/* XXL: The eXtensible and fleXible Library for data processing
Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger
Head of the Database Research Group
Department of Mathematics and Computer Science
University of Marburg
Germany
This library 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 3 of the License, or (at your option) any later version.
This library 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 library; If not, see <http://www.gnu.org/licenses/>.
http://code.google.com/p/xxl/
*/
package xxl.core.math.functions;
public class CountingAggregationFunction<P,A> extends DecoratorAggregationFunction<P,A> {
protected long initCalls = 0;
protected long calls = 0;
public CountingAggregationFunction(AggregationFunction<? super P,A> aggregationFunction) {
super(aggregationFunction);
}
public A invoke(A aggregate, P value) {
if (aggregate == null)
initCalls++;
calls++;
return super.invoke(aggregate, value);
}
public long getCalls() {
return calls;
}
public long getInitCalls() {
return initCalls;
}
public void resetCounters() {
this.initCalls = 0;
this.calls = 0;
}
}