Fuseki doubt

[Miguel Bento Alves]

I have a semantic environment where I have, besides ontologies and data, jena 
rules, custom built-in functions that are called in jena rules. Can I implement 
a Fuseki server that answer to a sparql command considering all these things?

For example, I have a sparql command:

Select ?p1 ?p2
where 
        {
        ?p1 exa:isGrandFather ?p2 .
        ?p1 rdf:type exa:Adult .
        }

I execute the command above in my semantic environment. I want to be able to 
execute also in a Sparql endpoint. Is this possible? I didn’t figure out how 
can I do it. 

(note: this is just an example to simplify, is not my real case)

Considering: 

I have the follow rules:
        
(?p1 :isGrandFather ?p2) <-
        (p1 exa:isParent ?p3), 
        (?p2 exa:isFatherOf ?p2). 

(?p1 rdf:type exa:Adult) <-
        (?p1 exa:birthday ?d), 
        getAge(?d, ?age), 
        ge(?age, 18). 

getAge is a custom built-in function.

Miguel