Small code donation

Hello,

Am sending this small code as i think it might be useful to shark-CORBA.

It's a simple code generator which explore the shark client CORBA interfaces
and creates wrappers around each of them (as long as they can be reached by
a trail of calls coming from the initial. The wrappers are created using
the decorator design pattern. They automatically unwrap parameters if needed
and wrap results. 
The added functionnality for decorator is to catch null values on returns.
CORBA does not support nulls so instead of sending nulls, the sun corba layer 
sends a BAD_PARAM exception with a 201 minor code (see 
http://java.sun.com/j2se/1.4.2/docs/guide/idl/jidlExceptions.html#minorcodemeanings)

This will help developers using the shark client api as in current implementation,
catching manually all those exceptions because the shark engine sends lots of
null when dealing with description process (process description, activity description) or
auditEvents (the activity() might be null, resulting in one of those exceptions client-side)

To execute, ensure all shark libs are in classpath and run org.enhydra.shark.wrapper.tool.WrapperMaker

First argument must be configuration properties file (provided) and second is destination path for generated .java

Using the wrappers after is easy, replace
SharkInterface interface= SharkInterfaceHelper.narrow(ncRef.resolve(path));
by
SharkInterface interface= new SharkInterfaceWrapper(SharkInterfaceHelper.narrow(ncRef.resolve(path)));

After use as usual, all returned interfaces from call will be wrapper where needed. 
Then you don't have to worry anymore about this null return values throwing exceptions.

I think generation of wrappers could be included in the shark build process.

Regards.
-- 
David Delbecq
Royal Meteorological Institute of Belgium

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Is there life after /sbin/halt -p?

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