Adding Methodes

[sirrurg]

Hi everyone!

I have a question about bytecode manipulation with Javassist.
Is it possible to modify more than one class a time and
compile them together?!?
I think of doing sth like this:

class A{
 void dosth(){
 ...
 B.dosthmore();
 ....
 }
}
class B{
 void dosthmore(){...}
}

And i want to change it in sth like this ..

class A{
 void dosth$impl(){
 ...
 B.dosthmore$impl();
 ...
 }
 void dosth(){
 ...
 dosth$impl();
 ....
 }
}
class B{
 void dosthmore$impl(){...}
 void dosthmore(){...}
}

As i saw in the tutorial it is easy to modify one class a time,
is this also true for more than 1?!? Or do i have to
split this up into 2 "Loops" ?

Sincerely
Sirrurg

[chiba]

Yes, but you must first add dosth$impl() as an abstract
method so that the compiler can resolve that method name.
You can later give a method body to dosth$imple().

[sirrurg]

ok ... thx!
So if i understand this correctly, to add the "cross"-call to B.dosthmore(), this class must also already contain a method called dosthmore$impl(),
before i can add the new method-body to A.dosth$impl().

As consequence i must first add all new methods as "abstract"
to all classes which should be changed and then in an 2nd step add
the implementation of this methodes, like in the following code?

...
foreach(CtClass cls in classes){
 cls.stopPruning(true);
 addAbstractMethodes(cls);
 cls.writeFile();
}
foreach(CtClass cls in classes){
 addImplOfMethodes(cls);
 // here probably cls.stopPruning(false);
 cls.writeFile();
}
// everythings done hopefully

[chiba]

Exactly. I could not come up with a better idea than this.
If you have one, please let me know. Thanks. :-)

[sirrurg]

OK... thx very much, i ll try this out.

[sirrurg]

Hi,

i ll tried this 2 step method out and it works.
And by loading all classes at the beginning of the processing,
i dont have to use stopPruning.

[chiba]

Ah, pruning is now off by default.

[sirrurg]

OK ... thx, good to know ;)