Re: [rules-users] calling a function in When of DRL
The conditional element eval() expects a boolean expression. See
Expert 6.0.x -- 7.8.3.8. Conditional Element eval, where it also
explains why it is slower.
For combining a void method call with the boolean evaluation, use a
DRL function. See Expert 6.0.x -- 7.6. Function.
function boolean initcomp( Map map, String s1, String s2 ){
...
}
-W
On 10/01/2014, wtang <wtang(a)kana.com> wrote:
I need to call a java function in the LHS (When part of the DRL) like
so:
When
eval(DataComparator.compare("key1", "key2"))
where key1 and key2 are keys into a Map encapsulated by DataComparator
class. How do I pass the Map to the DataComparator class in the first
place. Do I have to do like so:
eval(DataComparator.init(Map<String, String> map)
eval(DataComparator.compare("key1", "key2")
This all seems like a bad hack to me.
What are the standard best practice to achieve what I need?
Also eval are slow why? is eval the only way to call a function in the
When
part?
thx!
--
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