Hi,

Following code is part of a stub code that related to a simple addition application which is generated using j2sdk1.4.2 IDL. I want to ask questions about it.

1- Could anyone explain what are doing in this code?

2- What is the meaning of "$" and "_" prefixs in front of the variables (e.g., flaot $result) and methods (eg., _invoke($out) )?

3- What is "_invoke($out)" method doing in run-time?

Sincerely...

Halil

**************************************************

			

			public class _AdditionStub extends org.omg.CORBA.portable.ObjectImpl implements AdditionApp.Add {
			

			

			public float add (float number1, float number2)  {
			

			org.omg.CORBA.portable.InputStream $in = null;
			

			try {
			

			org.omg.CORBA.portable.OutputStream $out = _request ("add", true);
			

			$out.write_float (number1);
			

			$out.write_float (number2);
			

			$in = _invoke ($out);
			

			float $result = $in.read_float ();
			

			return $result;
			

			} catch (org.omg.CORBA.portable.ApplicationException $ex) {
			

			$in = $ex.getInputStream ();
			

			String _id = $ex.getId ();
			

			throw new org.omg.CORBA.MARSHAL (_id);
			

			} catch (org.omg.CORBA.portable.RemarshalException $rm) {
			

			return add (number1, number2);
			

			} finally {
			

			_releaseReply ($in);
			

			}
			

			} // add
			

			...
			

			...
			

			...
			

			} // public class