[jboss-jira] [JBoss JIRA] Created: (JBRULES-837) Collect keyword matches two conflicting rules

[Viktor Nordling (JIRA)]

Collect keyword matches two conflicting rules
---------------------------------------------

                 Key: JBRULES-837
                 URL: http://jira.jboss.com/jira/browse/JBRULES-837
             Project: JBoss Rules
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 3.1-m1
         Environment: java 1.5
            Reporter: Viktor Nordling
         Assigned To: Mark Proctor


If you have two rules:

rule "A"
	when
		$a : ArrayList( size:size == 2 ) from collect (Car())
	then
		System.out.println("A: size = " + size);
end

rule "B"
	when
		$b : ArrayList( size:size == 3 ) from collect (Car())
	then
		System.out.println("B: size = " + size);
end

And you put two Cars in working memory, both A and B will be fired. Since there are two cars in working memory, only rule A should be fired.

If you change the order of the rules, or make rule A match size == 3 and rule B match size == 2, no rules will be fired instead.

The only workaround found is to add some criteria for the Car, in ONE of the rules. If rule A for example is:

rule "A"
	when
		$a : ArrayList( size:size == 2 ) from collect (Car(color == "RED"))
	then
		System.out.println("A: size = " + size);
end

Then only rule A will be fired. If the same criteria is also added in rule B, both rules will be fired again.

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