It is useful to learn how the aspect weaver approach of Demeter/Java
works: This is useful for some of your projects, like
the Java Beans project.

Each class is translated into a *.asp file when you use the -aspect
flag.

Each aspect description  (for example, program.cool) is translated
into an *.asp file (for example, cool.asp).

*.asp files consist of "editing instructions" which say how an aspect
modifies an existing program.

Some editing instructions are:

add: public class
add: to: ClassName
before: ClassName.MethodName
after: ClassName.MethodName

For a complete example, see 

http://www.ccs.neu.edu/research/demeter/course/f97/cool/cool-demo/gen
Main.asp            Printer.asp         cool.asp
PrintSender.asp     __Subtraversal.asp

-- Karl L.