2, String merged, boolean useCompoundFile)
throws Exception {
SegmentReader r1 = SegmentReader.get(true, si1, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);
SegmentReader r2 = SegmentReader.get(true, si2, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);
SegmentMerger merger = new SegmentMerger(si1.dir, IndexWriter.DEFAULT_TERM_INDEX_INTERVAL, merged, null, CodecProvider.getDefault(), null);
merger.add(r1);
merger.add(r2);
merger.merge();
merger.closeReaders();
final SegmentInfo info = new SegmentInfo(merged, si1.docCount + si2.docCount, si1.dir,
useCompoundFile, -1, null, false, merger.hasProx(), merger.getCodec());
if (useCompoundFile) {
List<String> filesToDelete = merger.createCompoundFile(merged + ".cfs", info);
for (final String fileToDelete : filesToDelete)
si1.dir.deleteFile(fileToDelete);
}
return info;
}
private void printSegment(PrintWriter out, SegmentInfo si)
throws Exception {
SegmentReader reader = SegmentReader.get(true, si, IndexReader.DEFAULT_TERMS_INDEX_DIVISOR);
for (int i = 0; i < reader.numDocs(); i++)
out.println(reader.document(i));
FieldsEnum fis = reader.fields().iterator();
String field = fis.next();
while(field != null) {
TermsEnum tis = fis.terms();
while(tis.next() != null) {
out.print(" term=" + field + ":" + tis.term());
out.println(" DF=" + tis.docFreq());
DocsAndPositionsEnum positions = tis.docsAndPositions(reader.getDeletedDocs(), null);
while (positions.nextDoc() != positions.NO_MORE_DOCS) {
out.print(" doc=" + positions.docID());
out.print(" TF=" + positions.freq());
out.print(" pos=");
out.print(positions.nextPosition());
for (int j = 1; j < positions.freq(); j++)
out.print("," + positions.nextPosition());
out.println("");
}
}
field = fis.next();
}
reader.close();
}
}