Implementing UserContextProvider

[Tsuyoshi Ito]

Hi there

Currently I try to implement a UserContextProvider, which contains information 
about the user (see CLEREZZA-87).

I am not sure how to add information to the user node if PLATFORM.user property 
already exists in the context-node/graph.


String userName = getUserName();
GraphNode agent = userManager.getUserGraphNode(userName);
if(!(node.getObjects(PLATFORM.user).hasNext())) {
        node.addProperty(PLATFORM.user, agent.getNode());
} else {
        Resource user = node.getObjects(PLATFORM.user).next();
        
        //TODO: adding triples to the existing resource.
}

node = new GraphNode(node.getNode(), new UnionMGraph(node.getGraph(),
                                agent.getGraph()));

Thanks for your help.

CHeers
Tsuy