/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF 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.apache.geode.cache.query.internal.aggregate;
/**
* Computes the final non distinct average for a partitioned region based query. This aggregator is
* instantiated on the PR query node.
*
*
*/
public class AvgPRQueryNode extends Sum {
private int count = 0;
/**
* Takes the input of data received from bucket nodes. The data is of the form of two element
* array. The first element is the number of values, while the second element is the sum of the
* values.
*/
@Override
public void accumulate(Object value) {
Object[] array = (Object[]) value;
this.count += ((Integer) array[0]).intValue();
super.accumulate(array[1]);
}
@Override
public Object terminate() {
double sum = ((Number) super.terminate()).doubleValue();
double result = sum / count;
return downCast(result);
}
}