package org.apache.flink.api.java.aggregation;
/**
* 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.flink.api.java.aggregation;
//
//
//public abstract class AvgAggregationFunction<T> extends AggregationFunction<T> {
// private static final long serialVersionUID = 1L;
//
//
// @Override
// public String toString() {
// return "AVG";
// }
//
// // --------------------------------------------------------------------------------------------
//
// public static final class ByteAvgAgg extends AvgAggregationFunction<Byte> {
// private static final long serialVersionUID = 1L;
//
// private long sum;
// private long count;
//
// @Override
// public void initializeAggregate() {
// sum = 0;
// count = 0;
// }
//
// @Override
// public void aggregate(Byte value) {
// sum += value.byteValue();
// count++;
// }
//
// @Override
// public Byte getAggregate() {
// return (byte) (sum / count);
// }
// }
//
// public static final class ShortAvgAgg extends AvgAggregationFunction<Short> {
// private static final long serialVersionUID = 1L;
//
// private long sum;
// private long count;
//
// @Override
// public void initializeAggregate() {
// sum = 0;
// count = 0;
// }
//
// @Override
// public void aggregate(Short value) {
// sum += value.shortValue();
// count++;
// }
//
// @Override
// public Short getAggregate() {
// return (short) (sum / count);
// }
// }
//
// public static final class IntAvgAgg extends AvgAggregationFunction<Integer> {
// private static final long serialVersionUID = 1L;
//
// private long sum;
// private long count;
//
// @Override
// public void initializeAggregate() {
// sum = 0;
// count = 0;
// }
//
// @Override
// public void aggregate(Integer value) {
// sum += value.intValue();
// count++;
// }
//
// @Override
// public Integer getAggregate() {
// return (int) (sum / count);
// }
// }
//
// public static final class LongAvgAgg extends AvgAggregationFunction<Long> {
// private static final long serialVersionUID = 1L;
//
// private long sum;
// private long count;
//
// @Override
// public void initializeAggregate() {
// sum = 0;
// count = 0;
// }
//
// @Override
// public void aggregate(Long value) {
// sum += value.longValue();
// count++;
// }
//
// @Override
// public Long getAggregate() {
// return sum / count;
// }
// }
//
// public static final class FloatAvgAgg extends AvgAggregationFunction<Float> {
// private static final long serialVersionUID = 1L;
//
// private float sum;
// private long count;
//
// @Override
// public void initializeAggregate() {
// sum = 0.0f;
// count = 0;
// }
//
// @Override
// public void aggregate(Float value) {
// sum += value.floatValue();
// count++;
// }
//
// @Override
// public Float getAggregate() {
// return sum / count;
// }
// }
//
// public static final class DoubleAvgAgg extends AvgAggregationFunction<Double> {
// private static final long serialVersionUID = 1L;
//
// private double sum;
// private long count;
//
// @Override
// public void initializeAggregate() {
// sum = 0.0;
// count = 0;
// }
//
// @Override
// public void aggregate(Double value) {
// sum += value.doubleValue();
// count++;
// }
//
// @Override
// public Double getAggregate() {
// return sum / count;
// }
// }
//
//
// // --------------------------------------------------------------------------------------------
//
// public static final class AvgAggregationFunctionFactory implements AggregationFunctionFactory {
// private static final long serialVersionUID = 1L;
//
// @SuppressWarnings("unchecked")
// @Override
// public <T> AggregationFunction<T> createAggregationFunction(Class<T> type) {
// if (type == Long.class) {
// return (AggregationFunction<T>) new LongAvgAgg();
// }
// else if (type == Integer.class) {
// return (AggregationFunction<T>) new IntAvgAgg();
// }
// else if (type == Double.class) {
// return (AggregationFunction<T>) new DoubleAvgAgg();
// }
// else if (type == Float.class) {
// return (AggregationFunction<T>) new FloatAvgAgg();
// }
// else if (type == Byte.class) {
// return (AggregationFunction<T>) new ByteAvgAgg();
// }
// else if (type == Short.class) {
// return (AggregationFunction<T>) new ShortAvgAgg();
// }
// else {
// throw new UnsupportedAggregationTypeException("The type " + type.getName() +
// " has currently not supported for built-in average aggregations.");
// }
// }
// }
//}