Re: [rules-users] Ensure all values in a list are unique?

Maybe I'm missing something but couldn't you simply create checkGroups as a Set<String>and just compare its size() to $fact.Groups.size() ? rule check when $fact : StrColl( $gr : groups, eval( $gr.size() != (new HashSet( $gr )).size() ) ) then System.out.println( "failed" ); end -W On Fri, Apr 17, 2009 at 8:22 AM, campbeln <nicholas.campbell(a)arc.gov.au&gt;wrote: > > I have an ArrayList of strings that I need to ensure are all internally > unique (ie: {"1","2","3"} = OK, {"1","2","1"} = Error). I've managed to > cobble together the code below but I'm running into the "forall w/ an > internal from" issue. I don't believe an upgrade is feasible at the > moment, > so are there any alternative solutions? > > NOTE: The collection of both $factGroups and $checkGroups is almost > definitely redundant, so please keep any laughing to a minimum =) > > > rule "BR033" > no-loop true > when > $fact : MyFact() > > //# Get 2 copies of all the Groups associated with the > $fact > $factGroups : ArrayList() from collect ( > Group() from $fact.Groups > ) > $checkGroups : ArrayList() from collect ( > Group() from $fact.Groups > ) > > //# Traverse the $factGroups comparing each $currentGroup > to the list > //# within $checkGroups, erroring out if something other > then 1 is found > forall ( > $currentGroup : Group(this memberOf $factGroups) > $test : ArrayList(size != 1) from collect( > Group(this == $currentGroup) from > $checkGroups > ) > ) > then > System.out.println("Failed: BR033"); > end > > I have found a number of postings that seem to be related, namely > > http://www.nabble.com/Best-practice-for-rules-against-multiple-objects-td... > but I've been unable to cobble together a solution thus far. All help is > appreciated! > > Thanks! > -- > View this message in context: > http://www.nabble.com/Ensure-all-values-in-a-list-are-unique--tp23071079p... > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > 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