Hi, I have a variable declaration as bellow : >list:Variable() from ruleApp.getVariable("variableName") and this is the result : Exception in thread "AWT-EventQueue-0" org.mvel.CompileException: cannot invoke method at org.mvel.optimizers.impl.refl.MethodAccessor.getValue(MethodAccessor.java :54) at org.mvel.optimizers.impl.refl.VariableAccessor.getValue( VariableAccessor.java:39) at org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated( VariableDeepPropertyNode.java:26) at org.mvel.ast.PropertyASTNode.getReducedValueAccelerated( PropertyASTNode.java:19) at org.mvel.MVELRuntime.execute(MVELRuntime.java:88) at org.mvel.CompiledExpression.getValue(CompiledExpression.java :99) at org.mvel.MVEL.executeExpression(MVEL.java:236) at org.drools.base.dataproviders.MVELDataProvider.getResults( MVELDataProvider.java:45) at org.drools.reteoo.FromNode.assertTuple(FromNode.java:61) at org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple( CompositeTupleSinkAdapter.java:73) at org.drools.reteoo.LeftInputAdapterNode.assertObject( LeftInputAdapterNode.java:131) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject( SingleObjectSinkAdapter.java:20) at org.drools.reteoo.ObjectTypeNode.assertObject( ObjectTypeNode.java:160) at org.drools.reteoo.Rete.assertObject(Rete.java:176) at org.drools.reteoo.ReteooRuleBase.assertObject( ReteooRuleBase.java:196) at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute (ReteooWorkingMemory.java:164) at org.drools.common.AbstractWorkingMemory.executeQueuedActions( AbstractWorkingMemory.java:1260) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java :864) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java :826) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java :627) at mcmipih.rules.rules.integration.drools.ExecutionContext.executeRuleFlow( ExecutionContext.java:54) at mcmipih.rules.demo.service.DemoRuleService.validerRumList( DemoRuleService.java:50) at mcmipih.rules.demo.service.DemoRuleService$$FastClassByCGLIB$$beeddc5a.invoke (<generated>) at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint (Cglib2AopProxy.java:693) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed( ReflectiveMethodInvocation.java:139) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke( TransactionInterceptor.java:107) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed( ReflectiveMethodInvocation.java:161) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept (Cglib2AopProxy.java:628) at mcmipih.rules.demo.service.DemoRuleService$$EnhancerByCGLIB$$961244c9.validerRumList (<generated>) at mcmipih.rules.demo.controller.ValidationAppController$ActionValiderSelectionLst.actionPerformed (ValidationAppController.java:185) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Caused by: java.lang.NullPointerException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.mvel.optimizers.impl.refl.MethodAccessor.getValue(MethodAccessor.java :46) ... 54 more -- View this message in context: http://www.nabble.com/mvel-bug----tf4360199.html#a12426549 Sent from the drools - 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Hi, I believe the following syntax is not supported in Drools: list:Variable() from SOME_JAVA_CODE You should use something like: "from $list" or "from collect" or "from accumulate", and embed any Java code in an eval statement. Edson, am I missing something? Regards, CG hypnosat7 wrote: > > Hi, > > I have a variable declaration as bellow : > >>list:Variable() from ruleApp.getVariable("variableName") > > and this is the result : > Exception in thread "AWT-EventQueue-0" org.mvel.CompileException: cannot > invoke method > at > org.mvel.optimizers.impl.refl.MethodAccessor.getValue( MethodAccessor.java:54) > at > org.mvel.optimizers.impl.refl.VariableAccessor.getValue( VariableAccessor.java:39) > at > org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated( VariableDeepPropertyNode.java:26) > at > org.mvel.ast.PropertyASTNode.getReducedValueAccelerated( PropertyASTNode.java:19) > at org.mvel.MVELRuntime.execute(MVELRuntime.java:88) > at org.mvel.CompiledExpression.getValue(CompiledExpression.java :99) > at org.mvel.MVEL.executeExpression(MVEL.java:236) > at > org.drools.base.dataproviders.MVELDataProvider.getResults( MVELDataProvider.java:45) > at org.drools.reteoo.FromNode.assertTuple(FromNode.java:61) > at > org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple( CompositeTupleSinkAdapter.java:73) > at > org.drools.reteoo.LeftInputAdapterNode.assertObject( LeftInputAdapterNode.java:131) > at > org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject( SingleObjectSinkAdapter.java:20) > at org.drools.reteoo.ObjectTypeNode.assertObject( ObjectTypeNode.java:160) > at org.drools.reteoo.Rete.assertObject(Rete.java:176) > at org.drools.reteoo.ReteooRuleBase.assertObject( ReteooRuleBase.java:196) > at > org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute (ReteooWorkingMemory.java:164) > at > org.drools.common.AbstractWorkingMemory.executeQueuedActions( AbstractWorkingMemory.java:1260) > at > org.drools.common.AbstractWorkingMemory.insert( AbstractWorkingMemory.java:864) > at > org.drools.common.AbstractWorkingMemory.insert( AbstractWorkingMemory.java:826) > at > org.drools.common.AbstractWorkingMemory.insert( AbstractWorkingMemory.java:627) > at > mcmipih.rules.rules.integration.drools.ExecutionContext.executeRuleFlow( ExecutionContext.java:54) > at > mcmipih.rules.demo.service.DemoRuleService.validerRumList( DemoRuleService.java:50) > at > mcmipih.rules.demo.service.DemoRuleService$$FastClassByCGLIB$$beeddc5a.invoke (<generated>) > at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) > at > org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint (Cglib2AopProxy.java:693) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed( ReflectiveMethodInvocation.java:139) > at > org.springframework.transaction.interceptor.TransactionInterceptor.invoke( TransactionInterceptor.java:107) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed( ReflectiveMethodInvocation.java:161) > at > org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept (Cglib2AopProxy.java:628) > at > mcmipih.rules.demo.service.DemoRuleService$$EnhancerByCGLIB$$961244c9.validerRumList (<generated>) > at > mcmipih.rules.demo.controller.ValidationAppController$ActionValiderSelectionLst.actionPerformed (ValidationAppController.java:185) > at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) > at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) > at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) > at javax.swing.DefaultButtonModel.setPressed(Unknown Source) > at javax.swing.plaf.basic.BasicButtonListener.mouseReleased (Unknown > Source) > at java.awt.Component.processMouseEvent(Unknown Source) > at javax.swing.JComponent.processMouseEvent(Unknown Source) > at java.awt.Component.processEvent(Unknown Source) > at java.awt.Container.processEvent(Unknown Source) > at java.awt.Component.dispatchEventImpl(Unknown Source) > at java.awt.Container.dispatchEventImpl(Unknown Source) > at java.awt.Component.dispatchEvent(Unknown Source) > at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) > at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) > at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) > at java.awt.Container.dispatchEventImpl(Unknown Source) > at java.awt.Window.dispatchEventImpl(Unknown Source) > at java.awt.Component.dispatchEvent(Unknown Source) > at java.awt.EventQueue.dispatchEvent(Unknown Source) > at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source) > at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) > at java.awt.EventDispatchThread.pumpEvents(Unknown Source) > at java.awt.EventDispatchThread.pumpEvents(Unknown Source) > at java.awt.EventDispatchThread.run(Unknown Source) > Caused by: java.lang.NullPointerException > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) > at java.lang.reflect.Method.invoke(Unknown Source) > at > org.mvel.optimizers.impl.refl.MethodAccessor.getValue( MethodAccessor.java:46) > ... 54 more > -- View this message in context: http://www.nabble.com/mvel-bug----tf4360199.html#a12429712 Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users