[jboss-jira] [JBoss JIRA] (DROOLS-731) In a catch22 using a NOT constraint in rules shared by multiple facts

[Bill Tuminaro (JIRA)]

Bill Tuminaro created DROOLS-731:
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             Summary: In a catch22 using a NOT constraint in rules shared by multiple facts
                 Key: DROOLS-731
                 URL: https://issues.jboss.org/browse/DROOLS-731
             Project: Drools
          Issue Type: Feature Request
          Components: core engine
    Affects Versions: 6.1.0.Final, 6.0.1.Final
         Environment: Custom application that completely wraps Drools Fusion written as an OSGI application hosted on Websphere Liberty profile.
            Reporter: Bill Tuminaro
            Assignee: Mario Fusco


I have a reproducer for these related issues.

We have encountered a couple of issues (Exceptions) when using a NOT constraint in rules that have facts associated with them when we call upgradeToVersion() or kSession.delete(). The catch22 is that one version of the NOT constraint avoids one Exception while causing another. Reproducing the issue requires 2 rules sharing the same NOT constraint. I have narrowed the issue(s) down to 2 very simple rules that use the org.drools.compiler.FactA class.

Here are the 2 rules used:

	static final String ruleDrl = "package org.some.test\n" +
			"import org.drools.compiler.FactA\n" +
			"declare FactA\n" +
			"@role(event)" +
			"end\n" +
			"rule \"R200_0\" when\n" +
//			"  $FactA : FactA ($FactA_field2 : field2 == 111002)\n" +  // version A: using this version causes a NPE when calling ksession.delete()
			"  not FactA($FactA_field2 == 111002, this after $FactA)\n" +  
			"  not FactA(field2 == 105742, this after $FactA)\n" +  // Version B: using this version causes the IllegalArgumentException: Cannot remove a sink, 
                                                                    // when the list of sinks is null on the updateToVersion() call

			"then\n" +
			"end\n";

	static final String ruleDrl2 = "package org.some.test\n" +
			"import org.drools.compiler.FactA\n" +
			"declare FactA\n" +
			"@role(event)" +
			"end\n" +
			"rule \"R1437_0\" when\n" +
			"  $FactA : FactA ($FactA_field2 : field2 == 105742)\n" +
			"  not FactA($FactA_field2 == 105742, this after $FactA)\n" + // version A:
//			"  not FactA(field2 == 105742, this after $FactA)\n" +  // Version B:
			"then\n" +
			"end\n";








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