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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.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");
}
}