Re: [rules-users] mvel error?

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