/* * 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.triangulate; import java.util.*; import com.vividsolutions.jts.geom.*; /** * Creates a map between the vertex {@link Coordinate}s of a * set of {@link Geometry}s, * and the parent geometry, and transfers the source geometry * data objects to geometry components tagged with the coordinates. * <p> * This class can be used in conjunction with {@link VoronoiDiagramBuilder} * to transfer data objects from the input site geometries * to the constructed Voronoi polygons. * * @author Martin Davis * @see VoronoiDiagramBuilder * */ public class VertexTaggedGeometryDataMapper { private Map coordDataMap = new TreeMap(); public VertexTaggedGeometryDataMapper() { } public void loadSourceGeometries(Collection geoms) { for (Iterator i = geoms.iterator(); i.hasNext(); ) { Geometry geom = (Geometry) i.next(); loadVertices(geom.getCoordinates(), geom.getUserData()); } } public void loadSourceGeometries(Geometry geomColl) { for (int i = 0; i < geomColl.getNumGeometries(); i++) { Geometry geom = geomColl.getGeometryN(i); loadVertices(geom.getCoordinates(), geom.getUserData()); } } private void loadVertices(Coordinate[] pts, Object data) { for (int i = 0; i < pts.length; i++) { coordDataMap.put(pts[i], data); } } public List getCoordinates() { return new ArrayList(coordDataMap.keySet()); } /** * Input is assumed to be a multiGeometry * in which every component has its userData * set to be a Coordinate which is the key to the output data. * The Coordinate is used to determine * the output data object to be written back into the component. * * @param targetGeom */ public void transferData(Geometry targetGeom) { for (int i = 0; i < targetGeom.getNumGeometries(); i++) { Geometry geom = targetGeom.getGeometryN(i); Coordinate vertexKey = (Coordinate) geom.getUserData(); if (vertexKey == null) continue; geom.setUserData(coordDataMap.get(vertexKey)); } } }