protected int getGeometryType(Geometry geometry) {
WkbGeometryType type = WkbGeometryType.forClass(geometry.getClass());
if (type == null)
throw new UnsupportedConversionException(
String.format(
"Can't convert geometries of type %s", geometry.getClass().getCanonicalName()));
return type.getTypeCode();
}
protected void writeTypeCodeAndSrid(
Geometry geometry, DimensionalFlag dimension, ByteBuffer output) {
int typeCode = getGeometryType(geometry);
boolean hasSrid = (geometry.getSRID() > 0);
if (hasSrid && !hasWrittenSrid) typeCode |= PostgisWkbTypeMasks.SRID_FLAG;
if (dimension.isMeasured()) typeCode |= PostgisWkbTypeMasks.M_FLAG;
if (dimension.is3D()) typeCode |= PostgisWkbTypeMasks.Z_FLAG;
output.putUInt(typeCode);
if (hasSrid && !hasWrittenSrid) {
output.putInt(geometry.getSRID());
hasWrittenSrid = true;
}
}
protected int getGeometryType(Geometry<P> geometry) {
// empty geometries have the same representation as an empty geometry collection
if (geometry.isEmpty()) {
return WkbGeometryType.GEOMETRY_COLLECTION.getTypeCode();
}
WkbGeometryType type = WkbGeometryType.forClass(geometry.getClass());
if (type == null) {
throw new UnsupportedConversionException(
String.format(
"Can't convert geometries of type %s", geometry.getClass().getCanonicalName()));
}
return type.getTypeCode();
}
private int calculateSize(Geometry geom, boolean includeSrid) {
int size = 1 + ByteBuffer.UINT_SIZE; // size for order byte + type field
if (geom.getSRID() > 0 && includeSrid) size += 4;
if (geom instanceof GeometryCollection) {
size += sizeOfGeometryCollection((GeometryCollection) geom);
} else if (geom instanceof Polygon) {
size += getPolygonSize((Polygon) geom);
} else if (geom instanceof Point) {
size += getPointByteSize(geom);
} else if (geom instanceof PolyHedralSurface) {
size += getPolyHedralSurfaceSize((PolyHedralSurface) geom);
} else {
size += ByteBuffer.UINT_SIZE; // to hold number of points
size += getPointByteSize(geom) * geom.getNumPoints();
}
return size;
}
private int getPointByteSize(Geometry geom) {
return geom.getCoordinateDimension() * ByteBuffer.DOUBLE_SIZE;
}
private void writeGeometry(Geometry geom, ByteBuffer output) {
geom.accept(new WkbVisitor(output));
}
