Examples with Parser org.geotools.xml.Parser used on opensource projects

Example 6 with Parser

use of org.geotools.xml.Parser in project spatial-portal by AtlasOfLivingAustralia.

the class AreaUploadShapefile method getKMLPolygonAsWKT.

/**
 * parse a KML containing a single placemark, or a placemark in a folder, into WKT.
 *
 * @param kmldata
 * @return WKT if valid, null on error, empty string "" when placemark not matched.
 */
private static String getKMLPolygonAsWKT(String kmldata) {
    try {
        Parser parser = new Parser(new org.geotools.kml.v22.KMLConfiguration());
        SimpleFeature f = (SimpleFeature) parser.parse(new StringReader(kmldata));
        Collection placemarks = (Collection) f.getAttribute(StringConstants.FEATURE);
        Geometry g = null;
        SimpleFeature sf = null;
        // for <Placemark>
        if (!placemarks.isEmpty() && !placemarks.isEmpty()) {
            sf = (SimpleFeature) placemarks.iterator().next();
            g = (Geometry) sf.getAttribute("Geometry");
        }
        // for <Folder><Placemark>
        if (g == null && sf != null) {
            placemarks = (Collection) sf.getAttribute(StringConstants.FEATURE);
            if (placemarks != null && !placemarks.isEmpty()) {
                g = (Geometry) ((SimpleFeature) placemarks.iterator().next()).getAttribute("Geometry");
            } else {
                placemarks = (Collection) sf.getAttribute("Folder");
                if (placemarks != null && !placemarks.isEmpty()) {
                    g = (Geometry) ((SimpleFeature) placemarks.iterator().next()).getAttribute("Geometry");
                }
            }
        }
        if (g != null) {
            WKTWriter wr = new WKTWriter();
            String wkt = wr.write(g);
            return wkt.replace(" (", "(").replace(", ", ",").replace(") ", ")");
        } else {
            return "";
        }
    } catch (SAXException e) {
        LOGGER.error("KML spec parse error", e);
    } catch (ParserConfigurationException e) {
        LOGGER.error("error converting KML to WKT", e);
    } catch (Exception e) {
        LOGGER.error("error reading KML", e);
    }
    return null;
}