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/***********************************************************************************************************************
 *
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * Licensed 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 eu.stratosphere.api.java.aggregation;
//
//
//public abstract class AvgAggregationFunction extends AggregationFunction {
//	private static final long serialVersionUID = 1L;
//
//
//	@Override
//	public String toString() {
//		return "AVG";
//	}
//	
//	// --------------------------------------------------------------------------------------------
//	
//	public static final class ByteAvgAgg extends AvgAggregationFunction {
//		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 {
//		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 {
//		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 {
//		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 {
//		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 {
//		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  AggregationFunction createAggregationFunction(Class type) {
//			if (type == Long.class) {
//				return (AggregationFunction) new LongAvgAgg();
//			}
//			else if (type == Integer.class) {
//				return (AggregationFunction) new IntAvgAgg();
//			}
//			else if (type == Double.class) {
//				return (AggregationFunction) new DoubleAvgAgg();
//			}
//			else if (type == Float.class) {
//				return (AggregationFunction) new FloatAvgAgg();
//			}
//			else if (type == Byte.class) {
//				return (AggregationFunction) new ByteAvgAgg();
//			}
//			else if (type == Short.class) {
//				return (AggregationFunction) new ShortAvgAgg();
//			}
//			else {
//				throw new UnsupportedAggregationTypeException("The type " + type.getName() + 
//					" has currently not supported for built-in average aggregations.");
//			}
//		}
//	}
//}