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Re: [aspectj-users] Dynamically modifying Java class structure
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Why is it impossible?
Many years ago before I knew about AJ, I created a program that
writes a Java program, invokes the compiler, then uses reflection to
load the created program. Couldn't he do something similar and use
AJ to simplify the modification process? Admittedly, he might need
to start a child ClassLoader and unload the whole thing if he needs
to load, unload, modify, and reload; however, he shouldn't even need
to do that if he only needs to load the modified version once per
program execution.
The only special thing I see is that he'll need access to javac, AJ,
BCEL, or whatever other tool he chooses to accomplish the modification.
On Oct 16, 2007, at 11:55 PM, Eric Bodden wrote:
Hi, Hendrik. What do you mean by "dynamically"? Do you mean "at
runtime"? If so, that's impossible to do...
Eric
On 16/10/2007, Hendrik Gani <s2116865@xxxxxxxxxxxxxxxxxxx> wrote:
Hi,
I am not sure whether the mailing list is an appropriate place to ask
the following questions, but I could not find the relevant
newsgroup for
aspectj users (only found AJDT newsgroup),
I am trying to develop a solution to automatically insert new
constructors to existing classes. I've considered using AspectJ to do
it, however as far as I know it will only work if the name of the
class
to be modified was known beforehand (has to be hardcoded in the
aspect),
which is not applicable in my case.
So, could anyone please give me some suggestions or
recommendations on
this? Especially in terms of the following:
- Is Aspectj the best tool to do this? If so, how to do it without
hardcoding class names?
- Should I look at bytecode reengineering/manipulation tools
instead? If
so, what's the most suitable library for my case (since I am aware
that
there are a lot of choices out there when it comes to bytecode
manipulation)?
Thanks a lot for any helps, suggestions, and ideas.
Regards,
Hendrik
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--
Eric Bodden
Sable Research Group
McGill University, Montréal, Canada
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