/*
* 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.script.expression;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.queries.function.docvalues.DoubleDocValues;
import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
/**
* FunctionValues to get the count of the number of values in a field for a document.
*/
public class CountMethodFunctionValues extends DoubleDocValues {
SortedNumericDoubleValues values;
CountMethodFunctionValues(ValueSource parent, AtomicNumericFieldData fieldData) {
super(parent);
values = fieldData.getDoubleValues();
}
@Override
public double doubleVal(int doc) {
values.setDocument(doc);
return values.count();
}
}