[rules-users] Checking whether an element exists as well doesnt exists in several lists

[devan.vanreenen at gmail.com]

Hi there, 

Please assist

I have an several alert objects in working memory which have been logically
collected per case number using the following rule, 

rule 'Group alerts for a specific case' 
dialect 'java' 
when 
	    Alert( $caseNumber : caseNumber, $alertNo: alertNo ) 
	    not Alert( caseNumber == $caseNumber, alertNo < $alertNo )
	    $list : List( ) from collect($alert : Alert( caseNumber ==
$caseNumber)) 
then  

        System.out.println("******Printing list******: "); 
       	System.out.println("******List hashCode: " + $list.hashCode()); 
        for(Object o : $list){ 
                System.out.println(o); 
        }


I then declare a fact CaseList with a property with name value and type
List, each time a new List is collected, I create a new CaseList and set
this list on this intance and logically insert this intance

CaseList caseList  = new CaseList();
caseList.setValue($list);
insertLogical(caseList);
        
        end



Sample output

******Printing list******: 
******List hashCode: 342532614
Alert [caseNumber=1022621, alertNo=6]
Alert [caseNumber=1022621, alertNo=6]
Alert [caseNumber=1022621, alertNo=6]
Alert [caseNumber=1022621, alertNo=2]
Alert [caseNumber=1022621, alertNo=1]
Alert [caseNumber=1022621, alertNo=2]
Alert [caseNumber=1022621, alertNo=2]
Alert [caseNumber=1022621, alertNo=8]
******Printing list******: 
******List hashCode: 890817600
Alert [caseNumber=1021567, alertNo=1]
Alert [caseNumber=1021567, alertNo=2]
Alert [caseNumber=1021567, alertNo=8]
******Printing list******: 
******List hashCode: -1376001294
Alert [caseNumber=1012283, alertNo=1]
Alert [caseNumber=1012283, alertNo=2]
Alert [caseNumber=1012283, alertNo=6]
Alert [caseNumber=1012283, alertNo=2]
Alert [caseNumber=1012283, alertNo=8]
Alert [caseNumber=1012283, alertNo=2]
******Printing list******: 
******List hashCode: -1069600305
Alert [caseNumber=55506677, alertNo=1]
Alert [caseNumber=55506677, alertNo=2]
Alert [caseNumber=55506677, alertNo=6]

I then have a different rule that checks for any CaseList objects in working
memory and needs to interrogate each instance and collected list to see
whether the list contains an alert with alertNo == 4 or 5 or 6 and does not
contain an alert with alertNo == 7 or == 8 and then creates a new inferred
fact HighPriority if this is the case which other rules act on.

I use the following rule to be able to do this logic and expect a single
HighPriority intance in working memory but there are several, am I doing it
wrong, 
rule 'Determine if High priority' 
dialect 'java' 
when 
	    $a1 : Alert( alertNo == 4 || == 5 || == 6 )
	    $a2 : Alert( alertNo == 7 || == 8 )  
	    $m : CaseList( value contains $a1 && not contains $a2 )
		
then 
		HighPriority hp = new HighPriority();
		hp.setValue(true);
		insertLogical(hp);     
end 



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