/*
* 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;
import org.apache.geode.cache.query.QueryService;
/**
* Computes the non distinct average for replicated region based queries
*
*
*/
public class Avg extends Sum {
private int num = 0;
@Override
public void accumulate(Object value) {
if (value != null && value != QueryService.UNDEFINED) {
super.accumulate(value);
++num;
}
}
@Override
public void init() {
}
@Override
public Object terminate() {
double sum = ((Number) super.terminate()).doubleValue();
double result = sum / num;
return downCast(result);
}
}