/**
* Parse a geometry starting at offset.
*
* @param data ValueGetter with the data to be parsed
* @return the parsed geometry
*/
protected Geometry parseGeometry(ValueGetter data) {
byte endian = data.getByte(); // skip and test endian flag
if (endian != data.endian) {
throw new IllegalArgumentException("Endian inconsistency!");
}
int typeword = data.getInt();
int realtype = typeword & 0x1FFFFFFF; // cut off high flag bits
boolean haveZ = (typeword & 0x80000000) != 0;
boolean haveM = (typeword & 0x40000000) != 0;
boolean haveS = (typeword & 0x20000000) != 0;
int srid = Geometry.UNKNOWN_SRID;
if (haveS) {
srid = Geometry.parseSRID(data.getInt());
}
Geometry result1;
switch (realtype) {
case Geometry.POINT:
result1 = parsePoint(data, haveZ, haveM);
break;
case Geometry.LINESTRING:
result1 = parseLineString(data, haveZ, haveM);
break;
case Geometry.POLYGON:
result1 = parsePolygon(data, haveZ, haveM);
break;
case Geometry.MULTIPOINT:
result1 = parseMultiPoint(data);
break;
case Geometry.MULTILINESTRING:
result1 = parseMultiLineString(data);
break;
case Geometry.MULTIPOLYGON:
result1 = parseMultiPolygon(data);
break;
case Geometry.GEOMETRYCOLLECTION:
result1 = parseCollection(data);
break;
default:
throw new IllegalArgumentException("Unknown Geometry Type: " + realtype);
}
Geometry result = result1;
if (srid != Geometry.UNKNOWN_SRID) {
result.setSrid(srid);
}
return result;
}
