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/*
* 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.search.aggregations.bucket.composite;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.SortedNumericDocValues;
import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import java.io.IOException;
class HistogramValuesSource extends ValuesSource.Numeric {
private final Numeric vs;
private final double interval;
/**
*
* @param vs The original values source
*/
HistogramValuesSource(Numeric vs, double interval) {
this.vs = vs;
this.interval = interval;
}
@Override
public boolean isFloatingPoint() {
return true;
}
@Override
public SortedNumericDoubleValues doubleValues(LeafReaderContext context) throws IOException {
SortedNumericDoubleValues values = vs.doubleValues(context);
return new SortedNumericDoubleValues() {
@Override
public double nextValue() throws IOException {
return Math.floor(values.nextValue() / interval) * interval;
}
@Override
public int docValueCount() {
return values.docValueCount();
}
@Override
public boolean advanceExact(int target) throws IOException {
return values.advanceExact(target);
}
};
}
@Override
public SortedBinaryDocValues bytesValues(LeafReaderContext context) throws IOException {
throw new UnsupportedOperationException("not applicable");
}
@Override
public SortedNumericDocValues longValues(LeafReaderContext context) throws IOException {
throw new UnsupportedOperationException("not applicable");
}
}