/*
* 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.index;
import java.io.IOException;
import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
import org.apache.lucene.analysis.tokenattributes.PayloadAttribute;
import org.apache.lucene.codecs.TermVectorsWriter;
import org.apache.lucene.util.BytesRef;
final class TermVectorsConsumerPerField extends TermsHashPerField {
private TermVectorsPostingsArray termVectorsPostingsArray;
final TermVectorsConsumer termsWriter;
boolean doVectors;
boolean doVectorPositions;
boolean doVectorOffsets;
boolean doVectorPayloads;
OffsetAttribute offsetAttribute;
PayloadAttribute payloadAttribute;
boolean hasPayloads; // if enabled, and we actually saw any for this field
public TermVectorsConsumerPerField(FieldInvertState invertState, TermVectorsConsumer termsWriter, FieldInfo fieldInfo) {
super(2, invertState, termsWriter, null, fieldInfo);
this.termsWriter = termsWriter;
}
/** 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() {
if (!doVectors || bytesHash.size() == 0) {
return;
}
termsWriter.addFieldToFlush(this);
}
void finishDocument() throws IOException {
if (doVectors == false) {
return;
}
doVectors = false;
final int numPostings = bytesHash.size();
final BytesRef flushTerm = termsWriter.flushTerm;
assert numPostings >= 0;
// 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.
TermVectorsPostingsArray postings = termVectorsPostingsArray;
final TermVectorsWriter tv = termsWriter.writer;
final int[] termIDs = sortPostings();
tv.startField(fieldInfo, numPostings, doVectorPositions, doVectorOffsets, hasPayloads);
final ByteSliceReader posReader = doVectorPositions ? termsWriter.vectorSliceReaderPos : null;
final ByteSliceReader offReader = doVectorOffsets ? termsWriter.vectorSliceReaderOff : null;
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]);
tv.startTerm(flushTerm, freq);
if (doVectorPositions || doVectorOffsets) {
if (posReader != null) {
initReader(posReader, termID, 0);
}
if (offReader != null) {
initReader(offReader, termID, 1);
}
tv.addProx(freq, posReader, offReader);
}
tv.finishTerm();
}
tv.finishField();
reset();
fieldInfo.setStoreTermVectors();
}
@Override
boolean start(IndexableField field, boolean first) {
assert field.fieldType().indexOptions() != IndexOptions.NONE;
if (first) {
if (bytesHash.size() != 0) {
// Only necessary if previous doc hit a
// non-aborting exception while writing vectors in
// this field:
reset();
}
bytesHash.reinit();
hasPayloads = false;
doVectors = field.fieldType().storeTermVectors();
if (doVectors) {
termsWriter.hasVectors = true;
doVectorPositions = field.fieldType().storeTermVectorPositions();
// Somewhat confusingly, unlike postings, you are
// allowed to index TV offsets without TV positions:
doVectorOffsets = field.fieldType().storeTermVectorOffsets();
if (doVectorPositions) {
doVectorPayloads = field.fieldType().storeTermVectorPayloads();
} else {
doVectorPayloads = false;
if (field.fieldType().storeTermVectorPayloads()) {
// TODO: move this check somewhere else, and impl the other missing ones
throw new IllegalArgumentException("cannot index term vector payloads without term vector positions (field=\"" + field.name() + "\")");
}
}
} else {
if (field.fieldType().storeTermVectorOffsets()) {
throw new IllegalArgumentException("cannot index term vector offsets when term vectors are not indexed (field=\"" + field.name() + "\")");
}
if (field.fieldType().storeTermVectorPositions()) {
throw new IllegalArgumentException("cannot index term vector positions when term vectors are not indexed (field=\"" + field.name() + "\")");
}
if (field.fieldType().storeTermVectorPayloads()) {
throw new IllegalArgumentException("cannot index term vector payloads when term vectors are not indexed (field=\"" + field.name() + "\")");
}
}
} else {
if (doVectors != field.fieldType().storeTermVectors()) {
throw new IllegalArgumentException("all instances of a given field name must have the same term vectors settings (storeTermVectors changed for field=\"" + field.name() + "\")");
}
if (doVectorPositions != field.fieldType().storeTermVectorPositions()) {
throw new IllegalArgumentException("all instances of a given field name must have the same term vectors settings (storeTermVectorPositions changed for field=\"" + field.name() + "\")");
}
if (doVectorOffsets != field.fieldType().storeTermVectorOffsets()) {
throw new IllegalArgumentException("all instances of a given field name must have the same term vectors settings (storeTermVectorOffsets changed for field=\"" + field.name() + "\")");
}
if (doVectorPayloads != field.fieldType().storeTermVectorPayloads()) {
throw new IllegalArgumentException("all instances of a given field name must have the same term vectors settings (storeTermVectorPayloads changed for field=\"" + field.name() + "\")");
}
}
if (doVectors) {
if (doVectorOffsets) {
offsetAttribute = fieldState.offsetAttribute;
assert offsetAttribute != null;
}
if (doVectorPayloads) {
// Can be null:
payloadAttribute = fieldState.payloadAttribute;
} else {
payloadAttribute = null;
}
}
return doVectors;
}
void writeProx(TermVectorsPostingsArray postings, int termID) {
if (doVectorOffsets) {
int startOffset = fieldState.offset + offsetAttribute.startOffset();
int endOffset = fieldState.offset + offsetAttribute.endOffset();
writeVInt(1, startOffset - postings.lastOffsets[termID]);
writeVInt(1, endOffset - startOffset);
postings.lastOffsets[termID] = endOffset;
}
if (doVectorPositions) {
final BytesRef payload;
if (payloadAttribute == null) {
payload = null;
} else {
payload = payloadAttribute.getPayload();
}
final int pos = fieldState.position - postings.lastPositions[termID];
if (payload != null && payload.length > 0) {
writeVInt(0, (pos<<1)|1);
writeVInt(0, payload.length);
writeBytes(0, payload.bytes, payload.offset, payload.length);
hasPayloads = true;
} else {
writeVInt(0, pos<<1);
}
postings.lastPositions[termID] = fieldState.position;
}
}
@Override
void newTerm(final int termID) {
TermVectorsPostingsArray postings = termVectorsPostingsArray;
postings.freqs[termID] = 1;
postings.lastOffsets[termID] = 0;
postings.lastPositions[termID] = 0;
writeProx(postings, termID);
}
@Override
void addTerm(final int termID) {
TermVectorsPostingsArray postings = termVectorsPostingsArray;
postings.freqs[termID]++;
writeProx(postings, termID);
}
@Override
public void newPostingsArray() {
termVectorsPostingsArray = (TermVectorsPostingsArray) postingsArray;
}
@Override
ParallelPostingsArray createPostingsArray(int size) {
return new TermVectorsPostingsArray(size);
}
static final class TermVectorsPostingsArray extends ParallelPostingsArray {
public TermVectorsPostingsArray(int size) {
super(size);
freqs = new int[size];
lastOffsets = new int[size];
lastPositions = new int[size];
}
int[] freqs; // How many times this term occurred in the current doc
int[] lastOffsets; // Last offset we saw
int[] lastPositions; // Last position where this term occurred
@Override
ParallelPostingsArray newInstance(int size) {
return new TermVectorsPostingsArray(size);
}
@Override
void copyTo(ParallelPostingsArray toArray, int numToCopy) {
assert toArray instanceof TermVectorsPostingsArray;
TermVectorsPostingsArray to = (TermVectorsPostingsArray) toArray;
super.copyTo(toArray, numToCopy);
System.arraycopy(freqs, 0, to.freqs, 0, size);
System.arraycopy(lastOffsets, 0, to.lastOffsets, 0, size);
System.arraycopy(lastPositions, 0, to.lastPositions, 0, size);
}
@Override
int bytesPerPosting() {
return super.bytesPerPosting() + 3 * Integer.BYTES;
}
}
}