public Double retrieveDouble(int aPosition)
	   {
	      Object  o = positionEntries.get(aPosition -1);
	      
	      if(o ==null)
	         return null;
	      
	      String text = String.valueOf(o);
	      
	      if(text == null || text.length() == 0)
	    	  return null;
	      
	      return  Double.valueOf(text);
	   }
public Double retrieveDouble ( int aPosition ) { Object o = positionEntries . get ( aPosition - 1 ) ; if ( o == null ) return null ; String text = String . valueOf ( o ) ; if ( text == null || text . length ( ) == 0 ) return null ; return Double . valueOf ( text ) ; }
@param aPosition the positions
@return the double at the position
@see nyla.solutions.core.data.DataRow#retrieveDouble(int)