Ellipsoid parseSpheroid(final Element parent) throws ParseException {
Element element = parent.pullElement("SPHEROID");
String name = element.pullString("name");
double semiMajorAxis = element.pullDouble("semiMajorAxis");
double inverseFlattening = element.pullDouble("inverseFlattening");
Map<String, ?> properties = parseAuthority(element, name);
element.close();
if (inverseFlattening == 0) {
// Inverse flattening null is an OGC convention for a sphere.
inverseFlattening = Double.POSITIVE_INFINITY;
}
return new Ellipsoid(name, semiMajorAxis, 0, inverseFlattening, name);
}
Object parsePrimem(final Element parent, final Unit angularUnit) throws ParseException {
final Element element = parent.pullElement("PRIMEM");
final String name = element.pullString("name");
final double longitude = element.pullDouble("longitude");
final Map<String, ?> properties = parseAuthority(element, name);
element.close();
return null;
}
Datum parseDatum(final Element parent, final Object meridian) throws ParseException {
Element element = parent.pullElement("DATUM");
String name = element.pullString("name");
Ellipsoid ellipsoid = parseSpheroid(element);
double[] toWGS84 = parseToWGS84(element); // Optional; may be
// null.
Map<String, Object> properties = parseAuthority(element, name);
if (true /*ALLOW_ORACLE_SYNTAX*/ && (toWGS84 == null) && (element.peek() instanceof Number)) {
toWGS84 = new double[7];
toWGS84[0] = element.pullDouble("dx");
toWGS84[1] = element.pullDouble("dy");
toWGS84[2] = element.pullDouble("dz");
toWGS84[3] = element.pullDouble("ex");
toWGS84[4] = element.pullDouble("ey");
toWGS84[5] = element.pullDouble("ez");
toWGS84[6] = element.pullDouble("ppm");
}
element.close();
return new Datum(name, toWGS84, ellipsoid, name);
}
double[] parseToWGS84(final Element parent) throws ParseException {
final Element element = parent.pullOptionalElement("TOWGS84");
if (element == null) {
return null;
}
double dx = element.pullDouble("dx");
double dy = element.pullDouble("dy");
double dz = element.pullDouble("dz");
try {
if (element.peek() != null) {
double ex = element.pullDouble("ex");
double ey = element.pullDouble("ey");
double ez = element.pullDouble("ez");
double ppm = element.pullDouble("ppm");
return new double[] {dx, dy, dz, ex, ey, ez, ppm};
} else {
return new double[] {dx, dy, dz};
}
} finally {
element.close();
}
}
String[] parseParameters(Element e) throws ParseException {
Element p = null;
List<String> params = new ArrayList<String>();
while ((p = e.pullOptionalElement("PARAMETER")) != null) {
String key = p.pullString("name");
Double val = p.pullDouble("value");
Param param = Param.valueOf(key);
if (param == null) {
throw new IllegalArgumentException("Unsupported projection parameter: " + key);
}
params.add(String.format("%s=%f", param.proj4, val));
}
return params.toArray(new String[params.size()]);
}
Unit parseUnit(final Element parent, final Unit unit) throws ParseException {
final Element element = parent.pullElement("UNIT");
final String name = element.pullString("name");
final double factor = element.pullDouble("factor");
final Map<String, ?> properties = parseAuthority(element, name);
element.close();
if (name != null) {
Unit u = Units.findUnits(name.toLowerCase());
if (u != null) {
return u;
}
}
return (factor != 1) ? times(unit, factor) : unit;
}
