/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jtslab.clean;
import org.locationtech.jts.algorithm.CGAlgorithms;
import org.locationtech.jts.geom.Geometry;
/**
* Removes holes which are smaller than a given area.
*
* @author Martin Davis
*
*/
public class SmallHoleRemover {
private static class IsSmall implements HoleRemover.Predicate {
private double area;
public IsSmall(double area) {
this.area = area;
}
@Override
public boolean value(Geometry geom) {
double holeArea = Math.abs(CGAlgorithms.signedArea(geom.getCoordinates()));
return holeArea <= area;
}
}
/**
* Removes small holes from the polygons in a geometry.
*
* @param geom the geometry to clean
* @return the geometry with invalid holes removed
*/
public static Geometry clean(Geometry geom, double areaTolerance) {
HoleRemover remover = new HoleRemover(geom, new IsSmall(areaTolerance));
return remover.getResult();
}
}