org.elasticsearch.index.fielddata.fieldcomparator.FloatValuesComparatorSource 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 :server
/*
* 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.search.DocIdSetIterator;
import org.apache.lucene.search.FieldComparator;
import org.apache.lucene.search.LeafFieldComparator;
import org.apache.lucene.search.Scorable;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.comparators.FloatComparator;
import org.apache.lucene.util.BitSet;
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.NumericDoubleValues;
import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
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;
/**
* Comparator source for float values.
*/
public class FloatValuesComparatorSource extends IndexFieldData.XFieldComparatorSource {
private final IndexNumericFieldData indexFieldData;
public FloatValuesComparatorSource(
IndexNumericFieldData indexFieldData,
@Nullable Object missingValue,
MultiValueMode sortMode,
Nested nested
) {
super(missingValue, sortMode, nested);
this.indexFieldData = indexFieldData;
}
@Override
public SortField.Type reducedType() {
return SortField.Type.FLOAT;
}
private NumericDoubleValues getNumericDocValues(LeafReaderContext context, float missingValue) throws IOException {
final SortedNumericDoubleValues values = indexFieldData.load(context).getDoubleValues();
if (nested == null) {
return FieldData.replaceMissing(sortMode.select(values), missingValue);
} else {
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, boolean enableSkipping, boolean reversed) {
assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
final float fMissingValue = (Float) 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()
return new FloatComparator(numHits, null, null, reversed, false) {
@Override
public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
return new FloatLeafComparator(context) {
@Override
protected NumericDocValues getNumericDocValues(LeafReaderContext context, String field) throws IOException {
return FloatValuesComparatorSource.this.getNumericDocValues(context, fMissingValue).getRawFloatValues();
}
};
}
};
}
@Override
public BucketedSort newBucketedSort(
BigArrays bigArrays,
SortOrder sortOrder,
DocValueFormat format,
int bucketSize,
BucketedSort.ExtraData extra
) {
return new BucketedSort.ForFloats(bigArrays, sortOrder, format, bucketSize, extra) {
private final float dMissingValue = (Float) missingObject(missingValue, sortOrder == SortOrder.DESC);
@Override
public boolean needsScores() {
return false;
}
@Override
public Leaf forLeaf(LeafReaderContext ctx) throws IOException {
return new Leaf(ctx) {
private final NumericDoubleValues docValues = getNumericDocValues(ctx, dMissingValue);
private float docValue;
@Override
public void setScorer(Scorable scorer) {}
@Override
protected boolean advanceExact(int doc) throws IOException {
if (docValues.advanceExact(doc)) {
docValue = (float) docValues.doubleValue();
return true;
}
return false;
}
@Override
protected float docValue() {
return docValue;
}
};
}
};
}
}