/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.gwt.client.spatial.geometry.operation;
import org.geomajas.gwt.client.spatial.geometry.Geometry;
import org.geomajas.gwt.client.spatial.geometry.LinearRing;
import org.geomajas.gwt.client.spatial.geometry.Polygon;
/**
* <code>GeometryOperation</code> that inserts a new {@link LinearRing} in the array of interior rings of a
* {@link Polygon} object.
*
* @author Pieter De Graef
*/
public class InsertRingOperation implements GeometryOperation {
/**
* The actual LinearRing to add.
*/
private LinearRing ring;
/**
* The integer index where to insert the ring into the array of interior rings.
*/
private int index;
/**
* Add a new LinearRing to a {@link Polygon} object.
*
* @param ring
* The actual LinearRing to add.
*/
public InsertRingOperation(LinearRing ring, int index) {
this.ring = ring;
this.index = index;
}
/**
* Execute the operation! When the geometry is not a Polygon, null is returned.
*/
public Geometry execute(Geometry geometry) {
if (geometry instanceof Polygon) {
Polygon polygon = (Polygon) geometry;
if (geometry.isEmpty()) {
return null;
} else {
LinearRing[] interiorRings = new LinearRing[polygon.getNumInteriorRing() + 1];
int count = 0;
for (int n = 0; n < interiorRings.length; n++) {
if (n == index) {
interiorRings[n] = ring;
} else {
interiorRings[n] = polygon.getInteriorRingN(count);
}
}
return geometry.getGeometryFactory().createPolygon(polygon.getExteriorRing(), interiorRings);
}
}
return null;
}
}