[rules-users] Check if a pattern binding exists in the RHS

[hatzlj]

Hello everybody,

on the LHS of my rule i connect several Conditions with OR and have
different variable bindings for this Condition. Now - if any of this
conditions does not fire, i assume that the binding variable is not created,
so I can't access it in the RHS. This results in an null pointer exception
when I call the fireAllRules-Command in my Java Application.

A simple rule example:
rule "Rule 1"
   when
      HKT: Parameter(parameterCode = "HKT", value < normalFloor) or
      GGT: Parameter(parameterCode = "GGT", value < normalFloor) or
      HSR: Parameter(parameterCode = "HSR", value < normalFloor) and
      GOT: Parameter(parameterCode = "GOT", value > normalFloor)

   then
      System.out.println(HKT.toString();

end

So my Question is: Is there any way to check in the RHS wheter the pattern
binding has been created or not or do i have to change the way of writing my
rules (which i do not want to)?

thanks,
hatzlj
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