Getting custom property functions to work with Fuseki

[Andrew Reslan]

I have three custom property functions, that I have been using in Jena for some 
time.

I have been using these through Java code, and manually register the function 
factory before queries are processed.

I want to use these property functions via Fuseki, but at the moment it looks 
as though they are being bypassed and the query gets send through to the 
backing store (in this case D2RQ).

I have added the following line to my config file in the server definition to 
load a class that registers the property functions in a static block.

[] ja:loadClass "foo.bar.MyClass"

If I use the wrong class name then I see a ClassNotFoundError, so it appears 
that the class is correctly located.

In the class I have added a static block:

{
        PropertyFunctionRegistry.get().put("FUNCTION1 URI", new 
FunctionFactory());
        PropertyFunctionRegistry.get().put("FUNCTION2 URI", new 
FunctionFactory());
        PropertyFunctionRegistry.get().put("FUNCTION3 URI", new 
FunctionFactory());
}

I have added System.err debug messages to the static block and the function 
classes, but I see none of these, does fuseki redirect System.err?

Andy