package org.apache.lucene.codecs.lucene3x;
/*
* 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.IOException;
import org.apache.lucene.codecs.TermVectorsReader;
import org.apache.lucene.codecs.TermVectorsWriter;
import org.apache.lucene.index.FieldInfos;
import org.apache.lucene.index.SegmentInfo;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IOContext;
import org.apache.lucene.util.LuceneTestCase;
class PreFlexRWTermVectorsFormat extends Lucene3xTermVectorsFormat {
@Override
public TermVectorsWriter vectorsWriter(Directory directory, SegmentInfo segmentInfo, IOContext context) throws IOException {
return new PreFlexRWTermVectorsWriter(directory, segmentInfo.name, context);
}
@Override
public TermVectorsReader vectorsReader(Directory directory, SegmentInfo segmentInfo, FieldInfos fieldInfos, IOContext context) throws IOException {
return new Lucene3xTermVectorsReader(directory, segmentInfo, fieldInfos, context) {
@Override
protected boolean sortTermsByUnicode() {
// We carefully peek into stack track above us: if
// we are part of a "merge", we must sort by UTF16:
boolean unicodeSortOrder = true;
StackTraceElement[] trace = new Exception().getStackTrace();
for (int i = 0; i < trace.length; i++) {
//System.out.println(trace[i].getClassName());
if ("merge".equals(trace[i].getMethodName())) {
unicodeSortOrder = false;
if (LuceneTestCase.VERBOSE) {
System.out.println("NOTE: PreFlexRW codec: forcing legacy UTF16 vector term sort order");
}
break;
}
}
return unicodeSortOrder;
}
};
}
}