/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2010, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.geojson.geom;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.json.simple.parser.ParseException;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LinearRing;
import com.vividsolutions.jts.geom.Polygon;
public class PolygonHandler extends GeometryHandlerBase<Polygon> {
List<Coordinate> coordinates;
List<Coordinate[]> rings;
public PolygonHandler(GeometryFactory factory) {
super(factory);
}
@Override
public boolean startObjectEntry(String key) throws ParseException, IOException {
if ("coordinates".equals(key)) {
rings = new ArrayList();
}
return true;
}
@Override
public boolean endObject() throws ParseException, IOException {
if (rings != null) {
if (rings.isEmpty()) {
throw new IllegalArgumentException("Polygon specified with no rings.");
}
LinearRing outer = factory.createLinearRing(rings.get(0));
LinearRing[] inner = null;
if (rings.size() > 1) {
inner = new LinearRing[rings.size()-1];
for (int i = 1; i < rings.size(); i++) {
inner[i-1] = factory.createLinearRing(rings.get(i));
}
}
value = factory.createPolygon(outer, inner);
rings = null;
}
return true;
}
@Override
public boolean startArray() throws ParseException, IOException {
if (coordinates == null) {
coordinates = new ArrayList();
}
else if (ordinates == null) {
ordinates = new ArrayList();
}
return true;
}
@Override
public boolean endArray() throws ParseException, IOException {
if (ordinates != null) {
Coordinate c = coordinate(ordinates);
coordinates.add(c);
ordinates = null;
}
else if (coordinates != null) {
rings.add(coordinates(coordinates));
coordinates = null;
}
return true;
}
}