/*
* 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.
*/
package org.apache.lucene.codecs.simpletext;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.lucene.codecs.FieldInfosFormat;
import org.apache.lucene.index.DocValuesType;
import org.apache.lucene.index.FieldInfo;
import org.apache.lucene.index.FieldInfos;
import org.apache.lucene.index.IndexFileNames;
import org.apache.lucene.index.IndexOptions;
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.store.IndexOutput;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefBuilder;
import org.apache.lucene.util.IOUtils;
import org.apache.lucene.util.StringHelper;
/**
* plaintext field infos format
* <p>
* <b>FOR RECREATIONAL USE ONLY</b>
* @lucene.experimental
*/
public class SimpleTextFieldInfosFormat extends FieldInfosFormat {
/** Extension of field infos */
static final String FIELD_INFOS_EXTENSION = "inf";
static final BytesRef NUMFIELDS = new BytesRef("number of fields ");
static final BytesRef NAME = new BytesRef(" name ");
static final BytesRef NUMBER = new BytesRef(" number ");
static final BytesRef STORETV = new BytesRef(" term vectors ");
static final BytesRef STORETVPOS = new BytesRef(" term vector positions ");
static final BytesRef STORETVOFF = new BytesRef(" term vector offsets ");
static final BytesRef PAYLOADS = new BytesRef(" payloads ");
static final BytesRef NORMS = new BytesRef(" norms ");
static final BytesRef DOCVALUES = new BytesRef(" doc values ");
static final BytesRef DOCVALUES_GEN = new BytesRef(" doc values gen ");
static final BytesRef INDEXOPTIONS = new BytesRef(" index options ");
static final BytesRef NUM_ATTS = new BytesRef(" attributes ");
static final BytesRef ATT_KEY = new BytesRef(" key ");
static final BytesRef ATT_VALUE = new BytesRef(" value ");
static final BytesRef DIM_COUNT = new BytesRef(" dimensional count ");
static final BytesRef DIM_NUM_BYTES = new BytesRef(" dimensional num bytes ");
@Override
public FieldInfos read(Directory directory, SegmentInfo segmentInfo, String segmentSuffix, IOContext iocontext) throws IOException {
final String fileName = IndexFileNames.segmentFileName(segmentInfo.name, segmentSuffix, FIELD_INFOS_EXTENSION);
ChecksumIndexInput input = directory.openChecksumInput(fileName, iocontext);
BytesRefBuilder scratch = new BytesRefBuilder();
boolean success = false;
try {
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), NUMFIELDS);
final int size = Integer.parseInt(readString(NUMFIELDS.length, scratch));
FieldInfo infos[] = new FieldInfo[size];
for (int i = 0; i < size; i++) {
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), NAME);
String name = readString(NAME.length, scratch);
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), NUMBER);
int fieldNumber = Integer.parseInt(readString(NUMBER.length, scratch));
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), INDEXOPTIONS);
String s = readString(INDEXOPTIONS.length, scratch);
final IndexOptions indexOptions = IndexOptions.valueOf(s);
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), STORETV);
boolean storeTermVector = Boolean.parseBoolean(readString(STORETV.length, scratch));
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), PAYLOADS);
boolean storePayloads = Boolean.parseBoolean(readString(PAYLOADS.length, scratch));
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), NORMS);
boolean omitNorms = !Boolean.parseBoolean(readString(NORMS.length, scratch));
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), DOCVALUES);
String dvType = readString(DOCVALUES.length, scratch);
final DocValuesType docValuesType = docValuesType(dvType);
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), DOCVALUES_GEN);
final long dvGen = Long.parseLong(readString(DOCVALUES_GEN.length, scratch));
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), NUM_ATTS);
int numAtts = Integer.parseInt(readString(NUM_ATTS.length, scratch));
Map<String,String> atts = new HashMap<>();
for (int j = 0; j < numAtts; j++) {
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), ATT_KEY);
String key = readString(ATT_KEY.length, scratch);
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), ATT_VALUE);
String value = readString(ATT_VALUE.length, scratch);
atts.put(key, value);
}
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), DIM_COUNT);
int dimensionalCount = Integer.parseInt(readString(DIM_COUNT.length, scratch));
SimpleTextUtil.readLine(input, scratch);
assert StringHelper.startsWith(scratch.get(), DIM_NUM_BYTES);
int dimensionalNumBytes = Integer.parseInt(readString(DIM_NUM_BYTES.length, scratch));
infos[i] = new FieldInfo(name, fieldNumber, storeTermVector,
omitNorms, storePayloads, indexOptions, docValuesType, dvGen, Collections.unmodifiableMap(atts),
dimensionalCount, dimensionalNumBytes);
}
SimpleTextUtil.checkFooter(input);
FieldInfos fieldInfos = new FieldInfos(infos);
success = true;
return fieldInfos;
} finally {
if (success) {
input.close();
} else {
IOUtils.closeWhileHandlingException(input);
}
}
}
public DocValuesType docValuesType(String dvType) {
return DocValuesType.valueOf(dvType);
}
private String readString(int offset, BytesRefBuilder scratch) {
return new String(scratch.bytes(), offset, scratch.length()-offset, StandardCharsets.UTF_8);
}
@Override
public void write(Directory directory, SegmentInfo segmentInfo, String segmentSuffix, FieldInfos infos, IOContext context) throws IOException {
final String fileName = IndexFileNames.segmentFileName(segmentInfo.name, segmentSuffix, FIELD_INFOS_EXTENSION);
IndexOutput out = directory.createOutput(fileName, context);
BytesRefBuilder scratch = new BytesRefBuilder();
boolean success = false;
try {
SimpleTextUtil.write(out, NUMFIELDS);
SimpleTextUtil.write(out, Integer.toString(infos.size()), scratch);
SimpleTextUtil.writeNewline(out);
for (FieldInfo fi : infos) {
SimpleTextUtil.write(out, NAME);
SimpleTextUtil.write(out, fi.name, scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, NUMBER);
SimpleTextUtil.write(out, Integer.toString(fi.number), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, INDEXOPTIONS);
IndexOptions indexOptions = fi.getIndexOptions();
assert indexOptions.compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0 || !fi.hasPayloads();
SimpleTextUtil.write(out, indexOptions.toString(), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, STORETV);
SimpleTextUtil.write(out, Boolean.toString(fi.hasVectors()), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, PAYLOADS);
SimpleTextUtil.write(out, Boolean.toString(fi.hasPayloads()), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, NORMS);
SimpleTextUtil.write(out, Boolean.toString(!fi.omitsNorms()), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, DOCVALUES);
SimpleTextUtil.write(out, getDocValuesType(fi.getDocValuesType()), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, DOCVALUES_GEN);
SimpleTextUtil.write(out, Long.toString(fi.getDocValuesGen()), scratch);
SimpleTextUtil.writeNewline(out);
Map<String,String> atts = fi.attributes();
int numAtts = atts == null ? 0 : atts.size();
SimpleTextUtil.write(out, NUM_ATTS);
SimpleTextUtil.write(out, Integer.toString(numAtts), scratch);
SimpleTextUtil.writeNewline(out);
if (numAtts > 0) {
for (Map.Entry<String,String> entry : atts.entrySet()) {
SimpleTextUtil.write(out, ATT_KEY);
SimpleTextUtil.write(out, entry.getKey(), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, ATT_VALUE);
SimpleTextUtil.write(out, entry.getValue(), scratch);
SimpleTextUtil.writeNewline(out);
}
}
SimpleTextUtil.write(out, DIM_COUNT);
SimpleTextUtil.write(out, Integer.toString(fi.getPointDimensionCount()), scratch);
SimpleTextUtil.writeNewline(out);
SimpleTextUtil.write(out, DIM_NUM_BYTES);
SimpleTextUtil.write(out, Integer.toString(fi.getPointNumBytes()), scratch);
SimpleTextUtil.writeNewline(out);
}
SimpleTextUtil.writeChecksum(out, scratch);
success = true;
} finally {
if (success) {
out.close();
} else {
IOUtils.closeWhileHandlingException(out);
}
}
}
private static String getDocValuesType(DocValuesType type) {
return type.toString();
}
}