Hi All,
I wanted to throw to discussion a feature that might be good in Drools. I am
basically trying to model a formula evaluator in a decision table. The idea
being that a business user directly defines formulas(without having to use
Guided Editors in the BRMS or Eclipse, as business users love Excel more than
anything else..;)).
The thing I am trying to do is the following:
Condition Action
T:FormulaFact
formulaName int salary=t.getSalary();
t.setBenefit($1);
Formula1 salary * 100
Formula2 salary * 1000
Everything runs great as Excel simply substitutes the entered string into the
function. The problem I face is when I write something like this:
Formula3 min(salary,100)
The "," here is treated as the delimited of a parameter. So the compiled DRL
does not set the string correctly. It would make a rule like
Rule FormulaTable_123
When
T: FormulaFact(formulaName="Formula1")
Then
int salary=t.getSalary();
t.setBenefit(min(salary); //Since the words after the , become part of $2
which is not defined.
End
Is there any-way to declaratively change the Decision Table Parser to not use ,
for delimiting between parameters and use some other character.
I could always write the DT using my character, then compile the DT into DRL
and replace my character with ,(I am thinking of using "Colon"), but would it
be a good idea to have an Excel or a Property File that can be read by the
SpreadSheetCompiler to change the delimited character used by the Parser.
Cheers,
Vikrant
MASTEK LTD.
Mastek is in NASSCOM's 'India Top 20' Software Service Exporters List.
In the US, we're called MAJESCOMASTEK
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