Re: [rules-users] Combined OR/NOT Rules results in NullPointerException

If you mean when ( $value1: Value(...) not Input(...) or $value2: Value(...) not Input(...) ) $solution: SolutionInput(...) then ... you'll have to use parentheses. If not, what *do* you mean? -W On 3/29/10, Sebastian Furth <sebastian.furth(a)googlemail.com&gt; wrote: > Hello, > > i've already mailed last week with the same problem and with your help I was > able to locate the source of the following NullPointerException which > happens if we try to insert the Fact "knocking" (@see Source Code of the > Java Class here: http://www.pastie.org/private/juv7hh7rxahpluo5agu3q) : > > *java.lang.NullPointerException > at org.drools.reteoo.LeftTuple.get(LeftTuple.java:265) > at org.drools.reteoo.LeftTuple.get(LeftTuple.java:300) > at > org.drools.rule.VariableRestriction$ObjectVariableContextEntry.updateFromTuple(VariableRestriction.java:320) > at > org.drools.common.SingleBetaConstraints.updateFromTuple(SingleBetaConstraints.java:119) > at org.drools.reteoo.NotNode.assertLeftTuple(NotNode.java:98) > at > org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117) > at > org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:34) > at org.drools.reteoo.NotNode.assertLeftTuple(NotNode.java:123) > at > org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:145) > at > org.drools.reteoo.CompositeLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:57) > at > org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:142) > at > org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:42) > at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:147) > at > org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:360) > at > org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:344) > at > org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:185) > at > org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:146) > at > org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1046) > at > org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1001) > at > org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788) > at > org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:216) > at de.d3web.we.drools.DroolsAction.addFacts(DroolsAction.java:334) > * > > The source of the problem is the following rule: > > *rule "R50" > when > $value1 : Value(value == "knocking") > not Input(name == "Engine noises" && values contains $value1) > or > $value2 : Value(value == "ringing") > not Input(name == "Engine noises" && values contains $value2) > $solution : SolutionInput(name == "Bad ignition timing") > then > $solution.setValue(N3); > end > * > > Could you please tell me how I have to formulate the rule to avoid the > NullPointerException while inserting the fact? > > Thank you in advance for your help. > > Best regards > > Sebastian Furth > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users