This is exactly what DynaBeans were invented for. Using BCEL to generate classes on the fly is impressive, but wouldn't it be simpler to just use the DynaBeans, which I believe are in 1.1?
Niall > -----Original Message----- > From: Thorbjørn Ravn Andersen (Scandiatransplant) > [mailto:[EMAIL PROTECTED]] > Sent: 15 April 2002 16:15 > To: Struts Users Mailing List > Subject: Creating beans dynamically from byte code in a byte[] > withClassLoader.defineClass - how to do it right? > > > > I have spent some time lately figuring out how I can generate beans > on-the-fly with fields completely specified at run-time, since this would > be an enourmeous help when working with JDBC and Struts in an informal > matter (which is why I ask here :-) > > I have used Apache Jakarta BCEL to construct the byte-code I need for the > bean (verified by dumping it to disk, and using "java" and 'javap -c' on > the class file), and I would then like to get the SystemClassLoader and > call defineClass on my byte array to get a Class, and then resolve it. > > Unfortunately I cannot do this, since the defineClass method is protected > final, so I am a bit at a loss here. I just need some code which can > instantiate my byte code into a Class, so I can get this working. I > would prefer not to use physical files, but I have a JSP-environment so > that might be an option. (Resin+Tomcat). > > Is there somebody who have a solution for this problem? I would > appreciate all pointers. > > -- > Thorbjørn Ravn Andersen > Scandiatransplant, c/o Christian Mondrup > 89 49 53 01 > http://biobase.dk/~tra > > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
