package org.apache.lucene.codecs.memory;
/*
* 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.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.lucene.codecs.CodecUtil;
import org.apache.lucene.codecs.DocValuesProducer;
import org.apache.lucene.index.BinaryDocValues;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.FieldInfo;
import org.apache.lucene.index.IndexFileNames;
import org.apache.lucene.index.NumericDocValues;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.index.SortedDocValues;
import org.apache.lucene.index.SortedSetDocValues;
import org.apache.lucene.store.IndexInput;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.FixedBitSet;
import org.apache.lucene.util.IOUtils;
import org.apache.lucene.util.RamUsageEstimator;
/**
* Reader for {@link DirectDocValuesFormat}
*/
class DirectDocValuesProducer extends DocValuesProducer {
// metadata maps (just file pointers and minimal stuff)
private final Map<Integer,NumericEntry> numerics = new HashMap<Integer,NumericEntry>();
private final Map<Integer,BinaryEntry> binaries = new HashMap<Integer,BinaryEntry>();
private final Map<Integer,SortedEntry> sorteds = new HashMap<Integer,SortedEntry>();
private final Map<Integer,SortedSetEntry> sortedSets = new HashMap<Integer,SortedSetEntry>();
private final IndexInput data;
// ram instances we have already loaded
private final Map<Integer,NumericDocValues> numericInstances =
new HashMap<Integer,NumericDocValues>();
private final Map<Integer,BinaryDocValues> binaryInstances =
new HashMap<Integer,BinaryDocValues>();
private final Map<Integer,SortedDocValues> sortedInstances =
new HashMap<Integer,SortedDocValues>();
private final Map<Integer,SortedSetRawValues> sortedSetInstances =
new HashMap<Integer,SortedSetRawValues>();
private final Map<Integer,Bits> docsWithFieldInstances = new HashMap<Integer,Bits>();
private final int maxDoc;
private final AtomicLong ramBytesUsed;
static final byte NUMBER = 0;
static final byte BYTES = 1;
static final byte SORTED = 2;
static final byte SORTED_SET = 3;
static final int VERSION_START = 0;
static final int VERSION_CURRENT = VERSION_START;
DirectDocValuesProducer(SegmentReadState state, String dataCodec, String dataExtension, String metaCodec, String metaExtension) throws IOException {
maxDoc = state.segmentInfo.getDocCount();
String metaName = IndexFileNames.segmentFileName(state.segmentInfo.name, state.segmentSuffix, metaExtension);
// read in the entries from the metadata file.
IndexInput in = state.directory.openInput(metaName, state.context);
ramBytesUsed = new AtomicLong(RamUsageEstimator.shallowSizeOfInstance(getClass()));
boolean success = false;
final int version;
try {
version = CodecUtil.checkHeader(in, metaCodec,
VERSION_START,
VERSION_CURRENT);
readFields(in);
success = true;
} finally {
if (success) {
IOUtils.close(in);
} else {
IOUtils.closeWhileHandlingException(in);
}
}
success = false;
try {
String dataName = IndexFileNames.segmentFileName(state.segmentInfo.name, state.segmentSuffix, dataExtension);
data = state.directory.openInput(dataName, state.context);
final int version2 = CodecUtil.checkHeader(data, dataCodec,
VERSION_START,
VERSION_CURRENT);
if (version != version2) {
throw new CorruptIndexException("Format versions mismatch");
}
success = true;
} finally {
if (!success) {
IOUtils.closeWhileHandlingException(this.data);
}
}
}
private NumericEntry readNumericEntry(IndexInput meta) throws IOException {
NumericEntry entry = new NumericEntry();
entry.offset = meta.readLong();
entry.count = meta.readInt();
entry.missingOffset = meta.readLong();
if (entry.missingOffset != -1) {
entry.missingBytes = meta.readLong();
} else {
entry.missingBytes = 0;
}
entry.byteWidth = meta.readByte();
return entry;
}
private BinaryEntry readBinaryEntry(IndexInput meta) throws IOException {
BinaryEntry entry = new BinaryEntry();
entry.offset = meta.readLong();
entry.numBytes = meta.readInt();
entry.count = meta.readInt();
entry.missingOffset = meta.readLong();
if (entry.missingOffset != -1) {
entry.missingBytes = meta.readLong();
} else {
entry.missingBytes = 0;
}
return entry;
}
private SortedEntry readSortedEntry(IndexInput meta) throws IOException {
SortedEntry entry = new SortedEntry();
entry.docToOrd = readNumericEntry(meta);
entry.values = readBinaryEntry(meta);
return entry;
}
private SortedSetEntry readSortedSetEntry(IndexInput meta) throws IOException {
SortedSetEntry entry = new SortedSetEntry();
entry.docToOrdAddress = readNumericEntry(meta);
entry.ords = readNumericEntry(meta);
entry.values = readBinaryEntry(meta);
return entry;
}
private void readFields(IndexInput meta) throws IOException {
int fieldNumber = meta.readVInt();
while (fieldNumber != -1) {
int fieldType = meta.readByte();
if (fieldType == NUMBER) {
numerics.put(fieldNumber, readNumericEntry(meta));
} else if (fieldType == BYTES) {
binaries.put(fieldNumber, readBinaryEntry(meta));
} else if (fieldType == SORTED) {
sorteds.put(fieldNumber, readSortedEntry(meta));
} else if (fieldType == SORTED_SET) {
sortedSets.put(fieldNumber, readSortedSetEntry(meta));
} else {
throw new CorruptIndexException("invalid entry type: " + fieldType + ", input=" + meta);
}
fieldNumber = meta.readVInt();
}
}
@Override
public long ramBytesUsed() {
return ramBytesUsed.get();
}
@Override
public synchronized NumericDocValues getNumeric(FieldInfo field) throws IOException {
NumericDocValues instance = numericInstances.get(field.number);
if (instance == null) {
// Lazy load
instance = loadNumeric(numerics.get(field.number));
numericInstances.put(field.number, instance);
}
return instance;
}
private NumericDocValues loadNumeric(NumericEntry entry) throws IOException {
data.seek(entry.offset + entry.missingBytes);
switch (entry.byteWidth) {
case 1:
{
final byte[] values = new byte[entry.count];
data.readBytes(values, 0, entry.count);
ramBytesUsed.addAndGet(RamUsageEstimator.sizeOf(values));
return new NumericDocValues() {
@Override
public long get(int idx) {
return values[idx];
}
};
}
case 2:
{
final short[] values = new short[entry.count];
for(int i=0;i<entry.count;i++) {
values[i] = data.readShort();
}
ramBytesUsed.addAndGet(RamUsageEstimator.sizeOf(values));
return new NumericDocValues() {
@Override
public long get(int idx) {
return values[idx];
}
};
}
case 4:
{
final int[] values = new int[entry.count];
for(int i=0;i<entry.count;i++) {
values[i] = data.readInt();
}
ramBytesUsed.addAndGet(RamUsageEstimator.sizeOf(values));
return new NumericDocValues() {
@Override
public long get(int idx) {
return values[idx];
}
};
}
case 8:
{
final long[] values = new long[entry.count];
for(int i=0;i<entry.count;i++) {
values[i] = data.readLong();
}
ramBytesUsed.addAndGet(RamUsageEstimator.sizeOf(values));
return new NumericDocValues() {
@Override
public long get(int idx) {
return values[idx];
}
};
}
default:
throw new AssertionError();
}
}
@Override
public synchronized BinaryDocValues getBinary(FieldInfo field) throws IOException {
BinaryDocValues instance = binaryInstances.get(field.number);
if (instance == null) {
// Lazy load
instance = loadBinary(binaries.get(field.number));
binaryInstances.put(field.number, instance);
}
return instance;
}
private BinaryDocValues loadBinary(BinaryEntry entry) throws IOException {
data.seek(entry.offset);
final byte[] bytes = new byte[entry.numBytes];
data.readBytes(bytes, 0, entry.numBytes);
data.seek(entry.offset + entry.numBytes + entry.missingBytes);
final int[] address = new int[entry.count+1];
for(int i=0;i<entry.count;i++) {
address[i] = data.readInt();
}
address[entry.count] = data.readInt();
ramBytesUsed.addAndGet(RamUsageEstimator.sizeOf(bytes) + RamUsageEstimator.sizeOf(address));
return new BinaryDocValues() {
@Override
public void get(int docID, BytesRef result) {
result.bytes = bytes;
result.offset = address[docID];
result.length = address[docID+1] - result.offset;
};
};
}
@Override
public synchronized SortedDocValues getSorted(FieldInfo field) throws IOException {
SortedDocValues instance = sortedInstances.get(field.number);
if (instance == null) {
// Lazy load
instance = loadSorted(field);
sortedInstances.put(field.number, instance);
}
return instance;
}
private SortedDocValues loadSorted(FieldInfo field) throws IOException {
final SortedEntry entry = sorteds.get(field.number);
final NumericDocValues docToOrd = loadNumeric(entry.docToOrd);
final BinaryDocValues values = loadBinary(entry.values);
return new SortedDocValues() {
@Override
public int getOrd(int docID) {
return (int) docToOrd.get(docID);
}
@Override
public void lookupOrd(int ord, BytesRef result) {
values.get(ord, result);
}
@Override
public int getValueCount() {
return entry.values.count;
}
// Leave lookupTerm to super's binary search
// Leave termsEnum to super
};
}
@Override
public synchronized SortedSetDocValues getSortedSet(FieldInfo field) throws IOException {
SortedSetRawValues instance = sortedSetInstances.get(field.number);
final SortedSetEntry entry = sortedSets.get(field.number);
if (instance == null) {
// Lazy load
instance = loadSortedSet(entry);
sortedSetInstances.put(field.number, instance);
}
final NumericDocValues docToOrdAddress = instance.docToOrdAddress;
final NumericDocValues ords = instance.ords;
final BinaryDocValues values = instance.values;
// Must make a new instance since the iterator has state:
return new SortedSetDocValues() {
int ordUpto;
int ordLimit;
@Override
public long nextOrd() {
if (ordUpto == ordLimit) {
return NO_MORE_ORDS;
} else {
return ords.get(ordUpto++);
}
}
@Override
public void setDocument(int docID) {
ordUpto = (int) docToOrdAddress.get(docID);
ordLimit = (int) docToOrdAddress.get(docID+1);
}
@Override
public void lookupOrd(long ord, BytesRef result) {
values.get((int) ord, result);
}
@Override
public long getValueCount() {
return entry.values.count;
}
// Leave lookupTerm to super's binary search
// Leave termsEnum to super
};
}
private SortedSetRawValues loadSortedSet(SortedSetEntry entry) throws IOException {
SortedSetRawValues instance = new SortedSetRawValues();
instance.docToOrdAddress = loadNumeric(entry.docToOrdAddress);
instance.ords = loadNumeric(entry.ords);
instance.values = loadBinary(entry.values);
return instance;
}
private Bits getMissingBits(int fieldNumber, final long offset, final long length) throws IOException {
if (offset == -1) {
return new Bits.MatchAllBits(maxDoc);
} else {
Bits instance;
synchronized(this) {
instance = docsWithFieldInstances.get(fieldNumber);
if (instance == null) {
IndexInput data = this.data.clone();
data.seek(offset);
assert length % 8 == 0;
long bits[] = new long[(int) length >> 3];
for (int i = 0; i < bits.length; i++) {
bits[i] = data.readLong();
}
instance = new FixedBitSet(bits, maxDoc);
docsWithFieldInstances.put(fieldNumber, instance);
}
}
return instance;
}
}
@Override
public Bits getDocsWithField(FieldInfo field) throws IOException {
switch(field.getDocValuesType()) {
case SORTED_SET:
return new SortedSetDocsWithField(getSortedSet(field), maxDoc);
case SORTED:
return new SortedDocsWithField(getSorted(field), maxDoc);
case BINARY:
BinaryEntry be = binaries.get(field.number);
return getMissingBits(field.number, be.missingOffset, be.missingBytes);
case NUMERIC:
NumericEntry ne = numerics.get(field.number);
return getMissingBits(field.number, ne.missingOffset, ne.missingBytes);
default:
throw new AssertionError();
}
}
@Override
public void close() throws IOException {
data.close();
}
static class SortedSetRawValues {
NumericDocValues docToOrdAddress;
NumericDocValues ords;
BinaryDocValues values;
}
static class NumericEntry {
long offset;
int count;
long missingOffset;
long missingBytes;
byte byteWidth;
int packedIntsVersion;
}
static class BinaryEntry {
long offset;
long missingOffset;
long missingBytes;
int count;
int numBytes;
int minLength;
int maxLength;
int packedIntsVersion;
int blockSize;
}
static class SortedEntry {
NumericEntry docToOrd;
BinaryEntry values;
}
static class SortedSetEntry {
NumericEntry docToOrdAddress;
NumericEntry ords;
BinaryEntry values;
}
static class FSTEntry {
long offset;
long numOrds;
}
}