Re: [rules-users] Check if fact is subset of items in the rule

OK, unless I'm missing something else you should be able to do something like this:- rule "setup superset - Rule 1" when then Element ss = new Element("Super set - Rule 1", 1, 2, 3); insert(ss); end rule "rule 1" when $f : Fact() Element(name="Super set - Rule 1", $f.numbers subsetOf numbers) then //Do something end This uses Wolfgang's Element Class from his example creating custom operators and assumes Fact exposes a "numbers" property which returns a Collection. This remains untested but I have no reason to doubt Wolfgang. With kind regards, Mike 2010/10/13 Kumar Pandey <kumar.pandey(a)gmail.com&gt; > Well the problem is in forming the DRL :) > My use case is each rule represents an item with its specific property. > Fact is a user property and I want to filter the items for this user based > on the users incoming property as facts. > > > I have been able to get it working like so but eval is not optimum for > Rete. I was hoping for a better solution that would utilize the Rete > optimization. > > Here's my unit test DRL. Note, I have a isNotSubset method in my fact > object and I'm getting the list from rule and doing a check. > > package com.test > import com.rule.OfferFact; > global java.util.List list > > rule rule_not_sub_set > when > $context : Fact() > eval($context.isNotSubset("SINGER","DANCER", "DOCTOR")) > then > list.add(drools.getRule().getName()); > end > > > 2010/10/13 Michael Anstis <michael.anstis(a)gmail.com&gt; > >> Not as clear as I'd hoped; can you provide an actual rule DRL? >> >> 2010/10/13 Kumar Pandey <kumar.pandey(a)gmail.com&gt; >> >> Michael >>> Here are some examples >>> >>> Rule1 has "str1", "Str2", "Str3" >>> >>> Rule2 has "str2", "Str3", "Str5", "Str6", "Str7" >>> >>> Rule3 has "str1", "Str3", "Str6" >>> >>> etc. >>> >>> With fact1 that has "str1", "Str3" , since this is subset of values in >>> Rule1 and Rule3, they should not fire but Rule2 should fire >>> >>> With fact2 that has "str2", "Str6", "Str7", Rule 2 should not fire and >>> Rule1 and Rule3 should fire. >>> >>> Hope this is clear. >>> >>> Thanks >>> Kumar >>> >>> 2010/10/13 Michael Anstis <michael.anstis(a)gmail.com&gt; >>> >>>> Thanks, please provide a specific example rule too. >>>> >>>> Don't forget to keep your posts to the mailing list for the good of the >>>> community. >>>> >>>> >>>> On 12 October 2010 22:18, Kumar Pandey <kumar.pandey(a)gmail.com&gt; 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-subs... >>>>> >>>>> and the original about matching strings in two arrays. >>>>> >>>>> http://drools-java-rules-engine.46999.n3.nabble.com/Matching-strings-in-t... >>>>> >>>>> >>>>> 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(a)gmail.com&gt; 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(a)gmail.com&gt; 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. >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing list >>>> rules-users(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>> >>>> >>> >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users