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On 12 October 2010 22:18, Kumar Pandey <kumar.pandey@gmail.com> wrote:

Michale
Thanks for the response.
Here's the link for the thread .

http://drools-java-rules-engine.46999.n3.nabble.com/Check-if-fact-is-subset-of-items-in-the-rule-td1680013.html#a1680013

and the original about matching strings in two arrays.
http://drools-java-rules-engine.46999.n3.nabble.com/Matching-strings-in-two-arrays-td1602511.html#a1602511

My use case is that I could have hundreds of rule and each rule could have its own set of strings.
A fact object is run through these rules to see which ones are fired.
One of the condition to check is that the a list in the fact is not a subset of list in the rule.
That is fire the rule only if list in fact is not a subset of list in rule.

Thanks
Kumar

On Tue, Oct 12, 2010 at 12:38 PM, Michael Anstis <michael.anstis@gmail.com> wrote:

OK, I admit I don't have the original thread anymore.

If I am not wrong (which is always a possibility) for Wolfgang's operator to work you'd need to externalise the superset from the rule into WorkingMemory. You could have a rule with higher salience construct the superset WM fact.

If you don't mind re-posting or providing a link to the complete thread (on Nabble or somewhere) I'll happily try to help further.

On 12 October 2010 17:23, <kumar.pandey@gmail.com> wrote:

<quote author='Michael Anstis-2'>

Wolfgang gave a great solution.
</quote>
Don't know if I'm missing something obvious here. I have a superset in the rule itself. Each rule has a superset list. In this case how would I use Wolfgang's solution. Its comparing through two arrays in runtime. I have not been able to construct an array construct with specific values in the rule itself.