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[aspectj-users] Modified classes of the Jar files in Inpath (which shouldn't be modified)

Hi all,

This problem seems to be most interesting one I ever had with AspectJ. It
has multiple sub-problems some of which may not directly be related to

Firstly, what I am doing is to modify some of the classes in a 3rd party
framework using AspectJ. I am using Eclipse AspectJ plugin and so on. So I
add the 3rd party library in the Inpath of AspectJ and apply my advices, and
some of the classes from the framework get modified by AspectJ. This is the
main work flow. By the way, as a side question I'd like to ask this: AspectJ
extracts _all_ the class files from the 3rd party Jar file into the bin
directory, even if 99% percent of them never gets modified. I think this is
the expected behaviour, but is it possible to have AspectJ extract only
those files which gets indeed advised/modified?

And now the problem. I have a few aspects and due to the current
requirements each of them only affects one class from the framework; hence
no wildcards, just one method replaced with an around advice for example.
Hence I expect that only those class files which are advised should be
modified by AspectJ (correct?). This is true except for only 1 case and I
have been struggling to solve this issue. I compare the files and for one
aspect there is a side effect; one more modified class file. 
And then it gets really more interesting; I decompile the "side-effect"
class file and the original class file from the library using Jad and
compare them. Guess what, they are the same!!! Then I use javap to
disassemble these two class files and again the same. However, one of the
files is 15kB and the other is 10kB, which means there is definitely a
difference right? So what could be the difference?

Any ideas on how to solve this puzzle?


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