/*
* 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));
}
}
}