Re: Passing null value into context

[Lance Java]

No, you can generate the context as normal. Just use EventContext in the
event to support a dynamic number of context values (ie 0 or 1 values).

Eg:

   <t:eventlink event="myEvent" context="prop:myContext">...</t:eventlink>

   public Object getMyContext() {
      if (someObject == null) return Collections.emptyList();
      return someObject;
   }

   void onMyEvent(EventContext ec) {
      if (ec.getCount() == 0)
     // no context
      else if (ec.getCount() == 1) {
     // context provided
     Foo myFoo = ec.get(Foo.class, 0);
doStuff(foo);
      } else {
     throw new Exception();
  }
   }