public Object getObjectInstance(Object obj,
    Name name,
    Context nameCtx,
    Hashtable environment) throws NamingException 
{
        
        if (!(obj instanceof ResourceLinkRef))
            return null;
        // Can we process this request?
        Reference ref = (Reference) obj;
        String type = ref.getClassName();
        // Read the global ref addr
        String globalName = null;
        RefAddr refAddr = ref.get(ResourceLinkRef.GLOBALNAME);
        if (refAddr != null) {
            globalName = refAddr.getContent().toString();
            Object result = null;
            result = globalContext.lookup(globalName);
            // FIXME: Check type
            return result;
        }
        return (null);
}

Create a new DataSource instance.

 public static  void setGlobalContext(Context newGlobalContext) 
{
    // --------------------------------------------------------- Public Methods
        if (globalContext != null)
            return;
        globalContext = newGlobalContext;
}

Set the global context (note: can only be used once).