org.elasticsearch.index.fielddata.fieldcomparator.LongValuesComparatorSource Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :distribution:archives:integ-test-zip
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.index.fielddata.fieldcomparator;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.NumericDocValues;
import org.apache.lucene.index.SortedNumericDocValues;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.search.FieldComparator;
import org.apache.lucene.search.LeafFieldComparator;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.comparators.LongComparator;
import org.apache.lucene.util.BitSet;
import org.elasticsearch.common.time.DateUtils;
import org.elasticsearch.common.util.BigArrays;
import org.elasticsearch.core.Nullable;
import org.elasticsearch.index.fielddata.FieldData;
import org.elasticsearch.index.fielddata.IndexFieldData;
import org.elasticsearch.index.fielddata.IndexNumericFieldData;
import org.elasticsearch.index.fielddata.IndexNumericFieldData.NumericType;
import org.elasticsearch.index.fielddata.LeafNumericFieldData;
import org.elasticsearch.index.fielddata.plain.SortedNumericIndexFieldData;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.MultiValueMode;
import org.elasticsearch.search.sort.BucketedSort;
import org.elasticsearch.search.sort.SortOrder;
import java.io.IOException;
import java.util.function.Function;
/**
* Comparator source for long values.
*/
public class LongValuesComparatorSource extends IndexFieldData.XFieldComparatorSource {
private final IndexNumericFieldData indexFieldData;
private final Function converter;
private final NumericType targetNumericType;
public LongValuesComparatorSource(
IndexNumericFieldData indexFieldData,
@Nullable Object missingValue,
MultiValueMode sortMode,
Nested nested,
NumericType targetNumericType
) {
this(indexFieldData, missingValue, sortMode, nested, null, targetNumericType);
}
public LongValuesComparatorSource(
IndexNumericFieldData indexFieldData,
@Nullable Object missingValue,
MultiValueMode sortMode,
Nested nested,
Function converter,
NumericType targetNumericType
) {
super(missingValue, sortMode, nested);
this.indexFieldData = indexFieldData;
this.converter = converter;
this.targetNumericType = targetNumericType;
}
@Override
public SortField.Type reducedType() {
return SortField.Type.LONG;
}
private SortedNumericDocValues loadDocValues(LeafReaderContext context) {
final LeafNumericFieldData data = indexFieldData.load(context);
SortedNumericDocValues values;
if (data instanceof SortedNumericIndexFieldData.NanoSecondFieldData) {
values = ((SortedNumericIndexFieldData.NanoSecondFieldData) data).getLongValuesAsNanos();
} else {
values = data.getLongValues();
}
return converter != null ? converter.apply(values) : values;
}
private NumericDocValues getNumericDocValues(LeafReaderContext context, long missingValue) throws IOException {
final SortedNumericDocValues values = loadDocValues(context);
if (nested == null) {
return FieldData.replaceMissing(sortMode.select(values), missingValue);
}
final BitSet rootDocs = nested.rootDocs(context);
final DocIdSetIterator innerDocs = nested.innerDocs(context);
final int maxChildren = nested.getNestedSort() != null ? nested.getNestedSort().getMaxChildren() : Integer.MAX_VALUE;
return sortMode.select(values, missingValue, rootDocs, innerDocs, context.reader().maxDoc(), maxChildren);
}
@Override
public FieldComparator newComparator(String fieldname, int numHits, int sortPos, boolean reversed) {
assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
final long lMissingValue = (Long) missingObject(missingValue, reversed);
// NOTE: it's important to pass null as a missing value in the constructor so that
// the comparator doesn't check docsWithField since we replace missing values in select()
LongComparator comparator = new LongComparator(numHits, null, null, reversed, sortPos) {
@Override
public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
return new LongLeafComparator(context) {
@Override
protected NumericDocValues getNumericDocValues(LeafReaderContext context, String field) throws IOException {
return LongValuesComparatorSource.this.getNumericDocValues(context, lMissingValue);
}
};
}
};
// TODO: when LUCENE-10154 is available, instead of disableSkipping this comparator should implement `getPointValue`
comparator.disableSkipping();
return comparator;
}
@Override
public BucketedSort newBucketedSort(
BigArrays bigArrays,
SortOrder sortOrder,
DocValueFormat format,
int bucketSize,
BucketedSort.ExtraData extra
) {
return new BucketedSort.ForLongs(bigArrays, sortOrder, format, bucketSize, extra) {
private final long lMissingValue = (Long) missingObject(missingValue, sortOrder == SortOrder.DESC);
@Override
public Leaf forLeaf(LeafReaderContext ctx) throws IOException {
return new Leaf(ctx) {
private final NumericDocValues docValues = getNumericDocValues(ctx, lMissingValue);
private long docValue;
@Override
protected boolean advanceExact(int doc) throws IOException {
if (docValues.advanceExact(doc)) {
docValue = docValues.longValue();
return true;
}
return false;
}
@Override
protected long docValue() {
return docValue;
}
};
}
};
}
@Override
public Object missingObject(Object missingValue, boolean reversed) {
if (targetNumericType == NumericType.DATE_NANOSECONDS) {
// special case to prevent negative values that would cause invalid nanosecond ranges
if (sortMissingFirst(missingValue) || sortMissingLast(missingValue)) {
final boolean min = sortMissingFirst(missingValue) ^ reversed;
return min ? 0L : DateUtils.MAX_NANOSECOND;
}
}
return super.missingObject(missingValue, reversed);
}
}