private void writeTable(
Iterable<Number> values,
FormatAndBits compression,
int count,
NormMap uniqueValues,
int numOrds)
throws IOException {
data.writeVInt(PackedInts.VERSION_CURRENT);
data.writeVInt(compression.format.getId());
data.writeVInt(compression.bitsPerValue);
data.writeVInt(numOrds);
for (int i = 0; i < numOrds; i++) {
data.writeByte(uniqueValues.values[i]);
}
final PackedInts.Writer writer =
PackedInts.getWriterNoHeader(
data,
compression.format,
count,
compression.bitsPerValue,
PackedInts.DEFAULT_BUFFER_SIZE);
for (Number nv : values) {
int ord = uniqueValues.ord(nv.byteValue());
if (ord < numOrds) {
writer.add(ord);
} else {
writer.add(numOrds); // collapses all ords >= numOrds into a single value
}
}
writer.finish();
}
@Override
public void close() throws IOException {
IOException ioe = null;
try {
final long dirStart = out.getFilePointer();
final long indexDirStart = indexOut.getFilePointer();
out.writeVInt(fields.size());
for (FieldMetaData field : fields) {
// System.out.println(" field " + field.fieldInfo.name + " " + field.numTerms + " terms");
out.writeVInt(field.fieldInfo.number);
out.writeVLong(field.numTerms);
out.writeVInt(field.rootCode.length);
out.writeBytes(field.rootCode.bytes, field.rootCode.offset, field.rootCode.length);
if (field.fieldInfo.getIndexOptions() != IndexOptions.DOCS_ONLY) {
out.writeVLong(field.sumTotalTermFreq);
}
out.writeVLong(field.sumDocFreq);
out.writeVInt(field.docCount);
indexOut.writeVLong(field.indexStartFP);
}
writeTrailer(out, dirStart);
writeIndexTrailer(indexOut, indexDirStart);
} catch (IOException ioe2) {
ioe = ioe2;
} finally {
IOUtils.closeWhileHandlingException(ioe, out, indexOut, postingsWriter);
}
}
private void writeDoc() throws IOException {
if (isFieldOpen())
throw new IllegalStateException("Field is still open while writing document");
// System.out.println("Writing doc pointer: " + currentDocPointer);
// write document index record
tvx.writeLong(currentDocPointer);
// write document data record
final int size = fields.size();
// write the number of fields
tvd.writeVInt(size);
// write field numbers
for (int i = 0; i < size; i++) {
TVField field = (TVField) fields.elementAt(i);
tvd.writeVInt(field.number);
}
// write field pointers
long lastFieldPointer = 0;
for (int i = 0; i < size; i++) {
TVField field = (TVField) fields.elementAt(i);
tvd.writeVLong(field.tvfPointer - lastFieldPointer);
lastFieldPointer = field.tvfPointer;
}
// System.out.println("After writing doc pointer: " + tvx.getFilePointer());
}
public void close() throws IOException {
try {
final long dirStart = out.getFilePointer();
final int fieldCount = fields.size();
int nonNullFieldCount = 0;
for (int i = 0; i < fieldCount; i++) {
FSTFieldWriter field = fields.get(i);
if (field.fst != null) {
nonNullFieldCount++;
}
}
out.writeVInt(nonNullFieldCount);
for (int i = 0; i < fieldCount; i++) {
FSTFieldWriter field = fields.get(i);
if (field.fst != null) {
out.writeVInt(field.fieldInfo.number);
out.writeVLong(field.indexStart);
}
}
writeTrailer(dirStart);
} finally {
out.close();
}
}
private void addDeltaCompressed(Iterable<Number> values, int count) throws IOException {
meta.writeVInt(count);
meta.writeByte(DELTA_COMPRESSED); // delta-compressed
meta.writeLong(data.getFilePointer());
data.writeVInt(PackedInts.VERSION_CURRENT);
data.writeVInt(BLOCK_SIZE);
final BlockPackedWriter writer = new BlockPackedWriter(data, BLOCK_SIZE);
for (Number nv : values) {
writer.add(nv.longValue());
}
writer.finish();
}
@Override
public void write(
Directory directory,
SegmentInfo segmentInfo,
String segmentSuffix,
FieldInfos infos,
IOContext context)
throws IOException {
final String fileName =
IndexFileNames.segmentFileName(
segmentInfo.name, segmentSuffix, Lucene46FieldInfosFormat.EXTENSION);
try (IndexOutput output = directory.createOutput(fileName, context)) {
CodecUtil.writeHeader(
output, Lucene46FieldInfosFormat.CODEC_NAME, Lucene46FieldInfosFormat.FORMAT_CURRENT);
output.writeVInt(infos.size());
for (FieldInfo fi : infos) {
IndexOptions indexOptions = fi.getIndexOptions();
byte bits = 0x0;
if (fi.hasVectors()) bits |= Lucene46FieldInfosFormat.STORE_TERMVECTOR;
if (fi.omitsNorms()) bits |= Lucene46FieldInfosFormat.OMIT_NORMS;
if (fi.hasPayloads()) bits |= Lucene46FieldInfosFormat.STORE_PAYLOADS;
if (fi.getIndexOptions() != IndexOptions.NONE) {
bits |= Lucene46FieldInfosFormat.IS_INDEXED;
assert indexOptions.compareTo(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS) >= 0
|| !fi.hasPayloads();
if (indexOptions == IndexOptions.DOCS) {
bits |= Lucene46FieldInfosFormat.OMIT_TERM_FREQ_AND_POSITIONS;
} else if (indexOptions == IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS) {
bits |= Lucene46FieldInfosFormat.STORE_OFFSETS_IN_POSTINGS;
} else if (indexOptions == IndexOptions.DOCS_AND_FREQS) {
bits |= Lucene46FieldInfosFormat.OMIT_POSITIONS;
}
}
output.writeString(fi.name);
output.writeVInt(fi.number);
output.writeByte(bits);
// pack the DV types in one byte
final byte dv = docValuesByte(fi.getDocValuesType());
final byte nrm = docValuesByte(fi.hasNorms() ? DocValuesType.NUMERIC : DocValuesType.NONE);
assert (dv & (~0xF)) == 0 && (nrm & (~0x0F)) == 0;
byte val = (byte) (0xff & ((nrm << 4) | dv));
output.writeByte(val);
output.writeLong(fi.getDocValuesGen());
output.writeStringStringMap(fi.attributes());
}
CodecUtil.writeFooter(output);
}
}
@Override
public void start(IndexOutput termsOut) throws IOException {
this.termsOut = termsOut;
CodecUtil.writeHeader(termsOut, CODEC, VERSION_CURRENT);
termsOut.writeVInt(pending.length); // encode maxPositions in header
wrappedPostingsWriter.start(termsOut);
}
// encodes values as sparse array: keys[] and values[]
// access is log(N) where N = keys.length (slow!)
// so this is only appropriate as an exception table for patched, or when common value is 0 (wont
// be accessed by searching)
private void addIndirect(
FieldInfo field,
final Iterable<Number> values,
int count,
final NormMap uniqueValues,
final int minOrd)
throws IOException {
int commonCount = uniqueValues.freqs[minOrd];
meta.writeVInt(count - commonCount);
meta.writeByte(INDIRECT);
meta.writeLong(data.getFilePointer());
// write docs with value
writeDocsWithValue(values, uniqueValues, minOrd);
// write actual values
writeNormsField(
field,
new Iterable<Number>() {
@Override
public Iterator<Number> iterator() {
return new FilterIterator<Number, Number>(values.iterator()) {
@Override
protected boolean predicateFunction(Number value) {
return uniqueValues.ord(value.byteValue()) > minOrd;
}
};
}
},
1);
}
private void addUncompressed(Iterable<Number> values, int count) throws IOException {
meta.writeVInt(count);
meta.writeByte(UNCOMPRESSED); // uncompressed byte[]
meta.writeLong(data.getFilePointer());
for (Number nv : values) {
data.writeByte(nv.byteValue());
}
}
@Override
public void flushTermsBlock(int start, int count) throws IOException {
if (DEBUG)
System.out.println(
"PW: flushTermsBlock start="
+ start
+ " count="
+ count
+ " pendingTerms.size()="
+ pendingTerms.size());
int wrappedCount = 0;
assert buffer.getFilePointer() == 0;
assert start >= count;
final int limit = pendingTerms.size() - start + count;
for (int idx = pendingTerms.size() - start; idx < limit; idx++) {
final PendingTerm term = pendingTerms.get(idx);
if (term == null) {
wrappedCount++;
} else {
buffer.writeVInt(term.bytes.length);
buffer.writeBytes(term.bytes, 0, term.bytes.length);
}
}
termsOut.writeVInt((int) buffer.getFilePointer());
buffer.writeTo(termsOut);
buffer.reset();
// TDOO: this could be somewhat costly since
// pendingTerms.size() could be biggish?
int futureWrappedCount = 0;
final int limit2 = pendingTerms.size();
for (int idx = limit; idx < limit2; idx++) {
if (pendingTerms.get(idx) == null) {
futureWrappedCount++;
}
}
// Remove the terms we just wrote:
pendingTerms.subList(pendingTerms.size() - start, limit).clear();
if (DEBUG)
System.out.println(
"PW: len="
+ buffer.getFilePointer()
+ " fp="
+ termsOut.getFilePointer()
+ " futureWrappedCount="
+ futureWrappedCount
+ " wrappedCount="
+ wrappedCount);
// TODO: can we avoid calling this if all terms
// were inlined...? Eg for a "primary key" field, the
// wrapped codec is never invoked...
wrappedPostingsWriter.flushTermsBlock(futureWrappedCount + wrappedCount, wrappedCount);
}
private void addTableCompressed(
Iterable<Number> values, FormatAndBits compression, int count, NormMap uniqueValues)
throws IOException {
meta.writeVInt(count);
meta.writeByte(TABLE_COMPRESSED); // table-compressed
meta.writeLong(data.getFilePointer());
writeTable(values, compression, count, uniqueValues, uniqueValues.size);
}
private void writeDocsWithValue(final Iterable<Number> values, NormMap uniqueValues, int minOrd)
throws IOException {
data.writeLong(uniqueValues.values[minOrd]);
data.writeVInt(PackedInts.VERSION_CURRENT);
data.writeVInt(BLOCK_SIZE);
// write docs with value
final MonotonicBlockPackedWriter writer = new MonotonicBlockPackedWriter(data, BLOCK_SIZE);
int doc = 0;
for (Number n : values) {
int ord = uniqueValues.ord(n.byteValue());
if (ord > minOrd) {
writer.add(doc);
}
doc++;
}
writer.finish();
}
// encodes common values in a table, and the rest of the values as exceptions using INDIRECT.
// the exceptions should not be accessed very often, since the values are uncommon
private void addPatchedTable(
FieldInfo field,
final Iterable<Number> values,
final int numCommonValues,
int commonValuesCount,
int count,
final NormMap uniqueValues)
throws IOException {
meta.writeVInt(count);
meta.writeByte(PATCHED_TABLE);
meta.writeLong(data.getFilePointer());
assert numCommonValues == 3 || numCommonValues == 15;
FormatAndBits compression = fastestFormatAndBits(numCommonValues);
writeTable(values, compression, count, uniqueValues, numCommonValues);
meta.writeVInt(field.number);
addIndirect(field, values, count - commonValuesCount, uniqueValues, numCommonValues);
}
private void writeField() throws IOException {
// remember where this field is written
currentField.tvfPointer = tvf.getFilePointer();
// System.out.println("Field Pointer: " + currentField.tvfPointer);
final int size = terms.size();
tvf.writeVInt(size);
boolean storePositions = currentField.storePositions;
boolean storeOffsets = currentField.storeOffsets;
byte bits = 0x0;
if (storePositions) bits |= STORE_POSITIONS_WITH_TERMVECTOR;
if (storeOffsets) bits |= STORE_OFFSET_WITH_TERMVECTOR;
tvf.writeByte(bits);
String lastTermText = "";
for (int i = 0; i < size; i++) {
TVTerm term = (TVTerm) terms.elementAt(i);
int start = StringHelper.stringDifference(lastTermText, term.termText);
int length = term.termText.length() - start;
tvf.writeVInt(start); // write shared prefix length
tvf.writeVInt(length); // write delta length
tvf.writeChars(term.termText, start, length); // write delta chars
tvf.writeVInt(term.freq);
lastTermText = term.termText;
if (storePositions) {
if (term.positions == null)
throw new IllegalStateException("Trying to write positions that are null!");
// use delta encoding for positions
int position = 0;
for (int j = 0; j < term.freq; j++) {
tvf.writeVInt(term.positions[j] - position);
position = term.positions[j];
}
}
if (storeOffsets) {
if (term.offsets == null)
throw new IllegalStateException("Trying to write offsets that are null!");
// use delta encoding for offsets
int position = 0;
for (int j = 0; j < term.freq; j++) {
tvf.writeVInt(term.offsets[j].getStartOffset() - position);
tvf.writeVInt(
term.offsets[j].getEndOffset()
- term.offsets[j].getStartOffset()); // Save the diff between the two.
position = term.offsets[j].getEndOffset();
}
}
}
}
@Override
public void finish() throws IOException {
if (finished) {
throw new IllegalStateException("already finished");
}
finished = true;
CodecUtil.writeFooter(dataOut);
String indexFileName =
IndexFileNames.segmentFileName(
writeState.segmentInfo.name,
writeState.segmentSuffix,
Lucene60PointsFormat.INDEX_EXTENSION);
// Write index file
try (IndexOutput indexOut =
writeState.directory.createOutput(indexFileName, writeState.context)) {
CodecUtil.writeIndexHeader(
indexOut,
Lucene60PointsFormat.META_CODEC_NAME,
Lucene60PointsFormat.INDEX_VERSION_CURRENT,
writeState.segmentInfo.getId(),
writeState.segmentSuffix);
int count = indexFPs.size();
indexOut.writeVInt(count);
for (Map.Entry<String, Long> ent : indexFPs.entrySet()) {
FieldInfo fieldInfo = writeState.fieldInfos.fieldInfo(ent.getKey());
if (fieldInfo == null) {
throw new IllegalStateException(
"wrote field=\"" + ent.getKey() + "\" but that field doesn't exist in FieldInfos");
}
indexOut.writeVInt(fieldInfo.number);
indexOut.writeVLong(ent.getValue());
}
CodecUtil.writeFooter(indexOut);
}
}
// encodes only uncommon values in a sparse bitset
// access is constant time, and the common case is predictable
// exceptions nest either to CONST (if there are only 2 values), or INDIRECT (if there are > 2
// values)
private void addPatchedBitset(
FieldInfo field, final Iterable<Number> values, int count, NormMap uniqueValues)
throws IOException {
int commonCount = uniqueValues.freqs[0];
meta.writeVInt(count - commonCount);
meta.writeByte(PATCHED_BITSET);
meta.writeLong(data.getFilePointer());
// write docs with value
writeDocsWithValue(values, uniqueValues, 0);
// write exceptions: only two cases make sense
// bpv = 1 (folded into sparse bitset already)
// bpv > 1 (add indirect exception table)
meta.writeVInt(field.number);
if (uniqueValues.size == 2) {
// special case: implicit in bitset
addConstant(uniqueValues.values[1]);
} else {
// exception table
addIndirect(field, values, count, uniqueValues, 0);
}
}
@Override
public void close() throws IOException {
boolean success = false;
try {
if (meta != null) {
meta.writeVInt(-1); // write EOF marker
CodecUtil.writeFooter(meta); // write checksum
}
if (data != null) {
CodecUtil.writeFooter(data); // write checksum
}
success = true;
} finally {
if (success) {
IOUtils.close(data, meta);
} else {
IOUtils.closeWhileHandlingException(data, meta);
}
meta = data = null;
}
}
/**
* Called once per field per document if term vectors are enabled, to write the vectors to
* RAMOutputStream, which is then quickly flushed to the real term vectors files in the Directory.
*/
@Override
void finish() throws IOException {
assert docState.testPoint("TermVectorsTermsWriterPerField.finish start");
final int numPostings = termsHashPerField.bytesHash.size();
final BytesRef flushTerm = perThread.flushTerm;
assert numPostings >= 0;
if (!doVectors || numPostings == 0) return;
if (numPostings > maxNumPostings) maxNumPostings = numPostings;
final IndexOutput tvf = perThread.doc.perDocTvf;
// This is called once, after inverting all occurrences
// of a given field in the doc. At this point we flush
// our hash into the DocWriter.
assert fieldInfo.storeTermVector;
assert perThread.vectorFieldsInOrder(fieldInfo);
perThread.doc.addField(termsHashPerField.fieldInfo.number);
TermVectorsPostingsArray postings = (TermVectorsPostingsArray) termsHashPerField.postingsArray;
// TODO: we may want to make this sort in same order
// as Codec's terms dict?
final int[] termIDs =
termsHashPerField.sortPostings(BytesRef.getUTF8SortedAsUnicodeComparator());
tvf.writeVInt(numPostings);
byte bits = 0x0;
if (doVectorPositions) bits |= TermVectorsReader.STORE_POSITIONS_WITH_TERMVECTOR;
if (doVectorOffsets) bits |= TermVectorsReader.STORE_OFFSET_WITH_TERMVECTOR;
tvf.writeByte(bits);
int lastLen = 0;
byte[] lastBytes = null;
int lastStart = 0;
final ByteSliceReader reader = perThread.vectorSliceReader;
final ByteBlockPool termBytePool = perThread.termsHashPerThread.termBytePool;
for (int j = 0; j < numPostings; j++) {
final int termID = termIDs[j];
final int freq = postings.freqs[termID];
// Get BytesRef
termBytePool.setBytesRef(flushTerm, postings.textStarts[termID]);
// Compute common byte prefix between last term and
// this term
int prefix = 0;
if (j > 0) {
while (prefix < lastLen && prefix < flushTerm.length) {
if (lastBytes[lastStart + prefix] != flushTerm.bytes[flushTerm.offset + prefix]) {
break;
}
prefix++;
}
}
lastLen = flushTerm.length;
lastBytes = flushTerm.bytes;
lastStart = flushTerm.offset;
final int suffix = flushTerm.length - prefix;
tvf.writeVInt(prefix);
tvf.writeVInt(suffix);
tvf.writeBytes(flushTerm.bytes, lastStart + prefix, suffix);
tvf.writeVInt(freq);
if (doVectorPositions) {
termsHashPerField.initReader(reader, termID, 0);
reader.writeTo(tvf);
}
if (doVectorOffsets) {
termsHashPerField.initReader(reader, termID, 1);
reader.writeTo(tvf);
}
}
termsHashPerField.reset();
// NOTE: we clear, per-field, at the thread level,
// because term vectors fully write themselves on each
// field; this saves RAM (eg if large doc has two large
// fields w/ term vectors on) because we recycle/reuse
// all RAM after each field:
perThread.termsHashPerThread.reset(false);
}
private void writeNormsField(FieldInfo field, Iterable<Number> values, int level)
throws IOException {
assert level <= 1; // we only "recurse" once in the indirect case
meta.writeVInt(field.number);
NormMap uniqueValues = new NormMap();
int count = 0;
for (Number nv : values) {
if (nv == null) {
throw new IllegalStateException(
"illegal norms data for field " + field.name + ", got null for value: " + count);
}
final long v = nv.longValue();
if (uniqueValues != null) {
if (v >= Byte.MIN_VALUE && v <= Byte.MAX_VALUE) {
if (uniqueValues.add((byte) v)) {
if (uniqueValues.size > 256) {
uniqueValues = null;
}
}
} else {
// anything outside an 8 bit float comes from a custom scorer, which is an extreme edge
// case
uniqueValues = null;
}
}
count++;
}
if (uniqueValues == null) {
addDeltaCompressed(values, count);
} else if (uniqueValues.size == 1) {
// 0 bpv
addConstant(uniqueValues.values[0]);
} else {
// small number of unique values: this is the typical case
uniqueValues.optimizeOrdinals();
int numCommonValues = -1;
int commonValuesCount = 0;
if (level == 0 && count > 256) {
float threshold_count = count * INDIRECT_THRESHOLD;
if (uniqueValues.freqs[0] > threshold_count) {
numCommonValues = 1;
} else if ((commonValuesCount = sum(uniqueValues.freqs, 0, 3)) > threshold_count
&& uniqueValues.size > 4) {
numCommonValues = 3;
} else if ((commonValuesCount = sum(uniqueValues.freqs, 0, 15)) > threshold_count
&& uniqueValues.size > 16) {
numCommonValues = 15;
}
}
if (numCommonValues == -1) {
// no pattern in values, just find the most efficient way to pack the values
FormatAndBits compression = fastestFormatAndBits(uniqueValues.size - 1);
if (compression.bitsPerValue == 8) {
addUncompressed(values, count);
} else {
addTableCompressed(values, compression, count, uniqueValues);
}
} else if (numCommonValues == 1) {
byte commonValue = uniqueValues.values[0];
if (commonValue == 0) {
// if the common value is missing, don't waste RAM on a bitset, since we won't be
// searching those docs
addIndirect(field, values, count, uniqueValues, 0);
} else {
// otherwise, write a sparse bitset, where 1 indicates 'uncommon value'.
addPatchedBitset(field, values, count, uniqueValues);
}
} else {
addPatchedTable(field, values, numCommonValues, commonValuesCount, count, uniqueValues);
}
}
}
@Override
protected void writeSkipData(int level, IndexOutput skipBuffer) throws IOException {
// To efficiently store payloads/offsets in the posting lists we do not store the length of
// every payload/offset. Instead we omit the length if the previous lengths were the same
//
// However, in order to support skipping, the length at every skip point must be known.
// So we use the same length encoding that we use for the posting lists for the skip data as
// well:
// Case 1: current field does not store payloads/offsets
// SkipDatum --> DocSkip, FreqSkip, ProxSkip
// DocSkip,FreqSkip,ProxSkip --> VInt
// DocSkip records the document number before every SkipInterval th document in
// TermFreqs.
// Document numbers are represented as differences from the previous value in the
// sequence.
// Case 2: current field stores payloads/offsets
// SkipDatum --> DocSkip,
// PayloadLength?,OffsetLength?,FreqSkip,ProxSkip
// DocSkip,FreqSkip,ProxSkip --> VInt
// PayloadLength,OffsetLength--> VInt
// In this case DocSkip/2 is the difference between
// the current and the previous value. If DocSkip
// is odd, then a PayloadLength encoded as VInt follows,
// if DocSkip is even, then it is assumed that the
// current payload/offset lengths equals the lengths at the previous
// skip point
int delta = curDoc - lastSkipDoc[level];
if (curStorePayloads || curStoreOffsets) {
assert curStorePayloads || curPayloadLength == lastSkipPayloadLength[level];
assert curStoreOffsets || curOffsetLength == lastSkipOffsetLength[level];
if (curPayloadLength == lastSkipPayloadLength[level]
&& curOffsetLength == lastSkipOffsetLength[level]) {
// the current payload/offset lengths equals the lengths at the previous skip point,
// so we don't store the lengths again
skipBuffer.writeVInt(delta << 1);
} else {
// the payload and/or offset length is different from the previous one. We shift the
// DocSkip,
// set the lowest bit and store the current payload and/or offset lengths as VInts.
skipBuffer.writeVInt(delta << 1 | 1);
if (curStorePayloads) {
skipBuffer.writeVInt(curPayloadLength);
lastSkipPayloadLength[level] = curPayloadLength;
}
if (curStoreOffsets) {
skipBuffer.writeVInt(curOffsetLength);
lastSkipOffsetLength[level] = curOffsetLength;
}
}
} else {
// current field does not store payloads or offsets
skipBuffer.writeVInt(delta);
}
skipBuffer.writeVLong(curFreqPointer - lastSkipFreqPointer[level]);
skipBuffer.writeVLong(curProxPointer - lastSkipProxPointer[level]);
lastSkipDoc[level] = curDoc;
lastSkipFreqPointer[level] = curFreqPointer;
lastSkipProxPointer[level] = curProxPointer;
}
private void addConstant(byte constant) throws IOException {
meta.writeVInt(0);
meta.writeByte(CONST_COMPRESSED);
meta.writeLong(constant);
}
private void write(Directory directory) throws IOException {
long nextGeneration = getNextPendingGeneration();
String segmentFileName =
IndexFileNames.fileNameFromGeneration(IndexFileNames.PENDING_SEGMENTS, "", nextGeneration);
// Always advance the generation on write:
generation = nextGeneration;
IndexOutput segnOutput = null;
boolean success = false;
try {
segnOutput = directory.createOutput(segmentFileName, IOContext.DEFAULT);
CodecUtil.writeIndexHeader(
segnOutput,
"segments",
VERSION_CURRENT,
StringHelper.randomId(),
Long.toString(nextGeneration, Character.MAX_RADIX));
segnOutput.writeVInt(Version.LATEST.major);
segnOutput.writeVInt(Version.LATEST.minor);
segnOutput.writeVInt(Version.LATEST.bugfix);
segnOutput.writeLong(version);
segnOutput.writeInt(counter); // write counter
segnOutput.writeInt(size());
if (size() > 0) {
Version minSegmentVersion = null;
// We do a separate loop up front so we can write the minSegmentVersion before
// any SegmentInfo; this makes it cleaner to throw IndexFormatTooOldExc at read time:
for (SegmentCommitInfo siPerCommit : this) {
Version segmentVersion = siPerCommit.info.getVersion();
if (minSegmentVersion == null || segmentVersion.onOrAfter(minSegmentVersion) == false) {
minSegmentVersion = segmentVersion;
}
}
segnOutput.writeVInt(minSegmentVersion.major);
segnOutput.writeVInt(minSegmentVersion.minor);
segnOutput.writeVInt(minSegmentVersion.bugfix);
}
// write infos
for (SegmentCommitInfo siPerCommit : this) {
SegmentInfo si = siPerCommit.info;
segnOutput.writeString(si.name);
byte segmentID[] = si.getId();
// TODO: remove this in lucene 6, we don't need to include 4.x segments in commits anymore
if (segmentID == null) {
segnOutput.writeByte((byte) 0);
} else {
if (segmentID.length != StringHelper.ID_LENGTH) {
throw new IllegalStateException(
"cannot write segment: invalid id segment="
+ si.name
+ "id="
+ StringHelper.idToString(segmentID));
}
segnOutput.writeByte((byte) 1);
segnOutput.writeBytes(segmentID, segmentID.length);
}
segnOutput.writeString(si.getCodec().getName());
segnOutput.writeLong(siPerCommit.getDelGen());
int delCount = siPerCommit.getDelCount();
if (delCount < 0 || delCount > si.maxDoc()) {
throw new IllegalStateException(
"cannot write segment: invalid maxDoc segment="
+ si.name
+ " maxDoc="
+ si.maxDoc()
+ " delCount="
+ delCount);
}
segnOutput.writeInt(delCount);
segnOutput.writeLong(siPerCommit.getFieldInfosGen());
segnOutput.writeLong(siPerCommit.getDocValuesGen());
segnOutput.writeSetOfStrings(siPerCommit.getFieldInfosFiles());
final Map<Integer, Set<String>> dvUpdatesFiles = siPerCommit.getDocValuesUpdatesFiles();
segnOutput.writeInt(dvUpdatesFiles.size());
for (Entry<Integer, Set<String>> e : dvUpdatesFiles.entrySet()) {
segnOutput.writeInt(e.getKey());
segnOutput.writeSetOfStrings(e.getValue());
}
}
segnOutput.writeMapOfStrings(userData);
CodecUtil.writeFooter(segnOutput);
segnOutput.close();
directory.sync(Collections.singleton(segmentFileName));
success = true;
} finally {
if (success) {
pendingCommit = true;
} else {
// We hit an exception above; try to close the file
// but suppress any exception:
IOUtils.closeWhileHandlingException(segnOutput);
// Try not to leave a truncated segments_N file in
// the index:
IOUtils.deleteFilesIgnoringExceptions(directory, segmentFileName);
}
}
}
