/* 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.functions;
import java.util.List;
import xxl.core.util.metaData.MetaDataProvider;
/**
* A marker interface for functions providing metadata.
*
* @param <P> the type of the function's parameters.
* @param <R> the return type of the function.
* @param <M> the type of the meta data provided by this function.
*/
public interface MetaDataFunction<P, R, M> extends Function<P, R>, MetaDataProvider<M> {
@Override
public abstract R invoke(List<? extends P> arguments);
@Override
public abstract R invoke();
@Override
public abstract R invoke(P argument);
@Override
public abstract R invoke(P argument0, P argument1);
@Override
public abstract M getMetaData();
}