Hi Jukka, --- Jukka Santala <[EMAIL PROTECTED]> wrote: > On Mon, 7 Oct 2002, Dalibor Topic wrote: > > That means we'd have to operate on bytecode level. > > There are many toolkits for such projects. I > believe > > that's preferable to writing a java parser and > doing a > > source-to-source translation on all java library > > source code. > > Admittedly the preprocessor approach does have its > disadvantages. However, > how do you do conditional specification on bytecode > level, especially with > optimization? I guess you could just specify that > optimization always > happens after the conditional selection. I still > remain somewhat > suspicious; this toolkit would likely need to be > able to generate > alternative code etc. and certainly preprocessors > for source-code are much > more common/available than bytecode managers.
This is a question of what kind of granularity you need. If you need to be able to select different packages, classes, interfaces, fields, and methods as belonging to a profile, a bytecode level tool to do that should be feasible with todays bytecode management tools (jopt, for example). If, on the other hand, you need to be able to select different behaviours within methods depending on the profile (for example: use java 1.0 security mechanisms if we are running under 1.0 profile, use 1.1 security mechanisms if we are running under a 1.1 profile, use 1.2 security mechanisms if we are running under a 1.2+ profile), then you have a problem. You could use a preprocessor, with all the code management problems that brings, or you could split the code off for different profiles, with all the code management problems that brings. That's the crucial question in my opinion: what kind of granularity do we need to allow for decribing a profile? I assume that selecting methods & fields is enough for most applications. What would you need? best regards, dalibor topic __________________________________________________ Do you Yahoo!? Y! Web Hosting - Let the expert host your web site http://webhosting.yahoo.com/ _______________________________________________ kaffe mailing list [EMAIL PROTECTED] http://kaffe.org/cgi-bin/mailman/listinfo/kaffe
