public int compare(Area arg0, Area arg1) 
				{
					for(String sortField : sortFields)
					{
						Comparable val0=getAreaStatFromSomewhere(arg0,sortField);
						Comparable val1=getAreaStatFromSomewhere(arg1,sortField);
						int comp=1;
						if((val0==null)&&(val1==null))
							comp=0;
						else
						if(val0==null)
							comp=-1;
						else
						if(val1==null)
							comp=1;
						else
							comp=val0.compareTo(val1);
						if(comp!=0)
							return comp;
					}
					return 0;
				}