/* Copyright 2012 Thorben Lindhauer
*
* 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 de.unipotsdam.hpi.thorben.ppi.measure.process;
import java.util.List;
import de.unipotsdam.hpi.thorben.ppi.measure.instance.entity.BaseMeasureInstance;
import de.unipotsdam.hpi.thorben.ppi.typehelper.TypeHelper;
public class AverageFunction<T extends Number, K extends BaseMeasureInstance> extends AbstractAggregationFunction<T, K> {
public AverageFunction(TypeHelper<T> typeHelper) {
super(typeHelper);
}
protected T performCalculation(List<K> baseMeasureValues) {
T sum = helper.createZero();
for (K k : baseMeasureValues) {
sum = helper.add(sum, helper.asType(k.calculate()));
}
return helper.divide(sum, helper.asType(baseMeasureValues.size()));
}
}