/* * The JTS Topology Suite is a collection of Java classes that * implement the fundamental operations required to validate a given * geo-spatial data set to a known topological specification. * * Copyright (C) 2001 Vivid Solutions * * 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 2.1 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * For more information, contact: * * Vivid Solutions * Suite #1A * 2328 Government Street * Victoria BC V8T 5G5 * Canada * * (250)385-6040 * www.vividsolutions.com */ package com.vividsolutions.jts.util; import java.util.ArrayList; import java.util.TreeSet; import com.vividsolutions.jts.geom.Coordinate; import com.vividsolutions.jts.geom.CoordinateFilter; /** * A {@link CoordinateFilter} that builds a set of <code>Coordinate</code>s. * The set of coordinates contains no duplicate points. * *@version 1.7 */ public class UniqueCoordinateArrayFilter implements CoordinateFilter { TreeSet treeSet = new TreeSet(); ArrayList list = new ArrayList(); public UniqueCoordinateArrayFilter() { } /** * Returns the gathered <code>Coordinate</code>s. * *@return the <code>Coordinate</code>s collected by this <code>CoordinateArrayFilter</code> */ public Coordinate[] getCoordinates() { Coordinate[] coordinates = new Coordinate[list.size()]; return (Coordinate[]) list.toArray(coordinates); } public void filter(Coordinate coord) { if (!treeSet.contains(coord)) { list.add(coord); treeSet.add(coord); } } }