AvgAggregator.java

/*******************************************************************************
 * gMix open source project - https://svs.informatik.uni-hamburg.de/gmix/
 * Copyright (C) 2014  SVS
 *
 * This program is free software: you can redistribute it and/or modify 
 * it under the terms of the GNU General Public License as published by 
 * the Free Software Foundation, either version 3 of the License, or 
 * (at your option) any later version.
 *  
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License 
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package staticContent.evaluation.simulator.core.statistics.aggregator;

import java.math.BigDecimal;

import gnu.trove.TDoubleArrayList;


public class AvgAggregator extends AggregatorImplementation {

	private GetSumHelper getSumHelper = new GetSumHelper();
	
	
	@Override
	public double aggregate(TDoubleArrayList recordedValues) {
		if (recordedValues.size() == 0) { // avoid division by zero
			System.err.println("WARNING: no data recorded (AvgAggregator)"); 
			return 0d;
		}
		BigDecimal sum = getSumHelper.getSum(recordedValues);
		BigDecimal avg = sum.divide(new BigDecimal(recordedValues.size()), 5, BigDecimal.ROUND_HALF_UP);
		return avg.doubleValue();
	}
		
}