org.apache.lucene.codecs.lucene46.Lucene46SegmentInfoFormat Maven / Gradle / Ivy
package org.apache.lucene.codecs.lucene46;
/*
* 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 java.text.ParseException;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import org.apache.lucene.codecs.CodecUtil;
import org.apache.lucene.codecs.SegmentInfoFormat;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexFileNames;
import org.apache.lucene.index.SegmentInfo;
import org.apache.lucene.store.ChecksumIndexInput;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IOContext;
import org.apache.lucene.util.Version;
/**
* Lucene 4.6 Segment info format.
* @deprecated only for old 4.x segments
*/
@Deprecated
public class Lucene46SegmentInfoFormat extends SegmentInfoFormat {
/** Sole constructor. */
public Lucene46SegmentInfoFormat() {
}
@Override
public SegmentInfo read(Directory dir, String segment, byte segmentID[], IOContext context) throws IOException {
final String fileName = IndexFileNames.segmentFileName(segment, "", Lucene46SegmentInfoFormat.SI_EXTENSION);
try (ChecksumIndexInput input = dir.openChecksumInput(fileName, context)) {
int codecVersion = CodecUtil.checkHeader(input, Lucene46SegmentInfoFormat.CODEC_NAME,
Lucene46SegmentInfoFormat.VERSION_START,
Lucene46SegmentInfoFormat.VERSION_CURRENT);
final Version version;
try {
version = Version.parse(input.readString());
} catch (ParseException pe) {
throw new CorruptIndexException("unable to parse version string: " + pe.getMessage(), input, pe);
}
final int docCount = input.readInt();
if (docCount < 0) {
throw new CorruptIndexException("invalid docCount: " + docCount, input);
}
final boolean isCompoundFile = input.readByte() == SegmentInfo.YES;
final Map diagnostics = Collections.unmodifiableMap(input.readStringStringMap());
final Set files = Collections.unmodifiableSet(input.readStringSet());
if (codecVersion >= Lucene46SegmentInfoFormat.VERSION_CHECKSUM) {
CodecUtil.checkFooter(input);
} else {
CodecUtil.checkEOF(input);
}
final SegmentInfo si = new SegmentInfo(dir, version, segment, docCount, isCompoundFile, null, diagnostics, null, Collections.emptyMap());
si.setFiles(files);
return si;
}
}
@Override
public void write(Directory dir, SegmentInfo info, IOContext ioContext) throws IOException {
throw new UnsupportedOperationException("this codec can only be used for reading");
}
/** File extension used to store {@link SegmentInfo}. */
final static String SI_EXTENSION = "si";
static final String CODEC_NAME = "Lucene46SegmentInfo";
static final int VERSION_START = 0;
static final int VERSION_CHECKSUM = 1;
static final int VERSION_CURRENT = VERSION_CHECKSUM;
}