/**
* Helios, OpenSource Monitoring
* Brought to you by the Helios Development Group
*
* Copyright 2012, Helios Development Group and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
*/
package org.helios.apmrouter.monitor.aggregate;
import java.util.List;
/**
* <p>Title: IAggregator</p>
* <p>Description: Defines an aggregation function that accepts a list of objects and returns an object representing the aggregate.</p>
* <p>Company: Helios Development Group LLC</p>
* @author Whitehead (nwhitehead AT heliosdev DOT org)
* <p><code>org.helios.apmrouter.monitor.aggregate.IAggregator</code></p>
*/
public interface IAggregator {
/**
* Computes an aggregate of the passed items
* @param items The items to compute an aggregate for
* @return The aggregate result
*/
public Object aggregate(List<Object> items);
/**
* Aggregates a long array
* @param items The array of longs to aggregate
* @return the aggregated long value
*/
public long aggregate(long[] items);
/**
* Aggregates a double array
* @param items The array of double to aggregate
* @return the aggregated double value
*/
public double aggregate(double[] items);
}