Reading points from a Geography Polygon in a PostGIS database

My goal: To read the points from a Geography Polygon stored in my PostGIS database.

The PostGIS manual has a great example of how to extract a Polygon from a database.

PGgeometry geom = (PGgeometry)r.getObject(1); 
if (geom.getType() == Geometry.POLYGON ) { 
  Polygon pl = (Polygon)geom.getGeometry(); 

  for (int r = 0; r < pl.numRings(); r++) { 
    LinearRing rng = pl.getRing(r); 
    System.out.println("Ring: " + r); 

    for (int p = 0; p < rng.numPoints(); p++ ) { 
      Point pt = rng.getPoint(p); 
      System.out.println("Point: " + p);
      System.out.println(pt.toString()); 
    } 
  } 
}

I am dealing with Geography, however, not Geometry, so this code does not quite work for me. If I try to extract a Polygon from my table, I get the following ClassCastException:

org.postgresql.util.PGobject cannot be cast to org.postgis.PGgeometry

I've modified the first two lines to look like this, which works:

PGobject area = (PGobject)rs.getObject("area");
if (area.getType().compareTo("geography") == 0) {
    ...
}

My problem now is that I can't figure out how to modify the third line of the code sample to work for Geography. I probably shouldn't cast it to the Polygon type, since that is for Geometry, but is there an equivalent for Geography? I know that Geography is only partially supported for a lot of stuff, so I'm not sure what I can or can't do here.