Re: [rules-users] mvel error?

Thanks Chris. Just replacing "product.type == ProductType.WA" by the same as an eval works. But it is strange that in one place the original line works while three lines down the same line doesn't. Christine > Hi, > I found out I had this king of errors when I was using nested accessors > like > : > > Number () from accumulate ( > $person : Person( > age > 18, > dog.weight > 50 > ), > sum($person) > ) > > I found I could get rid of these this way : > > Number () from accumulate ( > $person : Person( > age > 18 > )&& eval($person.getDog().getWeight()>50), > sum($person) > ) > > I guess it is not optimized at all, but at least it does not raise strange > exception. > Chris > > > > 2008/4/25 Christine <christine(a)christine.nl&gt;: > >> Hi, >> does anyone know what this error means? >> It happens when I put an enum constant in a rule. I use the same enum >> constant in another part of the same rule with no problem. >> >> Christine >> >> org.drools.RuntimeDroolsException: Exception executing predicate >> org.drools.base.mvel.MVELPredicateExpression@125844f >> at >> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:216) >> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:132) >> at >> >> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) >> at >> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153) >> at org.drools.reteoo.Rete.assertObject(Rete.java:175) >> at >> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) >> at >> org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) >> at >> >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:909) >> at >> >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:881) >> at >> >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:682) >> at >> >> nl.ing.towardsdeepdrive.rules.SalesRules.assertCompetitorProduct(SalesRules.java:42) >> at rules.SalesRulesTest.TestRules(SalesRulesTest.java:53) >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> at >> >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >> at >> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >> at java.lang.reflect.Method.invoke(Method.java:585) >> at >> org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59) >> at >> org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98) >> at >> org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79) >> at >> >> org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87) >> at >> org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77) >> at >> org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42) >> at >> >> org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88) >> at >> >> org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51) >> at >> >> org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44) >> at >> org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27) >> at >> org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37) >> at >> org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42) >> at >> >> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38) >> at >> >> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) >> at >> >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460) >> at >> >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673) >> at >> >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386) >> at >> >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196) >> Caused by: org.mvel.CompileException: cannot invoke getter: getType >> [declr.class: nl.ing.towardsdeepdrive.data.model.Product; act.class: >> null] >> at >> >> org.mvel.optimizers.impl.refl.GetterAccessor.getValue(GetterAccessor.java:52) >> at >> >> org.mvel.optimizers.impl.refl.VariableAccessor.getValue(VariableAccessor.java:39) >> at >> >> org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated(VariableDeepPropertyNode.java:22) >> at >> >> org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:21) >> at >> >> org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:21) >> at org.mvel.MVELRuntime.execute(MVELRuntime.java:88) >> at >> org.mvel.CompiledExpression.getValue(CompiledExpression.java:111) >> at org.mvel.MVEL.executeExpression(MVEL.java:235) >> at >> >> org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:36) >> at >> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:210) >> ... 33 more >> Caused by: java.lang.NullPointerException >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> at >> >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >> at >> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >> at java.lang.reflect.Method.invoke(Method.java:585) >> at >> >> org.mvel.optimizers.impl.refl.GetterAccessor.getValue(GetterAccessor.java:42) >> ... 42 more >> >> >> >> _______________________________________________ >> 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 > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users