/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.data.sort;
import java.util.Comparator;
import java.util.List;
import org.opengis.feature.simple.SimpleFeature;
/**
* A composite comparator that applies the provided comparators as a hierarchical list, the first
* comparator that returns a non zero value "wins"
*
* @author Andrea Aime - GeoSolutions
*
*/
class CompositeComparator implements Comparator<SimpleFeature> {
List<Comparator<SimpleFeature>> comparators;
public CompositeComparator(List<Comparator<SimpleFeature>> comparators) {
this.comparators = comparators;
}
public int compare(SimpleFeature f1, SimpleFeature f2) {
for (Comparator<SimpleFeature> comp : comparators) {
int result = comp.compare(f1, f2);
if (result != 0) {
return result;
}
}
return 0;
}
}