/* 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.spatial.geometries.cursors;
import xxl.core.cursors.filters.WhileTaker;
import xxl.core.predicates.AbstractPredicate;
/** A DistanceQuery delivers all neighbors of a query-object whose distance to the
* query- object is below epsilon.
*
* @see xxl.core.spatial.geometries.cursors.NearestNeighborQuery
*/
public class DistanceQuery extends WhileTaker<DistanceWeightedKPE>{
/** Initializes the DistanceQuery.
*
* @param nnQuery the query-operator which returns its results sorted by the minimum distance to
* the query object
* @param epsilon the maximum distance between the query object and qualifying result- objects
*/
public DistanceQuery( NearestNeighborQuery nnQuery, final double epsilon){
super( nnQuery,
new AbstractPredicate<DistanceWeightedKPE>(){
public boolean invoke(DistanceWeightedKPE k){
return k.getDistance()<= epsilon;
}
}
);
}
}