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LUCENE-2365: IndexWriter.newestSegment returns null if there are no segments 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@930932 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless 2010-04-05 19:31:43 +00:00
parent aa949373b3
commit 1b3d0eb274
3 changed files with 38 additions and 1 deletions
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4
lucene/CHANGES.txt
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@ -157,6 +157,10 @@ Bug fixes
* LUCENE-2328: Index files fsync tracking moved from
IndexWriter/IndexReader to Directory, and it no longer leaks memory.
(Earwin Burrfoot via Mike McCandless)
* LUCENE-2365: IndexWriter.newestSegment (used normally for testing)
is fixed to return null if there are no segments. (Karthick
Sankarachary via Mike McCandless)
New features

2
lucene/src/java/org/apache/lucene/index/IndexWriter.java
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@ -4587,7 +4587,7 @@ public class IndexWriter implements Closeable {
// utility routines for tests
SegmentInfo newestSegment() {
return segmentInfos.info(segmentInfos.size()-1);
return segmentInfos.size() > 0 ? segmentInfos.info(segmentInfos.size()-1) : null;
}
public synchronized String segString() {

33
lucene/src/test/org/apache/lucene/index/TestNewestSegment.java Normal file
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@ -0,0 +1,33 @@
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.analysis.Analyzer;
import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.index.IndexWriter.MaxFieldLength;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.LuceneTestCase;
public class TestNewestSegment extends LuceneTestCase {
public void testNewestSegment() throws Exception {
RAMDirectory directory = new RAMDirectory();
Analyzer analyzer = new SimpleAnalyzer();
IndexWriter writer = new IndexWriter(directory, new IndexWriterConfig(TEST_VERSION_CURRENT, new SimpleAnalyzer(TEST_VERSION_CURRENT)));
assertNull(writer.newestSegment());
}
}