Class Enhancement without a .jdo file

Question

Is it possible to do a byte code enhancement using the KODO APIs passing in
a data structure containing the .jdo metadata file information without
having to explicitly create a .jdo file?
I'm looking at using the enhance() method of JDOEnhancer class and it looks
like I have to have a .jdo file on disk. Is there any way to avoid it?
In my enviornment I read information from a master metadata file, use that
to generate Java code, invoke the compiler on it and now I'd like to invoke
the enhancer on the class files - i'd like to do all this one shot. Since I
have all the information needed in memory, I don't want to create a .jdo
file and have the enhancer read that file.
Thanks
Vijay

Answer 1

Vijay-
You do always need the .jdo metadata file for your classes; the JDO
specification requires it. Note, though, that you could just have a
single top-level package.jdo file that holds the metadata for all your
classes, so that you would only need to create a single file.
Technically, I suppose you could use a custom ClassLoader that overrides
getResourceAsStream() (since this is the way we locate .jdo metadata
files for classes), and return a textual stream of the contents of the
..jdo metadata. It might work, but we advise against it, since using
custom ClassLoaders can introduce very tricky problems that are
difficult to debug.
In article <bju9ua$ops$[email protected]>, Vijay Ganesan wrote:
>
Is it possible to do a byte code enhancement using the KODO APIs passing in
a data structure containing the .jdo metadata file information without
having to explicitly create a .jdo file?
I'm looking at using the enhance() method of JDOEnhancer class and it looks
like I have to have a .jdo file on disk. Is there any way to avoid it?
In my enviornment I read information from a master metadata file, use that
to generate Java code, invoke the compiler on it and now I'd like to invoke
the enhancer on the class files - i'd like to do all this one shot. Since I
have all the information needed in memory, I don't want to create a .jdo
file and have the enhancer read that file.
Thanks
Vijay--
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com