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 java.util.Set;
import org.apache.lucene.codecs.FieldInfosReader;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.FieldInfo.DocValuesType;
import org.apache.lucene.index.FieldInfo;
import org.apache.lucene.index.FieldInfos;
import org.apache.lucene.index.IndexFileNames;
import org.apache.lucene.index.IndexFormatTooNewException;
import org.apache.lucene.index.IndexFormatTooOldException;
import org.apache.lucene.index.SegmentInfo;
import org.apache.lucene.index.FieldInfo.IndexOptions;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IOContext;
import org.apache.lucene.store.IndexInput;
/**
* @lucene.internal
* @lucene.experimental
*/
class PreFlexRWFieldInfosReader extends FieldInfosReader {
static final int FORMAT_MINIMUM = PreFlexRWFieldInfosWriter.FORMAT_START;
@Override
public FieldInfos read(Directory directory, String segmentName, String segmentSuffix, IOContext iocontext) throws IOException {
final String fileName = IndexFileNames.segmentFileName(segmentName, "", PreFlexRWFieldInfosWriter.FIELD_INFOS_EXTENSION);
IndexInput input = directory.openInput(fileName, iocontext);
try {
final int format = input.readVInt();
if (format > FORMAT_MINIMUM) {
throw new IndexFormatTooOldException(input, format, FORMAT_MINIMUM, PreFlexRWFieldInfosWriter.FORMAT_CURRENT);
}
if (format < PreFlexRWFieldInfosWriter.FORMAT_CURRENT && format != PreFlexRWFieldInfosWriter.FORMAT_PREFLEX_RW) {
throw new IndexFormatTooNewException(input, format, FORMAT_MINIMUM, PreFlexRWFieldInfosWriter.FORMAT_CURRENT);
}
final int size = input.readVInt(); //read in the size
FieldInfo infos[] = new FieldInfo[size];
for (int i = 0; i < size; i++) {
String name = input.readString();
final int fieldNumber = format == PreFlexRWFieldInfosWriter.FORMAT_PREFLEX_RW ? input.readInt() : i;
byte bits = input.readByte();
boolean isIndexed = (bits & PreFlexRWFieldInfosWriter.IS_INDEXED) != 0;
boolean storeTermVector = (bits & PreFlexRWFieldInfosWriter.STORE_TERMVECTOR) != 0;
boolean omitNorms = (bits & PreFlexRWFieldInfosWriter.OMIT_NORMS) != 0;
boolean storePayloads = (bits & PreFlexRWFieldInfosWriter.STORE_PAYLOADS) != 0;
final IndexOptions indexOptions;
if (!isIndexed) {
indexOptions = null;
} else if ((bits & PreFlexRWFieldInfosWriter.OMIT_TERM_FREQ_AND_POSITIONS) != 0) {
indexOptions = IndexOptions.DOCS_ONLY;
} else if ((bits & PreFlexRWFieldInfosWriter.OMIT_POSITIONS) != 0) {
if (format <= PreFlexRWFieldInfosWriter.FORMAT_OMIT_POSITIONS) {
indexOptions = IndexOptions.DOCS_AND_FREQS;
} else {
throw new CorruptIndexException("Corrupt fieldinfos, OMIT_POSITIONS set but format=" + format + " (resource: " + input + ")");
}
} else {
indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS;
}
// LUCENE-3027: past indices were able to write
// storePayloads=true when omitTFAP is also true,
// which is invalid. We correct that, here:
if (indexOptions != IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) {
storePayloads = false;
}
DocValuesType normType = isIndexed && !omitNorms ? DocValuesType.NUMERIC : null;
if (format == PreFlexRWFieldInfosWriter.FORMAT_PREFLEX_RW && normType != null) {
// RW can have norms but doesn't write them
normType = input.readByte() != 0 ? DocValuesType.NUMERIC : null;
}
infos[i] = new FieldInfo(name, isIndexed, fieldNumber, storeTermVector,
omitNorms, storePayloads, indexOptions, null, normType, null);
}
if (input.getFilePointer() != input.length()) {
throw new CorruptIndexException("did not read all bytes from file \"" + fileName + "\": read " + input.getFilePointer() + " vs size " + input.length() + " (resource: " + input + ")");
}
return new FieldInfos(infos);
} finally {
input.close();
}
}
public static void files(Directory dir, SegmentInfo info, Set<String> files) throws IOException {
files.add(IndexFileNames.segmentFileName(info.name, "", PreFlexRWFieldInfosWriter.FIELD_INFOS_EXTENSION));
}
}